./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy7.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/test-easy7.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 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:17:14,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:17:14,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:17:14,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:17:14,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:17:14,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:17:14,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:17:14,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:17:14,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:17:14,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:17:14,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:17:14,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:17:14,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:17:14,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:17:14,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:17:14,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:17:14,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:17:14,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:17:14,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:17:14,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:17:14,149 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:17:14,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:17:14,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:17:14,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:17:14,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:17:14,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:17:14,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:17:14,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:17:14,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:17:14,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:17:14,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:17:14,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:17:14,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:17:14,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:17:14,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:17:14,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:17:14,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:17:14,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:17:14,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:17:14,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:17:14,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:17:14,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:17:14,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:17:14,196 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:17:14,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:17:14,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:17:14,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:17:14,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:17:14,198 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:17:14,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:17:14,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:17:14,199 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:17:14,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:17:14,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:17:14,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:17:14,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:17:14,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:17:14,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:17:14,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:17:14,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:17:14,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:17:14,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:17:14,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:17:14,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:17:14,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:17:14,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:17:14,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:17:14,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:17:14,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:17:14,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:17:14,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:17:14,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:17:14,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:17:14,203 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:17:14,203 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:17:14,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:17:14,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 [2022-07-21 09:17:14,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:17:14,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:17:14,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:17:14,485 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:17:14,486 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:17:14,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy7.wvr.c [2022-07-21 09:17:14,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fed78e86/0bfcceb771be44d5b7d03265214940ae/FLAG94d25825b [2022-07-21 09:17:14,864 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:17:14,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy7.wvr.c [2022-07-21 09:17:14,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fed78e86/0bfcceb771be44d5b7d03265214940ae/FLAG94d25825b [2022-07-21 09:17:15,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fed78e86/0bfcceb771be44d5b7d03265214940ae [2022-07-21 09:17:15,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:17:15,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:17:15,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:17:15,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:17:15,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:17:15,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55249229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15, skipping insertion in model container [2022-07-21 09:17:15,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:17:15,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:17:15,450 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/test-easy7.wvr.c[1872,1885] [2022-07-21 09:17:15,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:17:15,457 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:17:15,480 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/test-easy7.wvr.c[1872,1885] [2022-07-21 09:17:15,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:17:15,499 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:17:15,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15 WrapperNode [2022-07-21 09:17:15,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:17:15,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:17:15,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:17:15,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:17:15,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,552 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2022-07-21 09:17:15,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:17:15,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:17:15,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:17:15,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:17:15,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:17:15,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:17:15,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:17:15,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:17:15,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (1/1) ... [2022-07-21 09:17:15,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:17:15,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:15,612 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) [2022-07-21 09:17:15,642 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 [2022-07-21 09:17:15,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:17:15,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:17:15,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:17:15,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:17:15,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:17:15,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:17:15,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:17:15,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:17:15,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:17:15,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:17:15,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:17:15,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:17:15,657 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:17:15,735 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:17:15,736 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:17:15,921 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:17:15,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:17:15,928 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 09:17:15,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:17:15 BoogieIcfgContainer [2022-07-21 09:17:15,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:17:15,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:17:15,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:17:15,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:17:15,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:17:15" (1/3) ... [2022-07-21 09:17:15,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3b3bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:17:15, skipping insertion in model container [2022-07-21 09:17:15,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:15" (2/3) ... [2022-07-21 09:17:15,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3b3bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:17:15, skipping insertion in model container [2022-07-21 09:17:15,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:17:15" (3/3) ... [2022-07-21 09:17:15,945 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy7.wvr.c [2022-07-21 09:17:15,950 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:17:15,957 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:17:15,957 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:17:15,957 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:17:16,013 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:17:16,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 204 flow [2022-07-21 09:17:16,084 INFO L129 PetriNetUnfolder]: 2/92 cut-off events. [2022-07-21 09:17:16,084 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:17:16,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 2/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2022-07-21 09:17:16,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 204 flow [2022-07-21 09:17:16,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 83 transitions, 178 flow [2022-07-21 09:17:16,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:17:16,100 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@3032c078, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7947e51 [2022-07-21 09:17:16,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:17:16,123 INFO L129 PetriNetUnfolder]: 2/82 cut-off events. [2022-07-21 09:17:16,126 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:17:16,127 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:16,127 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] [2022-07-21 09:17:16,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 126118782, now seen corresponding path program 1 times [2022-07-21 09:17:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:16,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135934944] [2022-07-21 09:17:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:17,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:17,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135934944] [2022-07-21 09:17:17,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135934944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:17,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:17,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:17,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477186707] [2022-07-21 09:17:17,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:17,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:17,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:17,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:17,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:17,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 178 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:17,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:17,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:17,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:18,187 INFO L129 PetriNetUnfolder]: 179/515 cut-off events. [2022-07-21 09:17:18,188 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-07-21 09:17:18,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 515 events. 179/515 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2117 event pairs, 133 based on Foata normal form. 3/511 useless extension candidates. Maximal degree in co-relation 824. Up to 332 conditions per place. [2022-07-21 09:17:18,197 INFO L132 encePairwiseOnDemand]: 60/94 looper letters, 47 selfloop transitions, 28 changer transitions 34/148 dead transitions. [2022-07-21 09:17:18,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 535 flow [2022-07-21 09:17:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:17:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:17:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1583 transitions. [2022-07-21 09:17:18,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5613475177304964 [2022-07-21 09:17:18,219 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1583 transitions. [2022-07-21 09:17:18,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1583 transitions. [2022-07-21 09:17:18,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:18,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1583 transitions. [2022-07-21 09:17:18,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.766666666666666) internal successors, (1583), 30 states have internal predecessors, (1583), 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) [2022-07-21 09:17:18,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:18,241 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:18,242 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 178 flow. Second operand 30 states and 1583 transitions. [2022-07-21 09:17:18,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 535 flow [2022-07-21 09:17:18,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 521 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:17:18,252 INFO L242 Difference]: Finished difference. Result has 136 places, 103 transitions, 360 flow [2022-07-21 09:17:18,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=360, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2022-07-21 09:17:18,257 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 48 predicate places. [2022-07-21 09:17:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 360 flow [2022-07-21 09:17:18,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:18,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:18,259 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] [2022-07-21 09:17:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:17:18,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash 99695484, now seen corresponding path program 2 times [2022-07-21 09:17:18,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:18,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612641785] [2022-07-21 09:17:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:18,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:18,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612641785] [2022-07-21 09:17:18,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612641785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:18,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:18,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 09:17:18,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548408701] [2022-07-21 09:17:18,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:18,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:17:18,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:17:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:17:18,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:18,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 360 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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) [2022-07-21 09:17:18,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:18,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:18,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:19,626 INFO L129 PetriNetUnfolder]: 202/559 cut-off events. [2022-07-21 09:17:19,626 INFO L130 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2022-07-21 09:17:19,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 559 events. 202/559 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2483 event pairs, 22 based on Foata normal form. 1/558 useless extension candidates. Maximal degree in co-relation 1515. Up to 329 conditions per place. [2022-07-21 09:17:19,630 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 82 selfloop transitions, 42 changer transitions 36/199 dead transitions. [2022-07-21 09:17:19,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 1049 flow [2022-07-21 09:17:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 09:17:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-21 09:17:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1561 transitions. [2022-07-21 09:17:19,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5726338958180485 [2022-07-21 09:17:19,634 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1561 transitions. [2022-07-21 09:17:19,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1561 transitions. [2022-07-21 09:17:19,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:19,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1561 transitions. [2022-07-21 09:17:19,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 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) [2022-07-21 09:17:19,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 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) [2022-07-21 09:17:19,640 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 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) [2022-07-21 09:17:19,640 INFO L186 Difference]: Start difference. First operand has 136 places, 103 transitions, 360 flow. Second operand 29 states and 1561 transitions. [2022-07-21 09:17:19,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 1049 flow [2022-07-21 09:17:19,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 955 flow, removed 38 selfloop flow, removed 13 redundant places. [2022-07-21 09:17:19,646 INFO L242 Difference]: Finished difference. Result has 156 places, 139 transitions, 637 flow [2022-07-21 09:17:19,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=637, PETRI_PLACES=156, PETRI_TRANSITIONS=139} [2022-07-21 09:17:19,647 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 68 predicate places. [2022-07-21 09:17:19,647 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 139 transitions, 637 flow [2022-07-21 09:17:19,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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) [2022-07-21 09:17:19,648 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:19,648 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] [2022-07-21 09:17:19,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:17:19,648 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:19,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1215992582, now seen corresponding path program 3 times [2022-07-21 09:17:19,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:19,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663903651] [2022-07-21 09:17:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:19,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:20,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663903651] [2022-07-21 09:17:20,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663903651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:20,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:17:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791473309] [2022-07-21 09:17:20,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:17:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:17:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:17:20,074 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:20,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 139 transitions, 637 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:20,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:20,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:20,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:21,437 INFO L129 PetriNetUnfolder]: 240/645 cut-off events. [2022-07-21 09:17:21,437 INFO L130 PetriNetUnfolder]: For 821/821 co-relation queries the response was YES. [2022-07-21 09:17:21,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 645 events. 240/645 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3009 event pairs, 40 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 2220. Up to 401 conditions per place. [2022-07-21 09:17:21,442 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 102 selfloop transitions, 56 changer transitions 43/240 dead transitions. [2022-07-21 09:17:21,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 240 transitions, 1595 flow [2022-07-21 09:17:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:17:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:17:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2062 transitions. [2022-07-21 09:17:21,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5624659028914348 [2022-07-21 09:17:21,447 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2062 transitions. [2022-07-21 09:17:21,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2062 transitions. [2022-07-21 09:17:21,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:21,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2062 transitions. [2022-07-21 09:17:21,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.87179487179487) internal successors, (2062), 39 states have internal predecessors, (2062), 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) [2022-07-21 09:17:21,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:17:21,456 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:17:21,456 INFO L186 Difference]: Start difference. First operand has 156 places, 139 transitions, 637 flow. Second operand 39 states and 2062 transitions. [2022-07-21 09:17:21,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 240 transitions, 1595 flow [2022-07-21 09:17:21,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 1454 flow, removed 66 selfloop flow, removed 11 redundant places. [2022-07-21 09:17:21,465 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 1065 flow [2022-07-21 09:17:21,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1065, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2022-07-21 09:17:21,466 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 113 predicate places. [2022-07-21 09:17:21,466 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 1065 flow [2022-07-21 09:17:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:21,467 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:21,467 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] [2022-07-21 09:17:21,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:17:21,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1665333946, now seen corresponding path program 4 times [2022-07-21 09:17:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:21,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832678383] [2022-07-21 09:17:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:21,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:21,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832678383] [2022-07-21 09:17:21,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832678383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:21,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:21,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:21,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998862959] [2022-07-21 09:17:21,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:21,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:21,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:21,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:21,873 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:21,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 1065 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:21,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:21,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:21,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:22,851 INFO L129 PetriNetUnfolder]: 238/637 cut-off events. [2022-07-21 09:17:22,852 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-21 09:17:22,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 637 events. 238/637 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3001 event pairs, 5 based on Foata normal form. 1/637 useless extension candidates. Maximal degree in co-relation 2564. Up to 403 conditions per place. [2022-07-21 09:17:22,858 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 111 selfloop transitions, 53 changer transitions 44/247 dead transitions. [2022-07-21 09:17:22,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 247 transitions, 1855 flow [2022-07-21 09:17:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:17:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-21 09:17:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1502 transitions. [2022-07-21 09:17:22,861 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5706686930091185 [2022-07-21 09:17:22,861 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1502 transitions. [2022-07-21 09:17:22,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1502 transitions. [2022-07-21 09:17:22,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:22,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1502 transitions. [2022-07-21 09:17:22,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 53.642857142857146) internal successors, (1502), 28 states have internal predecessors, (1502), 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) [2022-07-21 09:17:22,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 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) [2022-07-21 09:17:22,868 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 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) [2022-07-21 09:17:22,868 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 1065 flow. Second operand 28 states and 1502 transitions. [2022-07-21 09:17:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 247 transitions, 1855 flow [2022-07-21 09:17:22,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 247 transitions, 1633 flow, removed 89 selfloop flow, removed 18 redundant places. [2022-07-21 09:17:22,879 INFO L242 Difference]: Finished difference. Result has 213 places, 187 transitions, 1114 flow [2022-07-21 09:17:22,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1114, PETRI_PLACES=213, PETRI_TRANSITIONS=187} [2022-07-21 09:17:22,881 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 125 predicate places. [2022-07-21 09:17:22,881 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 187 transitions, 1114 flow [2022-07-21 09:17:22,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:22,882 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:22,882 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] [2022-07-21 09:17:22,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:17:22,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 699227332, now seen corresponding path program 5 times [2022-07-21 09:17:22,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:22,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12143127] [2022-07-21 09:17:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:23,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12143127] [2022-07-21 09:17:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12143127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:23,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:23,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:17:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298704308] [2022-07-21 09:17:23,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:23,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:17:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:17:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:17:23,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:23,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 187 transitions, 1114 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:23,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:23,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:23,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:24,388 INFO L129 PetriNetUnfolder]: 261/695 cut-off events. [2022-07-21 09:17:24,388 INFO L130 PetriNetUnfolder]: For 1976/1976 co-relation queries the response was YES. [2022-07-21 09:17:24,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 695 events. 261/695 cut-off events. For 1976/1976 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3361 event pairs, 20 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 2932. Up to 446 conditions per place. [2022-07-21 09:17:24,393 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 131 selfloop transitions, 61 changer transitions 43/274 dead transitions. [2022-07-21 09:17:24,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 274 transitions, 2242 flow [2022-07-21 09:17:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:17:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:17:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2022-07-21 09:17:24,396 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2022-07-21 09:17:24,396 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2022-07-21 09:17:24,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2022-07-21 09:17:24,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:24,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2022-07-21 09:17:24,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 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) [2022-07-21 09:17:24,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:17:24,403 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:17:24,403 INFO L186 Difference]: Start difference. First operand has 213 places, 187 transitions, 1114 flow. Second operand 35 states and 1861 transitions. [2022-07-21 09:17:24,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 274 transitions, 2242 flow [2022-07-21 09:17:24,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 274 transitions, 1993 flow, removed 66 selfloop flow, removed 24 redundant places. [2022-07-21 09:17:24,415 INFO L242 Difference]: Finished difference. Result has 234 places, 215 transitions, 1438 flow [2022-07-21 09:17:24,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1438, PETRI_PLACES=234, PETRI_TRANSITIONS=215} [2022-07-21 09:17:24,422 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 146 predicate places. [2022-07-21 09:17:24,422 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 215 transitions, 1438 flow [2022-07-21 09:17:24,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:24,423 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:24,423 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] [2022-07-21 09:17:24,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:17:24,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1519473010, now seen corresponding path program 6 times [2022-07-21 09:17:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:24,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288491190] [2022-07-21 09:17:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:24,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:24,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288491190] [2022-07-21 09:17:24,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288491190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:24,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:24,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:24,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066772970] [2022-07-21 09:17:24,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:24,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:24,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:24,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:24,771 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:24,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 215 transitions, 1438 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:24,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:24,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:24,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:25,809 INFO L129 PetriNetUnfolder]: 265/713 cut-off events. [2022-07-21 09:17:25,809 INFO L130 PetriNetUnfolder]: For 2404/2404 co-relation queries the response was YES. [2022-07-21 09:17:25,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3176 conditions, 713 events. 265/713 cut-off events. For 2404/2404 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3505 event pairs, 19 based on Foata normal form. 1/712 useless extension candidates. Maximal degree in co-relation 3104. Up to 459 conditions per place. [2022-07-21 09:17:25,816 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 74 changer transitions 43/282 dead transitions. [2022-07-21 09:17:25,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 282 transitions, 2337 flow [2022-07-21 09:17:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:17:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:17:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1657 transitions. [2022-07-21 09:17:25,818 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5686341798215512 [2022-07-21 09:17:25,818 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1657 transitions. [2022-07-21 09:17:25,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1657 transitions. [2022-07-21 09:17:25,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:25,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1657 transitions. [2022-07-21 09:17:25,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.45161290322581) internal successors, (1657), 31 states have internal predecessors, (1657), 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) [2022-07-21 09:17:25,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:25,824 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:25,824 INFO L186 Difference]: Start difference. First operand has 234 places, 215 transitions, 1438 flow. Second operand 31 states and 1657 transitions. [2022-07-21 09:17:25,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 282 transitions, 2337 flow [2022-07-21 09:17:25,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 282 transitions, 2057 flow, removed 109 selfloop flow, removed 23 redundant places. [2022-07-21 09:17:25,838 INFO L242 Difference]: Finished difference. Result has 245 places, 224 transitions, 1536 flow [2022-07-21 09:17:25,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1536, PETRI_PLACES=245, PETRI_TRANSITIONS=224} [2022-07-21 09:17:25,839 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 157 predicate places. [2022-07-21 09:17:25,839 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 224 transitions, 1536 flow [2022-07-21 09:17:25,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:25,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:25,840 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] [2022-07-21 09:17:25,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:17:25,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:25,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1541157144, now seen corresponding path program 7 times [2022-07-21 09:17:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:25,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143610961] [2022-07-21 09:17:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:26,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143610961] [2022-07-21 09:17:26,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143610961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:26,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:26,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:26,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613641199] [2022-07-21 09:17:26,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:26,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:26,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:26,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:26,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 224 transitions, 1536 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:26,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:26,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:26,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:27,196 INFO L129 PetriNetUnfolder]: 264/746 cut-off events. [2022-07-21 09:17:27,196 INFO L130 PetriNetUnfolder]: For 2496/2496 co-relation queries the response was YES. [2022-07-21 09:17:27,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3276 conditions, 746 events. 264/746 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3749 event pairs, 27 based on Foata normal form. 1/745 useless extension candidates. Maximal degree in co-relation 3202. Up to 448 conditions per place. [2022-07-21 09:17:27,203 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 124 selfloop transitions, 76 changer transitions 44/283 dead transitions. [2022-07-21 09:17:27,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 283 transitions, 2405 flow [2022-07-21 09:17:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:17:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:17:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2022-07-21 09:17:27,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2022-07-21 09:17:27,206 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2022-07-21 09:17:27,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2022-07-21 09:17:27,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:27,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2022-07-21 09:17:27,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 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) [2022-07-21 09:17:27,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:27,212 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:27,212 INFO L186 Difference]: Start difference. First operand has 245 places, 224 transitions, 1536 flow. Second operand 31 states and 1658 transitions. [2022-07-21 09:17:27,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 283 transitions, 2405 flow [2022-07-21 09:17:27,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 283 transitions, 2194 flow, removed 48 selfloop flow, removed 26 redundant places. [2022-07-21 09:17:27,228 INFO L242 Difference]: Finished difference. Result has 255 places, 224 transitions, 1617 flow [2022-07-21 09:17:27,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1617, PETRI_PLACES=255, PETRI_TRANSITIONS=224} [2022-07-21 09:17:27,229 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 167 predicate places. [2022-07-21 09:17:27,229 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 224 transitions, 1617 flow [2022-07-21 09:17:27,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:27,229 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:27,230 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] [2022-07-21 09:17:27,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:17:27,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1783083334, now seen corresponding path program 8 times [2022-07-21 09:17:27,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:27,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422929585] [2022-07-21 09:17:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:27,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:27,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422929585] [2022-07-21 09:17:27,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422929585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:27,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:27,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:27,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227391930] [2022-07-21 09:17:27,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:27,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:27,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:27,567 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:27,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 224 transitions, 1617 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:27,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:27,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:27,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:28,567 INFO L129 PetriNetUnfolder]: 260/735 cut-off events. [2022-07-21 09:17:28,567 INFO L130 PetriNetUnfolder]: For 2603/2603 co-relation queries the response was YES. [2022-07-21 09:17:28,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3340 conditions, 735 events. 260/735 cut-off events. For 2603/2603 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3649 event pairs, 33 based on Foata normal form. 1/734 useless extension candidates. Maximal degree in co-relation 3261. Up to 456 conditions per place. [2022-07-21 09:17:28,576 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 73 changer transitions 39/277 dead transitions. [2022-07-21 09:17:28,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 277 transitions, 2429 flow [2022-07-21 09:17:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:17:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:17:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1603 transitions. [2022-07-21 09:17:28,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5684397163120567 [2022-07-21 09:17:28,580 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1603 transitions. [2022-07-21 09:17:28,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1603 transitions. [2022-07-21 09:17:28,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:28,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1603 transitions. [2022-07-21 09:17:28,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.43333333333333) internal successors, (1603), 30 states have internal predecessors, (1603), 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) [2022-07-21 09:17:28,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:28,587 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:28,587 INFO L186 Difference]: Start difference. First operand has 255 places, 224 transitions, 1617 flow. Second operand 30 states and 1603 transitions. [2022-07-21 09:17:28,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 277 transitions, 2429 flow [2022-07-21 09:17:28,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 277 transitions, 2192 flow, removed 35 selfloop flow, removed 29 redundant places. [2022-07-21 09:17:28,607 INFO L242 Difference]: Finished difference. Result has 256 places, 223 transitions, 1629 flow [2022-07-21 09:17:28,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1629, PETRI_PLACES=256, PETRI_TRANSITIONS=223} [2022-07-21 09:17:28,609 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2022-07-21 09:17:28,609 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 223 transitions, 1629 flow [2022-07-21 09:17:28,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:28,610 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:28,610 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] [2022-07-21 09:17:28,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:17:28,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -798716138, now seen corresponding path program 9 times [2022-07-21 09:17:28,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:28,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805067886] [2022-07-21 09:17:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:28,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:29,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805067886] [2022-07-21 09:17:29,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805067886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:29,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:29,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:17:29,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914944584] [2022-07-21 09:17:29,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:29,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:17:29,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:17:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:17:29,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:29,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 223 transitions, 1629 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:17:29,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:29,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:29,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:31,093 INFO L129 PetriNetUnfolder]: 261/743 cut-off events. [2022-07-21 09:17:31,093 INFO L130 PetriNetUnfolder]: For 2968/2968 co-relation queries the response was YES. [2022-07-21 09:17:31,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 743 events. 261/743 cut-off events. For 2968/2968 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3704 event pairs, 25 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3343. Up to 460 conditions per place. [2022-07-21 09:17:31,101 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 129 selfloop transitions, 94 changer transitions 29/291 dead transitions. [2022-07-21 09:17:31,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 291 transitions, 2637 flow [2022-07-21 09:17:31,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 09:17:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-21 09:17:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2205 transitions. [2022-07-21 09:17:31,107 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2022-07-21 09:17:31,107 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2205 transitions. [2022-07-21 09:17:31,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2205 transitions. [2022-07-21 09:17:31,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:31,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2205 transitions. [2022-07-21 09:17:31,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.5) internal successors, (2205), 42 states have internal predecessors, (2205), 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) [2022-07-21 09:17:31,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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) [2022-07-21 09:17:31,129 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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) [2022-07-21 09:17:31,130 INFO L186 Difference]: Start difference. First operand has 256 places, 223 transitions, 1629 flow. Second operand 42 states and 2205 transitions. [2022-07-21 09:17:31,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 291 transitions, 2637 flow [2022-07-21 09:17:31,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 291 transitions, 2381 flow, removed 68 selfloop flow, removed 28 redundant places. [2022-07-21 09:17:31,147 INFO L242 Difference]: Finished difference. Result has 273 places, 244 transitions, 1891 flow [2022-07-21 09:17:31,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1891, PETRI_PLACES=273, PETRI_TRANSITIONS=244} [2022-07-21 09:17:31,149 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 185 predicate places. [2022-07-21 09:17:31,149 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 244 transitions, 1891 flow [2022-07-21 09:17:31,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:17:31,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:31,149 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] [2022-07-21 09:17:31,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:17:31,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash -811115394, now seen corresponding path program 10 times [2022-07-21 09:17:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:31,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456572783] [2022-07-21 09:17:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:31,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:31,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:31,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456572783] [2022-07-21 09:17:31,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456572783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:31,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:31,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:17:31,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753784344] [2022-07-21 09:17:31,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:31,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:17:31,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:31,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:17:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:17:31,508 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:31,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 244 transitions, 1891 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:31,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:31,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:31,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:32,690 INFO L129 PetriNetUnfolder]: 261/745 cut-off events. [2022-07-21 09:17:32,690 INFO L130 PetriNetUnfolder]: For 3276/3276 co-relation queries the response was YES. [2022-07-21 09:17:32,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 745 events. 261/745 cut-off events. For 3276/3276 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3786 event pairs, 24 based on Foata normal form. 1/744 useless extension candidates. Maximal degree in co-relation 3521. Up to 477 conditions per place. [2022-07-21 09:17:32,698 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 78 changer transitions 32/287 dead transitions. [2022-07-21 09:17:32,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 287 transitions, 2626 flow [2022-07-21 09:17:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:17:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 09:17:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2022-07-21 09:17:32,701 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2022-07-21 09:17:32,702 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2022-07-21 09:17:32,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2022-07-21 09:17:32,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:32,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2022-07-21 09:17:32,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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) [2022-07-21 09:17:32,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:17:32,707 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:17:32,707 INFO L186 Difference]: Start difference. First operand has 273 places, 244 transitions, 1891 flow. Second operand 33 states and 1745 transitions. [2022-07-21 09:17:32,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 287 transitions, 2626 flow [2022-07-21 09:17:32,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 287 transitions, 2308 flow, removed 96 selfloop flow, removed 27 redundant places. [2022-07-21 09:17:32,727 INFO L242 Difference]: Finished difference. Result has 280 places, 241 transitions, 1804 flow [2022-07-21 09:17:32,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1804, PETRI_PLACES=280, PETRI_TRANSITIONS=241} [2022-07-21 09:17:32,728 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 192 predicate places. [2022-07-21 09:17:32,729 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 241 transitions, 1804 flow [2022-07-21 09:17:32,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:32,729 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:32,729 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] [2022-07-21 09:17:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:17:32,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:32,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1115730886, now seen corresponding path program 11 times [2022-07-21 09:17:32,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:32,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627895456] [2022-07-21 09:17:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:32,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:33,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627895456] [2022-07-21 09:17:33,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627895456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:33,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:33,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:17:33,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727118687] [2022-07-21 09:17:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:33,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:17:33,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:17:33,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:17:33,084 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:33,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 241 transitions, 1804 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:33,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:33,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:33,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:34,084 INFO L129 PetriNetUnfolder]: 251/701 cut-off events. [2022-07-21 09:17:34,084 INFO L130 PetriNetUnfolder]: For 2886/2886 co-relation queries the response was YES. [2022-07-21 09:17:34,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 701 events. 251/701 cut-off events. For 2886/2886 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3438 event pairs, 23 based on Foata normal form. 1/700 useless extension candidates. Maximal degree in co-relation 3347. Up to 465 conditions per place. [2022-07-21 09:17:34,091 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 134 selfloop transitions, 75 changer transitions 26/274 dead transitions. [2022-07-21 09:17:34,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 274 transitions, 2427 flow [2022-07-21 09:17:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:17:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:17:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2022-07-21 09:17:34,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2022-07-21 09:17:34,093 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2022-07-21 09:17:34,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2022-07-21 09:17:34,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:34,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2022-07-21 09:17:34,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 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) [2022-07-21 09:17:34,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:34,098 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:34,098 INFO L186 Difference]: Start difference. First operand has 280 places, 241 transitions, 1804 flow. Second operand 31 states and 1639 transitions. [2022-07-21 09:17:34,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 274 transitions, 2427 flow [2022-07-21 09:17:34,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 274 transitions, 2189 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-07-21 09:17:34,114 INFO L242 Difference]: Finished difference. Result has 274 places, 234 transitions, 1729 flow [2022-07-21 09:17:34,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1729, PETRI_PLACES=274, PETRI_TRANSITIONS=234} [2022-07-21 09:17:34,115 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 186 predicate places. [2022-07-21 09:17:34,115 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 234 transitions, 1729 flow [2022-07-21 09:17:34,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:34,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:34,116 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] [2022-07-21 09:17:34,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:17:34,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1030533186, now seen corresponding path program 12 times [2022-07-21 09:17:34,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547569448] [2022-07-21 09:17:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:34,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:34,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547569448] [2022-07-21 09:17:34,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547569448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:34,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:34,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:17:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592250894] [2022-07-21 09:17:34,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:17:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:17:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:17:34,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:34,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 234 transitions, 1729 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:34,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:34,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:34,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:35,537 INFO L129 PetriNetUnfolder]: 244/700 cut-off events. [2022-07-21 09:17:35,537 INFO L130 PetriNetUnfolder]: For 2595/2595 co-relation queries the response was YES. [2022-07-21 09:17:35,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 700 events. 244/700 cut-off events. For 2595/2595 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3374 event pairs, 32 based on Foata normal form. 1/700 useless extension candidates. Maximal degree in co-relation 3212. Up to 460 conditions per place. [2022-07-21 09:17:35,544 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 130 selfloop transitions, 75 changer transitions 19/263 dead transitions. [2022-07-21 09:17:35,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 263 transitions, 2301 flow [2022-07-21 09:17:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:17:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:17:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1633 transitions. [2022-07-21 09:17:35,546 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.560398078242965 [2022-07-21 09:17:35,546 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1633 transitions. [2022-07-21 09:17:35,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1633 transitions. [2022-07-21 09:17:35,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:35,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1633 transitions. [2022-07-21 09:17:35,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.67741935483871) internal successors, (1633), 31 states have internal predecessors, (1633), 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) [2022-07-21 09:17:35,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:35,551 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:35,552 INFO L186 Difference]: Start difference. First operand has 274 places, 234 transitions, 1729 flow. Second operand 31 states and 1633 transitions. [2022-07-21 09:17:35,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 263 transitions, 2301 flow [2022-07-21 09:17:35,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 263 transitions, 2097 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-07-21 09:17:35,566 INFO L242 Difference]: Finished difference. Result has 267 places, 231 transitions, 1700 flow [2022-07-21 09:17:35,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1700, PETRI_PLACES=267, PETRI_TRANSITIONS=231} [2022-07-21 09:17:35,567 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 179 predicate places. [2022-07-21 09:17:35,567 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 231 transitions, 1700 flow [2022-07-21 09:17:35,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:35,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:35,568 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] [2022-07-21 09:17:35,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 09:17:35,568 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1360263200, now seen corresponding path program 13 times [2022-07-21 09:17:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:35,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057249136] [2022-07-21 09:17:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:35,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:35,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:35,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057249136] [2022-07-21 09:17:35,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057249136] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:35,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:35,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:17:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436484733] [2022-07-21 09:17:35,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:17:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:17:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:17:35,952 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:35,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 231 transitions, 1700 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:17:35,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:35,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:35,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:37,511 INFO L129 PetriNetUnfolder]: 238/683 cut-off events. [2022-07-21 09:17:37,511 INFO L130 PetriNetUnfolder]: For 2350/2350 co-relation queries the response was YES. [2022-07-21 09:17:37,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 683 events. 238/683 cut-off events. For 2350/2350 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3213 event pairs, 35 based on Foata normal form. 1/682 useless extension candidates. Maximal degree in co-relation 3101. Up to 452 conditions per place. [2022-07-21 09:17:37,518 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 123 selfloop transitions, 65 changer transitions 26/253 dead transitions. [2022-07-21 09:17:37,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 253 transitions, 2225 flow [2022-07-21 09:17:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:17:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:17:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1677 transitions. [2022-07-21 09:17:37,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5575132978723404 [2022-07-21 09:17:37,520 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1677 transitions. [2022-07-21 09:17:37,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1677 transitions. [2022-07-21 09:17:37,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:37,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1677 transitions. [2022-07-21 09:17:37,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.40625) internal successors, (1677), 32 states have internal predecessors, (1677), 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) [2022-07-21 09:17:37,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:37,528 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:37,528 INFO L186 Difference]: Start difference. First operand has 267 places, 231 transitions, 1700 flow. Second operand 32 states and 1677 transitions. [2022-07-21 09:17:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 253 transitions, 2225 flow [2022-07-21 09:17:37,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 2037 flow, removed 9 selfloop flow, removed 31 redundant places. [2022-07-21 09:17:37,557 INFO L242 Difference]: Finished difference. Result has 264 places, 215 transitions, 1558 flow [2022-07-21 09:17:37,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1558, PETRI_PLACES=264, PETRI_TRANSITIONS=215} [2022-07-21 09:17:37,558 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 176 predicate places. [2022-07-21 09:17:37,558 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 215 transitions, 1558 flow [2022-07-21 09:17:37,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:17:37,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:37,559 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] [2022-07-21 09:17:37,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 09:17:37,559 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1690499486, now seen corresponding path program 14 times [2022-07-21 09:17:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997592137] [2022-07-21 09:17:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:37,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:37,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997592137] [2022-07-21 09:17:37,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997592137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:37,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:37,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:17:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231910508] [2022-07-21 09:17:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:37,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:17:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:17:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:17:37,898 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:37,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 215 transitions, 1558 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:37,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:37,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:37,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:38,999 INFO L129 PetriNetUnfolder]: 260/745 cut-off events. [2022-07-21 09:17:38,999 INFO L130 PetriNetUnfolder]: For 2570/2570 co-relation queries the response was YES. [2022-07-21 09:17:39,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 745 events. 260/745 cut-off events. For 2570/2570 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3759 event pairs, 37 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3287. Up to 436 conditions per place. [2022-07-21 09:17:39,006 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 83 changer transitions 42/284 dead transitions. [2022-07-21 09:17:39,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 284 transitions, 2512 flow [2022-07-21 09:17:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:17:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:17:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2022-07-21 09:17:39,009 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2022-07-21 09:17:39,009 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2022-07-21 09:17:39,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2022-07-21 09:17:39,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:39,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2022-07-21 09:17:39,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 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) [2022-07-21 09:17:39,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:17:39,014 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:17:39,014 INFO L186 Difference]: Start difference. First operand has 264 places, 215 transitions, 1558 flow. Second operand 35 states and 1861 transitions. [2022-07-21 09:17:39,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 284 transitions, 2512 flow [2022-07-21 09:17:39,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 284 transitions, 2221 flow, removed 45 selfloop flow, removed 29 redundant places. [2022-07-21 09:17:39,028 INFO L242 Difference]: Finished difference. Result has 256 places, 224 transitions, 1654 flow [2022-07-21 09:17:39,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1654, PETRI_PLACES=256, PETRI_TRANSITIONS=224} [2022-07-21 09:17:39,029 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2022-07-21 09:17:39,029 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 224 transitions, 1654 flow [2022-07-21 09:17:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:39,029 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:39,030 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] [2022-07-21 09:17:39,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:17:39,030 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1409575526, now seen corresponding path program 15 times [2022-07-21 09:17:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:39,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649784587] [2022-07-21 09:17:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:39,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649784587] [2022-07-21 09:17:39,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649784587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:39,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:39,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:39,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844346414] [2022-07-21 09:17:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:39,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:39,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:39,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:39,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 224 transitions, 1654 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:39,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:39,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:39,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:40,409 INFO L129 PetriNetUnfolder]: 272/762 cut-off events. [2022-07-21 09:17:40,409 INFO L130 PetriNetUnfolder]: For 3705/3705 co-relation queries the response was YES. [2022-07-21 09:17:40,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3673 conditions, 762 events. 272/762 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3719 event pairs, 23 based on Foata normal form. 1/760 useless extension candidates. Maximal degree in co-relation 3596. Up to 458 conditions per place. [2022-07-21 09:17:40,417 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 101 changer transitions 22/300 dead transitions. [2022-07-21 09:17:40,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 300 transitions, 2850 flow [2022-07-21 09:17:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:17:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:17:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1818 transitions. [2022-07-21 09:17:40,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5688360450563203 [2022-07-21 09:17:40,419 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1818 transitions. [2022-07-21 09:17:40,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1818 transitions. [2022-07-21 09:17:40,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:40,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1818 transitions. [2022-07-21 09:17:40,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.470588235294116) internal successors, (1818), 34 states have internal predecessors, (1818), 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) [2022-07-21 09:17:40,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:17:40,424 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:17:40,424 INFO L186 Difference]: Start difference. First operand has 256 places, 224 transitions, 1654 flow. Second operand 34 states and 1818 transitions. [2022-07-21 09:17:40,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 300 transitions, 2850 flow [2022-07-21 09:17:40,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 300 transitions, 2572 flow, removed 73 selfloop flow, removed 29 redundant places. [2022-07-21 09:17:40,446 INFO L242 Difference]: Finished difference. Result has 260 places, 251 transitions, 2016 flow [2022-07-21 09:17:40,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2016, PETRI_PLACES=260, PETRI_TRANSITIONS=251} [2022-07-21 09:17:40,447 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 172 predicate places. [2022-07-21 09:17:40,447 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 251 transitions, 2016 flow [2022-07-21 09:17:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:40,447 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:40,447 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] [2022-07-21 09:17:40,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:17:40,448 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2084111022, now seen corresponding path program 16 times [2022-07-21 09:17:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:40,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334888503] [2022-07-21 09:17:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:40,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:40,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:40,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334888503] [2022-07-21 09:17:40,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334888503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:40,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:40,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 09:17:40,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186757476] [2022-07-21 09:17:40,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:40,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:17:40,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:17:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:17:40,756 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:40,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 251 transitions, 2016 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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) [2022-07-21 09:17:40,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:40,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:40,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:41,724 INFO L129 PetriNetUnfolder]: 280/785 cut-off events. [2022-07-21 09:17:41,724 INFO L130 PetriNetUnfolder]: For 3938/3938 co-relation queries the response was YES. [2022-07-21 09:17:41,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 785 events. 280/785 cut-off events. For 3938/3938 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3937 event pairs, 25 based on Foata normal form. 1/783 useless extension candidates. Maximal degree in co-relation 3839. Up to 487 conditions per place. [2022-07-21 09:17:41,731 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 89 changer transitions 29/308 dead transitions. [2022-07-21 09:17:41,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 308 transitions, 3040 flow [2022-07-21 09:17:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 09:17:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-21 09:17:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1560 transitions. [2022-07-21 09:17:41,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5722670579603815 [2022-07-21 09:17:41,733 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1560 transitions. [2022-07-21 09:17:41,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1560 transitions. [2022-07-21 09:17:41,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:41,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1560 transitions. [2022-07-21 09:17:41,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.793103448275865) internal successors, (1560), 29 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:41,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 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) [2022-07-21 09:17:41,737 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 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) [2022-07-21 09:17:41,737 INFO L186 Difference]: Start difference. First operand has 260 places, 251 transitions, 2016 flow. Second operand 29 states and 1560 transitions. [2022-07-21 09:17:41,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 308 transitions, 3040 flow [2022-07-21 09:17:41,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 308 transitions, 2719 flow, removed 122 selfloop flow, removed 14 redundant places. [2022-07-21 09:17:41,756 INFO L242 Difference]: Finished difference. Result has 278 places, 259 transitions, 2077 flow [2022-07-21 09:17:41,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2077, PETRI_PLACES=278, PETRI_TRANSITIONS=259} [2022-07-21 09:17:41,756 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 190 predicate places. [2022-07-21 09:17:41,757 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 259 transitions, 2077 flow [2022-07-21 09:17:41,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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) [2022-07-21 09:17:41,757 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:41,757 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] [2022-07-21 09:17:41,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 09:17:41,757 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2051877010, now seen corresponding path program 17 times [2022-07-21 09:17:41,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:41,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447385309] [2022-07-21 09:17:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:42,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:42,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447385309] [2022-07-21 09:17:42,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447385309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:42,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:42,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:42,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643504400] [2022-07-21 09:17:42,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:42,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:42,012 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:42,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 259 transitions, 2077 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:42,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:42,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:42,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:43,016 INFO L129 PetriNetUnfolder]: 278/784 cut-off events. [2022-07-21 09:17:43,016 INFO L130 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-07-21 09:17:43,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 784 events. 278/784 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3955 event pairs, 25 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 3914. Up to 483 conditions per place. [2022-07-21 09:17:43,026 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 149 selfloop transitions, 85 changer transitions 35/308 dead transitions. [2022-07-21 09:17:43,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 308 transitions, 3007 flow [2022-07-21 09:17:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:17:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:17:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2022-07-21 09:17:43,029 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2022-07-21 09:17:43,029 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2022-07-21 09:17:43,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2022-07-21 09:17:43,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:43,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2022-07-21 09:17:43,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 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) [2022-07-21 09:17:43,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:43,036 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:43,036 INFO L186 Difference]: Start difference. First operand has 278 places, 259 transitions, 2077 flow. Second operand 31 states and 1658 transitions. [2022-07-21 09:17:43,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 308 transitions, 3007 flow [2022-07-21 09:17:43,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 308 transitions, 2721 flow, removed 64 selfloop flow, removed 27 redundant places. [2022-07-21 09:17:43,068 INFO L242 Difference]: Finished difference. Result has 286 places, 256 transitions, 2053 flow [2022-07-21 09:17:43,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2053, PETRI_PLACES=286, PETRI_TRANSITIONS=256} [2022-07-21 09:17:43,068 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2022-07-21 09:17:43,069 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 256 transitions, 2053 flow [2022-07-21 09:17:43,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:43,069 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:43,069 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] [2022-07-21 09:17:43,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:17:43,069 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1422442310, now seen corresponding path program 18 times [2022-07-21 09:17:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:43,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761971660] [2022-07-21 09:17:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:43,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761971660] [2022-07-21 09:17:43,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761971660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:43,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:43,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:43,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140196304] [2022-07-21 09:17:43,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:43,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:43,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:43,354 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:43,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 256 transitions, 2053 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:43,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:43,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:43,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:44,340 INFO L129 PetriNetUnfolder]: 274/768 cut-off events. [2022-07-21 09:17:44,340 INFO L130 PetriNetUnfolder]: For 3941/3941 co-relation queries the response was YES. [2022-07-21 09:17:44,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 768 events. 274/768 cut-off events. For 3941/3941 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3832 event pairs, 24 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3868. Up to 481 conditions per place. [2022-07-21 09:17:44,347 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 147 selfloop transitions, 92 changer transitions 26/304 dead transitions. [2022-07-21 09:17:44,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 304 transitions, 2973 flow [2022-07-21 09:17:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:17:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:17:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1606 transitions. [2022-07-21 09:17:44,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5695035460992908 [2022-07-21 09:17:44,350 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1606 transitions. [2022-07-21 09:17:44,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1606 transitions. [2022-07-21 09:17:44,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:44,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1606 transitions. [2022-07-21 09:17:44,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.53333333333333) internal successors, (1606), 30 states have internal predecessors, (1606), 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) [2022-07-21 09:17:44,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:44,354 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:44,354 INFO L186 Difference]: Start difference. First operand has 286 places, 256 transitions, 2053 flow. Second operand 30 states and 1606 transitions. [2022-07-21 09:17:44,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 304 transitions, 2973 flow [2022-07-21 09:17:44,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 2719 flow, removed 24 selfloop flow, removed 28 redundant places. [2022-07-21 09:17:44,375 INFO L242 Difference]: Finished difference. Result has 286 places, 259 transitions, 2104 flow [2022-07-21 09:17:44,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2104, PETRI_PLACES=286, PETRI_TRANSITIONS=259} [2022-07-21 09:17:44,376 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2022-07-21 09:17:44,376 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 259 transitions, 2104 flow [2022-07-21 09:17:44,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:44,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:44,376 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] [2022-07-21 09:17:44,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:17:44,377 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2093389318, now seen corresponding path program 19 times [2022-07-21 09:17:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:44,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766287577] [2022-07-21 09:17:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:44,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:44,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:44,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766287577] [2022-07-21 09:17:44,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766287577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:44,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:44,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:44,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85903653] [2022-07-21 09:17:44,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:44,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:44,666 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:44,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 259 transitions, 2104 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:44,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:44,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:44,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:45,645 INFO L129 PetriNetUnfolder]: 280/787 cut-off events. [2022-07-21 09:17:45,646 INFO L130 PetriNetUnfolder]: For 4356/4356 co-relation queries the response was YES. [2022-07-21 09:17:45,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 787 events. 280/787 cut-off events. For 4356/4356 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3990 event pairs, 26 based on Foata normal form. 1/784 useless extension candidates. Maximal degree in co-relation 4008. Up to 511 conditions per place. [2022-07-21 09:17:45,653 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 78 changer transitions 30/312 dead transitions. [2022-07-21 09:17:45,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 312 transitions, 3125 flow [2022-07-21 09:17:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:17:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:17:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1651 transitions. [2022-07-21 09:17:45,655 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5665751544269046 [2022-07-21 09:17:45,655 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1651 transitions. [2022-07-21 09:17:45,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1651 transitions. [2022-07-21 09:17:45,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:45,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1651 transitions. [2022-07-21 09:17:45,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.25806451612903) internal successors, (1651), 31 states have internal predecessors, (1651), 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) [2022-07-21 09:17:45,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:45,659 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:45,659 INFO L186 Difference]: Start difference. First operand has 286 places, 259 transitions, 2104 flow. Second operand 31 states and 1651 transitions. [2022-07-21 09:17:45,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 312 transitions, 3125 flow [2022-07-21 09:17:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 312 transitions, 2890 flow, removed 47 selfloop flow, removed 26 redundant places. [2022-07-21 09:17:45,680 INFO L242 Difference]: Finished difference. Result has 297 places, 266 transitions, 2244 flow [2022-07-21 09:17:45,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2244, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2022-07-21 09:17:45,681 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2022-07-21 09:17:45,681 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 2244 flow [2022-07-21 09:17:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:45,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:45,681 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] [2022-07-21 09:17:45,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:17:45,682 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1511959520, now seen corresponding path program 20 times [2022-07-21 09:17:45,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:45,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124464891] [2022-07-21 09:17:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:45,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:45,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124464891] [2022-07-21 09:17:45,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124464891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:45,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:45,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:17:45,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693464020] [2022-07-21 09:17:45,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:45,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:17:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:17:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:17:45,982 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:45,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 2244 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:45,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:45,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:45,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:47,038 INFO L129 PetriNetUnfolder]: 278/791 cut-off events. [2022-07-21 09:17:47,039 INFO L130 PetriNetUnfolder]: For 4509/4509 co-relation queries the response was YES. [2022-07-21 09:17:47,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 791 events. 278/791 cut-off events. For 4509/4509 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4047 event pairs, 23 based on Foata normal form. 1/789 useless extension candidates. Maximal degree in co-relation 4069. Up to 503 conditions per place. [2022-07-21 09:17:47,045 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 155 selfloop transitions, 86 changer transitions 30/310 dead transitions. [2022-07-21 09:17:47,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 310 transitions, 3174 flow [2022-07-21 09:17:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:17:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:17:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1701 transitions. [2022-07-21 09:17:47,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5654920212765957 [2022-07-21 09:17:47,047 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1701 transitions. [2022-07-21 09:17:47,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1701 transitions. [2022-07-21 09:17:47,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:47,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1701 transitions. [2022-07-21 09:17:47,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.15625) internal successors, (1701), 32 states have internal predecessors, (1701), 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) [2022-07-21 09:17:47,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:47,052 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:47,052 INFO L186 Difference]: Start difference. First operand has 297 places, 266 transitions, 2244 flow. Second operand 32 states and 1701 transitions. [2022-07-21 09:17:47,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 310 transitions, 3174 flow [2022-07-21 09:17:47,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 310 transitions, 2977 flow, removed 39 selfloop flow, removed 26 redundant places. [2022-07-21 09:17:47,075 INFO L242 Difference]: Finished difference. Result has 304 places, 264 transitions, 2304 flow [2022-07-21 09:17:47,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2304, PETRI_PLACES=304, PETRI_TRANSITIONS=264} [2022-07-21 09:17:47,076 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 216 predicate places. [2022-07-21 09:17:47,076 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 264 transitions, 2304 flow [2022-07-21 09:17:47,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:47,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:47,076 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] [2022-07-21 09:17:47,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:17:47,077 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash -462340898, now seen corresponding path program 21 times [2022-07-21 09:17:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:47,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238417964] [2022-07-21 09:17:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:47,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:47,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238417964] [2022-07-21 09:17:47,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238417964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:47,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:47,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:47,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733054711] [2022-07-21 09:17:47,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:47,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:47,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:47,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:47,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 264 transitions, 2304 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:47,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:47,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:47,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:48,359 INFO L129 PetriNetUnfolder]: 274/774 cut-off events. [2022-07-21 09:17:48,359 INFO L130 PetriNetUnfolder]: For 4679/4679 co-relation queries the response was YES. [2022-07-21 09:17:48,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 774 events. 274/774 cut-off events. For 4679/4679 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3863 event pairs, 21 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 4077. Up to 472 conditions per place. [2022-07-21 09:17:48,366 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 98 changer transitions 26/314 dead transitions. [2022-07-21 09:17:48,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 314 transitions, 3258 flow [2022-07-21 09:17:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:17:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:17:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1659 transitions. [2022-07-21 09:17:48,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5693205216197667 [2022-07-21 09:17:48,368 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1659 transitions. [2022-07-21 09:17:48,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1659 transitions. [2022-07-21 09:17:48,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:48,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1659 transitions. [2022-07-21 09:17:48,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.516129032258064) internal successors, (1659), 31 states have internal predecessors, (1659), 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) [2022-07-21 09:17:48,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:48,373 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:17:48,373 INFO L186 Difference]: Start difference. First operand has 304 places, 264 transitions, 2304 flow. Second operand 31 states and 1659 transitions. [2022-07-21 09:17:48,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 314 transitions, 3258 flow [2022-07-21 09:17:48,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 314 transitions, 3017 flow, removed 49 selfloop flow, removed 30 redundant places. [2022-07-21 09:17:48,398 INFO L242 Difference]: Finished difference. Result has 305 places, 267 transitions, 2388 flow [2022-07-21 09:17:48,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2388, PETRI_PLACES=305, PETRI_TRANSITIONS=267} [2022-07-21 09:17:48,399 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 217 predicate places. [2022-07-21 09:17:48,399 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 267 transitions, 2388 flow [2022-07-21 09:17:48,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:48,399 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:48,399 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] [2022-07-21 09:17:48,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 09:17:48,400 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:48,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1766688790, now seen corresponding path program 22 times [2022-07-21 09:17:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:48,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162949979] [2022-07-21 09:17:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:48,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:48,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:48,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162949979] [2022-07-21 09:17:48,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162949979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:48,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:48,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:17:48,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022234725] [2022-07-21 09:17:48,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:48,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:17:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:17:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:17:48,699 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:48,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 267 transitions, 2388 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:48,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:48,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:48,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:49,864 INFO L129 PetriNetUnfolder]: 275/781 cut-off events. [2022-07-21 09:17:49,865 INFO L130 PetriNetUnfolder]: For 4192/4192 co-relation queries the response was YES. [2022-07-21 09:17:49,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 781 events. 275/781 cut-off events. For 4192/4192 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3918 event pairs, 22 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 4138. Up to 505 conditions per place. [2022-07-21 09:17:49,871 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 159 selfloop transitions, 91 changer transitions 22/311 dead transitions. [2022-07-21 09:17:49,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 311 transitions, 3282 flow [2022-07-21 09:17:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:17:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:17:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1798 transitions. [2022-07-21 09:17:49,885 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5625782227784731 [2022-07-21 09:17:49,885 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1798 transitions. [2022-07-21 09:17:49,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1798 transitions. [2022-07-21 09:17:49,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:49,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1798 transitions. [2022-07-21 09:17:49,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.88235294117647) internal successors, (1798), 34 states have internal predecessors, (1798), 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) [2022-07-21 09:17:49,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:17:49,889 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:17:49,889 INFO L186 Difference]: Start difference. First operand has 305 places, 267 transitions, 2388 flow. Second operand 34 states and 1798 transitions. [2022-07-21 09:17:49,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 311 transitions, 3282 flow [2022-07-21 09:17:49,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 311 transitions, 3014 flow, removed 32 selfloop flow, removed 28 redundant places. [2022-07-21 09:17:49,913 INFO L242 Difference]: Finished difference. Result has 313 places, 272 transitions, 2453 flow [2022-07-21 09:17:49,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2453, PETRI_PLACES=313, PETRI_TRANSITIONS=272} [2022-07-21 09:17:49,914 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 225 predicate places. [2022-07-21 09:17:49,914 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 272 transitions, 2453 flow [2022-07-21 09:17:49,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:49,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:49,914 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] [2022-07-21 09:17:49,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 09:17:49,915 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1582155802, now seen corresponding path program 23 times [2022-07-21 09:17:49,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:49,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214949132] [2022-07-21 09:17:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:49,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:50,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:50,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214949132] [2022-07-21 09:17:50,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214949132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:50,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:50,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887045331] [2022-07-21 09:17:50,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:50,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:50,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:50,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 272 transitions, 2453 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:50,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:50,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:50,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:51,464 INFO L129 PetriNetUnfolder]: 276/788 cut-off events. [2022-07-21 09:17:51,464 INFO L130 PetriNetUnfolder]: For 4695/4695 co-relation queries the response was YES. [2022-07-21 09:17:51,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4329 conditions, 788 events. 276/788 cut-off events. For 4695/4695 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4005 event pairs, 18 based on Foata normal form. 1/787 useless extension candidates. Maximal degree in co-relation 4234. Up to 503 conditions per place. [2022-07-21 09:17:51,472 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 161 selfloop transitions, 98 changer transitions 21/319 dead transitions. [2022-07-21 09:17:51,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 319 transitions, 3414 flow [2022-07-21 09:17:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:17:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:17:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1706 transitions. [2022-07-21 09:17:51,485 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.567154255319149 [2022-07-21 09:17:51,485 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1706 transitions. [2022-07-21 09:17:51,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1706 transitions. [2022-07-21 09:17:51,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:51,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1706 transitions. [2022-07-21 09:17:51,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.3125) internal successors, (1706), 32 states have internal predecessors, (1706), 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) [2022-07-21 09:17:51,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:51,489 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:51,489 INFO L186 Difference]: Start difference. First operand has 313 places, 272 transitions, 2453 flow. Second operand 32 states and 1706 transitions. [2022-07-21 09:17:51,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 319 transitions, 3414 flow [2022-07-21 09:17:51,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 319 transitions, 3211 flow, removed 37 selfloop flow, removed 27 redundant places. [2022-07-21 09:17:51,516 INFO L242 Difference]: Finished difference. Result has 322 places, 278 transitions, 2613 flow [2022-07-21 09:17:51,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2613, PETRI_PLACES=322, PETRI_TRANSITIONS=278} [2022-07-21 09:17:51,517 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 234 predicate places. [2022-07-21 09:17:51,517 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 278 transitions, 2613 flow [2022-07-21 09:17:51,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:51,518 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:51,518 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] [2022-07-21 09:17:51,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 09:17:51,518 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1449125434, now seen corresponding path program 24 times [2022-07-21 09:17:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:51,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224325116] [2022-07-21 09:17:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:51,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224325116] [2022-07-21 09:17:51,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224325116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:51,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:51,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:17:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649253699] [2022-07-21 09:17:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:51,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:17:51,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:17:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:17:51,807 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:51,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 278 transitions, 2613 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:51,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:51,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:51,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:53,086 INFO L129 PetriNetUnfolder]: 269/789 cut-off events. [2022-07-21 09:17:53,087 INFO L130 PetriNetUnfolder]: For 4915/4915 co-relation queries the response was YES. [2022-07-21 09:17:53,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4392 conditions, 789 events. 269/789 cut-off events. For 4915/4915 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4030 event pairs, 22 based on Foata normal form. 1/787 useless extension candidates. Maximal degree in co-relation 4291. Up to 507 conditions per place. [2022-07-21 09:17:53,095 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 162 selfloop transitions, 92 changer transitions 18/311 dead transitions. [2022-07-21 09:17:53,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 311 transitions, 3355 flow [2022-07-21 09:17:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:17:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:17:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1597 transitions. [2022-07-21 09:17:53,097 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5663120567375887 [2022-07-21 09:17:53,097 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1597 transitions. [2022-07-21 09:17:53,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1597 transitions. [2022-07-21 09:17:53,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:53,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1597 transitions. [2022-07-21 09:17:53,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.233333333333334) internal successors, (1597), 30 states have internal predecessors, (1597), 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) [2022-07-21 09:17:53,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:53,101 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:17:53,101 INFO L186 Difference]: Start difference. First operand has 322 places, 278 transitions, 2613 flow. Second operand 30 states and 1597 transitions. [2022-07-21 09:17:53,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 311 transitions, 3355 flow [2022-07-21 09:17:53,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 311 transitions, 3165 flow, removed 32 selfloop flow, removed 25 redundant places. [2022-07-21 09:17:53,133 INFO L242 Difference]: Finished difference. Result has 327 places, 275 transitions, 2626 flow [2022-07-21 09:17:53,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2626, PETRI_PLACES=327, PETRI_TRANSITIONS=275} [2022-07-21 09:17:53,133 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 239 predicate places. [2022-07-21 09:17:53,134 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 275 transitions, 2626 flow [2022-07-21 09:17:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:17:53,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:53,134 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] [2022-07-21 09:17:53,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 09:17:53,134 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:53,135 INFO L85 PathProgramCache]: Analyzing trace with hash -771716962, now seen corresponding path program 25 times [2022-07-21 09:17:53,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:53,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949788113] [2022-07-21 09:17:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:53,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:53,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949788113] [2022-07-21 09:17:53,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949788113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:53,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:53,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:17:53,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239874211] [2022-07-21 09:17:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:53,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:17:53,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:17:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:17:53,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:53,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 275 transitions, 2626 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:53,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:53,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:53,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:55,066 INFO L129 PetriNetUnfolder]: 275/790 cut-off events. [2022-07-21 09:17:55,066 INFO L130 PetriNetUnfolder]: For 5300/5300 co-relation queries the response was YES. [2022-07-21 09:17:55,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4565 conditions, 790 events. 275/790 cut-off events. For 5300/5300 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4016 event pairs, 21 based on Foata normal form. 1/787 useless extension candidates. Maximal degree in co-relation 4462. Up to 498 conditions per place. [2022-07-21 09:17:55,074 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 156 selfloop transitions, 105 changer transitions 21/321 dead transitions. [2022-07-21 09:17:55,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 321 transitions, 3615 flow [2022-07-21 09:17:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:17:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 09:17:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1756 transitions. [2022-07-21 09:17:55,085 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.56608639587363 [2022-07-21 09:17:55,085 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1756 transitions. [2022-07-21 09:17:55,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1756 transitions. [2022-07-21 09:17:55,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:55,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1756 transitions. [2022-07-21 09:17:55,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.21212121212121) internal successors, (1756), 33 states have internal predecessors, (1756), 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) [2022-07-21 09:17:55,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:17:55,089 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:17:55,089 INFO L186 Difference]: Start difference. First operand has 327 places, 275 transitions, 2626 flow. Second operand 33 states and 1756 transitions. [2022-07-21 09:17:55,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 321 transitions, 3615 flow [2022-07-21 09:17:55,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 321 transitions, 3349 flow, removed 21 selfloop flow, removed 31 redundant places. [2022-07-21 09:17:55,119 INFO L242 Difference]: Finished difference. Result has 331 places, 280 transitions, 2745 flow [2022-07-21 09:17:55,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2745, PETRI_PLACES=331, PETRI_TRANSITIONS=280} [2022-07-21 09:17:55,120 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 243 predicate places. [2022-07-21 09:17:55,120 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 280 transitions, 2745 flow [2022-07-21 09:17:55,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:55,121 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:55,121 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] [2022-07-21 09:17:55,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 09:17:55,121 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1151247688, now seen corresponding path program 26 times [2022-07-21 09:17:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943574202] [2022-07-21 09:17:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:55,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943574202] [2022-07-21 09:17:55,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943574202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:55,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:55,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:17:55,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768022074] [2022-07-21 09:17:55,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:55,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:17:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:17:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:17:55,458 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:55,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 280 transitions, 2745 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:55,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:55,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:55,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:56,650 INFO L129 PetriNetUnfolder]: 268/779 cut-off events. [2022-07-21 09:17:56,650 INFO L130 PetriNetUnfolder]: For 5642/5642 co-relation queries the response was YES. [2022-07-21 09:17:56,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4563 conditions, 779 events. 268/779 cut-off events. For 5642/5642 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4011 event pairs, 20 based on Foata normal form. 1/776 useless extension candidates. Maximal degree in co-relation 4457. Up to 522 conditions per place. [2022-07-21 09:17:56,662 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 168 selfloop transitions, 82 changer transitions 21/310 dead transitions. [2022-07-21 09:17:56,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 310 transitions, 3465 flow [2022-07-21 09:17:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:17:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:17:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1689 transitions. [2022-07-21 09:17:56,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5615026595744681 [2022-07-21 09:17:56,664 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1689 transitions. [2022-07-21 09:17:56,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1689 transitions. [2022-07-21 09:17:56,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:56,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1689 transitions. [2022-07-21 09:17:56,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.78125) internal successors, (1689), 32 states have internal predecessors, (1689), 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) [2022-07-21 09:17:56,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:56,668 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:17:56,668 INFO L186 Difference]: Start difference. First operand has 331 places, 280 transitions, 2745 flow. Second operand 32 states and 1689 transitions. [2022-07-21 09:17:56,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 310 transitions, 3465 flow [2022-07-21 09:17:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 310 transitions, 3251 flow, removed 42 selfloop flow, removed 26 redundant places. [2022-07-21 09:17:56,700 INFO L242 Difference]: Finished difference. Result has 337 places, 274 transitions, 2648 flow [2022-07-21 09:17:56,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2648, PETRI_PLACES=337, PETRI_TRANSITIONS=274} [2022-07-21 09:17:56,701 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 249 predicate places. [2022-07-21 09:17:56,701 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 274 transitions, 2648 flow [2022-07-21 09:17:56,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:17:56,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:56,702 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] [2022-07-21 09:17:56,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 09:17:56,703 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1179211540, now seen corresponding path program 27 times [2022-07-21 09:17:56,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:56,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366576381] [2022-07-21 09:17:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:56,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:57,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:57,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366576381] [2022-07-21 09:17:57,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366576381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:57,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:57,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:17:57,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360772360] [2022-07-21 09:17:57,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:57,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:17:57,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:57,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:17:57,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:17:57,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:57,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 274 transitions, 2648 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:17:57,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:57,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:57,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:58,959 INFO L129 PetriNetUnfolder]: 263/763 cut-off events. [2022-07-21 09:17:58,960 INFO L130 PetriNetUnfolder]: For 5128/5128 co-relation queries the response was YES. [2022-07-21 09:17:58,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 763 events. 263/763 cut-off events. For 5128/5128 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3837 event pairs, 22 based on Foata normal form. 1/760 useless extension candidates. Maximal degree in co-relation 4354. Up to 514 conditions per place. [2022-07-21 09:17:58,968 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 84 changer transitions 17/305 dead transitions. [2022-07-21 09:17:58,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 305 transitions, 3420 flow [2022-07-21 09:17:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:17:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:17:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1837 transitions. [2022-07-21 09:17:58,980 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5583586626139818 [2022-07-21 09:17:58,980 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1837 transitions. [2022-07-21 09:17:58,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1837 transitions. [2022-07-21 09:17:58,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:58,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1837 transitions. [2022-07-21 09:17:58,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.48571428571429) internal successors, (1837), 35 states have internal predecessors, (1837), 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) [2022-07-21 09:17:58,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:17:58,984 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:17:58,984 INFO L186 Difference]: Start difference. First operand has 337 places, 274 transitions, 2648 flow. Second operand 35 states and 1837 transitions. [2022-07-21 09:17:58,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 305 transitions, 3420 flow [2022-07-21 09:17:59,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 305 transitions, 3109 flow, removed 18 selfloop flow, removed 36 redundant places. [2022-07-21 09:17:59,040 INFO L242 Difference]: Finished difference. Result has 334 places, 273 transitions, 2558 flow [2022-07-21 09:17:59,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2558, PETRI_PLACES=334, PETRI_TRANSITIONS=273} [2022-07-21 09:17:59,041 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 246 predicate places. [2022-07-21 09:17:59,041 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 273 transitions, 2558 flow [2022-07-21 09:17:59,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:17:59,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:59,041 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] [2022-07-21 09:17:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 09:17:59,042 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1837290896, now seen corresponding path program 28 times [2022-07-21 09:17:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520584242] [2022-07-21 09:17:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:59,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:59,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520584242] [2022-07-21 09:17:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520584242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:59,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:59,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:17:59,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497874618] [2022-07-21 09:17:59,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:59,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:17:59,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:17:59,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:17:59,340 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:17:59,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 273 transitions, 2558 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:17:59,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:59,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:17:59,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:00,568 INFO L129 PetriNetUnfolder]: 262/761 cut-off events. [2022-07-21 09:18:00,568 INFO L130 PetriNetUnfolder]: For 5108/5108 co-relation queries the response was YES. [2022-07-21 09:18:00,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4334 conditions, 761 events. 262/761 cut-off events. For 5108/5108 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3848 event pairs, 21 based on Foata normal form. 1/759 useless extension candidates. Maximal degree in co-relation 4233. Up to 493 conditions per place. [2022-07-21 09:18:00,575 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 155 selfloop transitions, 94 changer transitions 18/306 dead transitions. [2022-07-21 09:18:00,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 306 transitions, 3298 flow [2022-07-21 09:18:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:18:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:18:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1646 transitions. [2022-07-21 09:18:00,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5648592999313659 [2022-07-21 09:18:00,581 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1646 transitions. [2022-07-21 09:18:00,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1646 transitions. [2022-07-21 09:18:00,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:00,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1646 transitions. [2022-07-21 09:18:00,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.096774193548384) internal successors, (1646), 31 states have internal predecessors, (1646), 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) [2022-07-21 09:18:00,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:00,584 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:00,584 INFO L186 Difference]: Start difference. First operand has 334 places, 273 transitions, 2558 flow. Second operand 31 states and 1646 transitions. [2022-07-21 09:18:00,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 306 transitions, 3298 flow [2022-07-21 09:18:00,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 306 transitions, 3069 flow, removed 26 selfloop flow, removed 34 redundant places. [2022-07-21 09:18:00,612 INFO L242 Difference]: Finished difference. Result has 330 places, 270 transitions, 2539 flow [2022-07-21 09:18:00,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2539, PETRI_PLACES=330, PETRI_TRANSITIONS=270} [2022-07-21 09:18:00,613 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 242 predicate places. [2022-07-21 09:18:00,613 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 270 transitions, 2539 flow [2022-07-21 09:18:00,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:00,614 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:00,614 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] [2022-07-21 09:18:00,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 09:18:00,614 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:00,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash 681641326, now seen corresponding path program 29 times [2022-07-21 09:18:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:00,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097137416] [2022-07-21 09:18:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:00,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:00,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097137416] [2022-07-21 09:18:00,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097137416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:00,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:00,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:00,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835384091] [2022-07-21 09:18:00,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:00,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:00,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:00,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 270 transitions, 2539 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:00,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:00,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:00,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:01,859 INFO L129 PetriNetUnfolder]: 262/761 cut-off events. [2022-07-21 09:18:01,859 INFO L130 PetriNetUnfolder]: For 4914/4914 co-relation queries the response was YES. [2022-07-21 09:18:01,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4358 conditions, 761 events. 262/761 cut-off events. For 4914/4914 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3826 event pairs, 17 based on Foata normal form. 1/759 useless extension candidates. Maximal degree in co-relation 4258. Up to 466 conditions per place. [2022-07-21 09:18:01,867 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 147 selfloop transitions, 111 changer transitions 19/316 dead transitions. [2022-07-21 09:18:01,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 316 transitions, 3517 flow [2022-07-21 09:18:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 09:18:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-21 09:18:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1553 transitions. [2022-07-21 09:18:01,869 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5696991929567131 [2022-07-21 09:18:01,869 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1553 transitions. [2022-07-21 09:18:01,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1553 transitions. [2022-07-21 09:18:01,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:01,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1553 transitions. [2022-07-21 09:18:01,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.55172413793103) internal successors, (1553), 29 states have internal predecessors, (1553), 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) [2022-07-21 09:18:01,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 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) [2022-07-21 09:18:01,872 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 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) [2022-07-21 09:18:01,872 INFO L186 Difference]: Start difference. First operand has 330 places, 270 transitions, 2539 flow. Second operand 29 states and 1553 transitions. [2022-07-21 09:18:01,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 316 transitions, 3517 flow [2022-07-21 09:18:01,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 316 transitions, 3219 flow, removed 15 selfloop flow, removed 32 redundant places. [2022-07-21 09:18:01,904 INFO L242 Difference]: Finished difference. Result has 325 places, 275 transitions, 2609 flow [2022-07-21 09:18:01,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2609, PETRI_PLACES=325, PETRI_TRANSITIONS=275} [2022-07-21 09:18:01,905 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 237 predicate places. [2022-07-21 09:18:01,905 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 275 transitions, 2609 flow [2022-07-21 09:18:01,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:01,906 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:01,906 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] [2022-07-21 09:18:01,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 09:18:01,906 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash 860362678, now seen corresponding path program 30 times [2022-07-21 09:18:01,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:01,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013726820] [2022-07-21 09:18:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:01,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013726820] [2022-07-21 09:18:02,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013726820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:02,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:02,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:18:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998335704] [2022-07-21 09:18:02,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:02,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:18:02,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:18:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:18:02,212 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:02,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 275 transitions, 2609 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:18:02,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:02,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:02,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:05,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:18:05,327 INFO L129 PetriNetUnfolder]: 258/735 cut-off events. [2022-07-21 09:18:05,328 INFO L130 PetriNetUnfolder]: For 4990/4990 co-relation queries the response was YES. [2022-07-21 09:18:05,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 735 events. 258/735 cut-off events. For 4990/4990 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3573 event pairs, 20 based on Foata normal form. 1/733 useless extension candidates. Maximal degree in co-relation 4133. Up to 505 conditions per place. [2022-07-21 09:18:05,335 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 166 selfloop transitions, 64 changer transitions 29/298 dead transitions. [2022-07-21 09:18:05,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 298 transitions, 3230 flow [2022-07-21 09:18:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:18:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:18:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1681 transitions. [2022-07-21 09:18:05,336 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.558843085106383 [2022-07-21 09:18:05,336 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1681 transitions. [2022-07-21 09:18:05,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1681 transitions. [2022-07-21 09:18:05,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:05,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1681 transitions. [2022-07-21 09:18:05,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.53125) internal successors, (1681), 32 states have internal predecessors, (1681), 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) [2022-07-21 09:18:05,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:05,340 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:05,340 INFO L186 Difference]: Start difference. First operand has 325 places, 275 transitions, 2609 flow. Second operand 32 states and 1681 transitions. [2022-07-21 09:18:05,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 298 transitions, 3230 flow [2022-07-21 09:18:05,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 298 transitions, 2964 flow, removed 41 selfloop flow, removed 25 redundant places. [2022-07-21 09:18:05,366 INFO L242 Difference]: Finished difference. Result has 330 places, 255 transitions, 2250 flow [2022-07-21 09:18:05,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2250, PETRI_PLACES=330, PETRI_TRANSITIONS=255} [2022-07-21 09:18:05,366 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 242 predicate places. [2022-07-21 09:18:05,367 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 255 transitions, 2250 flow [2022-07-21 09:18:05,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:18:05,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:05,367 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] [2022-07-21 09:18:05,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 09:18:05,367 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:05,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash -575180962, now seen corresponding path program 31 times [2022-07-21 09:18:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330954544] [2022-07-21 09:18:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:05,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:05,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330954544] [2022-07-21 09:18:05,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330954544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:05,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:05,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017653106] [2022-07-21 09:18:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:05,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:05,678 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:05,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 255 transitions, 2250 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:05,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:05,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:05,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:06,710 INFO L129 PetriNetUnfolder]: 261/731 cut-off events. [2022-07-21 09:18:06,711 INFO L130 PetriNetUnfolder]: For 4284/4284 co-relation queries the response was YES. [2022-07-21 09:18:06,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4043 conditions, 731 events. 261/731 cut-off events. For 4284/4284 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3544 event pairs, 17 based on Foata normal form. 1/729 useless extension candidates. Maximal degree in co-relation 3946. Up to 463 conditions per place. [2022-07-21 09:18:06,718 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 143 selfloop transitions, 97 changer transitions 18/297 dead transitions. [2022-07-21 09:18:06,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 297 transitions, 3101 flow [2022-07-21 09:18:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:18:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:18:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1602 transitions. [2022-07-21 09:18:06,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5680851063829787 [2022-07-21 09:18:06,720 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1602 transitions. [2022-07-21 09:18:06,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1602 transitions. [2022-07-21 09:18:06,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:06,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1602 transitions. [2022-07-21 09:18:06,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.4) internal successors, (1602), 30 states have internal predecessors, (1602), 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) [2022-07-21 09:18:06,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:18:06,723 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:18:06,724 INFO L186 Difference]: Start difference. First operand has 330 places, 255 transitions, 2250 flow. Second operand 30 states and 1602 transitions. [2022-07-21 09:18:06,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 297 transitions, 3101 flow [2022-07-21 09:18:06,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 297 transitions, 2818 flow, removed 35 selfloop flow, removed 37 redundant places. [2022-07-21 09:18:06,748 INFO L242 Difference]: Finished difference. Result has 301 places, 257 transitions, 2260 flow [2022-07-21 09:18:06,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2260, PETRI_PLACES=301, PETRI_TRANSITIONS=257} [2022-07-21 09:18:06,749 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 213 predicate places. [2022-07-21 09:18:06,749 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 257 transitions, 2260 flow [2022-07-21 09:18:06,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:06,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:06,749 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] [2022-07-21 09:18:06,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-21 09:18:06,750 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash -397698678, now seen corresponding path program 32 times [2022-07-21 09:18:06,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:06,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653201540] [2022-07-21 09:18:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:07,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653201540] [2022-07-21 09:18:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653201540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:07,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:07,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:07,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763719020] [2022-07-21 09:18:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:07,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:07,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:07,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 257 transitions, 2260 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:07,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:07,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:07,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:08,019 INFO L129 PetriNetUnfolder]: 256/718 cut-off events. [2022-07-21 09:18:08,020 INFO L130 PetriNetUnfolder]: For 4216/4216 co-relation queries the response was YES. [2022-07-21 09:18:08,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3933 conditions, 718 events. 256/718 cut-off events. For 4216/4216 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3428 event pairs, 18 based on Foata normal form. 1/716 useless extension candidates. Maximal degree in co-relation 3843. Up to 456 conditions per place. [2022-07-21 09:18:08,027 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 143 selfloop transitions, 100 changer transitions 14/296 dead transitions. [2022-07-21 09:18:08,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 296 transitions, 3085 flow [2022-07-21 09:18:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:18:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:18:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1701 transitions. [2022-07-21 09:18:08,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5654920212765957 [2022-07-21 09:18:08,028 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1701 transitions. [2022-07-21 09:18:08,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1701 transitions. [2022-07-21 09:18:08,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:08,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1701 transitions. [2022-07-21 09:18:08,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.15625) internal successors, (1701), 32 states have internal predecessors, (1701), 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) [2022-07-21 09:18:08,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:08,032 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:08,032 INFO L186 Difference]: Start difference. First operand has 301 places, 257 transitions, 2260 flow. Second operand 32 states and 1701 transitions. [2022-07-21 09:18:08,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 296 transitions, 3085 flow [2022-07-21 09:18:08,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 296 transitions, 2878 flow, removed 28 selfloop flow, removed 27 redundant places. [2022-07-21 09:18:08,056 INFO L242 Difference]: Finished difference. Result has 307 places, 260 transitions, 2363 flow [2022-07-21 09:18:08,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2363, PETRI_PLACES=307, PETRI_TRANSITIONS=260} [2022-07-21 09:18:08,056 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 219 predicate places. [2022-07-21 09:18:08,056 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 260 transitions, 2363 flow [2022-07-21 09:18:08,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:08,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:08,057 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] [2022-07-21 09:18:08,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-21 09:18:08,057 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -953887820, now seen corresponding path program 33 times [2022-07-21 09:18:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:08,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019568650] [2022-07-21 09:18:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:08,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019568650] [2022-07-21 09:18:08,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019568650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:08,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:08,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:08,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281124053] [2022-07-21 09:18:08,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:08,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:08,335 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:08,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 260 transitions, 2363 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:08,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:08,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:08,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:09,489 INFO L129 PetriNetUnfolder]: 257/722 cut-off events. [2022-07-21 09:18:09,489 INFO L130 PetriNetUnfolder]: For 4059/4059 co-relation queries the response was YES. [2022-07-21 09:18:09,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4000 conditions, 722 events. 257/722 cut-off events. For 4059/4059 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3475 event pairs, 18 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 3910. Up to 455 conditions per place. [2022-07-21 09:18:09,496 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 140 selfloop transitions, 105 changer transitions 16/300 dead transitions. [2022-07-21 09:18:09,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 300 transitions, 3193 flow [2022-07-21 09:18:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:18:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:18:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1853 transitions. [2022-07-21 09:18:09,498 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5632218844984802 [2022-07-21 09:18:09,498 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1853 transitions. [2022-07-21 09:18:09,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1853 transitions. [2022-07-21 09:18:09,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:09,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1853 transitions. [2022-07-21 09:18:09,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.94285714285714) internal successors, (1853), 35 states have internal predecessors, (1853), 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) [2022-07-21 09:18:09,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:18:09,502 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:18:09,502 INFO L186 Difference]: Start difference. First operand has 307 places, 260 transitions, 2363 flow. Second operand 35 states and 1853 transitions. [2022-07-21 09:18:09,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 300 transitions, 3193 flow [2022-07-21 09:18:09,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 300 transitions, 2957 flow, removed 33 selfloop flow, removed 27 redundant places. [2022-07-21 09:18:09,524 INFO L242 Difference]: Finished difference. Result has 316 places, 262 transitions, 2439 flow [2022-07-21 09:18:09,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2439, PETRI_PLACES=316, PETRI_TRANSITIONS=262} [2022-07-21 09:18:09,525 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 228 predicate places. [2022-07-21 09:18:09,525 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 262 transitions, 2439 flow [2022-07-21 09:18:09,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:09,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:09,525 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] [2022-07-21 09:18:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-21 09:18:09,526 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1987884648, now seen corresponding path program 34 times [2022-07-21 09:18:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:09,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753226175] [2022-07-21 09:18:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:09,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:09,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:09,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753226175] [2022-07-21 09:18:09,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753226175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:09,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:09,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194899013] [2022-07-21 09:18:09,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:09,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:09,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:09,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:09,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 262 transitions, 2439 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:09,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:09,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:09,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:11,266 INFO L129 PetriNetUnfolder]: 255/718 cut-off events. [2022-07-21 09:18:11,266 INFO L130 PetriNetUnfolder]: For 4331/4331 co-relation queries the response was YES. [2022-07-21 09:18:11,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4053 conditions, 718 events. 255/718 cut-off events. For 4331/4331 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3441 event pairs, 16 based on Foata normal form. 1/717 useless extension candidates. Maximal degree in co-relation 3960. Up to 481 conditions per place. [2022-07-21 09:18:11,272 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 160 selfloop transitions, 80 changer transitions 15/294 dead transitions. [2022-07-21 09:18:11,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 294 transitions, 3181 flow [2022-07-21 09:18:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:18:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:18:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1690 transitions. [2022-07-21 09:18:11,274 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5618351063829787 [2022-07-21 09:18:11,274 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1690 transitions. [2022-07-21 09:18:11,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1690 transitions. [2022-07-21 09:18:11,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:11,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1690 transitions. [2022-07-21 09:18:11,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.8125) internal successors, (1690), 32 states have internal predecessors, (1690), 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) [2022-07-21 09:18:11,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:11,277 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:11,277 INFO L186 Difference]: Start difference. First operand has 316 places, 262 transitions, 2439 flow. Second operand 32 states and 1690 transitions. [2022-07-21 09:18:11,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 294 transitions, 3181 flow [2022-07-21 09:18:11,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 294 transitions, 2914 flow, removed 26 selfloop flow, removed 30 redundant places. [2022-07-21 09:18:11,302 INFO L242 Difference]: Finished difference. Result has 319 places, 261 transitions, 2351 flow [2022-07-21 09:18:11,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2351, PETRI_PLACES=319, PETRI_TRANSITIONS=261} [2022-07-21 09:18:11,303 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 231 predicate places. [2022-07-21 09:18:11,303 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 261 transitions, 2351 flow [2022-07-21 09:18:11,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:11,303 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:11,303 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] [2022-07-21 09:18:11,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 09:18:11,303 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash 536324172, now seen corresponding path program 35 times [2022-07-21 09:18:11,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:11,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612846881] [2022-07-21 09:18:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:11,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612846881] [2022-07-21 09:18:11,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612846881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:11,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:11,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:11,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578406427] [2022-07-21 09:18:11,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:11,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:11,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:11,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:11,597 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:11,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 261 transitions, 2351 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:11,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:11,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:11,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:12,487 INFO L129 PetriNetUnfolder]: 250/700 cut-off events. [2022-07-21 09:18:12,487 INFO L130 PetriNetUnfolder]: For 4289/4289 co-relation queries the response was YES. [2022-07-21 09:18:12,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 700 events. 250/700 cut-off events. For 4289/4289 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3312 event pairs, 16 based on Foata normal form. 1/699 useless extension candidates. Maximal degree in co-relation 3849. Up to 453 conditions per place. [2022-07-21 09:18:12,494 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 146 selfloop transitions, 87 changer transitions 18/290 dead transitions. [2022-07-21 09:18:12,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 290 transitions, 3035 flow [2022-07-21 09:18:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:18:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:18:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1647 transitions. [2022-07-21 09:18:12,495 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5652024708304736 [2022-07-21 09:18:12,495 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1647 transitions. [2022-07-21 09:18:12,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1647 transitions. [2022-07-21 09:18:12,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:12,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1647 transitions. [2022-07-21 09:18:12,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.12903225806452) internal successors, (1647), 31 states have internal predecessors, (1647), 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) [2022-07-21 09:18:12,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:12,499 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:12,499 INFO L186 Difference]: Start difference. First operand has 319 places, 261 transitions, 2351 flow. Second operand 31 states and 1647 transitions. [2022-07-21 09:18:12,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 290 transitions, 3035 flow [2022-07-21 09:18:12,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 290 transitions, 2842 flow, removed 16 selfloop flow, removed 31 redundant places. [2022-07-21 09:18:12,525 INFO L242 Difference]: Finished difference. Result has 317 places, 251 transitions, 2270 flow [2022-07-21 09:18:12,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2270, PETRI_PLACES=317, PETRI_TRANSITIONS=251} [2022-07-21 09:18:12,525 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 229 predicate places. [2022-07-21 09:18:12,526 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 251 transitions, 2270 flow [2022-07-21 09:18:12,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:12,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:12,526 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] [2022-07-21 09:18:12,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-21 09:18:12,526 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:12,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:12,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1431551966, now seen corresponding path program 36 times [2022-07-21 09:18:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:12,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033732948] [2022-07-21 09:18:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:12,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:12,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033732948] [2022-07-21 09:18:12,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033732948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:12,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:12,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:12,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116745457] [2022-07-21 09:18:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:12,822 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:12,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 251 transitions, 2270 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:12,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:12,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:12,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:13,795 INFO L129 PetriNetUnfolder]: 245/689 cut-off events. [2022-07-21 09:18:13,796 INFO L130 PetriNetUnfolder]: For 4086/4086 co-relation queries the response was YES. [2022-07-21 09:18:13,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 689 events. 245/689 cut-off events. For 4086/4086 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3275 event pairs, 17 based on Foata normal form. 1/688 useless extension candidates. Maximal degree in co-relation 3771. Up to 445 conditions per place. [2022-07-21 09:18:13,802 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 139 selfloop transitions, 84 changer transitions 18/280 dead transitions. [2022-07-21 09:18:13,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 280 transitions, 2932 flow [2022-07-21 09:18:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:18:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:18:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1696 transitions. [2022-07-21 09:18:13,804 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2022-07-21 09:18:13,804 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1696 transitions. [2022-07-21 09:18:13,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1696 transitions. [2022-07-21 09:18:13,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:13,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1696 transitions. [2022-07-21 09:18:13,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.0) internal successors, (1696), 32 states have internal predecessors, (1696), 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) [2022-07-21 09:18:13,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:13,808 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:13,808 INFO L186 Difference]: Start difference. First operand has 317 places, 251 transitions, 2270 flow. Second operand 32 states and 1696 transitions. [2022-07-21 09:18:13,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 280 transitions, 2932 flow [2022-07-21 09:18:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 280 transitions, 2676 flow, removed 19 selfloop flow, removed 32 redundant places. [2022-07-21 09:18:13,836 INFO L242 Difference]: Finished difference. Result has 308 places, 241 transitions, 2125 flow [2022-07-21 09:18:13,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2125, PETRI_PLACES=308, PETRI_TRANSITIONS=241} [2022-07-21 09:18:13,836 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 220 predicate places. [2022-07-21 09:18:13,836 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 241 transitions, 2125 flow [2022-07-21 09:18:13,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:13,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:13,837 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] [2022-07-21 09:18:13,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-21 09:18:13,837 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash 105401958, now seen corresponding path program 37 times [2022-07-21 09:18:13,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:13,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092573076] [2022-07-21 09:18:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:13,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:14,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:14,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092573076] [2022-07-21 09:18:14,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092573076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:14,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:14,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818394671] [2022-07-21 09:18:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:14,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:14,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:14,121 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:14,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 241 transitions, 2125 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:14,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:14,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:14,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:14,954 INFO L129 PetriNetUnfolder]: 242/664 cut-off events. [2022-07-21 09:18:14,954 INFO L130 PetriNetUnfolder]: For 3844/3844 co-relation queries the response was YES. [2022-07-21 09:18:14,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 664 events. 242/664 cut-off events. For 3844/3844 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3086 event pairs, 15 based on Foata normal form. 1/662 useless extension candidates. Maximal degree in co-relation 3650. Up to 438 conditions per place. [2022-07-21 09:18:14,960 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 128 selfloop transitions, 80 changer transitions 24/271 dead transitions. [2022-07-21 09:18:14,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 271 transitions, 2764 flow [2022-07-21 09:18:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:18:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:18:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1594 transitions. [2022-07-21 09:18:14,962 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5652482269503546 [2022-07-21 09:18:14,962 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1594 transitions. [2022-07-21 09:18:14,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1594 transitions. [2022-07-21 09:18:14,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:14,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1594 transitions. [2022-07-21 09:18:14,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.13333333333333) internal successors, (1594), 30 states have internal predecessors, (1594), 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) [2022-07-21 09:18:14,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:18:14,969 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:18:14,970 INFO L186 Difference]: Start difference. First operand has 308 places, 241 transitions, 2125 flow. Second operand 30 states and 1594 transitions. [2022-07-21 09:18:14,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 271 transitions, 2764 flow [2022-07-21 09:18:14,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 271 transitions, 2511 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-07-21 09:18:14,991 INFO L242 Difference]: Finished difference. Result has 293 places, 230 transitions, 1976 flow [2022-07-21 09:18:14,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1976, PETRI_PLACES=293, PETRI_TRANSITIONS=230} [2022-07-21 09:18:14,992 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 205 predicate places. [2022-07-21 09:18:14,992 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 230 transitions, 1976 flow [2022-07-21 09:18:14,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:14,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:14,993 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] [2022-07-21 09:18:14,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-21 09:18:14,993 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1913970746, now seen corresponding path program 38 times [2022-07-21 09:18:14,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803693229] [2022-07-21 09:18:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:15,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803693229] [2022-07-21 09:18:15,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803693229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:15,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:15,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065989427] [2022-07-21 09:18:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:15,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:15,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:15,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 230 transitions, 1976 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:15,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:15,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:15,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:16,186 INFO L129 PetriNetUnfolder]: 234/643 cut-off events. [2022-07-21 09:18:16,186 INFO L130 PetriNetUnfolder]: For 3501/3501 co-relation queries the response was YES. [2022-07-21 09:18:16,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 643 events. 234/643 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2914 event pairs, 16 based on Foata normal form. 1/641 useless extension candidates. Maximal degree in co-relation 3459. Up to 437 conditions per place. [2022-07-21 09:18:16,192 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 129 selfloop transitions, 65 changer transitions 23/256 dead transitions. [2022-07-21 09:18:16,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 256 transitions, 2545 flow [2022-07-21 09:18:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:18:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:18:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1584 transitions. [2022-07-21 09:18:16,193 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2022-07-21 09:18:16,193 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1584 transitions. [2022-07-21 09:18:16,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1584 transitions. [2022-07-21 09:18:16,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:16,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1584 transitions. [2022-07-21 09:18:16,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.8) internal successors, (1584), 30 states have internal predecessors, (1584), 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) [2022-07-21 09:18:16,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:18:16,196 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 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) [2022-07-21 09:18:16,196 INFO L186 Difference]: Start difference. First operand has 293 places, 230 transitions, 1976 flow. Second operand 30 states and 1584 transitions. [2022-07-21 09:18:16,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 256 transitions, 2545 flow [2022-07-21 09:18:16,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 256 transitions, 2252 flow, removed 16 selfloop flow, removed 39 redundant places. [2022-07-21 09:18:16,213 INFO L242 Difference]: Finished difference. Result has 276 places, 218 transitions, 1728 flow [2022-07-21 09:18:16,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1728, PETRI_PLACES=276, PETRI_TRANSITIONS=218} [2022-07-21 09:18:16,214 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 188 predicate places. [2022-07-21 09:18:16,214 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 218 transitions, 1728 flow [2022-07-21 09:18:16,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:16,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:16,214 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] [2022-07-21 09:18:16,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-21 09:18:16,214 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1285129540, now seen corresponding path program 39 times [2022-07-21 09:18:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:16,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2664379] [2022-07-21 09:18:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:16,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2664379] [2022-07-21 09:18:16,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2664379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:16,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:16,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:18:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730167905] [2022-07-21 09:18:16,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:18:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:18:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:18:16,517 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:16,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 218 transitions, 1728 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:16,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:16,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:16,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:20,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:18:20,297 INFO L129 PetriNetUnfolder]: 232/646 cut-off events. [2022-07-21 09:18:20,297 INFO L130 PetriNetUnfolder]: For 3035/3035 co-relation queries the response was YES. [2022-07-21 09:18:20,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3355 conditions, 646 events. 232/646 cut-off events. For 3035/3035 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2921 event pairs, 16 based on Foata normal form. 1/645 useless extension candidates. Maximal degree in co-relation 3275. Up to 427 conditions per place. [2022-07-21 09:18:20,303 INFO L132 encePairwiseOnDemand]: 63/94 looper letters, 121 selfloop transitions, 78 changer transitions 14/252 dead transitions. [2022-07-21 09:18:20,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 252 transitions, 2384 flow [2022-07-21 09:18:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:18:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:18:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1837 transitions. [2022-07-21 09:18:20,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5583586626139818 [2022-07-21 09:18:20,304 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1837 transitions. [2022-07-21 09:18:20,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1837 transitions. [2022-07-21 09:18:20,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:20,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1837 transitions. [2022-07-21 09:18:20,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.48571428571429) internal successors, (1837), 35 states have internal predecessors, (1837), 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) [2022-07-21 09:18:20,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:18:20,307 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:18:20,307 INFO L186 Difference]: Start difference. First operand has 276 places, 218 transitions, 1728 flow. Second operand 35 states and 1837 transitions. [2022-07-21 09:18:20,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 252 transitions, 2384 flow [2022-07-21 09:18:20,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 252 transitions, 2158 flow, removed 19 selfloop flow, removed 32 redundant places. [2022-07-21 09:18:20,323 INFO L242 Difference]: Finished difference. Result has 266 places, 219 transitions, 1730 flow [2022-07-21 09:18:20,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1730, PETRI_PLACES=266, PETRI_TRANSITIONS=219} [2022-07-21 09:18:20,324 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 178 predicate places. [2022-07-21 09:18:20,324 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 219 transitions, 1730 flow [2022-07-21 09:18:20,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:20,324 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:20,324 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] [2022-07-21 09:18:20,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-21 09:18:20,325 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash -474070142, now seen corresponding path program 40 times [2022-07-21 09:18:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:20,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684004537] [2022-07-21 09:18:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:20,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:20,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684004537] [2022-07-21 09:18:20,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684004537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:20,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:20,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:18:20,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726561870] [2022-07-21 09:18:20,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:20,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:18:20,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:20,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:18:20,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:18:20,614 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:20,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 219 transitions, 1730 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:20,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:20,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:20,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:21,791 INFO L129 PetriNetUnfolder]: 229/631 cut-off events. [2022-07-21 09:18:21,791 INFO L130 PetriNetUnfolder]: For 3032/3032 co-relation queries the response was YES. [2022-07-21 09:18:21,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 631 events. 229/631 cut-off events. For 3032/3032 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2828 event pairs, 17 based on Foata normal form. 1/630 useless extension candidates. Maximal degree in co-relation 3216. Up to 424 conditions per place. [2022-07-21 09:18:21,796 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 112 selfloop transitions, 55 changer transitions 37/243 dead transitions. [2022-07-21 09:18:21,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 243 transitions, 2257 flow [2022-07-21 09:18:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:18:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:18:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1630 transitions. [2022-07-21 09:18:21,798 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5593685655456417 [2022-07-21 09:18:21,798 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1630 transitions. [2022-07-21 09:18:21,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1630 transitions. [2022-07-21 09:18:21,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:21,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1630 transitions. [2022-07-21 09:18:21,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.58064516129032) internal successors, (1630), 31 states have internal predecessors, (1630), 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) [2022-07-21 09:18:21,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:21,801 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:21,801 INFO L186 Difference]: Start difference. First operand has 266 places, 219 transitions, 1730 flow. Second operand 31 states and 1630 transitions. [2022-07-21 09:18:21,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 243 transitions, 2257 flow [2022-07-21 09:18:21,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 243 transitions, 2052 flow, removed 28 selfloop flow, removed 28 redundant places. [2022-07-21 09:18:21,816 INFO L242 Difference]: Finished difference. Result has 264 places, 196 transitions, 1516 flow [2022-07-21 09:18:21,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1516, PETRI_PLACES=264, PETRI_TRANSITIONS=196} [2022-07-21 09:18:21,817 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 176 predicate places. [2022-07-21 09:18:21,817 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 196 transitions, 1516 flow [2022-07-21 09:18:21,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:21,817 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:21,817 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] [2022-07-21 09:18:21,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-21 09:18:21,818 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash -728521452, now seen corresponding path program 41 times [2022-07-21 09:18:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:21,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058071787] [2022-07-21 09:18:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:22,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:22,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058071787] [2022-07-21 09:18:22,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058071787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:22,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:22,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:22,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762377412] [2022-07-21 09:18:22,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:22,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:22,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:22,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:22,146 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 196 transitions, 1516 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:22,146 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:22,146 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:22,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:24,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:18:25,228 INFO L129 PetriNetUnfolder]: 258/721 cut-off events. [2022-07-21 09:18:25,228 INFO L130 PetriNetUnfolder]: For 3846/3846 co-relation queries the response was YES. [2022-07-21 09:18:25,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 721 events. 258/721 cut-off events. For 3846/3846 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3522 event pairs, 44 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 3657. Up to 433 conditions per place. [2022-07-21 09:18:25,234 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 114 selfloop transitions, 79 changer transitions 45/277 dead transitions. [2022-07-21 09:18:25,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 277 transitions, 2813 flow [2022-07-21 09:18:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:18:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:18:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1962 transitions. [2022-07-21 09:18:25,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5641173087981599 [2022-07-21 09:18:25,236 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1962 transitions. [2022-07-21 09:18:25,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1962 transitions. [2022-07-21 09:18:25,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:25,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1962 transitions. [2022-07-21 09:18:25,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.027027027027025) internal successors, (1962), 37 states have internal predecessors, (1962), 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) [2022-07-21 09:18:25,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:18:25,240 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:18:25,240 INFO L186 Difference]: Start difference. First operand has 264 places, 196 transitions, 1516 flow. Second operand 37 states and 1962 transitions. [2022-07-21 09:18:25,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 277 transitions, 2813 flow [2022-07-21 09:18:25,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 277 transitions, 2475 flow, removed 43 selfloop flow, removed 33 redundant places. [2022-07-21 09:18:25,257 INFO L242 Difference]: Finished difference. Result has 257 places, 219 transitions, 1820 flow [2022-07-21 09:18:25,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1820, PETRI_PLACES=257, PETRI_TRANSITIONS=219} [2022-07-21 09:18:25,258 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 169 predicate places. [2022-07-21 09:18:25,258 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 219 transitions, 1820 flow [2022-07-21 09:18:25,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:25,258 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:25,258 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] [2022-07-21 09:18:25,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-21 09:18:25,259 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:25,259 INFO L85 PathProgramCache]: Analyzing trace with hash -769767400, now seen corresponding path program 42 times [2022-07-21 09:18:25,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:25,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136044334] [2022-07-21 09:18:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:25,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:25,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136044334] [2022-07-21 09:18:25,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136044334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:25,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:25,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:25,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441055547] [2022-07-21 09:18:25,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:25,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:25,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:25,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 219 transitions, 1820 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:25,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:25,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:25,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:26,548 INFO L129 PetriNetUnfolder]: 258/723 cut-off events. [2022-07-21 09:18:26,549 INFO L130 PetriNetUnfolder]: For 4585/4585 co-relation queries the response was YES. [2022-07-21 09:18:26,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3885 conditions, 723 events. 258/723 cut-off events. For 4585/4585 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3538 event pairs, 35 based on Foata normal form. 1/722 useless extension candidates. Maximal degree in co-relation 3802. Up to 442 conditions per place. [2022-07-21 09:18:26,554 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 83 changer transitions 36/278 dead transitions. [2022-07-21 09:18:26,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 278 transitions, 2883 flow [2022-07-21 09:18:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:18:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:18:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1811 transitions. [2022-07-21 09:18:26,556 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5666458072590739 [2022-07-21 09:18:26,556 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1811 transitions. [2022-07-21 09:18:26,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1811 transitions. [2022-07-21 09:18:26,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:26,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1811 transitions. [2022-07-21 09:18:26,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.26470588235294) internal successors, (1811), 34 states have internal predecessors, (1811), 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) [2022-07-21 09:18:26,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:18:26,559 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:18:26,559 INFO L186 Difference]: Start difference. First operand has 257 places, 219 transitions, 1820 flow. Second operand 34 states and 1811 transitions. [2022-07-21 09:18:26,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 278 transitions, 2883 flow [2022-07-21 09:18:26,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 278 transitions, 2507 flow, removed 146 selfloop flow, removed 23 redundant places. [2022-07-21 09:18:26,577 INFO L242 Difference]: Finished difference. Result has 270 places, 228 transitions, 1877 flow [2022-07-21 09:18:26,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1877, PETRI_PLACES=270, PETRI_TRANSITIONS=228} [2022-07-21 09:18:26,577 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 182 predicate places. [2022-07-21 09:18:26,577 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 228 transitions, 1877 flow [2022-07-21 09:18:26,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:26,578 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:26,578 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] [2022-07-21 09:18:26,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-21 09:18:26,578 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash 729093560, now seen corresponding path program 43 times [2022-07-21 09:18:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:26,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766576297] [2022-07-21 09:18:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:26,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:26,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766576297] [2022-07-21 09:18:26,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766576297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:26,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:26,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:18:26,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718725670] [2022-07-21 09:18:26,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:26,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:18:26,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:18:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:18:26,882 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:26,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 228 transitions, 1877 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:26,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:26,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:26,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:29,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:18:31,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:18:31,762 INFO L129 PetriNetUnfolder]: 279/777 cut-off events. [2022-07-21 09:18:31,762 INFO L130 PetriNetUnfolder]: For 6035/6035 co-relation queries the response was YES. [2022-07-21 09:18:31,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 777 events. 279/777 cut-off events. For 6035/6035 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3882 event pairs, 40 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 4275. Up to 490 conditions per place. [2022-07-21 09:18:31,769 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 143 selfloop transitions, 111 changer transitions 27/320 dead transitions. [2022-07-21 09:18:31,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 320 transitions, 3634 flow [2022-07-21 09:18:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 09:18:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-21 09:18:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2570 transitions. [2022-07-21 09:18:31,771 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5579678679982631 [2022-07-21 09:18:31,771 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2570 transitions. [2022-07-21 09:18:31,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2570 transitions. [2022-07-21 09:18:31,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:31,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2570 transitions. [2022-07-21 09:18:31,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 52.44897959183673) internal successors, (2570), 49 states have internal predecessors, (2570), 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) [2022-07-21 09:18:31,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 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) [2022-07-21 09:18:31,775 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 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) [2022-07-21 09:18:31,775 INFO L186 Difference]: Start difference. First operand has 270 places, 228 transitions, 1877 flow. Second operand 49 states and 2570 transitions. [2022-07-21 09:18:31,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 320 transitions, 3634 flow [2022-07-21 09:18:31,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 320 transitions, 3284 flow, removed 118 selfloop flow, removed 28 redundant places. [2022-07-21 09:18:31,798 INFO L242 Difference]: Finished difference. Result has 288 places, 279 transitions, 2702 flow [2022-07-21 09:18:31,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2702, PETRI_PLACES=288, PETRI_TRANSITIONS=279} [2022-07-21 09:18:31,798 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 200 predicate places. [2022-07-21 09:18:31,798 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 279 transitions, 2702 flow [2022-07-21 09:18:31,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:31,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:31,799 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] [2022-07-21 09:18:31,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-21 09:18:31,799 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:31,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1944538958, now seen corresponding path program 44 times [2022-07-21 09:18:31,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:31,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429605851] [2022-07-21 09:18:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:31,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:32,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429605851] [2022-07-21 09:18:32,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429605851] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:32,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:32,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:32,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146502198] [2022-07-21 09:18:32,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:32,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:32,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:32,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:32,061 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:32,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 279 transitions, 2702 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:32,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:32,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:32,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:33,159 INFO L129 PetriNetUnfolder]: 294/792 cut-off events. [2022-07-21 09:18:33,160 INFO L130 PetriNetUnfolder]: For 5929/5929 co-relation queries the response was YES. [2022-07-21 09:18:33,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4693 conditions, 792 events. 294/792 cut-off events. For 5929/5929 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4037 event pairs, 45 based on Foata normal form. 1/789 useless extension candidates. Maximal degree in co-relation 4612. Up to 528 conditions per place. [2022-07-21 09:18:33,173 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 173 selfloop transitions, 96 changer transitions 38/346 dead transitions. [2022-07-21 09:18:33,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 346 transitions, 4039 flow [2022-07-21 09:18:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 09:18:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-21 09:18:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2115 transitions. [2022-07-21 09:18:33,175 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5625 [2022-07-21 09:18:33,175 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2115 transitions. [2022-07-21 09:18:33,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2115 transitions. [2022-07-21 09:18:33,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:33,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2115 transitions. [2022-07-21 09:18:33,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 52.875) internal successors, (2115), 40 states have internal predecessors, (2115), 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) [2022-07-21 09:18:33,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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) [2022-07-21 09:18:33,179 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 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) [2022-07-21 09:18:33,179 INFO L186 Difference]: Start difference. First operand has 288 places, 279 transitions, 2702 flow. Second operand 40 states and 2115 transitions. [2022-07-21 09:18:33,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 346 transitions, 4039 flow [2022-07-21 09:18:33,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 346 transitions, 3182 flow, removed 387 selfloop flow, removed 23 redundant places. [2022-07-21 09:18:33,213 INFO L242 Difference]: Finished difference. Result has 310 places, 295 transitions, 2475 flow [2022-07-21 09:18:33,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2475, PETRI_PLACES=310, PETRI_TRANSITIONS=295} [2022-07-21 09:18:33,214 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 222 predicate places. [2022-07-21 09:18:33,214 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 295 transitions, 2475 flow [2022-07-21 09:18:33,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:33,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:33,214 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] [2022-07-21 09:18:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-21 09:18:33,215 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:33,215 INFO L85 PathProgramCache]: Analyzing trace with hash 823744676, now seen corresponding path program 45 times [2022-07-21 09:18:33,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:33,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009934518] [2022-07-21 09:18:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:33,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:33,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:33,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009934518] [2022-07-21 09:18:33,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009934518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:33,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:33,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:33,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586090766] [2022-07-21 09:18:33,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:33,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:33,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:33,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:33,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:33,502 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:33,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 295 transitions, 2475 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:33,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:33,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:33,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:34,588 INFO L129 PetriNetUnfolder]: 289/802 cut-off events. [2022-07-21 09:18:34,588 INFO L130 PetriNetUnfolder]: For 5048/5048 co-relation queries the response was YES. [2022-07-21 09:18:34,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4465 conditions, 802 events. 289/802 cut-off events. For 5048/5048 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4161 event pairs, 44 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 4378. Up to 515 conditions per place. [2022-07-21 09:18:34,596 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 172 selfloop transitions, 89 changer transitions 39/339 dead transitions. [2022-07-21 09:18:34,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 339 transitions, 3413 flow [2022-07-21 09:18:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:18:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:18:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1961 transitions. [2022-07-21 09:18:34,598 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2022-07-21 09:18:34,598 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1961 transitions. [2022-07-21 09:18:34,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1961 transitions. [2022-07-21 09:18:34,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:34,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1961 transitions. [2022-07-21 09:18:34,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 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) [2022-07-21 09:18:34,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:18:34,601 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:18:34,601 INFO L186 Difference]: Start difference. First operand has 310 places, 295 transitions, 2475 flow. Second operand 37 states and 1961 transitions. [2022-07-21 09:18:34,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 339 transitions, 3413 flow [2022-07-21 09:18:34,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 339 transitions, 3106 flow, removed 93 selfloop flow, removed 30 redundant places. [2022-07-21 09:18:34,631 INFO L242 Difference]: Finished difference. Result has 319 places, 288 transitions, 2385 flow [2022-07-21 09:18:34,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2385, PETRI_PLACES=319, PETRI_TRANSITIONS=288} [2022-07-21 09:18:34,632 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 231 predicate places. [2022-07-21 09:18:34,632 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 288 transitions, 2385 flow [2022-07-21 09:18:34,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:34,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:34,632 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] [2022-07-21 09:18:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-21 09:18:34,633 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1440281120, now seen corresponding path program 46 times [2022-07-21 09:18:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:34,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314181662] [2022-07-21 09:18:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:34,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314181662] [2022-07-21 09:18:34,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314181662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:34,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:34,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:34,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591148962] [2022-07-21 09:18:34,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:34,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:34,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:34,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:34,921 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:34,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 288 transitions, 2385 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:34,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:34,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:34,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:35,965 INFO L129 PetriNetUnfolder]: 298/814 cut-off events. [2022-07-21 09:18:35,966 INFO L130 PetriNetUnfolder]: For 5491/5491 co-relation queries the response was YES. [2022-07-21 09:18:35,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4655 conditions, 814 events. 298/814 cut-off events. For 5491/5491 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4210 event pairs, 34 based on Foata normal form. 1/812 useless extension candidates. Maximal degree in co-relation 4566. Up to 540 conditions per place. [2022-07-21 09:18:35,976 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 189 selfloop transitions, 87 changer transitions 36/351 dead transitions. [2022-07-21 09:18:35,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 351 transitions, 3622 flow [2022-07-21 09:18:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:18:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:18:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1913 transitions. [2022-07-21 09:18:35,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5653073286052009 [2022-07-21 09:18:35,979 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1913 transitions. [2022-07-21 09:18:35,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1913 transitions. [2022-07-21 09:18:35,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:35,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1913 transitions. [2022-07-21 09:18:35,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.138888888888886) internal successors, (1913), 36 states have internal predecessors, (1913), 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) [2022-07-21 09:18:35,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:18:35,983 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:18:35,983 INFO L186 Difference]: Start difference. First operand has 319 places, 288 transitions, 2385 flow. Second operand 36 states and 1913 transitions. [2022-07-21 09:18:35,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 351 transitions, 3622 flow [2022-07-21 09:18:36,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 351 transitions, 3324 flow, removed 38 selfloop flow, removed 42 redundant places. [2022-07-21 09:18:36,017 INFO L242 Difference]: Finished difference. Result has 317 places, 300 transitions, 2564 flow [2022-07-21 09:18:36,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2564, PETRI_PLACES=317, PETRI_TRANSITIONS=300} [2022-07-21 09:18:36,018 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 229 predicate places. [2022-07-21 09:18:36,018 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 300 transitions, 2564 flow [2022-07-21 09:18:36,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:36,018 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:36,018 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] [2022-07-21 09:18:36,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-21 09:18:36,019 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:36,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1594070820, now seen corresponding path program 47 times [2022-07-21 09:18:36,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:36,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896721842] [2022-07-21 09:18:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896721842] [2022-07-21 09:18:36,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896721842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:36,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:36,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349275946] [2022-07-21 09:18:36,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:36,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:36,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 300 transitions, 2564 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:36,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:36,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:36,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:37,358 INFO L129 PetriNetUnfolder]: 304/877 cut-off events. [2022-07-21 09:18:37,358 INFO L130 PetriNetUnfolder]: For 6009/6009 co-relation queries the response was YES. [2022-07-21 09:18:37,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4818 conditions, 877 events. 304/877 cut-off events. For 6009/6009 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4778 event pairs, 49 based on Foata normal form. 1/876 useless extension candidates. Maximal degree in co-relation 4727. Up to 536 conditions per place. [2022-07-21 09:18:37,367 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 184 selfloop transitions, 98 changer transitions 47/368 dead transitions. [2022-07-21 09:18:37,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 368 transitions, 3690 flow [2022-07-21 09:18:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:18:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:18:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1659 transitions. [2022-07-21 09:18:37,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5693205216197667 [2022-07-21 09:18:37,369 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1659 transitions. [2022-07-21 09:18:37,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1659 transitions. [2022-07-21 09:18:37,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:37,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1659 transitions. [2022-07-21 09:18:37,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.516129032258064) internal successors, (1659), 31 states have internal predecessors, (1659), 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) [2022-07-21 09:18:37,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:37,372 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:18:37,372 INFO L186 Difference]: Start difference. First operand has 317 places, 300 transitions, 2564 flow. Second operand 31 states and 1659 transitions. [2022-07-21 09:18:37,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 368 transitions, 3690 flow [2022-07-21 09:18:37,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 368 transitions, 3468 flow, removed 65 selfloop flow, removed 27 redundant places. [2022-07-21 09:18:37,406 INFO L242 Difference]: Finished difference. Result has 324 places, 305 transitions, 2750 flow [2022-07-21 09:18:37,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2750, PETRI_PLACES=324, PETRI_TRANSITIONS=305} [2022-07-21 09:18:37,407 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 236 predicate places. [2022-07-21 09:18:37,407 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 305 transitions, 2750 flow [2022-07-21 09:18:37,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:37,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:37,407 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] [2022-07-21 09:18:37,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-21 09:18:37,407 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash 128406850, now seen corresponding path program 48 times [2022-07-21 09:18:37,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:37,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485562193] [2022-07-21 09:18:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:37,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:37,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:37,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485562193] [2022-07-21 09:18:37,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485562193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:37,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:37,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:37,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623021418] [2022-07-21 09:18:37,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:37,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:37,683 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:37,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 305 transitions, 2750 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:37,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:37,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:37,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:38,781 INFO L129 PetriNetUnfolder]: 317/910 cut-off events. [2022-07-21 09:18:38,782 INFO L130 PetriNetUnfolder]: For 7649/7649 co-relation queries the response was YES. [2022-07-21 09:18:38,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 910 events. 317/910 cut-off events. For 7649/7649 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4904 event pairs, 58 based on Foata normal form. 1/909 useless extension candidates. Maximal degree in co-relation 5282. Up to 571 conditions per place. [2022-07-21 09:18:38,790 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 209 selfloop transitions, 108 changer transitions 24/380 dead transitions. [2022-07-21 09:18:38,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 380 transitions, 4386 flow [2022-07-21 09:18:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:18:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:18:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1970 transitions. [2022-07-21 09:18:38,792 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5664174813110984 [2022-07-21 09:18:38,792 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1970 transitions. [2022-07-21 09:18:38,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1970 transitions. [2022-07-21 09:18:38,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:38,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1970 transitions. [2022-07-21 09:18:38,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.24324324324324) internal successors, (1970), 37 states have internal predecessors, (1970), 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) [2022-07-21 09:18:38,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:18:38,796 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:18:38,796 INFO L186 Difference]: Start difference. First operand has 324 places, 305 transitions, 2750 flow. Second operand 37 states and 1970 transitions. [2022-07-21 09:18:38,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 380 transitions, 4386 flow [2022-07-21 09:18:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 380 transitions, 4148 flow, removed 47 selfloop flow, removed 28 redundant places. [2022-07-21 09:18:38,840 INFO L242 Difference]: Finished difference. Result has 331 places, 332 transitions, 3338 flow [2022-07-21 09:18:38,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3338, PETRI_PLACES=331, PETRI_TRANSITIONS=332} [2022-07-21 09:18:38,841 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 243 predicate places. [2022-07-21 09:18:38,841 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 332 transitions, 3338 flow [2022-07-21 09:18:38,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:38,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:38,842 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] [2022-07-21 09:18:38,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-21 09:18:38,842 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:38,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:38,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1004643942, now seen corresponding path program 49 times [2022-07-21 09:18:38,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:38,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173562160] [2022-07-21 09:18:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:38,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:39,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:39,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173562160] [2022-07-21 09:18:39,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173562160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:39,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:39,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:18:39,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269869498] [2022-07-21 09:18:39,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:39,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:18:39,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:18:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:18:39,123 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:39,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 332 transitions, 3338 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:39,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:39,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:39,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:42,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:18:42,757 INFO L129 PetriNetUnfolder]: 353/992 cut-off events. [2022-07-21 09:18:42,757 INFO L130 PetriNetUnfolder]: For 10834/10834 co-relation queries the response was YES. [2022-07-21 09:18:42,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6264 conditions, 992 events. 353/992 cut-off events. For 10834/10834 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 5428 event pairs, 40 based on Foata normal form. 1/991 useless extension candidates. Maximal degree in co-relation 6169. Up to 635 conditions per place. [2022-07-21 09:18:42,765 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 240 selfloop transitions, 134 changer transitions 22/435 dead transitions. [2022-07-21 09:18:42,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 435 transitions, 5457 flow [2022-07-21 09:18:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 09:18:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-21 09:18:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2728 transitions. [2022-07-21 09:18:42,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.55810147299509 [2022-07-21 09:18:42,767 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2728 transitions. [2022-07-21 09:18:42,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2728 transitions. [2022-07-21 09:18:42,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:42,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2728 transitions. [2022-07-21 09:18:42,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 52.46153846153846) internal successors, (2728), 52 states have internal predecessors, (2728), 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) [2022-07-21 09:18:42,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 94.0) internal successors, (4982), 53 states have internal predecessors, (4982), 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) [2022-07-21 09:18:42,772 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 94.0) internal successors, (4982), 53 states have internal predecessors, (4982), 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) [2022-07-21 09:18:42,772 INFO L186 Difference]: Start difference. First operand has 331 places, 332 transitions, 3338 flow. Second operand 52 states and 2728 transitions. [2022-07-21 09:18:42,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 435 transitions, 5457 flow [2022-07-21 09:18:42,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 435 transitions, 4980 flow, removed 193 selfloop flow, removed 18 redundant places. [2022-07-21 09:18:42,825 INFO L242 Difference]: Finished difference. Result has 373 places, 394 transitions, 4177 flow [2022-07-21 09:18:42,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4177, PETRI_PLACES=373, PETRI_TRANSITIONS=394} [2022-07-21 09:18:42,825 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 285 predicate places. [2022-07-21 09:18:42,825 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 394 transitions, 4177 flow [2022-07-21 09:18:42,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:18:42,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:42,826 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] [2022-07-21 09:18:42,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-21 09:18:42,826 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:42,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1676177828, now seen corresponding path program 50 times [2022-07-21 09:18:42,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:42,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638271237] [2022-07-21 09:18:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:42,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:43,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:43,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638271237] [2022-07-21 09:18:43,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638271237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:43,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:43,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 09:18:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438301677] [2022-07-21 09:18:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:43,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:18:43,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:18:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:18:43,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:43,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 394 transitions, 4177 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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) [2022-07-21 09:18:43,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:43,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:43,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:44,112 INFO L129 PetriNetUnfolder]: 361/995 cut-off events. [2022-07-21 09:18:44,112 INFO L130 PetriNetUnfolder]: For 11756/11756 co-relation queries the response was YES. [2022-07-21 09:18:44,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6666 conditions, 995 events. 361/995 cut-off events. For 11756/11756 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5571 event pairs, 44 based on Foata normal form. 1/994 useless extension candidates. Maximal degree in co-relation 6558. Up to 678 conditions per place. [2022-07-21 09:18:44,122 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 276 selfloop transitions, 100 changer transitions 30/445 dead transitions. [2022-07-21 09:18:44,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 445 transitions, 5572 flow [2022-07-21 09:18:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:18:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:18:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1712 transitions. [2022-07-21 09:18:44,123 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2022-07-21 09:18:44,124 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1712 transitions. [2022-07-21 09:18:44,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1712 transitions. [2022-07-21 09:18:44,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:44,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1712 transitions. [2022-07-21 09:18:44,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.5) internal successors, (1712), 32 states have internal predecessors, (1712), 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) [2022-07-21 09:18:44,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:44,127 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:18:44,127 INFO L186 Difference]: Start difference. First operand has 373 places, 394 transitions, 4177 flow. Second operand 32 states and 1712 transitions. [2022-07-21 09:18:44,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 445 transitions, 5572 flow [2022-07-21 09:18:44,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 445 transitions, 4863 flow, removed 308 selfloop flow, removed 18 redundant places. [2022-07-21 09:18:44,197 INFO L242 Difference]: Finished difference. Result has 390 places, 402 transitions, 3896 flow [2022-07-21 09:18:44,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3896, PETRI_PLACES=390, PETRI_TRANSITIONS=402} [2022-07-21 09:18:44,198 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 302 predicate places. [2022-07-21 09:18:44,198 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 402 transitions, 3896 flow [2022-07-21 09:18:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 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) [2022-07-21 09:18:44,199 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:44,199 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] [2022-07-21 09:18:44,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-21 09:18:44,199 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash -159895870, now seen corresponding path program 51 times [2022-07-21 09:18:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:44,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430714171] [2022-07-21 09:18:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:44,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430714171] [2022-07-21 09:18:44,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430714171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:44,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:44,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839983458] [2022-07-21 09:18:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:44,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:44,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:44,473 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:44,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 402 transitions, 3896 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:44,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:44,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:44,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:45,544 INFO L129 PetriNetUnfolder]: 353/1011 cut-off events. [2022-07-21 09:18:45,544 INFO L130 PetriNetUnfolder]: For 11586/11586 co-relation queries the response was YES. [2022-07-21 09:18:45,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6450 conditions, 1011 events. 353/1011 cut-off events. For 11586/11586 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5727 event pairs, 46 based on Foata normal form. 1/1010 useless extension candidates. Maximal degree in co-relation 6333. Up to 689 conditions per place. [2022-07-21 09:18:45,556 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 269 selfloop transitions, 88 changer transitions 40/436 dead transitions. [2022-07-21 09:18:45,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 436 transitions, 4934 flow [2022-07-21 09:18:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:18:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:18:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1910 transitions. [2022-07-21 09:18:45,559 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5644208037825059 [2022-07-21 09:18:45,559 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1910 transitions. [2022-07-21 09:18:45,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1910 transitions. [2022-07-21 09:18:45,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:45,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1910 transitions. [2022-07-21 09:18:45,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.05555555555556) internal successors, (1910), 36 states have internal predecessors, (1910), 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) [2022-07-21 09:18:45,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:18:45,563 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:18:45,563 INFO L186 Difference]: Start difference. First operand has 390 places, 402 transitions, 3896 flow. Second operand 36 states and 1910 transitions. [2022-07-21 09:18:45,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 436 transitions, 4934 flow [2022-07-21 09:18:45,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 436 transitions, 4603 flow, removed 84 selfloop flow, removed 29 redundant places. [2022-07-21 09:18:45,632 INFO L242 Difference]: Finished difference. Result has 400 places, 386 transitions, 3738 flow [2022-07-21 09:18:45,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3738, PETRI_PLACES=400, PETRI_TRANSITIONS=386} [2022-07-21 09:18:45,633 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 312 predicate places. [2022-07-21 09:18:45,633 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 386 transitions, 3738 flow [2022-07-21 09:18:45,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:45,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:45,633 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] [2022-07-21 09:18:45,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-21 09:18:45,634 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1966332640, now seen corresponding path program 52 times [2022-07-21 09:18:45,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:45,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254710907] [2022-07-21 09:18:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:45,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:45,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254710907] [2022-07-21 09:18:45,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254710907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:45,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:45,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:45,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972733418] [2022-07-21 09:18:45,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:45,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:45,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:45,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:45,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:45,941 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:45,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 386 transitions, 3738 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:45,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:45,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:45,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:47,665 INFO L129 PetriNetUnfolder]: 389/1126 cut-off events. [2022-07-21 09:18:47,665 INFO L130 PetriNetUnfolder]: For 13917/13917 co-relation queries the response was YES. [2022-07-21 09:18:47,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7252 conditions, 1126 events. 389/1126 cut-off events. For 13917/13917 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6583 event pairs, 43 based on Foata normal form. 1/1125 useless extension candidates. Maximal degree in co-relation 7134. Up to 687 conditions per place. [2022-07-21 09:18:47,677 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 263 selfloop transitions, 162 changer transitions 23/487 dead transitions. [2022-07-21 09:18:47,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 487 transitions, 6048 flow [2022-07-21 09:18:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 09:18:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-21 09:18:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2427 transitions. [2022-07-21 09:18:47,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5612858464384829 [2022-07-21 09:18:47,679 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2427 transitions. [2022-07-21 09:18:47,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2427 transitions. [2022-07-21 09:18:47,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:47,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2427 transitions. [2022-07-21 09:18:47,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.76086956521739) internal successors, (2427), 46 states have internal predecessors, (2427), 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) [2022-07-21 09:18:47,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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) [2022-07-21 09:18:47,684 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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) [2022-07-21 09:18:47,684 INFO L186 Difference]: Start difference. First operand has 400 places, 386 transitions, 3738 flow. Second operand 46 states and 2427 transitions. [2022-07-21 09:18:47,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 487 transitions, 6048 flow [2022-07-21 09:18:47,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 487 transitions, 5775 flow, removed 40 selfloop flow, removed 35 redundant places. [2022-07-21 09:18:47,754 INFO L242 Difference]: Finished difference. Result has 407 places, 443 transitions, 4882 flow [2022-07-21 09:18:47,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4882, PETRI_PLACES=407, PETRI_TRANSITIONS=443} [2022-07-21 09:18:47,754 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 319 predicate places. [2022-07-21 09:18:47,754 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 443 transitions, 4882 flow [2022-07-21 09:18:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:47,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:47,755 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] [2022-07-21 09:18:47,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-21 09:18:47,755 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1334758656, now seen corresponding path program 53 times [2022-07-21 09:18:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:47,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060313022] [2022-07-21 09:18:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:48,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:48,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060313022] [2022-07-21 09:18:48,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060313022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:48,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:48,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170242252] [2022-07-21 09:18:48,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:48,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:48,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:48,045 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:48,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 443 transitions, 4882 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:48,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:48,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:48,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:49,192 INFO L129 PetriNetUnfolder]: 392/1118 cut-off events. [2022-07-21 09:18:49,193 INFO L130 PetriNetUnfolder]: For 15854/15854 co-relation queries the response was YES. [2022-07-21 09:18:49,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7668 conditions, 1118 events. 392/1118 cut-off events. For 15854/15854 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6559 event pairs, 51 based on Foata normal form. 1/1117 useless extension candidates. Maximal degree in co-relation 7548. Up to 748 conditions per place. [2022-07-21 09:18:49,205 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 311 selfloop transitions, 96 changer transitions 40/486 dead transitions. [2022-07-21 09:18:49,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 486 transitions, 6233 flow [2022-07-21 09:18:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:18:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:18:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1810 transitions. [2022-07-21 09:18:49,207 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5663329161451814 [2022-07-21 09:18:49,207 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1810 transitions. [2022-07-21 09:18:49,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1810 transitions. [2022-07-21 09:18:49,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:49,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1810 transitions. [2022-07-21 09:18:49,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.23529411764706) internal successors, (1810), 34 states have internal predecessors, (1810), 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) [2022-07-21 09:18:49,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:18:49,210 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:18:49,210 INFO L186 Difference]: Start difference. First operand has 407 places, 443 transitions, 4882 flow. Second operand 34 states and 1810 transitions. [2022-07-21 09:18:49,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 486 transitions, 6233 flow [2022-07-21 09:18:49,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 486 transitions, 5634 flow, removed 242 selfloop flow, removed 27 redundant places. [2022-07-21 09:18:49,291 INFO L242 Difference]: Finished difference. Result has 419 places, 437 transitions, 4528 flow [2022-07-21 09:18:49,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4528, PETRI_PLACES=419, PETRI_TRANSITIONS=437} [2022-07-21 09:18:49,291 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 331 predicate places. [2022-07-21 09:18:49,291 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 437 transitions, 4528 flow [2022-07-21 09:18:49,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:49,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:49,291 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] [2022-07-21 09:18:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-21 09:18:49,292 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash -351904270, now seen corresponding path program 54 times [2022-07-21 09:18:49,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612680923] [2022-07-21 09:18:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:49,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:49,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:49,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612680923] [2022-07-21 09:18:49,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612680923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:49,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:49,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:49,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225206117] [2022-07-21 09:18:49,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:49,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:49,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:49,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:49,563 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:49,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 437 transitions, 4528 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:49,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:49,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:49,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:51,545 INFO L129 PetriNetUnfolder]: 392/1123 cut-off events. [2022-07-21 09:18:51,545 INFO L130 PetriNetUnfolder]: For 14754/14754 co-relation queries the response was YES. [2022-07-21 09:18:51,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7577 conditions, 1123 events. 392/1123 cut-off events. For 14754/14754 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6611 event pairs, 46 based on Foata normal form. 1/1122 useless extension candidates. Maximal degree in co-relation 7449. Up to 727 conditions per place. [2022-07-21 09:18:51,556 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 296 selfloop transitions, 128 changer transitions 34/497 dead transitions. [2022-07-21 09:18:51,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 497 transitions, 6269 flow [2022-07-21 09:18:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:18:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-21 09:18:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2169 transitions. [2022-07-21 09:18:51,558 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5627919045147898 [2022-07-21 09:18:51,559 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2169 transitions. [2022-07-21 09:18:51,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2169 transitions. [2022-07-21 09:18:51,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:51,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2169 transitions. [2022-07-21 09:18:51,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.90243902439025) internal successors, (2169), 41 states have internal predecessors, (2169), 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) [2022-07-21 09:18:51,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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) [2022-07-21 09:18:51,563 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 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) [2022-07-21 09:18:51,563 INFO L186 Difference]: Start difference. First operand has 419 places, 437 transitions, 4528 flow. Second operand 41 states and 2169 transitions. [2022-07-21 09:18:51,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 497 transitions, 6269 flow [2022-07-21 09:18:51,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 497 transitions, 5938 flow, removed 50 selfloop flow, removed 34 redundant places. [2022-07-21 09:18:51,643 INFO L242 Difference]: Finished difference. Result has 425 places, 447 transitions, 4770 flow [2022-07-21 09:18:51,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4770, PETRI_PLACES=425, PETRI_TRANSITIONS=447} [2022-07-21 09:18:51,644 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 337 predicate places. [2022-07-21 09:18:51,644 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 447 transitions, 4770 flow [2022-07-21 09:18:51,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:51,644 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:51,644 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] [2022-07-21 09:18:51,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-21 09:18:51,645 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash -600969730, now seen corresponding path program 55 times [2022-07-21 09:18:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:51,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983185800] [2022-07-21 09:18:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:51,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983185800] [2022-07-21 09:18:51,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983185800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:51,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:51,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000645672] [2022-07-21 09:18:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:51,941 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:51,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 447 transitions, 4770 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:51,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:51,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:51,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:53,368 INFO L129 PetriNetUnfolder]: 392/1113 cut-off events. [2022-07-21 09:18:53,369 INFO L130 PetriNetUnfolder]: For 15537/15537 co-relation queries the response was YES. [2022-07-21 09:18:53,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7718 conditions, 1113 events. 392/1113 cut-off events. For 15537/15537 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6518 event pairs, 45 based on Foata normal form. 1/1111 useless extension candidates. Maximal degree in co-relation 7591. Up to 728 conditions per place. [2022-07-21 09:18:53,382 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 292 selfloop transitions, 143 changer transitions 32/506 dead transitions. [2022-07-21 09:18:53,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 506 transitions, 6539 flow [2022-07-21 09:18:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 09:18:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-21 09:18:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2474 transitions. [2022-07-21 09:18:53,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5599818922589407 [2022-07-21 09:18:53,384 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2474 transitions. [2022-07-21 09:18:53,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2474 transitions. [2022-07-21 09:18:53,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:53,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2474 transitions. [2022-07-21 09:18:53,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 52.638297872340424) internal successors, (2474), 47 states have internal predecessors, (2474), 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) [2022-07-21 09:18:53,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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) [2022-07-21 09:18:53,388 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 94.0) internal successors, (4512), 48 states have internal predecessors, (4512), 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) [2022-07-21 09:18:53,388 INFO L186 Difference]: Start difference. First operand has 425 places, 447 transitions, 4770 flow. Second operand 47 states and 2474 transitions. [2022-07-21 09:18:53,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 506 transitions, 6539 flow [2022-07-21 09:18:53,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 506 transitions, 6214 flow, removed 83 selfloop flow, removed 35 redundant places. [2022-07-21 09:18:53,482 INFO L242 Difference]: Finished difference. Result has 440 places, 459 transitions, 5102 flow [2022-07-21 09:18:53,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5102, PETRI_PLACES=440, PETRI_TRANSITIONS=459} [2022-07-21 09:18:53,483 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 352 predicate places. [2022-07-21 09:18:53,483 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 459 transitions, 5102 flow [2022-07-21 09:18:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:53,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:53,483 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] [2022-07-21 09:18:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-21 09:18:53,484 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1715343316, now seen corresponding path program 56 times [2022-07-21 09:18:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:53,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968110453] [2022-07-21 09:18:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:53,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:53,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968110453] [2022-07-21 09:18:53,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968110453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:53,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:53,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987485905] [2022-07-21 09:18:53,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:53,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:53,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:53,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:53,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:53,775 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:53,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 459 transitions, 5102 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:53,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:53,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:53,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:55,987 INFO L129 PetriNetUnfolder]: 392/1122 cut-off events. [2022-07-21 09:18:55,987 INFO L130 PetriNetUnfolder]: For 15288/15288 co-relation queries the response was YES. [2022-07-21 09:18:55,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7822 conditions, 1122 events. 392/1122 cut-off events. For 15288/15288 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6682 event pairs, 38 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 7691. Up to 753 conditions per place. [2022-07-21 09:18:55,999 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 326 selfloop transitions, 117 changer transitions 31/513 dead transitions. [2022-07-21 09:18:55,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 513 transitions, 6755 flow [2022-07-21 09:18:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:18:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:18:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2066 transitions. [2022-07-21 09:18:56,000 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.563557010365521 [2022-07-21 09:18:56,000 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2066 transitions. [2022-07-21 09:18:56,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2066 transitions. [2022-07-21 09:18:56,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:56,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2066 transitions. [2022-07-21 09:18:56,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.97435897435897) internal successors, (2066), 39 states have internal predecessors, (2066), 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) [2022-07-21 09:18:56,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:18:56,004 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:18:56,005 INFO L186 Difference]: Start difference. First operand has 440 places, 459 transitions, 5102 flow. Second operand 39 states and 2066 transitions. [2022-07-21 09:18:56,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 513 transitions, 6755 flow [2022-07-21 09:18:56,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 513 transitions, 6323 flow, removed 121 selfloop flow, removed 36 redundant places. [2022-07-21 09:18:56,108 INFO L242 Difference]: Finished difference. Result has 444 places, 466 transitions, 5167 flow [2022-07-21 09:18:56,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4707, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5167, PETRI_PLACES=444, PETRI_TRANSITIONS=466} [2022-07-21 09:18:56,108 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 356 predicate places. [2022-07-21 09:18:56,109 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 466 transitions, 5167 flow [2022-07-21 09:18:56,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:56,109 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:56,109 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] [2022-07-21 09:18:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-21 09:18:56,109 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 21902956, now seen corresponding path program 57 times [2022-07-21 09:18:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:56,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638029779] [2022-07-21 09:18:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:56,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638029779] [2022-07-21 09:18:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638029779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:56,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:56,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:18:56,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044115295] [2022-07-21 09:18:56,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:56,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:18:56,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:18:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:18:56,409 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:56,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 466 transitions, 5167 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:56,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:56,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:56,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:57,869 INFO L129 PetriNetUnfolder]: 387/1134 cut-off events. [2022-07-21 09:18:57,869 INFO L130 PetriNetUnfolder]: For 15596/15596 co-relation queries the response was YES. [2022-07-21 09:18:57,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7789 conditions, 1134 events. 387/1134 cut-off events. For 15596/15596 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6776 event pairs, 48 based on Foata normal form. 1/1133 useless extension candidates. Maximal degree in co-relation 7657. Up to 737 conditions per place. [2022-07-21 09:18:57,884 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 302 selfloop transitions, 128 changer transitions 36/505 dead transitions. [2022-07-21 09:18:57,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 505 transitions, 6502 flow [2022-07-21 09:18:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 09:18:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-21 09:18:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2315 transitions. [2022-07-21 09:18:57,885 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5597195357833655 [2022-07-21 09:18:57,885 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2315 transitions. [2022-07-21 09:18:57,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2315 transitions. [2022-07-21 09:18:57,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:57,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2315 transitions. [2022-07-21 09:18:57,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 52.61363636363637) internal successors, (2315), 44 states have internal predecessors, (2315), 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) [2022-07-21 09:18:57,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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) [2022-07-21 09:18:57,889 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 94.0) internal successors, (4230), 45 states have internal predecessors, (4230), 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) [2022-07-21 09:18:57,889 INFO L186 Difference]: Start difference. First operand has 444 places, 466 transitions, 5167 flow. Second operand 44 states and 2315 transitions. [2022-07-21 09:18:57,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 505 transitions, 6502 flow [2022-07-21 09:18:57,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 505 transitions, 6264 flow, removed 54 selfloop flow, removed 34 redundant places. [2022-07-21 09:18:57,980 INFO L242 Difference]: Finished difference. Result has 456 places, 458 transitions, 5216 flow [2022-07-21 09:18:57,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5216, PETRI_PLACES=456, PETRI_TRANSITIONS=458} [2022-07-21 09:18:57,980 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 368 predicate places. [2022-07-21 09:18:57,980 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 458 transitions, 5216 flow [2022-07-21 09:18:57,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:18:57,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:57,981 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] [2022-07-21 09:18:57,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-21 09:18:57,981 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1894883960, now seen corresponding path program 58 times [2022-07-21 09:18:57,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:57,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554358152] [2022-07-21 09:18:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:58,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554358152] [2022-07-21 09:18:58,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554358152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:58,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:58,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:58,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201877464] [2022-07-21 09:18:58,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:58,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:58,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:58,264 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:58,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 458 transitions, 5216 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:58,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:58,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:58,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:59,425 INFO L129 PetriNetUnfolder]: 384/1137 cut-off events. [2022-07-21 09:18:59,425 INFO L130 PetriNetUnfolder]: For 15888/15888 co-relation queries the response was YES. [2022-07-21 09:18:59,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1137 events. 384/1137 cut-off events. For 15888/15888 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6835 event pairs, 47 based on Foata normal form. 1/1136 useless extension candidates. Maximal degree in co-relation 7790. Up to 760 conditions per place. [2022-07-21 09:18:59,440 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 330 selfloop transitions, 103 changer transitions 27/499 dead transitions. [2022-07-21 09:18:59,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 499 transitions, 6666 flow [2022-07-21 09:18:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:18:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 09:18:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2022-07-21 09:18:59,441 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2022-07-21 09:18:59,442 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2022-07-21 09:18:59,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2022-07-21 09:18:59,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:59,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2022-07-21 09:18:59,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 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) [2022-07-21 09:18:59,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:18:59,445 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:18:59,445 INFO L186 Difference]: Start difference. First operand has 456 places, 458 transitions, 5216 flow. Second operand 33 states and 1758 transitions. [2022-07-21 09:18:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 499 transitions, 6666 flow [2022-07-21 09:18:59,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 499 transitions, 6282 flow, removed 23 selfloop flow, removed 45 redundant places. [2022-07-21 09:18:59,563 INFO L242 Difference]: Finished difference. Result has 440 places, 461 transitions, 5196 flow [2022-07-21 09:18:59,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5196, PETRI_PLACES=440, PETRI_TRANSITIONS=461} [2022-07-21 09:18:59,563 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 352 predicate places. [2022-07-21 09:18:59,564 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 461 transitions, 5196 flow [2022-07-21 09:18:59,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:59,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:59,564 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] [2022-07-21 09:18:59,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-21 09:18:59,564 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:59,565 INFO L85 PathProgramCache]: Analyzing trace with hash 206855110, now seen corresponding path program 59 times [2022-07-21 09:18:59,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:59,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650320160] [2022-07-21 09:18:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:59,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:59,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650320160] [2022-07-21 09:18:59,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650320160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:18:59,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:18:59,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:18:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000990814] [2022-07-21 09:18:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:18:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:18:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:18:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:18:59,849 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:18:59,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 461 transitions, 5196 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:18:59,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:59,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:18:59,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:00,997 INFO L129 PetriNetUnfolder]: 398/1168 cut-off events. [2022-07-21 09:19:00,997 INFO L130 PetriNetUnfolder]: For 16743/16743 co-relation queries the response was YES. [2022-07-21 09:19:01,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8142 conditions, 1168 events. 398/1168 cut-off events. For 16743/16743 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7014 event pairs, 40 based on Foata normal form. 1/1167 useless extension candidates. Maximal degree in co-relation 8007. Up to 775 conditions per place. [2022-07-21 09:19:01,010 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 347 selfloop transitions, 132 changer transitions 19/537 dead transitions. [2022-07-21 09:19:01,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 537 transitions, 7152 flow [2022-07-21 09:19:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:19:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:19:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1810 transitions. [2022-07-21 09:19:01,012 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5663329161451814 [2022-07-21 09:19:01,012 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1810 transitions. [2022-07-21 09:19:01,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1810 transitions. [2022-07-21 09:19:01,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:01,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1810 transitions. [2022-07-21 09:19:01,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.23529411764706) internal successors, (1810), 34 states have internal predecessors, (1810), 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) [2022-07-21 09:19:01,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:01,015 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:01,015 INFO L186 Difference]: Start difference. First operand has 440 places, 461 transitions, 5196 flow. Second operand 34 states and 1810 transitions. [2022-07-21 09:19:01,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 537 transitions, 7152 flow [2022-07-21 09:19:01,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 537 transitions, 6903 flow, removed 48 selfloop flow, removed 29 redundant places. [2022-07-21 09:19:01,111 INFO L242 Difference]: Finished difference. Result has 447 places, 493 transitions, 5829 flow [2022-07-21 09:19:01,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4965, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5829, PETRI_PLACES=447, PETRI_TRANSITIONS=493} [2022-07-21 09:19:01,112 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 359 predicate places. [2022-07-21 09:19:01,112 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 493 transitions, 5829 flow [2022-07-21 09:19:01,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:01,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:01,112 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] [2022-07-21 09:19:01,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-21 09:19:01,112 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1878075916, now seen corresponding path program 60 times [2022-07-21 09:19:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:01,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015757288] [2022-07-21 09:19:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:01,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015757288] [2022-07-21 09:19:01,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015757288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:01,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:01,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:19:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424600799] [2022-07-21 09:19:01,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:19:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:19:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:19:01,397 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:01,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 493 transitions, 5829 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:01,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:01,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:01,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:02,622 INFO L129 PetriNetUnfolder]: 405/1207 cut-off events. [2022-07-21 09:19:02,622 INFO L130 PetriNetUnfolder]: For 17975/17975 co-relation queries the response was YES. [2022-07-21 09:19:02,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8525 conditions, 1207 events. 405/1207 cut-off events. For 17975/17975 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7477 event pairs, 46 based on Foata normal form. 1/1206 useless extension candidates. Maximal degree in co-relation 8388. Up to 831 conditions per place. [2022-07-21 09:19:02,636 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 373 selfloop transitions, 90 changer transitions 31/533 dead transitions. [2022-07-21 09:19:02,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 533 transitions, 7342 flow [2022-07-21 09:19:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:19:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:19:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1854 transitions. [2022-07-21 09:19:02,638 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5635258358662614 [2022-07-21 09:19:02,638 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1854 transitions. [2022-07-21 09:19:02,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1854 transitions. [2022-07-21 09:19:02,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:02,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1854 transitions. [2022-07-21 09:19:02,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.97142857142857) internal successors, (1854), 35 states have internal predecessors, (1854), 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) [2022-07-21 09:19:02,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:19:02,642 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:19:02,642 INFO L186 Difference]: Start difference. First operand has 447 places, 493 transitions, 5829 flow. Second operand 35 states and 1854 transitions. [2022-07-21 09:19:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 533 transitions, 7342 flow [2022-07-21 09:19:02,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 533 transitions, 7040 flow, removed 82 selfloop flow, removed 26 redundant places. [2022-07-21 09:19:02,768 INFO L242 Difference]: Finished difference. Result has 460 places, 491 transitions, 5819 flow [2022-07-21 09:19:02,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5549, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5819, PETRI_PLACES=460, PETRI_TRANSITIONS=491} [2022-07-21 09:19:02,769 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 372 predicate places. [2022-07-21 09:19:02,769 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 491 transitions, 5819 flow [2022-07-21 09:19:02,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:02,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:02,769 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] [2022-07-21 09:19:02,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-21 09:19:02,769 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:02,770 INFO L85 PathProgramCache]: Analyzing trace with hash 746385218, now seen corresponding path program 61 times [2022-07-21 09:19:02,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:02,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400078091] [2022-07-21 09:19:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:02,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:03,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:03,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400078091] [2022-07-21 09:19:03,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400078091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:03,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:03,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621980992] [2022-07-21 09:19:03,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:03,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:03,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:03,055 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:03,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 491 transitions, 5819 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:03,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:03,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:03,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:04,173 INFO L129 PetriNetUnfolder]: 395/1171 cut-off events. [2022-07-21 09:19:04,173 INFO L130 PetriNetUnfolder]: For 17241/17241 co-relation queries the response was YES. [2022-07-21 09:19:04,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8397 conditions, 1171 events. 395/1171 cut-off events. For 17241/17241 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7105 event pairs, 55 based on Foata normal form. 1/1170 useless extension candidates. Maximal degree in co-relation 8254. Up to 792 conditions per place. [2022-07-21 09:19:04,190 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 360 selfloop transitions, 110 changer transitions 18/527 dead transitions. [2022-07-21 09:19:04,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 527 transitions, 7306 flow [2022-07-21 09:19:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:19:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:19:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1707 transitions. [2022-07-21 09:19:04,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5674867021276596 [2022-07-21 09:19:04,192 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1707 transitions. [2022-07-21 09:19:04,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1707 transitions. [2022-07-21 09:19:04,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:04,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1707 transitions. [2022-07-21 09:19:04,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.34375) internal successors, (1707), 32 states have internal predecessors, (1707), 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) [2022-07-21 09:19:04,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:19:04,195 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:19:04,195 INFO L186 Difference]: Start difference. First operand has 460 places, 491 transitions, 5819 flow. Second operand 32 states and 1707 transitions. [2022-07-21 09:19:04,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 527 transitions, 7306 flow [2022-07-21 09:19:04,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 527 transitions, 7055 flow, removed 45 selfloop flow, removed 32 redundant places. [2022-07-21 09:19:04,314 INFO L242 Difference]: Finished difference. Result has 456 places, 496 transitions, 5984 flow [2022-07-21 09:19:04,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5984, PETRI_PLACES=456, PETRI_TRANSITIONS=496} [2022-07-21 09:19:04,315 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 368 predicate places. [2022-07-21 09:19:04,315 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 496 transitions, 5984 flow [2022-07-21 09:19:04,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:04,315 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:04,315 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] [2022-07-21 09:19:04,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-21 09:19:04,316 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1193000904, now seen corresponding path program 62 times [2022-07-21 09:19:04,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:04,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084660880] [2022-07-21 09:19:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:04,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:04,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:04,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084660880] [2022-07-21 09:19:04,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084660880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:04,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:04,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:19:04,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634513949] [2022-07-21 09:19:04,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:04,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:19:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:19:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:19:04,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:04,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 496 transitions, 5984 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:04,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:04,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:04,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:06,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:07,842 INFO L129 PetriNetUnfolder]: 406/1225 cut-off events. [2022-07-21 09:19:07,842 INFO L130 PetriNetUnfolder]: For 18434/18434 co-relation queries the response was YES. [2022-07-21 09:19:07,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8704 conditions, 1225 events. 406/1225 cut-off events. For 18434/18434 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7635 event pairs, 47 based on Foata normal form. 1/1224 useless extension candidates. Maximal degree in co-relation 8562. Up to 847 conditions per place. [2022-07-21 09:19:07,855 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 388 selfloop transitions, 94 changer transitions 23/544 dead transitions. [2022-07-21 09:19:07,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 544 transitions, 7612 flow [2022-07-21 09:19:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:19:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:19:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1900 transitions. [2022-07-21 09:19:07,856 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5614657210401891 [2022-07-21 09:19:07,856 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1900 transitions. [2022-07-21 09:19:07,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1900 transitions. [2022-07-21 09:19:07,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:07,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1900 transitions. [2022-07-21 09:19:07,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.77777777777778) internal successors, (1900), 36 states have internal predecessors, (1900), 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) [2022-07-21 09:19:07,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:19:07,859 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:19:07,859 INFO L186 Difference]: Start difference. First operand has 456 places, 496 transitions, 5984 flow. Second operand 36 states and 1900 transitions. [2022-07-21 09:19:07,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 544 transitions, 7612 flow [2022-07-21 09:19:07,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 544 transitions, 7274 flow, removed 95 selfloop flow, removed 25 redundant places. [2022-07-21 09:19:07,982 INFO L242 Difference]: Finished difference. Result has 477 places, 509 transitions, 6199 flow [2022-07-21 09:19:07,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6199, PETRI_PLACES=477, PETRI_TRANSITIONS=509} [2022-07-21 09:19:07,983 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 389 predicate places. [2022-07-21 09:19:07,983 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 509 transitions, 6199 flow [2022-07-21 09:19:07,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:07,983 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:07,983 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] [2022-07-21 09:19:07,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-21 09:19:07,983 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -980992038, now seen corresponding path program 63 times [2022-07-21 09:19:07,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238221927] [2022-07-21 09:19:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:07,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:08,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238221927] [2022-07-21 09:19:08,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238221927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:08,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:08,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:08,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517690675] [2022-07-21 09:19:08,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:08,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:08,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:08,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:08,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 509 transitions, 6199 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:08,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:08,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:08,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:09,686 INFO L129 PetriNetUnfolder]: 419/1266 cut-off events. [2022-07-21 09:19:09,686 INFO L130 PetriNetUnfolder]: For 18868/18868 co-relation queries the response was YES. [2022-07-21 09:19:09,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9058 conditions, 1266 events. 419/1266 cut-off events. For 18868/18868 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7967 event pairs, 48 based on Foata normal form. 1/1265 useless extension candidates. Maximal degree in co-relation 8904. Up to 851 conditions per place. [2022-07-21 09:19:09,702 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 389 selfloop transitions, 121 changer transitions 26/575 dead transitions. [2022-07-21 09:19:09,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 575 transitions, 8161 flow [2022-07-21 09:19:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:19:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:19:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2012 transitions. [2022-07-21 09:19:09,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5632698768197089 [2022-07-21 09:19:09,704 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2012 transitions. [2022-07-21 09:19:09,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2012 transitions. [2022-07-21 09:19:09,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:09,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2012 transitions. [2022-07-21 09:19:09,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.94736842105263) internal successors, (2012), 38 states have internal predecessors, (2012), 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) [2022-07-21 09:19:09,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:19:09,707 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:19:09,707 INFO L186 Difference]: Start difference. First operand has 477 places, 509 transitions, 6199 flow. Second operand 38 states and 2012 transitions. [2022-07-21 09:19:09,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 575 transitions, 8161 flow [2022-07-21 09:19:09,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 575 transitions, 7951 flow, removed 51 selfloop flow, removed 25 redundant places. [2022-07-21 09:19:09,837 INFO L242 Difference]: Finished difference. Result has 497 places, 534 transitions, 6801 flow [2022-07-21 09:19:09,837 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6023, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6801, PETRI_PLACES=497, PETRI_TRANSITIONS=534} [2022-07-21 09:19:09,837 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 409 predicate places. [2022-07-21 09:19:09,837 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 534 transitions, 6801 flow [2022-07-21 09:19:09,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:09,838 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:09,838 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] [2022-07-21 09:19:09,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-21 09:19:09,838 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 936186058, now seen corresponding path program 64 times [2022-07-21 09:19:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:09,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627356318] [2022-07-21 09:19:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:10,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627356318] [2022-07-21 09:19:10,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627356318] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:10,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:10,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:19:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191443749] [2022-07-21 09:19:10,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:19:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:19:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:19:10,110 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:10,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 534 transitions, 6801 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:10,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:10,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:10,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:13,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:13,548 INFO L129 PetriNetUnfolder]: 418/1260 cut-off events. [2022-07-21 09:19:13,548 INFO L130 PetriNetUnfolder]: For 19569/19569 co-relation queries the response was YES. [2022-07-21 09:19:13,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9296 conditions, 1260 events. 418/1260 cut-off events. For 19569/19569 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7992 event pairs, 61 based on Foata normal form. 1/1258 useless extension candidates. Maximal degree in co-relation 9134. Up to 872 conditions per place. [2022-07-21 09:19:13,600 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 404 selfloop transitions, 109 changer transitions 23/575 dead transitions. [2022-07-21 09:19:13,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 575 transitions, 8423 flow [2022-07-21 09:19:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:19:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:19:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1951 transitions. [2022-07-21 09:19:13,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5609545715928694 [2022-07-21 09:19:13,602 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1951 transitions. [2022-07-21 09:19:13,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1951 transitions. [2022-07-21 09:19:13,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:13,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1951 transitions. [2022-07-21 09:19:13,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.729729729729726) internal successors, (1951), 37 states have internal predecessors, (1951), 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) [2022-07-21 09:19:13,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:19:13,605 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:19:13,605 INFO L186 Difference]: Start difference. First operand has 497 places, 534 transitions, 6801 flow. Second operand 37 states and 1951 transitions. [2022-07-21 09:19:13,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 575 transitions, 8423 flow [2022-07-21 09:19:13,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 575 transitions, 8206 flow, removed 61 selfloop flow, removed 25 redundant places. [2022-07-21 09:19:13,756 INFO L242 Difference]: Finished difference. Result has 513 places, 540 transitions, 7021 flow [2022-07-21 09:19:13,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6618, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7021, PETRI_PLACES=513, PETRI_TRANSITIONS=540} [2022-07-21 09:19:13,757 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 425 predicate places. [2022-07-21 09:19:13,757 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 540 transitions, 7021 flow [2022-07-21 09:19:13,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:13,757 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:13,757 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] [2022-07-21 09:19:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-21 09:19:13,758 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:13,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:13,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1143551806, now seen corresponding path program 65 times [2022-07-21 09:19:13,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:13,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102102920] [2022-07-21 09:19:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:14,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102102920] [2022-07-21 09:19:14,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102102920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:14,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:14,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:19:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436231597] [2022-07-21 09:19:14,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:14,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:19:14,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:19:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:19:14,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:14,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 540 transitions, 7021 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:14,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:14,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:14,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:16,751 INFO L129 PetriNetUnfolder]: 452/1372 cut-off events. [2022-07-21 09:19:16,752 INFO L130 PetriNetUnfolder]: For 23126/23126 co-relation queries the response was YES. [2022-07-21 09:19:16,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10271 conditions, 1372 events. 452/1372 cut-off events. For 23126/23126 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9002 event pairs, 50 based on Foata normal form. 1/1371 useless extension candidates. Maximal degree in co-relation 10103. Up to 861 conditions per place. [2022-07-21 09:19:16,773 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 405 selfloop transitions, 180 changer transitions 25/649 dead transitions. [2022-07-21 09:19:16,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 649 transitions, 9838 flow [2022-07-21 09:19:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 09:19:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-21 09:19:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2575 transitions. [2022-07-21 09:19:16,775 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5590534085974815 [2022-07-21 09:19:16,775 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2575 transitions. [2022-07-21 09:19:16,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2575 transitions. [2022-07-21 09:19:16,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:16,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2575 transitions. [2022-07-21 09:19:16,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 52.55102040816327) internal successors, (2575), 49 states have internal predecessors, (2575), 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) [2022-07-21 09:19:16,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 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) [2022-07-21 09:19:16,780 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 94.0) internal successors, (4700), 50 states have internal predecessors, (4700), 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) [2022-07-21 09:19:16,780 INFO L186 Difference]: Start difference. First operand has 513 places, 540 transitions, 7021 flow. Second operand 49 states and 2575 transitions. [2022-07-21 09:19:16,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 649 transitions, 9838 flow [2022-07-21 09:19:16,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 649 transitions, 9519 flow, removed 81 selfloop flow, removed 31 redundant places. [2022-07-21 09:19:16,982 INFO L242 Difference]: Finished difference. Result has 536 places, 596 transitions, 8184 flow [2022-07-21 09:19:16,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=8184, PETRI_PLACES=536, PETRI_TRANSITIONS=596} [2022-07-21 09:19:16,983 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 448 predicate places. [2022-07-21 09:19:16,983 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 596 transitions, 8184 flow [2022-07-21 09:19:16,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:16,983 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:16,983 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] [2022-07-21 09:19:16,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-21 09:19:16,984 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash 519114690, now seen corresponding path program 66 times [2022-07-21 09:19:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:16,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038135140] [2022-07-21 09:19:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:17,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:17,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038135140] [2022-07-21 09:19:17,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038135140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:17,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:17,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:19:17,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629673118] [2022-07-21 09:19:17,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:17,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:19:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:17,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:19:17,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:19:17,290 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:17,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 596 transitions, 8184 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:17,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:17,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:17,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:19,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:20,650 INFO L129 PetriNetUnfolder]: 440/1362 cut-off events. [2022-07-21 09:19:20,650 INFO L130 PetriNetUnfolder]: For 23738/23738 co-relation queries the response was YES. [2022-07-21 09:19:20,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10373 conditions, 1362 events. 440/1362 cut-off events. For 23738/23738 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9022 event pairs, 55 based on Foata normal form. 1/1361 useless extension candidates. Maximal degree in co-relation 10199. Up to 973 conditions per place. [2022-07-21 09:19:20,676 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 479 selfloop transitions, 85 changer transitions 19/622 dead transitions. [2022-07-21 09:19:20,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 622 transitions, 9528 flow [2022-07-21 09:19:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:19:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:19:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1788 transitions. [2022-07-21 09:19:20,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5594493116395495 [2022-07-21 09:19:20,677 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1788 transitions. [2022-07-21 09:19:20,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1788 transitions. [2022-07-21 09:19:20,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:20,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1788 transitions. [2022-07-21 09:19:20,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.588235294117645) internal successors, (1788), 34 states have internal predecessors, (1788), 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) [2022-07-21 09:19:20,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:20,681 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:20,681 INFO L186 Difference]: Start difference. First operand has 536 places, 596 transitions, 8184 flow. Second operand 34 states and 1788 transitions. [2022-07-21 09:19:20,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 622 transitions, 9528 flow [2022-07-21 09:19:20,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 622 transitions, 9035 flow, removed 165 selfloop flow, removed 33 redundant places. [2022-07-21 09:19:20,932 INFO L242 Difference]: Finished difference. Result has 537 places, 593 transitions, 7840 flow [2022-07-21 09:19:20,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7840, PETRI_PLACES=537, PETRI_TRANSITIONS=593} [2022-07-21 09:19:20,934 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 449 predicate places. [2022-07-21 09:19:20,934 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 593 transitions, 7840 flow [2022-07-21 09:19:20,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:20,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:20,934 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] [2022-07-21 09:19:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-21 09:19:20,935 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:20,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1586708886, now seen corresponding path program 67 times [2022-07-21 09:19:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757924654] [2022-07-21 09:19:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:20,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:21,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:21,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757924654] [2022-07-21 09:19:21,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757924654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:21,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:21,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:19:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998644235] [2022-07-21 09:19:21,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:21,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:19:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:19:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:19:21,280 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:21,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 593 transitions, 7840 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:19:21,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:21,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:21,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:23,366 INFO L129 PetriNetUnfolder]: 440/1367 cut-off events. [2022-07-21 09:19:23,366 INFO L130 PetriNetUnfolder]: For 23421/23421 co-relation queries the response was YES. [2022-07-21 09:19:23,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10341 conditions, 1367 events. 440/1367 cut-off events. For 23421/23421 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8994 event pairs, 44 based on Foata normal form. 1/1366 useless extension candidates. Maximal degree in co-relation 10161. Up to 876 conditions per place. [2022-07-21 09:19:23,385 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 430 selfloop transitions, 149 changer transitions 24/642 dead transitions. [2022-07-21 09:19:23,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 642 transitions, 9736 flow [2022-07-21 09:19:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 09:19:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-21 09:19:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2663 transitions. [2022-07-21 09:19:23,387 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5554860241969128 [2022-07-21 09:19:23,387 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2663 transitions. [2022-07-21 09:19:23,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2663 transitions. [2022-07-21 09:19:23,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:23,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2663 transitions. [2022-07-21 09:19:23,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 52.21568627450981) internal successors, (2663), 51 states have internal predecessors, (2663), 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) [2022-07-21 09:19:23,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 94.0) internal successors, (4888), 52 states have internal predecessors, (4888), 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) [2022-07-21 09:19:23,392 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 94.0) internal successors, (4888), 52 states have internal predecessors, (4888), 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) [2022-07-21 09:19:23,392 INFO L186 Difference]: Start difference. First operand has 537 places, 593 transitions, 7840 flow. Second operand 51 states and 2663 transitions. [2022-07-21 09:19:23,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 642 transitions, 9736 flow [2022-07-21 09:19:23,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 642 transitions, 9474 flow, removed 20 selfloop flow, removed 36 redundant places. [2022-07-21 09:19:23,570 INFO L242 Difference]: Finished difference. Result has 556 places, 597 transitions, 8062 flow [2022-07-21 09:19:23,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8062, PETRI_PLACES=556, PETRI_TRANSITIONS=597} [2022-07-21 09:19:23,570 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 468 predicate places. [2022-07-21 09:19:23,571 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 597 transitions, 8062 flow [2022-07-21 09:19:23,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:19:23,571 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:23,571 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] [2022-07-21 09:19:23,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-21 09:19:23,571 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1933814784, now seen corresponding path program 68 times [2022-07-21 09:19:23,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236665033] [2022-07-21 09:19:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:23,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236665033] [2022-07-21 09:19:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236665033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:23,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:23,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:19:23,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509045309] [2022-07-21 09:19:23,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:23,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:19:23,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:19:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:19:23,868 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:23,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 597 transitions, 8062 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:23,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:23,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:23,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:25,589 INFO L129 PetriNetUnfolder]: 446/1391 cut-off events. [2022-07-21 09:19:25,590 INFO L130 PetriNetUnfolder]: For 24851/24851 co-relation queries the response was YES. [2022-07-21 09:19:25,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10667 conditions, 1391 events. 446/1391 cut-off events. For 24851/24851 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9274 event pairs, 45 based on Foata normal form. 1/1390 useless extension candidates. Maximal degree in co-relation 10483. Up to 944 conditions per place. [2022-07-21 09:19:25,613 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 466 selfloop transitions, 110 changer transitions 30/645 dead transitions. [2022-07-21 09:19:25,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 645 transitions, 9873 flow [2022-07-21 09:19:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:19:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:19:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2012 transitions. [2022-07-21 09:19:25,614 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5632698768197089 [2022-07-21 09:19:25,615 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2012 transitions. [2022-07-21 09:19:25,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2012 transitions. [2022-07-21 09:19:25,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:25,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2012 transitions. [2022-07-21 09:19:25,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.94736842105263) internal successors, (2012), 38 states have internal predecessors, (2012), 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) [2022-07-21 09:19:25,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:19:25,618 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:19:25,618 INFO L186 Difference]: Start difference. First operand has 556 places, 597 transitions, 8062 flow. Second operand 38 states and 2012 transitions. [2022-07-21 09:19:25,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 645 transitions, 9873 flow [2022-07-21 09:19:25,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 645 transitions, 9411 flow, removed 74 selfloop flow, removed 46 redundant places. [2022-07-21 09:19:25,825 INFO L242 Difference]: Finished difference. Result has 548 places, 603 transitions, 8026 flow [2022-07-21 09:19:25,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7620, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8026, PETRI_PLACES=548, PETRI_TRANSITIONS=603} [2022-07-21 09:19:25,825 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 460 predicate places. [2022-07-21 09:19:25,826 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 603 transitions, 8026 flow [2022-07-21 09:19:25,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:25,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:25,826 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] [2022-07-21 09:19:25,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-21 09:19:25,826 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:25,827 INFO L85 PathProgramCache]: Analyzing trace with hash -843026700, now seen corresponding path program 69 times [2022-07-21 09:19:25,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:25,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756423986] [2022-07-21 09:19:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:25,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:26,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:26,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756423986] [2022-07-21 09:19:26,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756423986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:26,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:26,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647119423] [2022-07-21 09:19:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:26,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:26,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:26,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 603 transitions, 8026 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:26,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:26,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:26,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:27,492 INFO L129 PetriNetUnfolder]: 456/1426 cut-off events. [2022-07-21 09:19:27,492 INFO L130 PetriNetUnfolder]: For 25211/25211 co-relation queries the response was YES. [2022-07-21 09:19:27,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10850 conditions, 1426 events. 456/1426 cut-off events. For 25211/25211 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9654 event pairs, 42 based on Foata normal form. 1/1425 useless extension candidates. Maximal degree in co-relation 10666. Up to 926 conditions per place. [2022-07-21 09:19:27,516 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 445 selfloop transitions, 166 changer transitions 25/675 dead transitions. [2022-07-21 09:19:27,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 675 transitions, 10442 flow [2022-07-21 09:19:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:19:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:19:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2072 transitions. [2022-07-21 09:19:27,517 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5651936715766503 [2022-07-21 09:19:27,517 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2072 transitions. [2022-07-21 09:19:27,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2072 transitions. [2022-07-21 09:19:27,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:27,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2072 transitions. [2022-07-21 09:19:27,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 53.12820512820513) internal successors, (2072), 39 states have internal predecessors, (2072), 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) [2022-07-21 09:19:27,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:19:27,521 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:19:27,521 INFO L186 Difference]: Start difference. First operand has 548 places, 603 transitions, 8026 flow. Second operand 39 states and 2072 transitions. [2022-07-21 09:19:27,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 675 transitions, 10442 flow [2022-07-21 09:19:27,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 675 transitions, 10046 flow, removed 76 selfloop flow, removed 33 redundant places. [2022-07-21 09:19:27,758 INFO L242 Difference]: Finished difference. Result has 556 places, 631 transitions, 8664 flow [2022-07-21 09:19:27,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7666, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8664, PETRI_PLACES=556, PETRI_TRANSITIONS=631} [2022-07-21 09:19:27,759 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 468 predicate places. [2022-07-21 09:19:27,759 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 631 transitions, 8664 flow [2022-07-21 09:19:27,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:27,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:27,760 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] [2022-07-21 09:19:27,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-21 09:19:27,760 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2074310296, now seen corresponding path program 70 times [2022-07-21 09:19:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:27,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056760905] [2022-07-21 09:19:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:27,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:28,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056760905] [2022-07-21 09:19:28,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056760905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:28,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:28,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159040874] [2022-07-21 09:19:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:28,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:28,074 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:28,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 631 transitions, 8664 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:28,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:28,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:28,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:30,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:30,703 INFO L129 PetriNetUnfolder]: 447/1394 cut-off events. [2022-07-21 09:19:30,703 INFO L130 PetriNetUnfolder]: For 25053/25053 co-relation queries the response was YES. [2022-07-21 09:19:30,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10745 conditions, 1394 events. 447/1394 cut-off events. For 25053/25053 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9354 event pairs, 51 based on Foata normal form. 1/1393 useless extension candidates. Maximal degree in co-relation 10557. Up to 973 conditions per place. [2022-07-21 09:19:30,731 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 484 selfloop transitions, 116 changer transitions 22/661 dead transitions. [2022-07-21 09:19:30,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 661 transitions, 10139 flow [2022-07-21 09:19:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:19:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:19:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1905 transitions. [2022-07-21 09:19:30,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5629432624113475 [2022-07-21 09:19:30,733 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1905 transitions. [2022-07-21 09:19:30,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1905 transitions. [2022-07-21 09:19:30,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:30,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1905 transitions. [2022-07-21 09:19:30,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.916666666666664) internal successors, (1905), 36 states have internal predecessors, (1905), 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) [2022-07-21 09:19:30,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:19:30,736 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:19:30,736 INFO L186 Difference]: Start difference. First operand has 556 places, 631 transitions, 8664 flow. Second operand 36 states and 1905 transitions. [2022-07-21 09:19:30,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 661 transitions, 10139 flow [2022-07-21 09:19:30,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 661 transitions, 9779 flow, removed 102 selfloop flow, removed 27 redundant places. [2022-07-21 09:19:30,947 INFO L242 Difference]: Finished difference. Result has 565 places, 625 transitions, 8468 flow [2022-07-21 09:19:30,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8468, PETRI_PLACES=565, PETRI_TRANSITIONS=625} [2022-07-21 09:19:30,948 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 477 predicate places. [2022-07-21 09:19:30,948 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 625 transitions, 8468 flow [2022-07-21 09:19:30,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:30,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:30,948 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] [2022-07-21 09:19:30,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-07-21 09:19:30,948 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1519703834, now seen corresponding path program 71 times [2022-07-21 09:19:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:30,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967714400] [2022-07-21 09:19:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:30,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:31,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:31,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967714400] [2022-07-21 09:19:31,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967714400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:31,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:31,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:19:31,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419196690] [2022-07-21 09:19:31,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:31,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:19:31,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:31,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:19:31,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:19:31,247 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:31,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 625 transitions, 8468 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:31,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:31,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:31,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:34,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:34,719 INFO L129 PetriNetUnfolder]: 443/1392 cut-off events. [2022-07-21 09:19:34,719 INFO L130 PetriNetUnfolder]: For 24770/24770 co-relation queries the response was YES. [2022-07-21 09:19:34,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10651 conditions, 1392 events. 443/1392 cut-off events. For 24770/24770 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9316 event pairs, 43 based on Foata normal form. 1/1391 useless extension candidates. Maximal degree in co-relation 10460. Up to 989 conditions per place. [2022-07-21 09:19:34,744 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 499 selfloop transitions, 93 changer transitions 19/650 dead transitions. [2022-07-21 09:19:34,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 650 transitions, 9877 flow [2022-07-21 09:19:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:19:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:19:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1839 transitions. [2022-07-21 09:19:34,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.558966565349544 [2022-07-21 09:19:34,746 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1839 transitions. [2022-07-21 09:19:34,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1839 transitions. [2022-07-21 09:19:34,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:34,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1839 transitions. [2022-07-21 09:19:34,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.542857142857144) internal successors, (1839), 35 states have internal predecessors, (1839), 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) [2022-07-21 09:19:34,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:19:34,749 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:19:34,749 INFO L186 Difference]: Start difference. First operand has 565 places, 625 transitions, 8468 flow. Second operand 35 states and 1839 transitions. [2022-07-21 09:19:34,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 650 transitions, 9877 flow [2022-07-21 09:19:34,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 650 transitions, 9566 flow, removed 15 selfloop flow, removed 37 redundant places. [2022-07-21 09:19:34,988 INFO L242 Difference]: Finished difference. Result has 561 places, 622 transitions, 8342 flow [2022-07-21 09:19:34,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8169, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8342, PETRI_PLACES=561, PETRI_TRANSITIONS=622} [2022-07-21 09:19:34,989 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 473 predicate places. [2022-07-21 09:19:34,989 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 622 transitions, 8342 flow [2022-07-21 09:19:34,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:34,989 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:34,989 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] [2022-07-21 09:19:34,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-21 09:19:34,989 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1808907290, now seen corresponding path program 72 times [2022-07-21 09:19:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:34,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217739776] [2022-07-21 09:19:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:35,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:35,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217739776] [2022-07-21 09:19:35,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217739776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:35,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:35,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:19:35,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819484123] [2022-07-21 09:19:35,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:35,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:19:35,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:19:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:19:35,306 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:35,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 622 transitions, 8342 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:19:35,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:35,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:35,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:38,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:19:38,923 INFO L129 PetriNetUnfolder]: 440/1377 cut-off events. [2022-07-21 09:19:38,923 INFO L130 PetriNetUnfolder]: For 24500/24500 co-relation queries the response was YES. [2022-07-21 09:19:38,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10509 conditions, 1377 events. 440/1377 cut-off events. For 24500/24500 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9159 event pairs, 44 based on Foata normal form. 1/1375 useless extension candidates. Maximal degree in co-relation 10320. Up to 975 conditions per place. [2022-07-21 09:19:38,947 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 490 selfloop transitions, 100 changer transitions 18/647 dead transitions. [2022-07-21 09:19:38,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 647 transitions, 9774 flow [2022-07-21 09:19:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:19:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:19:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1939 transitions. [2022-07-21 09:19:38,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5575043128234618 [2022-07-21 09:19:38,949 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1939 transitions. [2022-07-21 09:19:38,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1939 transitions. [2022-07-21 09:19:38,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:38,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1939 transitions. [2022-07-21 09:19:38,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.4054054054054) internal successors, (1939), 37 states have internal predecessors, (1939), 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) [2022-07-21 09:19:38,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:19:38,952 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:19:38,952 INFO L186 Difference]: Start difference. First operand has 561 places, 622 transitions, 8342 flow. Second operand 37 states and 1939 transitions. [2022-07-21 09:19:38,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 647 transitions, 9774 flow [2022-07-21 09:19:39,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 647 transitions, 9487 flow, removed 16 selfloop flow, removed 37 redundant places. [2022-07-21 09:19:39,183 INFO L242 Difference]: Finished difference. Result has 560 places, 619 transitions, 8264 flow [2022-07-21 09:19:39,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8067, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8264, PETRI_PLACES=560, PETRI_TRANSITIONS=619} [2022-07-21 09:19:39,184 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 472 predicate places. [2022-07-21 09:19:39,184 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 619 transitions, 8264 flow [2022-07-21 09:19:39,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:19:39,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:39,184 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] [2022-07-21 09:19:39,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-21 09:19:39,184 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash 986848300, now seen corresponding path program 73 times [2022-07-21 09:19:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:39,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762801543] [2022-07-21 09:19:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:39,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762801543] [2022-07-21 09:19:39,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762801543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:39,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:39,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:39,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568515260] [2022-07-21 09:19:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:39,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:39,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:39,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 619 transitions, 8264 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:39,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:39,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:39,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:41,181 INFO L129 PetriNetUnfolder]: 441/1376 cut-off events. [2022-07-21 09:19:41,181 INFO L130 PetriNetUnfolder]: For 24764/24764 co-relation queries the response was YES. [2022-07-21 09:19:41,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10579 conditions, 1376 events. 441/1376 cut-off events. For 24764/24764 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9202 event pairs, 41 based on Foata normal form. 1/1374 useless extension candidates. Maximal degree in co-relation 10391. Up to 934 conditions per place. [2022-07-21 09:19:41,199 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 468 selfloop transitions, 118 changer transitions 27/652 dead transitions. [2022-07-21 09:19:41,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 652 transitions, 9926 flow [2022-07-21 09:19:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:19:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:19:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1810 transitions. [2022-07-21 09:19:41,201 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5663329161451814 [2022-07-21 09:19:41,201 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1810 transitions. [2022-07-21 09:19:41,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1810 transitions. [2022-07-21 09:19:41,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:41,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1810 transitions. [2022-07-21 09:19:41,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.23529411764706) internal successors, (1810), 34 states have internal predecessors, (1810), 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) [2022-07-21 09:19:41,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:41,204 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:41,204 INFO L186 Difference]: Start difference. First operand has 560 places, 619 transitions, 8264 flow. Second operand 34 states and 1810 transitions. [2022-07-21 09:19:41,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 652 transitions, 9926 flow [2022-07-21 09:19:41,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 652 transitions, 9673 flow, removed 26 selfloop flow, removed 36 redundant places. [2022-07-21 09:19:41,403 INFO L242 Difference]: Finished difference. Result has 560 places, 616 transitions, 8330 flow [2022-07-21 09:19:41,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8037, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8330, PETRI_PLACES=560, PETRI_TRANSITIONS=616} [2022-07-21 09:19:41,404 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 472 predicate places. [2022-07-21 09:19:41,404 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 616 transitions, 8330 flow [2022-07-21 09:19:41,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:41,404 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:41,404 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] [2022-07-21 09:19:41,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-21 09:19:41,404 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:41,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1500870456, now seen corresponding path program 74 times [2022-07-21 09:19:41,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:41,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320783632] [2022-07-21 09:19:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:41,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:41,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320783632] [2022-07-21 09:19:41,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320783632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:41,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:41,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468657092] [2022-07-21 09:19:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:41,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:41,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:41,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 616 transitions, 8330 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:41,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:41,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:41,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:43,516 INFO L129 PetriNetUnfolder]: 434/1364 cut-off events. [2022-07-21 09:19:43,516 INFO L130 PetriNetUnfolder]: For 24456/24456 co-relation queries the response was YES. [2022-07-21 09:19:43,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10524 conditions, 1364 events. 434/1364 cut-off events. For 24456/24456 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9108 event pairs, 47 based on Foata normal form. 1/1362 useless extension candidates. Maximal degree in co-relation 10334. Up to 904 conditions per place. [2022-07-21 09:19:43,538 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 443 selfloop transitions, 137 changer transitions 31/650 dead transitions. [2022-07-21 09:19:43,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 650 transitions, 9882 flow [2022-07-21 09:19:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:19:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:19:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1913 transitions. [2022-07-21 09:19:43,540 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5653073286052009 [2022-07-21 09:19:43,540 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1913 transitions. [2022-07-21 09:19:43,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1913 transitions. [2022-07-21 09:19:43,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:43,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1913 transitions. [2022-07-21 09:19:43,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.138888888888886) internal successors, (1913), 36 states have internal predecessors, (1913), 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) [2022-07-21 09:19:43,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:19:43,544 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:19:43,544 INFO L186 Difference]: Start difference. First operand has 560 places, 616 transitions, 8330 flow. Second operand 36 states and 1913 transitions. [2022-07-21 09:19:43,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 650 transitions, 9882 flow [2022-07-21 09:19:43,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 650 transitions, 9548 flow, removed 29 selfloop flow, removed 32 redundant places. [2022-07-21 09:19:43,770 INFO L242 Difference]: Finished difference. Result has 561 places, 604 transitions, 8184 flow [2022-07-21 09:19:43,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8184, PETRI_PLACES=561, PETRI_TRANSITIONS=604} [2022-07-21 09:19:43,770 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 473 predicate places. [2022-07-21 09:19:43,770 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 604 transitions, 8184 flow [2022-07-21 09:19:43,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:43,771 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:43,771 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] [2022-07-21 09:19:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-07-21 09:19:43,771 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1910973404, now seen corresponding path program 75 times [2022-07-21 09:19:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:43,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324093649] [2022-07-21 09:19:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:43,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:44,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:44,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324093649] [2022-07-21 09:19:44,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324093649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:44,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:44,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:19:44,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549498378] [2022-07-21 09:19:44,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:44,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:19:44,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:44,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:19:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:19:44,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:44,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 604 transitions, 8184 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:44,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:44,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:44,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:46,327 INFO L129 PetriNetUnfolder]: 447/1423 cut-off events. [2022-07-21 09:19:46,327 INFO L130 PetriNetUnfolder]: For 26189/26189 co-relation queries the response was YES. [2022-07-21 09:19:46,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10938 conditions, 1423 events. 447/1423 cut-off events. For 26189/26189 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9636 event pairs, 39 based on Foata normal form. 1/1422 useless extension candidates. Maximal degree in co-relation 10750. Up to 836 conditions per place. [2022-07-21 09:19:46,351 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 392 selfloop transitions, 224 changer transitions 22/677 dead transitions. [2022-07-21 09:19:46,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 677 transitions, 10731 flow [2022-07-21 09:19:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 09:19:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-21 09:19:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2778 transitions. [2022-07-21 09:19:46,353 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5576073865917303 [2022-07-21 09:19:46,353 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2778 transitions. [2022-07-21 09:19:46,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2778 transitions. [2022-07-21 09:19:46,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:46,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2778 transitions. [2022-07-21 09:19:46,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 52.41509433962264) internal successors, (2778), 53 states have internal predecessors, (2778), 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) [2022-07-21 09:19:46,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 94.0) internal successors, (5076), 54 states have internal predecessors, (5076), 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) [2022-07-21 09:19:46,357 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 94.0) internal successors, (5076), 54 states have internal predecessors, (5076), 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) [2022-07-21 09:19:46,357 INFO L186 Difference]: Start difference. First operand has 561 places, 604 transitions, 8184 flow. Second operand 53 states and 2778 transitions. [2022-07-21 09:19:46,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 677 transitions, 10731 flow [2022-07-21 09:19:46,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 677 transitions, 10295 flow, removed 36 selfloop flow, removed 38 redundant places. [2022-07-21 09:19:46,570 INFO L242 Difference]: Finished difference. Result has 576 places, 634 transitions, 8978 flow [2022-07-21 09:19:46,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7798, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=8978, PETRI_PLACES=576, PETRI_TRANSITIONS=634} [2022-07-21 09:19:46,571 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 488 predicate places. [2022-07-21 09:19:46,571 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 634 transitions, 8978 flow [2022-07-21 09:19:46,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:46,571 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:46,572 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] [2022-07-21 09:19:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-21 09:19:46,572 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash 67554114, now seen corresponding path program 76 times [2022-07-21 09:19:46,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:46,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808166714] [2022-07-21 09:19:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:46,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:46,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808166714] [2022-07-21 09:19:46,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808166714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:46,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:46,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:19:46,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791412601] [2022-07-21 09:19:46,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:19:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:19:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:19:46,985 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:46,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 634 transitions, 8978 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:19:46,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:46,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:46,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:48,822 INFO L129 PetriNetUnfolder]: 437/1389 cut-off events. [2022-07-21 09:19:48,822 INFO L130 PetriNetUnfolder]: For 25613/25613 co-relation queries the response was YES. [2022-07-21 09:19:48,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10881 conditions, 1389 events. 437/1389 cut-off events. For 25613/25613 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9329 event pairs, 53 based on Foata normal form. 1/1387 useless extension candidates. Maximal degree in co-relation 10691. Up to 988 conditions per place. [2022-07-21 09:19:48,848 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 504 selfloop transitions, 72 changer transitions 38/653 dead transitions. [2022-07-21 09:19:48,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 653 transitions, 10288 flow [2022-07-21 09:19:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:19:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:19:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1834 transitions. [2022-07-21 09:19:48,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5574468085106383 [2022-07-21 09:19:48,850 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1834 transitions. [2022-07-21 09:19:48,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1834 transitions. [2022-07-21 09:19:48,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:48,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1834 transitions. [2022-07-21 09:19:48,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.4) internal successors, (1834), 35 states have internal predecessors, (1834), 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) [2022-07-21 09:19:48,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:19:48,853 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:19:48,853 INFO L186 Difference]: Start difference. First operand has 576 places, 634 transitions, 8978 flow. Second operand 35 states and 1834 transitions. [2022-07-21 09:19:48,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 653 transitions, 10288 flow [2022-07-21 09:19:49,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 653 transitions, 9817 flow, removed 119 selfloop flow, removed 40 redundant places. [2022-07-21 09:19:49,101 INFO L242 Difference]: Finished difference. Result has 568 places, 606 transitions, 8281 flow [2022-07-21 09:19:49,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8513, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8281, PETRI_PLACES=568, PETRI_TRANSITIONS=606} [2022-07-21 09:19:49,102 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 480 predicate places. [2022-07-21 09:19:49,102 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 606 transitions, 8281 flow [2022-07-21 09:19:49,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 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) [2022-07-21 09:19:49,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:49,102 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] [2022-07-21 09:19:49,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-07-21 09:19:49,102 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash 249884598, now seen corresponding path program 77 times [2022-07-21 09:19:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:49,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977117433] [2022-07-21 09:19:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:49,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:49,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977117433] [2022-07-21 09:19:49,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977117433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:49,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:49,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:49,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847858756] [2022-07-21 09:19:49,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:49,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:49,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:49,440 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:49,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 606 transitions, 8281 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:49,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:49,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:49,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:51,280 INFO L129 PetriNetUnfolder]: 442/1390 cut-off events. [2022-07-21 09:19:51,281 INFO L130 PetriNetUnfolder]: For 24963/24963 co-relation queries the response was YES. [2022-07-21 09:19:51,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10701 conditions, 1390 events. 442/1390 cut-off events. For 24963/24963 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9317 event pairs, 44 based on Foata normal form. 1/1388 useless extension candidates. Maximal degree in co-relation 10513. Up to 972 conditions per place. [2022-07-21 09:19:51,303 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 495 selfloop transitions, 90 changer transitions 22/646 dead transitions. [2022-07-21 09:19:51,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 646 transitions, 10041 flow [2022-07-21 09:19:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:19:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:19:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1801 transitions. [2022-07-21 09:19:51,305 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5635168961201502 [2022-07-21 09:19:51,305 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1801 transitions. [2022-07-21 09:19:51,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1801 transitions. [2022-07-21 09:19:51,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:51,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1801 transitions. [2022-07-21 09:19:51,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.970588235294116) internal successors, (1801), 34 states have internal predecessors, (1801), 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) [2022-07-21 09:19:51,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:51,309 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:51,309 INFO L186 Difference]: Start difference. First operand has 568 places, 606 transitions, 8281 flow. Second operand 34 states and 1801 transitions. [2022-07-21 09:19:51,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 646 transitions, 10041 flow [2022-07-21 09:19:51,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 646 transitions, 9634 flow, removed 50 selfloop flow, removed 43 redundant places. [2022-07-21 09:19:51,508 INFO L242 Difference]: Finished difference. Result has 538 places, 613 transitions, 8284 flow [2022-07-21 09:19:51,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7910, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8284, PETRI_PLACES=538, PETRI_TRANSITIONS=613} [2022-07-21 09:19:51,509 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 450 predicate places. [2022-07-21 09:19:51,509 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 613 transitions, 8284 flow [2022-07-21 09:19:51,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:51,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:51,509 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] [2022-07-21 09:19:51,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-07-21 09:19:51,509 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1400810684, now seen corresponding path program 78 times [2022-07-21 09:19:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:51,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536041555] [2022-07-21 09:19:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:51,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:51,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536041555] [2022-07-21 09:19:51,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536041555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:51,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:51,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626037818] [2022-07-21 09:19:51,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:51,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:51,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:51,861 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:51,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 613 transitions, 8284 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:51,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:51,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:51,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:53,372 INFO L129 PetriNetUnfolder]: 440/1379 cut-off events. [2022-07-21 09:19:53,372 INFO L130 PetriNetUnfolder]: For 24972/24972 co-relation queries the response was YES. [2022-07-21 09:19:53,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 1379 events. 440/1379 cut-off events. For 24972/24972 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9221 event pairs, 51 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 10408. Up to 953 conditions per place. [2022-07-21 09:19:53,392 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 477 selfloop transitions, 110 changer transitions 19/645 dead transitions. [2022-07-21 09:19:53,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 645 transitions, 9962 flow [2022-07-21 09:19:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:19:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 09:19:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1756 transitions. [2022-07-21 09:19:53,393 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.56608639587363 [2022-07-21 09:19:53,393 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1756 transitions. [2022-07-21 09:19:53,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1756 transitions. [2022-07-21 09:19:53,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:53,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1756 transitions. [2022-07-21 09:19:53,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.21212121212121) internal successors, (1756), 33 states have internal predecessors, (1756), 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) [2022-07-21 09:19:53,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:19:53,396 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:19:53,396 INFO L186 Difference]: Start difference. First operand has 538 places, 613 transitions, 8284 flow. Second operand 33 states and 1756 transitions. [2022-07-21 09:19:53,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 645 transitions, 9962 flow [2022-07-21 09:19:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 645 transitions, 9737 flow, removed 45 selfloop flow, removed 28 redundant places. [2022-07-21 09:19:53,587 INFO L242 Difference]: Finished difference. Result has 543 places, 615 transitions, 8418 flow [2022-07-21 09:19:53,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8077, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8418, PETRI_PLACES=543, PETRI_TRANSITIONS=615} [2022-07-21 09:19:53,587 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 455 predicate places. [2022-07-21 09:19:53,587 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 615 transitions, 8418 flow [2022-07-21 09:19:53,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:53,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:53,588 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] [2022-07-21 09:19:53,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-07-21 09:19:53,588 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1687529778, now seen corresponding path program 79 times [2022-07-21 09:19:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552622809] [2022-07-21 09:19:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:53,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:53,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552622809] [2022-07-21 09:19:53,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552622809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:53,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:53,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:19:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374540248] [2022-07-21 09:19:53,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:53,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:19:53,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:19:53,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:19:53,941 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:53,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 615 transitions, 8418 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:53,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:53,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:53,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:56,055 INFO L129 PetriNetUnfolder]: 438/1360 cut-off events. [2022-07-21 09:19:56,055 INFO L130 PetriNetUnfolder]: For 25984/25984 co-relation queries the response was YES. [2022-07-21 09:19:56,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10601 conditions, 1360 events. 438/1360 cut-off events. For 25984/25984 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9075 event pairs, 39 based on Foata normal form. 1/1359 useless extension candidates. Maximal degree in co-relation 10416. Up to 845 conditions per place. [2022-07-21 09:19:56,079 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 398 selfloop transitions, 182 changer transitions 31/650 dead transitions. [2022-07-21 09:19:56,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 650 transitions, 10056 flow [2022-07-21 09:19:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 09:19:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-21 09:19:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2619 transitions. [2022-07-21 09:19:56,081 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5572340425531915 [2022-07-21 09:19:56,081 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2619 transitions. [2022-07-21 09:19:56,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2619 transitions. [2022-07-21 09:19:56,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:56,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2619 transitions. [2022-07-21 09:19:56,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 52.38) internal successors, (2619), 50 states have internal predecessors, (2619), 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) [2022-07-21 09:19:56,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 94.0) internal successors, (4794), 51 states have internal predecessors, (4794), 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) [2022-07-21 09:19:56,086 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 94.0) internal successors, (4794), 51 states have internal predecessors, (4794), 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) [2022-07-21 09:19:56,086 INFO L186 Difference]: Start difference. First operand has 543 places, 615 transitions, 8418 flow. Second operand 50 states and 2619 transitions. [2022-07-21 09:19:56,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 650 transitions, 10056 flow [2022-07-21 09:19:56,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 650 transitions, 9791 flow, removed 45 selfloop flow, removed 30 redundant places. [2022-07-21 09:19:56,313 INFO L242 Difference]: Finished difference. Result has 564 places, 603 transitions, 8448 flow [2022-07-21 09:19:56,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8167, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=8448, PETRI_PLACES=564, PETRI_TRANSITIONS=603} [2022-07-21 09:19:56,314 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 476 predicate places. [2022-07-21 09:19:56,314 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 603 transitions, 8448 flow [2022-07-21 09:19:56,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:19:56,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:56,314 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] [2022-07-21 09:19:56,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-07-21 09:19:56,315 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1617400434, now seen corresponding path program 80 times [2022-07-21 09:19:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:56,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015257860] [2022-07-21 09:19:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:56,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:56,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:56,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015257860] [2022-07-21 09:19:56,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015257860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:56,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:56,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:19:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079064976] [2022-07-21 09:19:56,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:56,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:19:56,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:19:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:19:56,686 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:56,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 603 transitions, 8448 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:56,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:56,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:56,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:58,207 INFO L129 PetriNetUnfolder]: 429/1352 cut-off events. [2022-07-21 09:19:58,207 INFO L130 PetriNetUnfolder]: For 24640/24640 co-relation queries the response was YES. [2022-07-21 09:19:58,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10566 conditions, 1352 events. 429/1352 cut-off events. For 24640/24640 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9020 event pairs, 44 based on Foata normal form. 1/1350 useless extension candidates. Maximal degree in co-relation 10381. Up to 960 conditions per place. [2022-07-21 09:19:58,228 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 483 selfloop transitions, 83 changer transitions 26/631 dead transitions. [2022-07-21 09:19:58,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 631 transitions, 9840 flow [2022-07-21 09:19:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:19:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:19:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1797 transitions. [2022-07-21 09:19:58,233 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5622653316645807 [2022-07-21 09:19:58,233 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1797 transitions. [2022-07-21 09:19:58,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1797 transitions. [2022-07-21 09:19:58,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:58,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1797 transitions. [2022-07-21 09:19:58,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.85294117647059) internal successors, (1797), 34 states have internal predecessors, (1797), 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) [2022-07-21 09:19:58,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:58,236 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:19:58,236 INFO L186 Difference]: Start difference. First operand has 564 places, 603 transitions, 8448 flow. Second operand 34 states and 1797 transitions. [2022-07-21 09:19:58,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 631 transitions, 9840 flow [2022-07-21 09:19:58,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 631 transitions, 9356 flow, removed 21 selfloop flow, removed 50 redundant places. [2022-07-21 09:19:58,440 INFO L242 Difference]: Finished difference. Result has 543 places, 595 transitions, 8094 flow [2022-07-21 09:19:58,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8094, PETRI_PLACES=543, PETRI_TRANSITIONS=595} [2022-07-21 09:19:58,440 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 455 predicate places. [2022-07-21 09:19:58,440 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 595 transitions, 8094 flow [2022-07-21 09:19:58,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:19:58,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:58,441 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] [2022-07-21 09:19:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-07-21 09:19:58,441 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 225077884, now seen corresponding path program 81 times [2022-07-21 09:19:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:58,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344433021] [2022-07-21 09:19:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:58,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344433021] [2022-07-21 09:19:58,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344433021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:19:58,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:19:58,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:19:58,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26192252] [2022-07-21 09:19:58,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:19:58,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:19:58,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:19:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:19:58,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:19:58,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 595 transitions, 8094 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:19:58,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:58,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:19:58,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:01,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:20:03,212 INFO L129 PetriNetUnfolder]: 430/1362 cut-off events. [2022-07-21 09:20:03,212 INFO L130 PetriNetUnfolder]: For 25404/25404 co-relation queries the response was YES. [2022-07-21 09:20:03,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10554 conditions, 1362 events. 430/1362 cut-off events. For 25404/25404 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9070 event pairs, 48 based on Foata normal form. 1/1362 useless extension candidates. Maximal degree in co-relation 10372. Up to 901 conditions per place. [2022-07-21 09:20:03,232 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 443 selfloop transitions, 138 changer transitions 24/644 dead transitions. [2022-07-21 09:20:03,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 644 transitions, 10101 flow [2022-07-21 09:20:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 09:20:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-21 09:20:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2214 transitions. [2022-07-21 09:20:03,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.560790273556231 [2022-07-21 09:20:03,234 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2214 transitions. [2022-07-21 09:20:03,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2214 transitions. [2022-07-21 09:20:03,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:03,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2214 transitions. [2022-07-21 09:20:03,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.714285714285715) internal successors, (2214), 42 states have internal predecessors, (2214), 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) [2022-07-21 09:20:03,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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) [2022-07-21 09:20:03,238 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 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) [2022-07-21 09:20:03,238 INFO L186 Difference]: Start difference. First operand has 543 places, 595 transitions, 8094 flow. Second operand 42 states and 2214 transitions. [2022-07-21 09:20:03,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 644 transitions, 10101 flow [2022-07-21 09:20:03,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 644 transitions, 9888 flow, removed 19 selfloop flow, removed 32 redundant places. [2022-07-21 09:20:03,440 INFO L242 Difference]: Finished difference. Result has 552 places, 603 transitions, 8468 flow [2022-07-21 09:20:03,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7905, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=8468, PETRI_PLACES=552, PETRI_TRANSITIONS=603} [2022-07-21 09:20:03,441 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 464 predicate places. [2022-07-21 09:20:03,441 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 603 transitions, 8468 flow [2022-07-21 09:20:03,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:03,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:03,441 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] [2022-07-21 09:20:03,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-07-21 09:20:03,441 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:03,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1984138474, now seen corresponding path program 82 times [2022-07-21 09:20:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:03,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900359973] [2022-07-21 09:20:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:03,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900359973] [2022-07-21 09:20:03,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900359973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:03,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:03,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:03,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803943186] [2022-07-21 09:20:03,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:03,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:03,823 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:03,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 603 transitions, 8468 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:03,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:03,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:03,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:06,872 INFO L129 PetriNetUnfolder]: 433/1392 cut-off events. [2022-07-21 09:20:06,872 INFO L130 PetriNetUnfolder]: For 27623/27623 co-relation queries the response was YES. [2022-07-21 09:20:06,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10945 conditions, 1392 events. 433/1392 cut-off events. For 27623/27623 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9420 event pairs, 43 based on Foata normal form. 1/1391 useless extension candidates. Maximal degree in co-relation 10759. Up to 905 conditions per place. [2022-07-21 09:20:06,892 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 431 selfloop transitions, 154 changer transitions 29/653 dead transitions. [2022-07-21 09:20:06,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 653 transitions, 10468 flow [2022-07-21 09:20:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 09:20:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-21 09:20:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2418 transitions. [2022-07-21 09:20:06,894 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.559204440333025 [2022-07-21 09:20:06,894 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2418 transitions. [2022-07-21 09:20:06,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2418 transitions. [2022-07-21 09:20:06,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:06,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2418 transitions. [2022-07-21 09:20:06,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.56521739130435) internal successors, (2418), 46 states have internal predecessors, (2418), 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) [2022-07-21 09:20:06,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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) [2022-07-21 09:20:06,898 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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) [2022-07-21 09:20:06,898 INFO L186 Difference]: Start difference. First operand has 552 places, 603 transitions, 8468 flow. Second operand 46 states and 2418 transitions. [2022-07-21 09:20:06,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 653 transitions, 10468 flow [2022-07-21 09:20:07,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 653 transitions, 10130 flow, removed 84 selfloop flow, removed 35 redundant places. [2022-07-21 09:20:07,151 INFO L242 Difference]: Finished difference. Result has 566 places, 609 transitions, 8707 flow [2022-07-21 09:20:07,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8170, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=8707, PETRI_PLACES=566, PETRI_TRANSITIONS=609} [2022-07-21 09:20:07,152 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 478 predicate places. [2022-07-21 09:20:07,152 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 609 transitions, 8707 flow [2022-07-21 09:20:07,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:07,152 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:07,152 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] [2022-07-21 09:20:07,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-07-21 09:20:07,153 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash -38741178, now seen corresponding path program 83 times [2022-07-21 09:20:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51067388] [2022-07-21 09:20:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:07,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:07,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51067388] [2022-07-21 09:20:07,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51067388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:07,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:07,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270108390] [2022-07-21 09:20:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:07,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:07,522 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:07,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 609 transitions, 8707 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:07,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:07,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:07,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:09,585 INFO L129 PetriNetUnfolder]: 437/1406 cut-off events. [2022-07-21 09:20:09,586 INFO L130 PetriNetUnfolder]: For 29992/29992 co-relation queries the response was YES. [2022-07-21 09:20:09,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11318 conditions, 1406 events. 437/1406 cut-off events. For 29992/29992 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9560 event pairs, 40 based on Foata normal form. 1/1405 useless extension candidates. Maximal degree in co-relation 11127. Up to 806 conditions per place. [2022-07-21 09:20:09,609 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 357 selfloop transitions, 248 changer transitions 21/665 dead transitions. [2022-07-21 09:20:09,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 665 transitions, 11065 flow [2022-07-21 09:20:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 09:20:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-21 09:20:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2425 transitions. [2022-07-21 09:20:09,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5608233117483812 [2022-07-21 09:20:09,611 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2425 transitions. [2022-07-21 09:20:09,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2425 transitions. [2022-07-21 09:20:09,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:09,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2425 transitions. [2022-07-21 09:20:09,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.71739130434783) internal successors, (2425), 46 states have internal predecessors, (2425), 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) [2022-07-21 09:20:09,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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) [2022-07-21 09:20:09,615 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 94.0) internal successors, (4418), 47 states have internal predecessors, (4418), 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) [2022-07-21 09:20:09,615 INFO L186 Difference]: Start difference. First operand has 566 places, 609 transitions, 8707 flow. Second operand 46 states and 2425 transitions. [2022-07-21 09:20:09,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 665 transitions, 11065 flow [2022-07-21 09:20:09,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 665 transitions, 10680 flow, removed 74 selfloop flow, removed 37 redundant places. [2022-07-21 09:20:09,866 INFO L242 Difference]: Finished difference. Result has 575 places, 623 transitions, 9401 flow [2022-07-21 09:20:09,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=9401, PETRI_PLACES=575, PETRI_TRANSITIONS=623} [2022-07-21 09:20:09,866 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 487 predicate places. [2022-07-21 09:20:09,866 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 623 transitions, 9401 flow [2022-07-21 09:20:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:09,867 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:09,867 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] [2022-07-21 09:20:09,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-07-21 09:20:09,867 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1718480628, now seen corresponding path program 84 times [2022-07-21 09:20:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:09,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144582936] [2022-07-21 09:20:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:10,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:10,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144582936] [2022-07-21 09:20:10,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144582936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:10,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:10,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854186193] [2022-07-21 09:20:10,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:10,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:10,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:10,229 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:10,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 623 transitions, 9401 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:10,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:10,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:10,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:12,182 INFO L129 PetriNetUnfolder]: 431/1402 cut-off events. [2022-07-21 09:20:12,182 INFO L130 PetriNetUnfolder]: For 30832/30832 co-relation queries the response was YES. [2022-07-21 09:20:12,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11471 conditions, 1402 events. 431/1402 cut-off events. For 30832/30832 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9597 event pairs, 50 based on Foata normal form. 1/1401 useless extension candidates. Maximal degree in co-relation 11276. Up to 995 conditions per place. [2022-07-21 09:20:12,206 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 507 selfloop transitions, 83 changer transitions 19/648 dead transitions. [2022-07-21 09:20:12,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 648 transitions, 10820 flow [2022-07-21 09:20:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:20:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:20:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1791 transitions. [2022-07-21 09:20:12,207 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5603879849812266 [2022-07-21 09:20:12,207 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1791 transitions. [2022-07-21 09:20:12,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1791 transitions. [2022-07-21 09:20:12,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:12,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1791 transitions. [2022-07-21 09:20:12,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.6764705882353) internal successors, (1791), 34 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) [2022-07-21 09:20:12,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:12,219 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:12,219 INFO L186 Difference]: Start difference. First operand has 575 places, 623 transitions, 9401 flow. Second operand 34 states and 1791 transitions. [2022-07-21 09:20:12,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 648 transitions, 10820 flow [2022-07-21 09:20:12,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 648 transitions, 10380 flow, removed 112 selfloop flow, removed 34 redundant places. [2022-07-21 09:20:12,497 INFO L242 Difference]: Finished difference. Result has 575 places, 620 transitions, 9123 flow [2022-07-21 09:20:12,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8971, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9123, PETRI_PLACES=575, PETRI_TRANSITIONS=620} [2022-07-21 09:20:12,498 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 487 predicate places. [2022-07-21 09:20:12,498 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 620 transitions, 9123 flow [2022-07-21 09:20:12,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:12,498 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:12,498 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] [2022-07-21 09:20:12,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-07-21 09:20:12,499 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1357562870, now seen corresponding path program 85 times [2022-07-21 09:20:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013300800] [2022-07-21 09:20:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:12,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:12,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013300800] [2022-07-21 09:20:12,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013300800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:12,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:12,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:12,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853634598] [2022-07-21 09:20:12,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:12,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:12,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:12,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 620 transitions, 9123 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:12,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:12,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:12,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:14,610 INFO L129 PetriNetUnfolder]: 433/1403 cut-off events. [2022-07-21 09:20:14,611 INFO L130 PetriNetUnfolder]: For 31495/31495 co-relation queries the response was YES. [2022-07-21 09:20:14,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11507 conditions, 1403 events. 433/1403 cut-off events. For 31495/31495 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9589 event pairs, 44 based on Foata normal form. 1/1401 useless extension candidates. Maximal degree in co-relation 11309. Up to 971 conditions per place. [2022-07-21 09:20:14,635 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 491 selfloop transitions, 99 changer transitions 22/651 dead transitions. [2022-07-21 09:20:14,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 651 transitions, 10873 flow [2022-07-21 09:20:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:20:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:20:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1851 transitions. [2022-07-21 09:20:14,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5626139817629179 [2022-07-21 09:20:14,637 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1851 transitions. [2022-07-21 09:20:14,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1851 transitions. [2022-07-21 09:20:14,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:14,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1851 transitions. [2022-07-21 09:20:14,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.885714285714286) internal successors, (1851), 35 states have internal predecessors, (1851), 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) [2022-07-21 09:20:14,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:14,640 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:14,640 INFO L186 Difference]: Start difference. First operand has 575 places, 620 transitions, 9123 flow. Second operand 35 states and 1851 transitions. [2022-07-21 09:20:14,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 651 transitions, 10873 flow [2022-07-21 09:20:14,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 651 transitions, 10664 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-07-21 09:20:14,896 INFO L242 Difference]: Finished difference. Result has 575 places, 618 transitions, 9227 flow [2022-07-21 09:20:14,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8932, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9227, PETRI_PLACES=575, PETRI_TRANSITIONS=618} [2022-07-21 09:20:14,897 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 487 predicate places. [2022-07-21 09:20:14,897 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 618 transitions, 9227 flow [2022-07-21 09:20:14,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:14,897 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:14,897 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] [2022-07-21 09:20:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-07-21 09:20:14,898 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -524209904, now seen corresponding path program 86 times [2022-07-21 09:20:14,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:14,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118561416] [2022-07-21 09:20:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:15,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:15,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118561416] [2022-07-21 09:20:15,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118561416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:15,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:15,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:15,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670897067] [2022-07-21 09:20:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:15,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:15,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:15,212 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:15,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 618 transitions, 9227 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:15,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:15,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:15,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:17,161 INFO L129 PetriNetUnfolder]: 435/1414 cut-off events. [2022-07-21 09:20:17,161 INFO L130 PetriNetUnfolder]: For 32956/32956 co-relation queries the response was YES. [2022-07-21 09:20:17,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11697 conditions, 1414 events. 435/1414 cut-off events. For 32956/32956 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9712 event pairs, 49 based on Foata normal form. 1/1412 useless extension candidates. Maximal degree in co-relation 11499. Up to 964 conditions per place. [2022-07-21 09:20:17,184 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 483 selfloop transitions, 114 changer transitions 27/663 dead transitions. [2022-07-21 09:20:17,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 663 transitions, 11191 flow [2022-07-21 09:20:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:20:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:20:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2058 transitions. [2022-07-21 09:20:17,186 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5613747954173486 [2022-07-21 09:20:17,186 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2058 transitions. [2022-07-21 09:20:17,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2058 transitions. [2022-07-21 09:20:17,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:17,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2058 transitions. [2022-07-21 09:20:17,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.76923076923077) internal successors, (2058), 39 states have internal predecessors, (2058), 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) [2022-07-21 09:20:17,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:20:17,190 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:20:17,190 INFO L186 Difference]: Start difference. First operand has 575 places, 618 transitions, 9227 flow. Second operand 39 states and 2058 transitions. [2022-07-21 09:20:17,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 663 transitions, 11191 flow [2022-07-21 09:20:17,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 663 transitions, 10869 flow, removed 63 selfloop flow, removed 33 redundant places. [2022-07-21 09:20:17,483 INFO L242 Difference]: Finished difference. Result has 584 places, 622 transitions, 9355 flow [2022-07-21 09:20:17,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8945, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9355, PETRI_PLACES=584, PETRI_TRANSITIONS=622} [2022-07-21 09:20:17,483 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 496 predicate places. [2022-07-21 09:20:17,484 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 622 transitions, 9355 flow [2022-07-21 09:20:17,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:17,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:17,484 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] [2022-07-21 09:20:17,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-07-21 09:20:17,484 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1259664026, now seen corresponding path program 87 times [2022-07-21 09:20:17,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745063841] [2022-07-21 09:20:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:17,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745063841] [2022-07-21 09:20:17,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745063841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:17,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:17,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:20:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880135367] [2022-07-21 09:20:17,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:17,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:20:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:20:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:20:17,840 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:17,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 622 transitions, 9355 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:17,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:17,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:17,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:20,332 INFO L129 PetriNetUnfolder]: 429/1399 cut-off events. [2022-07-21 09:20:20,332 INFO L130 PetriNetUnfolder]: For 31543/31543 co-relation queries the response was YES. [2022-07-21 09:20:20,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11473 conditions, 1399 events. 429/1399 cut-off events. For 31543/31543 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9549 event pairs, 49 based on Foata normal form. 1/1397 useless extension candidates. Maximal degree in co-relation 11270. Up to 969 conditions per place. [2022-07-21 09:20:20,358 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 494 selfloop transitions, 97 changer transitions 21/651 dead transitions. [2022-07-21 09:20:20,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 651 transitions, 10913 flow [2022-07-21 09:20:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:20:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:20:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1995 transitions. [2022-07-21 09:20:20,359 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2022-07-21 09:20:20,359 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1995 transitions. [2022-07-21 09:20:20,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1995 transitions. [2022-07-21 09:20:20,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:20,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1995 transitions. [2022-07-21 09:20:20,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.5) internal successors, (1995), 38 states have internal predecessors, (1995), 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) [2022-07-21 09:20:20,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:20:20,363 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:20:20,363 INFO L186 Difference]: Start difference. First operand has 584 places, 622 transitions, 9355 flow. Second operand 38 states and 1995 transitions. [2022-07-21 09:20:20,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 651 transitions, 10913 flow [2022-07-21 09:20:20,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 651 transitions, 10627 flow, removed 65 selfloop flow, removed 32 redundant places. [2022-07-21 09:20:20,620 INFO L242 Difference]: Finished difference. Result has 588 places, 620 transitions, 9317 flow [2022-07-21 09:20:20,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=9087, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9317, PETRI_PLACES=588, PETRI_TRANSITIONS=620} [2022-07-21 09:20:20,621 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 500 predicate places. [2022-07-21 09:20:20,621 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 620 transitions, 9317 flow [2022-07-21 09:20:20,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:20,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:20,622 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] [2022-07-21 09:20:20,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-07-21 09:20:20,622 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:20,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2059068194, now seen corresponding path program 88 times [2022-07-21 09:20:20,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:20,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511930547] [2022-07-21 09:20:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:20,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:20,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511930547] [2022-07-21 09:20:20,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511930547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:20,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:20,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:20,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668978500] [2022-07-21 09:20:20,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:20,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:20,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:20,988 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:20,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 620 transitions, 9317 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:20,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:20,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:20,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:22,771 INFO L129 PetriNetUnfolder]: 424/1385 cut-off events. [2022-07-21 09:20:22,771 INFO L130 PetriNetUnfolder]: For 29977/29977 co-relation queries the response was YES. [2022-07-21 09:20:22,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11329 conditions, 1385 events. 424/1385 cut-off events. For 29977/29977 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9409 event pairs, 42 based on Foata normal form. 1/1383 useless extension candidates. Maximal degree in co-relation 11128. Up to 941 conditions per place. [2022-07-21 09:20:22,793 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 479 selfloop transitions, 102 changer transitions 25/645 dead transitions. [2022-07-21 09:20:22,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 645 transitions, 10773 flow [2022-07-21 09:20:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:20:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:20:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1902 transitions. [2022-07-21 09:20:22,795 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5620567375886525 [2022-07-21 09:20:22,795 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1902 transitions. [2022-07-21 09:20:22,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1902 transitions. [2022-07-21 09:20:22,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:22,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1902 transitions. [2022-07-21 09:20:22,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.833333333333336) internal successors, (1902), 36 states have internal predecessors, (1902), 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) [2022-07-21 09:20:22,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:20:22,798 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:20:22,799 INFO L186 Difference]: Start difference. First operand has 588 places, 620 transitions, 9317 flow. Second operand 36 states and 1902 transitions. [2022-07-21 09:20:22,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 645 transitions, 10773 flow [2022-07-21 09:20:23,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 645 transitions, 10376 flow, removed 71 selfloop flow, removed 36 redundant places. [2022-07-21 09:20:23,052 INFO L242 Difference]: Finished difference. Result has 587 places, 610 transitions, 9114 flow [2022-07-21 09:20:23,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8936, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9114, PETRI_PLACES=587, PETRI_TRANSITIONS=610} [2022-07-21 09:20:23,052 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 499 predicate places. [2022-07-21 09:20:23,052 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 610 transitions, 9114 flow [2022-07-21 09:20:23,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:23,052 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:23,053 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] [2022-07-21 09:20:23,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-07-21 09:20:23,053 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash 931494736, now seen corresponding path program 89 times [2022-07-21 09:20:23,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495032676] [2022-07-21 09:20:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:23,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:23,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:23,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495032676] [2022-07-21 09:20:23,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495032676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:23,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:23,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:23,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397724149] [2022-07-21 09:20:23,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:23,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:23,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:23,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:23,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 610 transitions, 9114 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:23,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:23,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:23,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:25,251 INFO L129 PetriNetUnfolder]: 422/1371 cut-off events. [2022-07-21 09:20:25,251 INFO L130 PetriNetUnfolder]: For 29419/29419 co-relation queries the response was YES. [2022-07-21 09:20:25,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11332 conditions, 1371 events. 422/1371 cut-off events. For 29419/29419 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9330 event pairs, 40 based on Foata normal form. 1/1369 useless extension candidates. Maximal degree in co-relation 11130. Up to 936 conditions per place. [2022-07-21 09:20:25,277 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 465 selfloop transitions, 118 changer transitions 22/644 dead transitions. [2022-07-21 09:20:25,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 644 transitions, 10885 flow [2022-07-21 09:20:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:20:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:20:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1954 transitions. [2022-07-21 09:20:25,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5618171362852213 [2022-07-21 09:20:25,279 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1954 transitions. [2022-07-21 09:20:25,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1954 transitions. [2022-07-21 09:20:25,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:25,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1954 transitions. [2022-07-21 09:20:25,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.810810810810814) internal successors, (1954), 37 states have internal predecessors, (1954), 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) [2022-07-21 09:20:25,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:20:25,283 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:20:25,283 INFO L186 Difference]: Start difference. First operand has 587 places, 610 transitions, 9114 flow. Second operand 37 states and 1954 transitions. [2022-07-21 09:20:25,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 644 transitions, 10885 flow [2022-07-21 09:20:25,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 644 transitions, 10594 flow, removed 27 selfloop flow, removed 37 redundant places. [2022-07-21 09:20:25,545 INFO L242 Difference]: Finished difference. Result has 582 places, 608 transitions, 9167 flow [2022-07-21 09:20:25,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8845, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9167, PETRI_PLACES=582, PETRI_TRANSITIONS=608} [2022-07-21 09:20:25,545 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 494 predicate places. [2022-07-21 09:20:25,545 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 608 transitions, 9167 flow [2022-07-21 09:20:25,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:25,545 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:25,546 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] [2022-07-21 09:20:25,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-07-21 09:20:25,546 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1292685348, now seen corresponding path program 90 times [2022-07-21 09:20:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:25,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776466667] [2022-07-21 09:20:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:25,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:25,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776466667] [2022-07-21 09:20:25,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776466667] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:25,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:25,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:20:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392894870] [2022-07-21 09:20:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:25,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:20:25,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:20:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:20:25,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:25,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 608 transitions, 9167 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:25,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:25,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:25,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:27,333 INFO L129 PetriNetUnfolder]: 415/1371 cut-off events. [2022-07-21 09:20:27,333 INFO L130 PetriNetUnfolder]: For 30505/30505 co-relation queries the response was YES. [2022-07-21 09:20:27,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11259 conditions, 1371 events. 415/1371 cut-off events. For 30505/30505 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9331 event pairs, 48 based on Foata normal form. 1/1371 useless extension candidates. Maximal degree in co-relation 11057. Up to 938 conditions per place. [2022-07-21 09:20:27,356 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 473 selfloop transitions, 106 changer transitions 16/634 dead transitions. [2022-07-21 09:20:27,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 634 transitions, 10704 flow [2022-07-21 09:20:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:20:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:20:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1853 transitions. [2022-07-21 09:20:27,358 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5632218844984802 [2022-07-21 09:20:27,358 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1853 transitions. [2022-07-21 09:20:27,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1853 transitions. [2022-07-21 09:20:27,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:27,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1853 transitions. [2022-07-21 09:20:27,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.94285714285714) internal successors, (1853), 35 states have internal predecessors, (1853), 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) [2022-07-21 09:20:27,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:27,361 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:27,361 INFO L186 Difference]: Start difference. First operand has 582 places, 608 transitions, 9167 flow. Second operand 35 states and 1853 transitions. [2022-07-21 09:20:27,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 634 transitions, 10704 flow [2022-07-21 09:20:27,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 634 transitions, 10376 flow, removed 53 selfloop flow, removed 34 redundant places. [2022-07-21 09:20:27,601 INFO L242 Difference]: Finished difference. Result has 580 places, 608 transitions, 9199 flow [2022-07-21 09:20:27,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8865, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9199, PETRI_PLACES=580, PETRI_TRANSITIONS=608} [2022-07-21 09:20:27,601 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 492 predicate places. [2022-07-21 09:20:27,601 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 608 transitions, 9199 flow [2022-07-21 09:20:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:27,602 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:27,602 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] [2022-07-21 09:20:27,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-07-21 09:20:27,602 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1806984384, now seen corresponding path program 91 times [2022-07-21 09:20:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:27,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719800518] [2022-07-21 09:20:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:27,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:27,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719800518] [2022-07-21 09:20:27,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719800518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:27,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:27,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:20:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183927747] [2022-07-21 09:20:27,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:20:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:20:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:20:27,952 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:27,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 608 transitions, 9199 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:27,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:27,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:27,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:29,673 INFO L129 PetriNetUnfolder]: 411/1344 cut-off events. [2022-07-21 09:20:29,673 INFO L130 PetriNetUnfolder]: For 28838/28838 co-relation queries the response was YES. [2022-07-21 09:20:29,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11069 conditions, 1344 events. 411/1344 cut-off events. For 28838/28838 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9049 event pairs, 48 based on Foata normal form. 1/1342 useless extension candidates. Maximal degree in co-relation 10868. Up to 966 conditions per place. [2022-07-21 09:20:29,696 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 488 selfloop transitions, 74 changer transitions 25/626 dead transitions. [2022-07-21 09:20:29,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 626 transitions, 10477 flow [2022-07-21 09:20:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:20:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:20:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1835 transitions. [2022-07-21 09:20:29,698 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5577507598784195 [2022-07-21 09:20:29,698 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1835 transitions. [2022-07-21 09:20:29,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1835 transitions. [2022-07-21 09:20:29,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:29,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1835 transitions. [2022-07-21 09:20:29,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.42857142857143) internal successors, (1835), 35 states have internal predecessors, (1835), 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) [2022-07-21 09:20:29,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:29,701 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:29,701 INFO L186 Difference]: Start difference. First operand has 580 places, 608 transitions, 9199 flow. Second operand 35 states and 1835 transitions. [2022-07-21 09:20:29,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 626 transitions, 10477 flow [2022-07-21 09:20:29,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 626 transitions, 10151 flow, removed 66 selfloop flow, removed 34 redundant places. [2022-07-21 09:20:29,962 INFO L242 Difference]: Finished difference. Result has 580 places, 592 transitions, 8807 flow [2022-07-21 09:20:29,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8877, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8807, PETRI_PLACES=580, PETRI_TRANSITIONS=592} [2022-07-21 09:20:29,962 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 492 predicate places. [2022-07-21 09:20:29,962 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 592 transitions, 8807 flow [2022-07-21 09:20:29,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:29,963 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:29,963 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] [2022-07-21 09:20:29,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-07-21 09:20:29,963 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:29,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:29,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1927529918, now seen corresponding path program 92 times [2022-07-21 09:20:29,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:29,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193123578] [2022-07-21 09:20:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:29,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:30,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193123578] [2022-07-21 09:20:30,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193123578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:30,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:30,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247089831] [2022-07-21 09:20:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:30,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:30,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:30,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:30,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 592 transitions, 8807 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:30,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:30,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:30,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:32,033 INFO L129 PetriNetUnfolder]: 409/1336 cut-off events. [2022-07-21 09:20:32,033 INFO L130 PetriNetUnfolder]: For 27985/27985 co-relation queries the response was YES. [2022-07-21 09:20:32,050 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10862 conditions, 1336 events. 409/1336 cut-off events. For 27985/27985 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8997 event pairs, 50 based on Foata normal form. 1/1333 useless extension candidates. Maximal degree in co-relation 10662. Up to 943 conditions per place. [2022-07-21 09:20:32,055 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 477 selfloop transitions, 78 changer transitions 22/616 dead transitions. [2022-07-21 09:20:32,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 616 transitions, 10104 flow [2022-07-21 09:20:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:20:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:20:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1788 transitions. [2022-07-21 09:20:32,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5594493116395495 [2022-07-21 09:20:32,056 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1788 transitions. [2022-07-21 09:20:32,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1788 transitions. [2022-07-21 09:20:32,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:32,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1788 transitions. [2022-07-21 09:20:32,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.588235294117645) internal successors, (1788), 34 states have internal predecessors, (1788), 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) [2022-07-21 09:20:32,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:32,060 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:32,060 INFO L186 Difference]: Start difference. First operand has 580 places, 592 transitions, 8807 flow. Second operand 34 states and 1788 transitions. [2022-07-21 09:20:32,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 616 transitions, 10104 flow [2022-07-21 09:20:32,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 616 transitions, 9836 flow, removed 33 selfloop flow, removed 32 redundant places. [2022-07-21 09:20:32,304 INFO L242 Difference]: Finished difference. Result has 565 places, 585 transitions, 8634 flow [2022-07-21 09:20:32,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8545, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8634, PETRI_PLACES=565, PETRI_TRANSITIONS=585} [2022-07-21 09:20:32,304 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 477 predicate places. [2022-07-21 09:20:32,305 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 585 transitions, 8634 flow [2022-07-21 09:20:32,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:32,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:32,305 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] [2022-07-21 09:20:32,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-07-21 09:20:32,305 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1084056234, now seen corresponding path program 93 times [2022-07-21 09:20:32,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:32,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827802157] [2022-07-21 09:20:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:32,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827802157] [2022-07-21 09:20:32,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827802157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:32,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:32,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:32,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242205057] [2022-07-21 09:20:32,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:32,648 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:32,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 585 transitions, 8634 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:32,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:32,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:32,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:34,190 INFO L129 PetriNetUnfolder]: 405/1313 cut-off events. [2022-07-21 09:20:34,190 INFO L130 PetriNetUnfolder]: For 27381/27381 co-relation queries the response was YES. [2022-07-21 09:20:34,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10699 conditions, 1313 events. 405/1313 cut-off events. For 27381/27381 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8780 event pairs, 48 based on Foata normal form. 1/1312 useless extension candidates. Maximal degree in co-relation 10499. Up to 919 conditions per place. [2022-07-21 09:20:34,212 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 461 selfloop transitions, 88 changer transitions 17/605 dead transitions. [2022-07-21 09:20:34,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 605 transitions, 9853 flow [2022-07-21 09:20:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:20:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:20:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1794 transitions. [2022-07-21 09:20:34,213 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5613266583229036 [2022-07-21 09:20:34,214 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1794 transitions. [2022-07-21 09:20:34,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1794 transitions. [2022-07-21 09:20:34,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:34,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1794 transitions. [2022-07-21 09:20:34,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.76470588235294) internal successors, (1794), 34 states have internal predecessors, (1794), 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) [2022-07-21 09:20:34,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:34,217 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:34,217 INFO L186 Difference]: Start difference. First operand has 565 places, 585 transitions, 8634 flow. Second operand 34 states and 1794 transitions. [2022-07-21 09:20:34,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 605 transitions, 9853 flow [2022-07-21 09:20:34,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 605 transitions, 9624 flow, removed 17 selfloop flow, removed 37 redundant places. [2022-07-21 09:20:34,447 INFO L242 Difference]: Finished difference. Result has 550 places, 578 transitions, 8531 flow [2022-07-21 09:20:34,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8409, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8531, PETRI_PLACES=550, PETRI_TRANSITIONS=578} [2022-07-21 09:20:34,448 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 462 predicate places. [2022-07-21 09:20:34,448 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 578 transitions, 8531 flow [2022-07-21 09:20:34,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:34,449 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:34,449 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] [2022-07-21 09:20:34,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-07-21 09:20:34,449 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash -770796904, now seen corresponding path program 94 times [2022-07-21 09:20:34,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:34,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101872082] [2022-07-21 09:20:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:34,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:34,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:34,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101872082] [2022-07-21 09:20:34,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101872082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:34,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:34,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:20:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062418854] [2022-07-21 09:20:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:34,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:20:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:20:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:20:34,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:34,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 578 transitions, 8531 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:34,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:34,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:34,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:36,443 INFO L129 PetriNetUnfolder]: 403/1305 cut-off events. [2022-07-21 09:20:36,443 INFO L130 PetriNetUnfolder]: For 27663/27663 co-relation queries the response was YES. [2022-07-21 09:20:36,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10620 conditions, 1305 events. 403/1305 cut-off events. For 27663/27663 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8652 event pairs, 35 based on Foata normal form. 1/1304 useless extension candidates. Maximal degree in co-relation 10428. Up to 912 conditions per place. [2022-07-21 09:20:36,464 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 446 selfloop transitions, 75 changer transitions 37/597 dead transitions. [2022-07-21 09:20:36,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 597 transitions, 9733 flow [2022-07-21 09:20:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:20:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 09:20:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1743 transitions. [2022-07-21 09:20:36,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5618955512572534 [2022-07-21 09:20:36,466 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1743 transitions. [2022-07-21 09:20:36,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1743 transitions. [2022-07-21 09:20:36,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:36,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1743 transitions. [2022-07-21 09:20:36,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2022-07-21 09:20:36,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:20:36,469 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:20:36,469 INFO L186 Difference]: Start difference. First operand has 550 places, 578 transitions, 8531 flow. Second operand 33 states and 1743 transitions. [2022-07-21 09:20:36,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 597 transitions, 9733 flow [2022-07-21 09:20:36,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 597 transitions, 9462 flow, removed 12 selfloop flow, removed 34 redundant places. [2022-07-21 09:20:36,681 INFO L242 Difference]: Finished difference. Result has 540 places, 551 transitions, 8169 flow [2022-07-21 09:20:36,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=8266, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8169, PETRI_PLACES=540, PETRI_TRANSITIONS=551} [2022-07-21 09:20:36,682 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 452 predicate places. [2022-07-21 09:20:36,682 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 551 transitions, 8169 flow [2022-07-21 09:20:36,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:36,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:36,682 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] [2022-07-21 09:20:36,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-07-21 09:20:36,682 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1473183858, now seen corresponding path program 95 times [2022-07-21 09:20:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:36,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829169348] [2022-07-21 09:20:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829169348] [2022-07-21 09:20:37,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829169348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:37,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:37,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:20:37,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170984030] [2022-07-21 09:20:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:20:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:20:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:20:37,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:37,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 551 transitions, 8169 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:37,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:37,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:37,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:38,784 INFO L129 PetriNetUnfolder]: 391/1270 cut-off events. [2022-07-21 09:20:38,784 INFO L130 PetriNetUnfolder]: For 26644/26644 co-relation queries the response was YES. [2022-07-21 09:20:38,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10327 conditions, 1270 events. 391/1270 cut-off events. For 26644/26644 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8329 event pairs, 50 based on Foata normal form. 1/1267 useless extension candidates. Maximal degree in co-relation 10137. Up to 904 conditions per place. [2022-07-21 09:20:38,806 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 438 selfloop transitions, 56 changer transitions 35/568 dead transitions. [2022-07-21 09:20:38,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 568 transitions, 9327 flow [2022-07-21 09:20:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:20:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:20:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1780 transitions. [2022-07-21 09:20:38,808 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5569461827284106 [2022-07-21 09:20:38,808 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1780 transitions. [2022-07-21 09:20:38,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1780 transitions. [2022-07-21 09:20:38,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:38,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1780 transitions. [2022-07-21 09:20:38,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.35294117647059) internal successors, (1780), 34 states have internal predecessors, (1780), 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) [2022-07-21 09:20:38,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:38,811 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:38,811 INFO L186 Difference]: Start difference. First operand has 540 places, 551 transitions, 8169 flow. Second operand 34 states and 1780 transitions. [2022-07-21 09:20:38,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 568 transitions, 9327 flow [2022-07-21 09:20:39,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 568 transitions, 9024 flow, removed 24 selfloop flow, removed 46 redundant places. [2022-07-21 09:20:39,033 INFO L242 Difference]: Finished difference. Result has 513 places, 524 transitions, 7751 flow [2022-07-21 09:20:39,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7874, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7751, PETRI_PLACES=513, PETRI_TRANSITIONS=524} [2022-07-21 09:20:39,033 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 425 predicate places. [2022-07-21 09:20:39,033 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 524 transitions, 7751 flow [2022-07-21 09:20:39,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:39,033 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:39,034 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] [2022-07-21 09:20:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-07-21 09:20:39,034 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1422773864, now seen corresponding path program 96 times [2022-07-21 09:20:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:39,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788546652] [2022-07-21 09:20:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788546652] [2022-07-21 09:20:39,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788546652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:39,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:39,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:20:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677920189] [2022-07-21 09:20:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:39,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:20:39,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:20:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:20:39,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:39,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 524 transitions, 7751 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:39,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:39,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:39,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:40,827 INFO L129 PetriNetUnfolder]: 389/1246 cut-off events. [2022-07-21 09:20:40,827 INFO L130 PetriNetUnfolder]: For 25251/25251 co-relation queries the response was YES. [2022-07-21 09:20:40,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10042 conditions, 1246 events. 389/1246 cut-off events. For 25251/25251 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8137 event pairs, 49 based on Foata normal form. 1/1244 useless extension candidates. Maximal degree in co-relation 9862. Up to 800 conditions per place. [2022-07-21 09:20:40,842 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 366 selfloop transitions, 131 changer transitions 25/561 dead transitions. [2022-07-21 09:20:40,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 561 transitions, 9232 flow [2022-07-21 09:20:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 09:20:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 09:20:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1852 transitions. [2022-07-21 09:20:40,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.562917933130699 [2022-07-21 09:20:40,844 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1852 transitions. [2022-07-21 09:20:40,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1852 transitions. [2022-07-21 09:20:40,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:40,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1852 transitions. [2022-07-21 09:20:40,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.91428571428571) internal successors, (1852), 35 states have internal predecessors, (1852), 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) [2022-07-21 09:20:40,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:40,847 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 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) [2022-07-21 09:20:40,847 INFO L186 Difference]: Start difference. First operand has 513 places, 524 transitions, 7751 flow. Second operand 35 states and 1852 transitions. [2022-07-21 09:20:40,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 561 transitions, 9232 flow [2022-07-21 09:20:41,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 561 transitions, 8726 flow, removed 94 selfloop flow, removed 37 redundant places. [2022-07-21 09:20:41,058 INFO L242 Difference]: Finished difference. Result has 481 places, 520 transitions, 7533 flow [2022-07-21 09:20:41,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7297, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7533, PETRI_PLACES=481, PETRI_TRANSITIONS=520} [2022-07-21 09:20:41,059 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 393 predicate places. [2022-07-21 09:20:41,059 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 520 transitions, 7533 flow [2022-07-21 09:20:41,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:41,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:41,059 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] [2022-07-21 09:20:41,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-07-21 09:20:41,060 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1588163428, now seen corresponding path program 97 times [2022-07-21 09:20:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781809393] [2022-07-21 09:20:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:41,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:41,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:41,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781809393] [2022-07-21 09:20:41,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781809393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:41,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:41,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732357140] [2022-07-21 09:20:41,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:41,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:41,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:41,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:41,413 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:41,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 520 transitions, 7533 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:41,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:41,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:41,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:43,817 INFO L129 PetriNetUnfolder]: 387/1255 cut-off events. [2022-07-21 09:20:43,817 INFO L130 PetriNetUnfolder]: For 21817/21817 co-relation queries the response was YES. [2022-07-21 09:20:43,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9554 conditions, 1255 events. 387/1255 cut-off events. For 21817/21817 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8227 event pairs, 49 based on Foata normal form. 1/1253 useless extension candidates. Maximal degree in co-relation 9386. Up to 795 conditions per place. [2022-07-21 09:20:43,832 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 361 selfloop transitions, 113 changer transitions 47/560 dead transitions. [2022-07-21 09:20:43,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 560 transitions, 8943 flow [2022-07-21 09:20:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:20:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:20:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1799 transitions. [2022-07-21 09:20:43,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5628911138923655 [2022-07-21 09:20:43,833 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1799 transitions. [2022-07-21 09:20:43,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1799 transitions. [2022-07-21 09:20:43,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:43,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1799 transitions. [2022-07-21 09:20:43,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.911764705882355) internal successors, (1799), 34 states have internal predecessors, (1799), 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) [2022-07-21 09:20:43,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:43,837 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:43,837 INFO L186 Difference]: Start difference. First operand has 481 places, 520 transitions, 7533 flow. Second operand 34 states and 1799 transitions. [2022-07-21 09:20:43,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 560 transitions, 8943 flow [2022-07-21 09:20:43,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 560 transitions, 8563 flow, removed 68 selfloop flow, removed 29 redundant places. [2022-07-21 09:20:43,997 INFO L242 Difference]: Finished difference. Result has 487 places, 497 transitions, 7073 flow [2022-07-21 09:20:43,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7073, PETRI_PLACES=487, PETRI_TRANSITIONS=497} [2022-07-21 09:20:43,998 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 399 predicate places. [2022-07-21 09:20:43,998 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 497 transitions, 7073 flow [2022-07-21 09:20:43,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:43,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:43,998 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] [2022-07-21 09:20:43,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-07-21 09:20:43,998 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 265413890, now seen corresponding path program 98 times [2022-07-21 09:20:43,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:43,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789715932] [2022-07-21 09:20:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:43,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:44,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789715932] [2022-07-21 09:20:44,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789715932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:44,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:44,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:20:44,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937850850] [2022-07-21 09:20:44,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:44,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:20:44,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:20:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:20:44,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:44,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 497 transitions, 7073 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:44,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:44,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:44,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:47,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:20:50,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:20:50,552 INFO L129 PetriNetUnfolder]: 369/1221 cut-off events. [2022-07-21 09:20:50,552 INFO L130 PetriNetUnfolder]: For 22130/22130 co-relation queries the response was YES. [2022-07-21 09:20:50,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9303 conditions, 1221 events. 369/1221 cut-off events. For 22130/22130 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7958 event pairs, 41 based on Foata normal form. 1/1218 useless extension candidates. Maximal degree in co-relation 9131. Up to 808 conditions per place. [2022-07-21 09:20:50,575 INFO L132 encePairwiseOnDemand]: 63/94 looper letters, 366 selfloop transitions, 109 changer transitions 17/531 dead transitions. [2022-07-21 09:20:50,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 531 transitions, 8451 flow [2022-07-21 09:20:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:20:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:20:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1996 transitions. [2022-07-21 09:20:50,608 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5587905935050392 [2022-07-21 09:20:50,608 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1996 transitions. [2022-07-21 09:20:50,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1996 transitions. [2022-07-21 09:20:50,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:50,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1996 transitions. [2022-07-21 09:20:50,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.526315789473685) internal successors, (1996), 38 states have internal predecessors, (1996), 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) [2022-07-21 09:20:50,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:20:50,612 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:20:50,612 INFO L186 Difference]: Start difference. First operand has 487 places, 497 transitions, 7073 flow. Second operand 38 states and 1996 transitions. [2022-07-21 09:20:50,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 531 transitions, 8451 flow [2022-07-21 09:20:50,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 531 transitions, 8086 flow, removed 63 selfloop flow, removed 33 redundant places. [2022-07-21 09:20:50,772 INFO L242 Difference]: Finished difference. Result has 494 places, 498 transitions, 7029 flow [2022-07-21 09:20:50,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6745, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7029, PETRI_PLACES=494, PETRI_TRANSITIONS=498} [2022-07-21 09:20:50,773 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 406 predicate places. [2022-07-21 09:20:50,773 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 498 transitions, 7029 flow [2022-07-21 09:20:50,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:50,773 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:50,773 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] [2022-07-21 09:20:50,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-07-21 09:20:50,773 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1293835986, now seen corresponding path program 99 times [2022-07-21 09:20:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848093352] [2022-07-21 09:20:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:51,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848093352] [2022-07-21 09:20:51,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848093352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:51,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:51,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:20:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398555854] [2022-07-21 09:20:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:20:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:20:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:20:51,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:51,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 498 transitions, 7029 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:51,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:51,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:51,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:54,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:20:55,024 INFO L129 PetriNetUnfolder]: 364/1196 cut-off events. [2022-07-21 09:20:55,025 INFO L130 PetriNetUnfolder]: For 21614/21614 co-relation queries the response was YES. [2022-07-21 09:20:55,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9115 conditions, 1196 events. 364/1196 cut-off events. For 21614/21614 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7733 event pairs, 35 based on Foata normal form. 1/1194 useless extension candidates. Maximal degree in co-relation 8942. Up to 801 conditions per place. [2022-07-21 09:20:55,047 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 362 selfloop transitions, 74 changer transitions 45/520 dead transitions. [2022-07-21 09:20:55,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 520 transitions, 8117 flow [2022-07-21 09:20:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:20:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:20:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1789 transitions. [2022-07-21 09:20:55,049 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5597622027534418 [2022-07-21 09:20:55,049 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1789 transitions. [2022-07-21 09:20:55,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1789 transitions. [2022-07-21 09:20:55,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:55,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1789 transitions. [2022-07-21 09:20:55,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.61764705882353) internal successors, (1789), 34 states have internal predecessors, (1789), 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) [2022-07-21 09:20:55,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:55,052 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:20:55,053 INFO L186 Difference]: Start difference. First operand has 494 places, 498 transitions, 7029 flow. Second operand 34 states and 1789 transitions. [2022-07-21 09:20:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 520 transitions, 8117 flow [2022-07-21 09:20:55,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 520 transitions, 7834 flow, removed 58 selfloop flow, removed 30 redundant places. [2022-07-21 09:20:55,279 INFO L242 Difference]: Finished difference. Result has 494 places, 463 transitions, 6227 flow [2022-07-21 09:20:55,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=6752, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6227, PETRI_PLACES=494, PETRI_TRANSITIONS=463} [2022-07-21 09:20:55,280 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 406 predicate places. [2022-07-21 09:20:55,280 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 463 transitions, 6227 flow [2022-07-21 09:20:55,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:20:55,280 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:55,280 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] [2022-07-21 09:20:55,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-07-21 09:20:55,281 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash 468221712, now seen corresponding path program 100 times [2022-07-21 09:20:55,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:55,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846118353] [2022-07-21 09:20:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:55,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:55,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:55,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846118353] [2022-07-21 09:20:55,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846118353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:55,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:55,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:20:55,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147013893] [2022-07-21 09:20:55,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:20:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:20:55,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:20:55,644 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:55,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 463 transitions, 6227 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:55,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:55,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:55,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:57,560 INFO L129 PetriNetUnfolder]: 350/1123 cut-off events. [2022-07-21 09:20:57,561 INFO L130 PetriNetUnfolder]: For 19943/19943 co-relation queries the response was YES. [2022-07-21 09:20:57,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8547 conditions, 1123 events. 350/1123 cut-off events. For 19943/19943 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7064 event pairs, 40 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 8374. Up to 767 conditions per place. [2022-07-21 09:20:57,579 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 339 selfloop transitions, 77 changer transitions 31/486 dead transitions. [2022-07-21 09:20:57,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 486 transitions, 7282 flow [2022-07-21 09:20:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:20:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:20:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2022-07-21 09:20:57,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2022-07-21 09:20:57,580 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2022-07-21 09:20:57,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2022-07-21 09:20:57,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:57,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2022-07-21 09:20:57,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 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) [2022-07-21 09:20:57,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:20:57,583 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:20:57,583 INFO L186 Difference]: Start difference. First operand has 494 places, 463 transitions, 6227 flow. Second operand 31 states and 1639 transitions. [2022-07-21 09:20:57,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 486 transitions, 7282 flow [2022-07-21 09:20:57,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 486 transitions, 6831 flow, removed 55 selfloop flow, removed 48 redundant places. [2022-07-21 09:20:57,737 INFO L242 Difference]: Finished difference. Result has 453 places, 443 transitions, 5637 flow [2022-07-21 09:20:57,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5637, PETRI_PLACES=453, PETRI_TRANSITIONS=443} [2022-07-21 09:20:57,738 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 365 predicate places. [2022-07-21 09:20:57,738 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 443 transitions, 5637 flow [2022-07-21 09:20:57,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 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) [2022-07-21 09:20:57,738 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:57,738 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] [2022-07-21 09:20:57,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-07-21 09:20:57,739 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1278999580, now seen corresponding path program 101 times [2022-07-21 09:20:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:57,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875601252] [2022-07-21 09:20:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:58,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875601252] [2022-07-21 09:20:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875601252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:58,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:58,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998614675] [2022-07-21 09:20:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:58,099 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:58,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 443 transitions, 5637 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:58,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:58,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:58,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:59,380 INFO L129 PetriNetUnfolder]: 343/1097 cut-off events. [2022-07-21 09:20:59,381 INFO L130 PetriNetUnfolder]: For 17570/17570 co-relation queries the response was YES. [2022-07-21 09:20:59,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7969 conditions, 1097 events. 343/1097 cut-off events. For 17570/17570 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6786 event pairs, 37 based on Foata normal form. 1/1096 useless extension candidates. Maximal degree in co-relation 7810. Up to 757 conditions per place. [2022-07-21 09:20:59,398 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 329 selfloop transitions, 55 changer transitions 42/465 dead transitions. [2022-07-21 09:20:59,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 465 transitions, 6607 flow [2022-07-21 09:20:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:20:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 09:20:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1632 transitions. [2022-07-21 09:20:59,400 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5600549073438572 [2022-07-21 09:20:59,400 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1632 transitions. [2022-07-21 09:20:59,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1632 transitions. [2022-07-21 09:20:59,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:59,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1632 transitions. [2022-07-21 09:20:59,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.645161290322584) internal successors, (1632), 31 states have internal predecessors, (1632), 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) [2022-07-21 09:20:59,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:20:59,404 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 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) [2022-07-21 09:20:59,404 INFO L186 Difference]: Start difference. First operand has 453 places, 443 transitions, 5637 flow. Second operand 31 states and 1632 transitions. [2022-07-21 09:20:59,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 465 transitions, 6607 flow [2022-07-21 09:20:59,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 465 transitions, 6333 flow, removed 31 selfloop flow, removed 36 redundant places. [2022-07-21 09:20:59,543 INFO L242 Difference]: Finished difference. Result has 438 places, 414 transitions, 5056 flow [2022-07-21 09:20:59,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5056, PETRI_PLACES=438, PETRI_TRANSITIONS=414} [2022-07-21 09:20:59,544 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 350 predicate places. [2022-07-21 09:20:59,544 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 414 transitions, 5056 flow [2022-07-21 09:20:59,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:59,544 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:59,544 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] [2022-07-21 09:20:59,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-07-21 09:20:59,544 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash 300698978, now seen corresponding path program 102 times [2022-07-21 09:20:59,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:59,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729293276] [2022-07-21 09:20:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:59,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:59,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729293276] [2022-07-21 09:20:59,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729293276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:59,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:20:59,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:20:59,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180153194] [2022-07-21 09:20:59,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:59,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:20:59,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:20:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:20:59,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:20:59,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 414 transitions, 5056 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:20:59,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:59,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:20:59,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:01,308 INFO L129 PetriNetUnfolder]: 337/1058 cut-off events. [2022-07-21 09:21:01,309 INFO L130 PetriNetUnfolder]: For 16796/16796 co-relation queries the response was YES. [2022-07-21 09:21:01,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7582 conditions, 1058 events. 337/1058 cut-off events. For 16796/16796 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6420 event pairs, 37 based on Foata normal form. 1/1057 useless extension candidates. Maximal degree in co-relation 7428. Up to 715 conditions per place. [2022-07-21 09:21:01,322 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 295 selfloop transitions, 89 changer transitions 19/442 dead transitions. [2022-07-21 09:21:01,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 442 transitions, 6104 flow [2022-07-21 09:21:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:21:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:21:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1691 transitions. [2022-07-21 09:21:01,323 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5621675531914894 [2022-07-21 09:21:01,323 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1691 transitions. [2022-07-21 09:21:01,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1691 transitions. [2022-07-21 09:21:01,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:01,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1691 transitions. [2022-07-21 09:21:01,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 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) [2022-07-21 09:21:01,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:21:01,326 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 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) [2022-07-21 09:21:01,326 INFO L186 Difference]: Start difference. First operand has 438 places, 414 transitions, 5056 flow. Second operand 32 states and 1691 transitions. [2022-07-21 09:21:01,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 442 transitions, 6104 flow [2022-07-21 09:21:01,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 442 transitions, 5704 flow, removed 62 selfloop flow, removed 39 redundant places. [2022-07-21 09:21:01,431 INFO L242 Difference]: Finished difference. Result has 411 places, 411 transitions, 4851 flow [2022-07-21 09:21:01,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4851, PETRI_PLACES=411, PETRI_TRANSITIONS=411} [2022-07-21 09:21:01,431 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 323 predicate places. [2022-07-21 09:21:01,431 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 411 transitions, 4851 flow [2022-07-21 09:21:01,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:21:01,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:01,432 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] [2022-07-21 09:21:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-07-21 09:21:01,432 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1747928764, now seen corresponding path program 103 times [2022-07-21 09:21:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:01,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909831447] [2022-07-21 09:21:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:01,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:01,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909831447] [2022-07-21 09:21:01,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909831447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:01,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:01,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:21:01,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986266516] [2022-07-21 09:21:01,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:01,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:21:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:01,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:21:01,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:21:01,797 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:21:01,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 411 transitions, 4851 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:21:01,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:01,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:21:01,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:03,295 INFO L129 PetriNetUnfolder]: 336/1064 cut-off events. [2022-07-21 09:21:03,295 INFO L130 PetriNetUnfolder]: For 15675/15675 co-relation queries the response was YES. [2022-07-21 09:21:03,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7373 conditions, 1064 events. 336/1064 cut-off events. For 15675/15675 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6478 event pairs, 52 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 7229. Up to 666 conditions per place. [2022-07-21 09:21:03,306 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 259 selfloop transitions, 121 changer transitions 27/446 dead transitions. [2022-07-21 09:21:03,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 446 transitions, 6014 flow [2022-07-21 09:21:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:21:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:21:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1903 transitions. [2022-07-21 09:21:03,308 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5623522458628841 [2022-07-21 09:21:03,308 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1903 transitions. [2022-07-21 09:21:03,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1903 transitions. [2022-07-21 09:21:03,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:03,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1903 transitions. [2022-07-21 09:21:03,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 52.861111111111114) internal successors, (1903), 36 states have internal predecessors, (1903), 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) [2022-07-21 09:21:03,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:21:03,311 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 94.0) internal successors, (3478), 37 states have internal predecessors, (3478), 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) [2022-07-21 09:21:03,311 INFO L186 Difference]: Start difference. First operand has 411 places, 411 transitions, 4851 flow. Second operand 36 states and 1903 transitions. [2022-07-21 09:21:03,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 446 transitions, 6014 flow [2022-07-21 09:21:03,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 446 transitions, 5673 flow, removed 32 selfloop flow, removed 36 redundant places. [2022-07-21 09:21:03,412 INFO L242 Difference]: Finished difference. Result has 409 places, 403 transitions, 4774 flow [2022-07-21 09:21:03,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4538, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4774, PETRI_PLACES=409, PETRI_TRANSITIONS=403} [2022-07-21 09:21:03,412 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 321 predicate places. [2022-07-21 09:21:03,413 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 403 transitions, 4774 flow [2022-07-21 09:21:03,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:21:03,413 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:03,413 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] [2022-07-21 09:21:03,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-07-21 09:21:03,413 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:03,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1757863236, now seen corresponding path program 104 times [2022-07-21 09:21:03,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:03,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62644429] [2022-07-21 09:21:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:03,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:03,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:03,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62644429] [2022-07-21 09:21:03,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62644429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:03,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:03,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:21:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260348139] [2022-07-21 09:21:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:03,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:21:03,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:21:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:21:03,770 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:21:03,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 403 transitions, 4774 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:03,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:03,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:21:03,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:06,188 INFO L129 PetriNetUnfolder]: 336/1074 cut-off events. [2022-07-21 09:21:06,188 INFO L130 PetriNetUnfolder]: For 14722/14722 co-relation queries the response was YES. [2022-07-21 09:21:06,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7372 conditions, 1074 events. 336/1074 cut-off events. For 14722/14722 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6582 event pairs, 53 based on Foata normal form. 1/1073 useless extension candidates. Maximal degree in co-relation 7232. Up to 690 conditions per place. [2022-07-21 09:21:06,206 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 274 selfloop transitions, 107 changer transitions 26/446 dead transitions. [2022-07-21 09:21:06,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 446 transitions, 6183 flow [2022-07-21 09:21:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:21:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:21:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2050 transitions. [2022-07-21 09:21:06,208 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5591925804691762 [2022-07-21 09:21:06,208 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2050 transitions. [2022-07-21 09:21:06,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2050 transitions. [2022-07-21 09:21:06,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:06,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2050 transitions. [2022-07-21 09:21:06,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.56410256410256) internal successors, (2050), 39 states have internal predecessors, (2050), 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) [2022-07-21 09:21:06,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:21:06,213 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 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) [2022-07-21 09:21:06,213 INFO L186 Difference]: Start difference. First operand has 409 places, 403 transitions, 4774 flow. Second operand 39 states and 2050 transitions. [2022-07-21 09:21:06,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 446 transitions, 6183 flow [2022-07-21 09:21:06,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 446 transitions, 5839 flow, removed 24 selfloop flow, removed 35 redundant places. [2022-07-21 09:21:06,312 INFO L242 Difference]: Finished difference. Result has 412 places, 406 transitions, 4874 flow [2022-07-21 09:21:06,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4874, PETRI_PLACES=412, PETRI_TRANSITIONS=406} [2022-07-21 09:21:06,312 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 324 predicate places. [2022-07-21 09:21:06,312 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 406 transitions, 4874 flow [2022-07-21 09:21:06,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:06,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:06,313 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] [2022-07-21 09:21:06,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-07-21 09:21:06,313 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash 794831750, now seen corresponding path program 105 times [2022-07-21 09:21:06,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:06,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397703717] [2022-07-21 09:21:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:06,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:06,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397703717] [2022-07-21 09:21:06,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397703717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:06,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:06,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:21:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676653388] [2022-07-21 09:21:06,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:06,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:21:06,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:21:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:21:06,675 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:21:06,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 406 transitions, 4874 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:06,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:06,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:21:06,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:10,031 INFO L129 PetriNetUnfolder]: 326/1064 cut-off events. [2022-07-21 09:21:10,031 INFO L130 PetriNetUnfolder]: For 15467/15467 co-relation queries the response was YES. [2022-07-21 09:21:10,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7261 conditions, 1064 events. 326/1064 cut-off events. For 15467/15467 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6558 event pairs, 41 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 7118. Up to 702 conditions per place. [2022-07-21 09:21:10,050 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 278 selfloop transitions, 98 changer transitions 19/434 dead transitions. [2022-07-21 09:21:10,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 434 transitions, 5905 flow [2022-07-21 09:21:10,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:21:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:21:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1941 transitions. [2022-07-21 09:21:10,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5580793559516963 [2022-07-21 09:21:10,058 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1941 transitions. [2022-07-21 09:21:10,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1941 transitions. [2022-07-21 09:21:10,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:10,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1941 transitions. [2022-07-21 09:21:10,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.45945945945946) internal successors, (1941), 37 states have internal predecessors, (1941), 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) [2022-07-21 09:21:10,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:21:10,065 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:21:10,065 INFO L186 Difference]: Start difference. First operand has 412 places, 406 transitions, 4874 flow. Second operand 37 states and 1941 transitions. [2022-07-21 09:21:10,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 434 transitions, 5905 flow [2022-07-21 09:21:10,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 434 transitions, 5625 flow, removed 54 selfloop flow, removed 35 redundant places. [2022-07-21 09:21:10,177 INFO L242 Difference]: Finished difference. Result has 412 places, 403 transitions, 4810 flow [2022-07-21 09:21:10,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4810, PETRI_PLACES=412, PETRI_TRANSITIONS=403} [2022-07-21 09:21:10,178 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 324 predicate places. [2022-07-21 09:21:10,178 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 403 transitions, 4810 flow [2022-07-21 09:21:10,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:10,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:10,178 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] [2022-07-21 09:21:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-07-21 09:21:10,178 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1213735676, now seen corresponding path program 106 times [2022-07-21 09:21:10,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:10,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577653743] [2022-07-21 09:21:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:10,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:10,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:10,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577653743] [2022-07-21 09:21:10,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577653743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:10,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:10,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:21:10,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700024296] [2022-07-21 09:21:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:10,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:21:10,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:21:10,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:21:10,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:21:10,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 403 transitions, 4810 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:21:10,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:10,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:21:10,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:12,036 INFO L129 PetriNetUnfolder]: 343/1116 cut-off events. [2022-07-21 09:21:12,036 INFO L130 PetriNetUnfolder]: For 16580/16580 co-relation queries the response was YES. [2022-07-21 09:21:12,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7608 conditions, 1116 events. 343/1116 cut-off events. For 16580/16580 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6998 event pairs, 40 based on Foata normal form. 1/1115 useless extension candidates. Maximal degree in co-relation 7466. Up to 679 conditions per place. [2022-07-21 09:21:12,050 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 280 selfloop transitions, 132 changer transitions 27/478 dead transitions. [2022-07-21 09:21:12,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 478 transitions, 6682 flow [2022-07-21 09:21:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:21:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 09:21:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1746 transitions. [2022-07-21 09:21:12,052 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.562862669245648 [2022-07-21 09:21:12,052 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1746 transitions. [2022-07-21 09:21:12,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1746 transitions. [2022-07-21 09:21:12,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:12,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1746 transitions. [2022-07-21 09:21:12,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.90909090909091) internal successors, (1746), 33 states have internal predecessors, (1746), 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) [2022-07-21 09:21:12,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:21:12,055 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 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) [2022-07-21 09:21:12,055 INFO L186 Difference]: Start difference. First operand has 412 places, 403 transitions, 4810 flow. Second operand 33 states and 1746 transitions. [2022-07-21 09:21:12,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 478 transitions, 6682 flow [2022-07-21 09:21:12,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 478 transitions, 6371 flow, removed 14 selfloop flow, removed 38 redundant places. [2022-07-21 09:21:12,156 INFO L242 Difference]: Finished difference. Result has 407 places, 428 transitions, 5271 flow [2022-07-21 09:21:12,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5271, PETRI_PLACES=407, PETRI_TRANSITIONS=428} [2022-07-21 09:21:12,156 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 319 predicate places. [2022-07-21 09:21:12,156 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 428 transitions, 5271 flow [2022-07-21 09:21:12,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:21:12,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:12,156 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] [2022-07-21 09:21:12,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-07-21 09:21:12,157 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1813901322, now seen corresponding path program 107 times [2022-07-21 09:21:12,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:12,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397515039] [2022-07-21 09:21:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:12,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:12,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397515039] [2022-07-21 09:21:12,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397515039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:12,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:12,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:21:12,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721962450] [2022-07-21 09:21:12,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:12,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:21:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:21:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:21:12,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:21:12,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 428 transitions, 5271 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:12,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:12,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:21:12,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:14,112 INFO L129 PetriNetUnfolder]: 340/1089 cut-off events. [2022-07-21 09:21:14,112 INFO L130 PetriNetUnfolder]: For 17258/17258 co-relation queries the response was YES. [2022-07-21 09:21:14,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7661 conditions, 1089 events. 340/1089 cut-off events. For 17258/17258 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6680 event pairs, 56 based on Foata normal form. 1/1088 useless extension candidates. Maximal degree in co-relation 7518. Up to 668 conditions per place. [2022-07-21 09:21:14,127 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 285 selfloop transitions, 134 changer transitions 18/476 dead transitions. [2022-07-21 09:21:14,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 476 transitions, 6933 flow [2022-07-21 09:21:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:21:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:21:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1946 transitions. [2022-07-21 09:21:14,129 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5595169637722829 [2022-07-21 09:21:14,129 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1946 transitions. [2022-07-21 09:21:14,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1946 transitions. [2022-07-21 09:21:14,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:14,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1946 transitions. [2022-07-21 09:21:14,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.5945945945946) internal successors, (1946), 37 states have internal predecessors, (1946), 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) [2022-07-21 09:21:14,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:21:14,132 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 94.0) internal successors, (3572), 38 states have internal predecessors, (3572), 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) [2022-07-21 09:21:14,132 INFO L186 Difference]: Start difference. First operand has 407 places, 428 transitions, 5271 flow. Second operand 37 states and 1946 transitions. [2022-07-21 09:21:14,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 476 transitions, 6933 flow [2022-07-21 09:21:14,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 476 transitions, 6558 flow, removed 128 selfloop flow, removed 24 redundant places. [2022-07-21 09:21:14,271 INFO L242 Difference]: Finished difference. Result has 421 places, 438 transitions, 5537 flow [2022-07-21 09:21:14,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5022, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5537, PETRI_PLACES=421, PETRI_TRANSITIONS=438} [2022-07-21 09:21:14,272 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 333 predicate places. [2022-07-21 09:21:14,272 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 438 transitions, 5537 flow [2022-07-21 09:21:14,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:14,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:14,272 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] [2022-07-21 09:21:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-07-21 09:21:14,273 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1223008698, now seen corresponding path program 108 times [2022-07-21 09:21:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:14,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287559296] [2022-07-21 09:21:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:14,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287559296] [2022-07-21 09:21:14,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287559296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:14,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:14,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:21:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635172188] [2022-07-21 09:21:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:14,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:21:14,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:21:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:21:14,624 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:21:14,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 438 transitions, 5537 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:14,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:14,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:21:14,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:16,260 INFO L129 PetriNetUnfolder]: 340/1086 cut-off events. [2022-07-21 09:21:16,261 INFO L130 PetriNetUnfolder]: For 16244/16244 co-relation queries the response was YES. [2022-07-21 09:21:16,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7656 conditions, 1086 events. 340/1086 cut-off events. For 16244/16244 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6641 event pairs, 41 based on Foata normal form. 1/1085 useless extension candidates. Maximal degree in co-relation 7512. Up to 632 conditions per place. [2022-07-21 09:21:16,276 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 249 selfloop transitions, 173 changer transitions 18/479 dead transitions. [2022-07-21 09:21:16,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 479 transitions, 7117 flow [2022-07-21 09:21:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:21:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:21:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1999 transitions. [2022-07-21 09:21:16,278 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5596304591265397 [2022-07-21 09:21:16,278 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1999 transitions. [2022-07-21 09:21:16,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1999 transitions. [2022-07-21 09:21:16,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:16,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1999 transitions. [2022-07-21 09:21:16,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 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) [2022-07-21 09:21:16,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:21:16,281 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 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) [2022-07-21 09:21:16,282 INFO L186 Difference]: Start difference. First operand has 421 places, 438 transitions, 5537 flow. Second operand 38 states and 1999 transitions. [2022-07-21 09:21:16,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 479 transitions, 7117 flow [2022-07-21 09:21:16,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 479 transitions, 6777 flow, removed 101 selfloop flow, removed 28 redundant places. [2022-07-21 09:21:16,399 INFO L242 Difference]: Finished difference. Result has 432 places, 446 transitions, 5933 flow [2022-07-21 09:21:16,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5933, PETRI_PLACES=432, PETRI_TRANSITIONS=446} [2022-07-21 09:21:16,400 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 344 predicate places. [2022-07-21 09:21:16,400 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 446 transitions, 5933 flow [2022-07-21 09:21:16,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 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) [2022-07-21 09:21:16,400 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:16,400 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] [2022-07-21 09:21:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-07-21 09:21:16,400 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 948382796, now seen corresponding path program 109 times [2022-07-21 09:21:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547461690] [2022-07-21 09:21:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:16,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:16,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547461690] [2022-07-21 09:21:16,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547461690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:16,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:16,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:21:16,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334611448] [2022-07-21 09:21:16,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:16,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:21:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:21:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:21:16,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2022-07-21 09:21:16,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 446 transitions, 5933 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:21:16,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:16,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2022-07-21 09:21:16,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:18,351 INFO L129 PetriNetUnfolder]: 342/1084 cut-off events. [2022-07-21 09:21:18,351 INFO L130 PetriNetUnfolder]: For 16422/16422 co-relation queries the response was YES. [2022-07-21 09:21:18,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1084 events. 342/1084 cut-off events. For 16422/16422 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6627 event pairs, 56 based on Foata normal form. 1/1083 useless extension candidates. Maximal degree in co-relation 7736. Up to 687 conditions per place. [2022-07-21 09:21:18,367 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 301 selfloop transitions, 135 changer transitions 20/495 dead transitions. [2022-07-21 09:21:18,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 495 transitions, 7607 flow [2022-07-21 09:21:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:21:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:21:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1796 transitions. [2022-07-21 09:21:18,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5619524405506884 [2022-07-21 09:21:18,369 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1796 transitions. [2022-07-21 09:21:18,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1796 transitions. [2022-07-21 09:21:18,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:18,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1796 transitions. [2022-07-21 09:21:18,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.8235294117647) internal successors, (1796), 34 states have internal predecessors, (1796), 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) [2022-07-21 09:21:18,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:21:18,372 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 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) [2022-07-21 09:21:18,372 INFO L186 Difference]: Start difference. First operand has 432 places, 446 transitions, 5933 flow. Second operand 34 states and 1796 transitions. [2022-07-21 09:21:18,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 495 transitions, 7607 flow [2022-07-21 09:21:18,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 495 transitions, 7230 flow, removed 76 selfloop flow, removed 34 redundant places. [2022-07-21 09:21:18,499 INFO L242 Difference]: Finished difference. Result has 433 places, 458 transitions, 6221 flow [2022-07-21 09:21:18,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=5597, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6221, PETRI_PLACES=433, PETRI_TRANSITIONS=458} [2022-07-21 09:21:18,499 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, 345 predicate places. [2022-07-21 09:21:18,499 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 458 transitions, 6221 flow [2022-07-21 09:21:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 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) [2022-07-21 09:21:18,500 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:18,500 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] [2022-07-21 09:21:18,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-07-21 09:21:18,500 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:21:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash 165777548, now seen corresponding path program 110 times [2022-07-21 09:21:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:18,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713398109] [2022-07-21 09:21:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat