./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-easy11.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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:41:13,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:41:13,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:41:13,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:41:13,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:41:13,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:41:13,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:41:13,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:41:13,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:41:13,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:41:13,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:41:13,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:41:13,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:41:13,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:41:13,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:41:13,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:41:13,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:41:13,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:41:13,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:41:13,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:41:13,313 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:41:13,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:41:13,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:41:13,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:41:13,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:41:13,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:41:13,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:41:13,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:41:13,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:41:13,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:41:13,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:41:13,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:41:13,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:41:13,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:41:13,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:41:13,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:41:13,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:41:13,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:41:13,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:41:13,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:41:13,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:41:13,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:41:13,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:41:13,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:41:13,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:41:13,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:41:13,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:41:13,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:41:13,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:41:13,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:41:13,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:41:13,353 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:41:13,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:41:13,354 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:41:13,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:41:13,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:41:13,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:41:13,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:41:13,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:41:13,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:41:13,355 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:41:13,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:41:13,356 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:41:13,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:41:13,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:41:13,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:41:13,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:41:13,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:41:13,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:41:13,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:41:13,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:41:13,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:41:13,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:41:13,358 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:41:13,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:41:13,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:41:13,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-07-12 10:41:13,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:41:13,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:41:13,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:41:13,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:41:13,563 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:41:13,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-12 10:41:13,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925e818bb/e561613c35e8464db5902f9aa4a41db0/FLAG3fba8271f [2022-07-12 10:41:13,970 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:41:13,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-12 10:41:13,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925e818bb/e561613c35e8464db5902f9aa4a41db0/FLAG3fba8271f [2022-07-12 10:41:13,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925e818bb/e561613c35e8464db5902f9aa4a41db0 [2022-07-12 10:41:13,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:41:13,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:41:13,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:41:13,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:41:13,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:41:13,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:41:13" (1/1) ... [2022-07-12 10:41:13,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449dde9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:13, skipping insertion in model container [2022-07-12 10:41:13,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:41:13" (1/1) ... [2022-07-12 10:41:14,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:41:14,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:41:14,151 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-easy11.wvr.c[2005,2018] [2022-07-12 10:41:14,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:41:14,157 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:41:14,169 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-easy11.wvr.c[2005,2018] [2022-07-12 10:41:14,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:41:14,177 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:41:14,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14 WrapperNode [2022-07-12 10:41:14,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:41:14,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:41:14,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:41:14,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:41:14,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,198 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-07-12 10:41:14,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:41:14,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:41:14,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:41:14,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:41:14,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:41:14,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:41:14,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:41:14,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:41:14,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (1/1) ... [2022-07-12 10:41:14,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:41:14,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:14,248 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) [2022-07-12 10:41:14,254 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 [2022-07-12 10:41:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:41:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:41:14,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:41:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:41:14,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:41:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:41:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:41:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:41:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:41:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:41:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:41:14,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:41:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:41:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:41:14,287 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:41:14,335 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:41:14,337 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:41:14,444 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:41:14,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:41:14,449 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:41:14,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:41:14 BoogieIcfgContainer [2022-07-12 10:41:14,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:41:14,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:41:14,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:41:14,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:41:14,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:41:13" (1/3) ... [2022-07-12 10:41:14,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b23905c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:41:14, skipping insertion in model container [2022-07-12 10:41:14,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:41:14" (2/3) ... [2022-07-12 10:41:14,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b23905c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:41:14, skipping insertion in model container [2022-07-12 10:41:14,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:41:14" (3/3) ... [2022-07-12 10:41:14,456 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-07-12 10:41:14,460 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:41:14,501 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:41:14,502 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:41:14,502 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:41:14,535 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:41:14,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-12 10:41:14,657 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-12 10:41:14,657 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:41:14,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-07-12 10:41:14,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-12 10:41:14,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-12 10:41:14,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:41:14,684 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@627b9edd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@730ddb4a [2022-07-12 10:41:14,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:41:14,708 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-12 10:41:14,711 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:41:14,711 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:14,711 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] [2022-07-12 10:41:14,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash 988547457, now seen corresponding path program 1 times [2022-07-12 10:41:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832384397] [2022-07-12 10:41:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:14,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:15,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832384397] [2022-07-12 10:41:15,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832384397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:15,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:15,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019799979] [2022-07-12 10:41:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:15,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:15,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:15,235 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:15,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:15,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:15,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:15,477 INFO L129 PetriNetUnfolder]: 90/301 cut-off events. [2022-07-12 10:41:15,477 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-12 10:41:15,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 301 events. 90/301 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1193 event pairs, 29 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 412. Up to 60 conditions per place. [2022-07-12 10:41:15,480 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 55 selfloop transitions, 16 changer transitions 10/122 dead transitions. [2022-07-12 10:41:15,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 427 flow [2022-07-12 10:41:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 10:41:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-12 10:41:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-07-12 10:41:15,493 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6537356321839081 [2022-07-12 10:41:15,493 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-07-12 10:41:15,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-07-12 10:41:15,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:15,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-07-12 10:41:15,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 87.0) internal successors, (1479), 17 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,508 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 87.0) internal successors, (1479), 17 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,509 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 16 states and 910 transitions. [2022-07-12 10:41:15,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 427 flow [2022-07-12 10:41:15,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:41:15,514 INFO L242 Difference]: Finished difference. Result has 95 places, 82 transitions, 241 flow [2022-07-12 10:41:15,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=241, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2022-07-12 10:41:15,518 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 18 predicate places. [2022-07-12 10:41:15,518 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 241 flow [2022-07-12 10:41:15,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:15,519 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] [2022-07-12 10:41:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:41:15,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -606779393, now seen corresponding path program 2 times [2022-07-12 10:41:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174495241] [2022-07-12 10:41:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174495241] [2022-07-12 10:41:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174495241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:15,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:15,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770138731] [2022-07-12 10:41:15,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:15,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:15,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:15,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:15,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:15,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:15,903 INFO L129 PetriNetUnfolder]: 137/421 cut-off events. [2022-07-12 10:41:15,903 INFO L130 PetriNetUnfolder]: For 160/162 co-relation queries the response was YES. [2022-07-12 10:41:15,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 421 events. 137/421 cut-off events. For 160/162 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2067 event pairs, 24 based on Foata normal form. 3/421 useless extension candidates. Maximal degree in co-relation 944. Up to 82 conditions per place. [2022-07-12 10:41:15,906 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 23 changer transitions 8/141 dead transitions. [2022-07-12 10:41:15,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 141 transitions, 660 flow [2022-07-12 10:41:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-07-12 10:41:15,909 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-07-12 10:41:15,909 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-07-12 10:41:15,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-07-12 10:41:15,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:15,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-07-12 10:41:15,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,913 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,913 INFO L186 Difference]: Start difference. First operand has 95 places, 82 transitions, 241 flow. Second operand 14 states and 799 transitions. [2022-07-12 10:41:15,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 141 transitions, 660 flow [2022-07-12 10:41:15,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 644 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-07-12 10:41:15,918 INFO L242 Difference]: Finished difference. Result has 102 places, 96 transitions, 382 flow [2022-07-12 10:41:15,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=382, PETRI_PLACES=102, PETRI_TRANSITIONS=96} [2022-07-12 10:41:15,919 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2022-07-12 10:41:15,919 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 382 flow [2022-07-12 10:41:15,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:15,920 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] [2022-07-12 10:41:15,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:41:15,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456201, now seen corresponding path program 3 times [2022-07-12 10:41:15,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:15,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947077241] [2022-07-12 10:41:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:16,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:16,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947077241] [2022-07-12 10:41:16,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947077241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:16,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:16,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:16,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463483529] [2022-07-12 10:41:16,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:16,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:16,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:16,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:16,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 96 transitions, 382 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:16,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:16,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:16,368 INFO L129 PetriNetUnfolder]: 140/436 cut-off events. [2022-07-12 10:41:16,368 INFO L130 PetriNetUnfolder]: For 442/446 co-relation queries the response was YES. [2022-07-12 10:41:16,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 436 events. 140/436 cut-off events. For 442/446 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2103 event pairs, 32 based on Foata normal form. 5/434 useless extension candidates. Maximal degree in co-relation 1186. Up to 128 conditions per place. [2022-07-12 10:41:16,371 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 25 changer transitions 8/135 dead transitions. [2022-07-12 10:41:16,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 756 flow [2022-07-12 10:41:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-12 10:41:16,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-12 10:41:16,374 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-12 10:41:16,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-12 10:41:16,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:16,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-12 10:41:16,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,378 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,378 INFO L186 Difference]: Start difference. First operand has 102 places, 96 transitions, 382 flow. Second operand 14 states and 790 transitions. [2022-07-12 10:41:16,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 756 flow [2022-07-12 10:41:16,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 135 transitions, 696 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-07-12 10:41:16,383 INFO L242 Difference]: Finished difference. Result has 109 places, 101 transitions, 453 flow [2022-07-12 10:41:16,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=453, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2022-07-12 10:41:16,384 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 32 predicate places. [2022-07-12 10:41:16,384 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 453 flow [2022-07-12 10:41:16,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:16,385 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] [2022-07-12 10:41:16,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:41:16,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1891949299, now seen corresponding path program 4 times [2022-07-12 10:41:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:16,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399642297] [2022-07-12 10:41:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:16,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:16,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399642297] [2022-07-12 10:41:16,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399642297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:16,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:16,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:16,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253333854] [2022-07-12 10:41:16,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:16,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:16,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:16,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:16,539 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:16,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 453 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:16,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:16,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:16,788 INFO L129 PetriNetUnfolder]: 142/415 cut-off events. [2022-07-12 10:41:16,789 INFO L130 PetriNetUnfolder]: For 571/578 co-relation queries the response was YES. [2022-07-12 10:41:16,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 415 events. 142/415 cut-off events. For 571/578 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2012 event pairs, 36 based on Foata normal form. 5/413 useless extension candidates. Maximal degree in co-relation 1237. Up to 128 conditions per place. [2022-07-12 10:41:16,792 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 30 changer transitions 8/142 dead transitions. [2022-07-12 10:41:16,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 142 transitions, 860 flow [2022-07-12 10:41:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-12 10:41:16,794 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-12 10:41:16,794 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-12 10:41:16,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-12 10:41:16,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:16,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-12 10:41:16,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,798 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,799 INFO L186 Difference]: Start difference. First operand has 109 places, 101 transitions, 453 flow. Second operand 14 states and 792 transitions. [2022-07-12 10:41:16,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 142 transitions, 860 flow [2022-07-12 10:41:16,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 142 transitions, 776 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-12 10:41:16,803 INFO L242 Difference]: Finished difference. Result has 113 places, 106 transitions, 522 flow [2022-07-12 10:41:16,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=522, PETRI_PLACES=113, PETRI_TRANSITIONS=106} [2022-07-12 10:41:16,804 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 36 predicate places. [2022-07-12 10:41:16,804 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 106 transitions, 522 flow [2022-07-12 10:41:16,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:16,805 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] [2022-07-12 10:41:16,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:41:16,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:16,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:16,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1806850797, now seen corresponding path program 5 times [2022-07-12 10:41:16,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:16,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841562075] [2022-07-12 10:41:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:16,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:16,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:16,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841562075] [2022-07-12 10:41:16,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841562075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:16,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:16,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:16,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967939935] [2022-07-12 10:41:16,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:16,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:16,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:16,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:16,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:16,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 106 transitions, 522 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:16,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:16,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:16,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:17,229 INFO L129 PetriNetUnfolder]: 148/470 cut-off events. [2022-07-12 10:41:17,229 INFO L130 PetriNetUnfolder]: For 749/758 co-relation queries the response was YES. [2022-07-12 10:41:17,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1391 conditions, 470 events. 148/470 cut-off events. For 749/758 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2388 event pairs, 34 based on Foata normal form. 7/473 useless extension candidates. Maximal degree in co-relation 1366. Up to 131 conditions per place. [2022-07-12 10:41:17,233 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 30 changer transitions 8/146 dead transitions. [2022-07-12 10:41:17,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 901 flow [2022-07-12 10:41:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-12 10:41:17,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-12 10:41:17,235 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-12 10:41:17,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-12 10:41:17,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:17,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-12 10:41:17,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,239 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,240 INFO L186 Difference]: Start difference. First operand has 113 places, 106 transitions, 522 flow. Second operand 14 states and 796 transitions. [2022-07-12 10:41:17,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 901 flow [2022-07-12 10:41:17,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 146 transitions, 833 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-12 10:41:17,246 INFO L242 Difference]: Finished difference. Result has 116 places, 107 transitions, 540 flow [2022-07-12 10:41:17,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=540, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2022-07-12 10:41:17,248 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 39 predicate places. [2022-07-12 10:41:17,249 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 540 flow [2022-07-12 10:41:17,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:17,249 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] [2022-07-12 10:41:17,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:41:17,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:17,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash 338165169, now seen corresponding path program 6 times [2022-07-12 10:41:17,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:17,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584198624] [2022-07-12 10:41:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:17,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584198624] [2022-07-12 10:41:17,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584198624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:17,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:17,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 10:41:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076705993] [2022-07-12 10:41:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:17,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 10:41:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 10:41:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:41:17,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:17,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 540 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:17,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:17,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:17,681 INFO L129 PetriNetUnfolder]: 145/456 cut-off events. [2022-07-12 10:41:17,682 INFO L130 PetriNetUnfolder]: For 728/730 co-relation queries the response was YES. [2022-07-12 10:41:17,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 456 events. 145/456 cut-off events. For 728/730 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2339 event pairs, 29 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 1368. Up to 140 conditions per place. [2022-07-12 10:41:17,685 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 28 changer transitions 8/141 dead transitions. [2022-07-12 10:41:17,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 890 flow [2022-07-12 10:41:17,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-12 10:41:17,687 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-12 10:41:17,687 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-12 10:41:17,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-12 10:41:17,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:17,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-12 10:41:17,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,691 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,691 INFO L186 Difference]: Start difference. First operand has 116 places, 107 transitions, 540 flow. Second operand 14 states and 790 transitions. [2022-07-12 10:41:17,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 890 flow [2022-07-12 10:41:17,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 141 transitions, 816 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:17,695 INFO L242 Difference]: Finished difference. Result has 117 places, 105 transitions, 518 flow [2022-07-12 10:41:17,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=518, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2022-07-12 10:41:17,696 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2022-07-12 10:41:17,696 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 518 flow [2022-07-12 10:41:17,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,696 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:17,696 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] [2022-07-12 10:41:17,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:41:17,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:17,697 INFO L85 PathProgramCache]: Analyzing trace with hash -210038721, now seen corresponding path program 7 times [2022-07-12 10:41:17,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:17,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747392037] [2022-07-12 10:41:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:17,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:17,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747392037] [2022-07-12 10:41:17,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747392037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:17,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:17,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 10:41:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613155691] [2022-07-12 10:41:17,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:17,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 10:41:17,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:17,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 10:41:17,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:41:17,846 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:17,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 518 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:17,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:17,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:18,087 INFO L129 PetriNetUnfolder]: 166/469 cut-off events. [2022-07-12 10:41:18,088 INFO L130 PetriNetUnfolder]: For 853/853 co-relation queries the response was YES. [2022-07-12 10:41:18,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 469 events. 166/469 cut-off events. For 853/853 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2299 event pairs, 41 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 1497. Up to 141 conditions per place. [2022-07-12 10:41:18,091 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 37 changer transitions 8/147 dead transitions. [2022-07-12 10:41:18,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 147 transitions, 975 flow [2022-07-12 10:41:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-12 10:41:18,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-12 10:41:18,093 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-12 10:41:18,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-12 10:41:18,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:18,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-12 10:41:18,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,097 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,097 INFO L186 Difference]: Start difference. First operand has 117 places, 105 transitions, 518 flow. Second operand 14 states and 794 transitions. [2022-07-12 10:41:18,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 147 transitions, 975 flow [2022-07-12 10:41:18,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 879 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:18,101 INFO L242 Difference]: Finished difference. Result has 119 places, 116 transitions, 669 flow [2022-07-12 10:41:18,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=669, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2022-07-12 10:41:18,102 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-12 10:41:18,102 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 669 flow [2022-07-12 10:41:18,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:18,103 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] [2022-07-12 10:41:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:41:18,103 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1678747771, now seen corresponding path program 8 times [2022-07-12 10:41:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434261316] [2022-07-12 10:41:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:18,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434261316] [2022-07-12 10:41:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434261316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:18,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:18,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:18,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209386067] [2022-07-12 10:41:18,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:18,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:18,261 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:18,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 669 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:18,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:18,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:18,491 INFO L129 PetriNetUnfolder]: 185/525 cut-off events. [2022-07-12 10:41:18,492 INFO L130 PetriNetUnfolder]: For 1263/1267 co-relation queries the response was YES. [2022-07-12 10:41:18,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 525 events. 185/525 cut-off events. For 1263/1267 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2704 event pairs, 29 based on Foata normal form. 3/523 useless extension candidates. Maximal degree in co-relation 1789. Up to 154 conditions per place. [2022-07-12 10:41:18,496 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 7/156 dead transitions. [2022-07-12 10:41:18,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1142 flow [2022-07-12 10:41:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-12 10:41:18,498 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-12 10:41:18,498 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-12 10:41:18,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-12 10:41:18,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:18,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-12 10:41:18,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,502 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,502 INFO L186 Difference]: Start difference. First operand has 119 places, 116 transitions, 669 flow. Second operand 14 states and 793 transitions. [2022-07-12 10:41:18,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1142 flow [2022-07-12 10:41:18,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1075 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-07-12 10:41:18,522 INFO L242 Difference]: Finished difference. Result has 126 places, 125 transitions, 850 flow [2022-07-12 10:41:18,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=850, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2022-07-12 10:41:18,523 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2022-07-12 10:41:18,523 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 850 flow [2022-07-12 10:41:18,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,524 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:18,524 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] [2022-07-12 10:41:18,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:41:18,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:18,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1095483919, now seen corresponding path program 9 times [2022-07-12 10:41:18,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:18,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843203909] [2022-07-12 10:41:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:18,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:18,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843203909] [2022-07-12 10:41:18,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843203909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:18,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:18,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637191377] [2022-07-12 10:41:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:18,658 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:18,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 850 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:18,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:18,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:18,908 INFO L129 PetriNetUnfolder]: 184/522 cut-off events. [2022-07-12 10:41:18,908 INFO L130 PetriNetUnfolder]: For 1694/1698 co-relation queries the response was YES. [2022-07-12 10:41:18,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 522 events. 184/522 cut-off events. For 1694/1698 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2683 event pairs, 27 based on Foata normal form. 3/520 useless extension candidates. Maximal degree in co-relation 1903. Up to 153 conditions per place. [2022-07-12 10:41:18,913 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 44 changer transitions 7/157 dead transitions. [2022-07-12 10:41:18,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 157 transitions, 1247 flow [2022-07-12 10:41:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-12 10:41:18,915 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-12 10:41:18,915 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-12 10:41:18,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-12 10:41:18,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:18,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-12 10:41:18,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,918 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,918 INFO L186 Difference]: Start difference. First operand has 126 places, 125 transitions, 850 flow. Second operand 14 states and 793 transitions. [2022-07-12 10:41:18,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 157 transitions, 1247 flow [2022-07-12 10:41:18,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 157 transitions, 1163 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-12 10:41:18,925 INFO L242 Difference]: Finished difference. Result has 132 places, 127 transitions, 920 flow [2022-07-12 10:41:18,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2022-07-12 10:41:18,926 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-07-12 10:41:18,926 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 920 flow [2022-07-12 10:41:18,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:18,927 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] [2022-07-12 10:41:18,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:41:18,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2108680237, now seen corresponding path program 10 times [2022-07-12 10:41:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:18,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604147569] [2022-07-12 10:41:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:18,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:19,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604147569] [2022-07-12 10:41:19,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604147569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:19,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:19,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:19,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392058145] [2022-07-12 10:41:19,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:19,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:19,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:19,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:19,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:19,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:19,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:19,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:19,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:19,327 INFO L129 PetriNetUnfolder]: 180/503 cut-off events. [2022-07-12 10:41:19,327 INFO L130 PetriNetUnfolder]: For 2010/2010 co-relation queries the response was YES. [2022-07-12 10:41:19,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 503 events. 180/503 cut-off events. For 2010/2010 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2592 event pairs, 44 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 1905. Up to 143 conditions per place. [2022-07-12 10:41:19,331 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 44 changer transitions 7/160 dead transitions. [2022-07-12 10:41:19,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 1297 flow [2022-07-12 10:41:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-07-12 10:41:19,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-07-12 10:41:19,333 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-07-12 10:41:19,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-07-12 10:41:19,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:19,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-07-12 10:41:19,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,337 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,337 INFO L186 Difference]: Start difference. First operand has 132 places, 127 transitions, 920 flow. Second operand 14 states and 795 transitions. [2022-07-12 10:41:19,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 1297 flow [2022-07-12 10:41:19,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 160 transitions, 1201 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-07-12 10:41:19,344 INFO L242 Difference]: Finished difference. Result has 136 places, 128 transitions, 938 flow [2022-07-12 10:41:19,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=938, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2022-07-12 10:41:19,345 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-12 10:41:19,345 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 938 flow [2022-07-12 10:41:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,346 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:19,346 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] [2022-07-12 10:41:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:41:19,346 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2083365095, now seen corresponding path program 11 times [2022-07-12 10:41:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172351469] [2022-07-12 10:41:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:19,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:19,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172351469] [2022-07-12 10:41:19,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172351469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:19,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:19,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107610960] [2022-07-12 10:41:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:19,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:19,474 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:19,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 938 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:19,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:19,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:19,726 INFO L129 PetriNetUnfolder]: 180/498 cut-off events. [2022-07-12 10:41:19,726 INFO L130 PetriNetUnfolder]: For 1977/1979 co-relation queries the response was YES. [2022-07-12 10:41:19,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 498 events. 180/498 cut-off events. For 1977/1979 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2596 event pairs, 37 based on Foata normal form. 1/490 useless extension candidates. Maximal degree in co-relation 1909. Up to 147 conditions per place. [2022-07-12 10:41:19,730 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 9/158 dead transitions. [2022-07-12 10:41:19,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 158 transitions, 1295 flow [2022-07-12 10:41:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-12 10:41:19,732 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-12 10:41:19,732 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-12 10:41:19,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-12 10:41:19,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:19,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-12 10:41:19,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,735 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,735 INFO L186 Difference]: Start difference. First operand has 136 places, 128 transitions, 938 flow. Second operand 14 states and 793 transitions. [2022-07-12 10:41:19,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 158 transitions, 1295 flow [2022-07-12 10:41:19,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 158 transitions, 1193 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:19,743 INFO L242 Difference]: Finished difference. Result has 137 places, 126 transitions, 905 flow [2022-07-12 10:41:19,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=905, PETRI_PLACES=137, PETRI_TRANSITIONS=126} [2022-07-12 10:41:19,743 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-12 10:41:19,743 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 126 transitions, 905 flow [2022-07-12 10:41:19,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,744 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:19,744 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] [2022-07-12 10:41:19,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:41:19,744 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash 536902577, now seen corresponding path program 12 times [2022-07-12 10:41:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:19,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851647578] [2022-07-12 10:41:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:19,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:19,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851647578] [2022-07-12 10:41:19,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851647578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:19,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:19,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837485725] [2022-07-12 10:41:19,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:19,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:19,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:19,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:19,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:19,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 126 transitions, 905 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:19,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:19,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:19,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:20,136 INFO L129 PetriNetUnfolder]: 185/534 cut-off events. [2022-07-12 10:41:20,137 INFO L130 PetriNetUnfolder]: For 2069/2069 co-relation queries the response was YES. [2022-07-12 10:41:20,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 534 events. 185/534 cut-off events. For 2069/2069 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2892 event pairs, 41 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 1965. Up to 147 conditions per place. [2022-07-12 10:41:20,140 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 44 changer transitions 8/162 dead transitions. [2022-07-12 10:41:20,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 162 transitions, 1303 flow [2022-07-12 10:41:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2022-07-12 10:41:20,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2022-07-12 10:41:20,142 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2022-07-12 10:41:20,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2022-07-12 10:41:20,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:20,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2022-07-12 10:41:20,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,145 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,145 INFO L186 Difference]: Start difference. First operand has 137 places, 126 transitions, 905 flow. Second operand 14 states and 797 transitions. [2022-07-12 10:41:20,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 162 transitions, 1303 flow [2022-07-12 10:41:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 162 transitions, 1201 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:20,151 INFO L242 Difference]: Finished difference. Result has 137 places, 128 transitions, 929 flow [2022-07-12 10:41:20,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=929, PETRI_PLACES=137, PETRI_TRANSITIONS=128} [2022-07-12 10:41:20,152 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-12 10:41:20,152 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 128 transitions, 929 flow [2022-07-12 10:41:20,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:20,153 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] [2022-07-12 10:41:20,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:41:20,153 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1478478085, now seen corresponding path program 13 times [2022-07-12 10:41:20,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:20,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560691517] [2022-07-12 10:41:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:20,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:20,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560691517] [2022-07-12 10:41:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560691517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:20,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:20,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:20,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038854885] [2022-07-12 10:41:20,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:20,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:20,280 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:20,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 128 transitions, 929 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:20,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:20,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:20,528 INFO L129 PetriNetUnfolder]: 186/555 cut-off events. [2022-07-12 10:41:20,528 INFO L130 PetriNetUnfolder]: For 2147/2151 co-relation queries the response was YES. [2022-07-12 10:41:20,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 555 events. 186/555 cut-off events. For 2147/2151 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3037 event pairs, 30 based on Foata normal form. 3/552 useless extension candidates. Maximal degree in co-relation 2013. Up to 163 conditions per place. [2022-07-12 10:41:20,532 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 40 changer transitions 9/157 dead transitions. [2022-07-12 10:41:20,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 157 transitions, 1284 flow [2022-07-12 10:41:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-12 10:41:20,534 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-12 10:41:20,534 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-12 10:41:20,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-12 10:41:20,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:20,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-12 10:41:20,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,537 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,537 INFO L186 Difference]: Start difference. First operand has 137 places, 128 transitions, 929 flow. Second operand 14 states and 792 transitions. [2022-07-12 10:41:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 157 transitions, 1284 flow [2022-07-12 10:41:20,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 157 transitions, 1182 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:20,544 INFO L242 Difference]: Finished difference. Result has 137 places, 125 transitions, 882 flow [2022-07-12 10:41:20,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=882, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2022-07-12 10:41:20,545 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-12 10:41:20,545 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 882 flow [2022-07-12 10:41:20,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,545 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:20,546 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] [2022-07-12 10:41:20,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:41:20,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1731083455, now seen corresponding path program 14 times [2022-07-12 10:41:20,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:20,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793476202] [2022-07-12 10:41:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:20,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:20,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793476202] [2022-07-12 10:41:20,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793476202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:20,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:20,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:20,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169315913] [2022-07-12 10:41:20,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:20,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:20,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:20,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:20,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 882 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:20,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:20,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:20,956 INFO L129 PetriNetUnfolder]: 181/515 cut-off events. [2022-07-12 10:41:20,956 INFO L130 PetriNetUnfolder]: For 2031/2033 co-relation queries the response was YES. [2022-07-12 10:41:20,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 515 events. 181/515 cut-off events. For 2031/2033 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2700 event pairs, 46 based on Foata normal form. 1/504 useless extension candidates. Maximal degree in co-relation 1920. Up to 154 conditions per place. [2022-07-12 10:41:20,960 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 8/157 dead transitions. [2022-07-12 10:41:20,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 157 transitions, 1278 flow [2022-07-12 10:41:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-12 10:41:20,962 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-12 10:41:20,962 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-12 10:41:20,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-12 10:41:20,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:20,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-12 10:41:20,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,965 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,965 INFO L186 Difference]: Start difference. First operand has 137 places, 125 transitions, 882 flow. Second operand 14 states and 793 transitions. [2022-07-12 10:41:20,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 157 transitions, 1278 flow [2022-07-12 10:41:20,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 157 transitions, 1180 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-12 10:41:20,972 INFO L242 Difference]: Finished difference. Result has 139 places, 127 transitions, 926 flow [2022-07-12 10:41:20,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=926, PETRI_PLACES=139, PETRI_TRANSITIONS=127} [2022-07-12 10:41:20,973 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 62 predicate places. [2022-07-12 10:41:20,973 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 926 flow [2022-07-12 10:41:20,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:20,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:20,973 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] [2022-07-12 10:41:20,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:41:20,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524753, now seen corresponding path program 15 times [2022-07-12 10:41:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885581586] [2022-07-12 10:41:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:20,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885581586] [2022-07-12 10:41:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885581586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:21,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:21,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080793439] [2022-07-12 10:41:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:21,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:21,134 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:21,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 127 transitions, 926 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:21,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:21,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:21,359 INFO L129 PetriNetUnfolder]: 179/508 cut-off events. [2022-07-12 10:41:21,360 INFO L130 PetriNetUnfolder]: For 2057/2059 co-relation queries the response was YES. [2022-07-12 10:41:21,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 508 events. 179/508 cut-off events. For 2057/2059 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2683 event pairs, 50 based on Foata normal form. 1/497 useless extension candidates. Maximal degree in co-relation 1937. Up to 153 conditions per place. [2022-07-12 10:41:21,364 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2022-07-12 10:41:21,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 157 transitions, 1312 flow [2022-07-12 10:41:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-07-12 10:41:21,365 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-07-12 10:41:21,365 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-07-12 10:41:21,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-07-12 10:41:21,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:21,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-07-12 10:41:21,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,368 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,368 INFO L186 Difference]: Start difference. First operand has 139 places, 127 transitions, 926 flow. Second operand 14 states and 788 transitions. [2022-07-12 10:41:21,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 157 transitions, 1312 flow [2022-07-12 10:41:21,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1235 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-07-12 10:41:21,375 INFO L242 Difference]: Finished difference. Result has 142 places, 125 transitions, 911 flow [2022-07-12 10:41:21,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=911, PETRI_PLACES=142, PETRI_TRANSITIONS=125} [2022-07-12 10:41:21,376 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-12 10:41:21,376 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 125 transitions, 911 flow [2022-07-12 10:41:21,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:21,376 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] [2022-07-12 10:41:21,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:41:21,377 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash 967734761, now seen corresponding path program 16 times [2022-07-12 10:41:21,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:21,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484605544] [2022-07-12 10:41:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:21,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:21,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484605544] [2022-07-12 10:41:21,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484605544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:21,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:21,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:21,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782313745] [2022-07-12 10:41:21,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:21,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:21,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:21,498 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:21,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 125 transitions, 911 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:21,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:21,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:21,732 INFO L129 PetriNetUnfolder]: 183/550 cut-off events. [2022-07-12 10:41:21,733 INFO L130 PetriNetUnfolder]: For 2125/2129 co-relation queries the response was YES. [2022-07-12 10:41:21,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 550 events. 183/550 cut-off events. For 2125/2129 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2994 event pairs, 42 based on Foata normal form. 3/544 useless extension candidates. Maximal degree in co-relation 2011. Up to 159 conditions per place. [2022-07-12 10:41:21,736 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2022-07-12 10:41:21,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 159 transitions, 1325 flow [2022-07-12 10:41:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-12 10:41:21,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-12 10:41:21,738 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-12 10:41:21,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-12 10:41:21,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:21,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-12 10:41:21,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,741 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,741 INFO L186 Difference]: Start difference. First operand has 142 places, 125 transitions, 911 flow. Second operand 14 states and 790 transitions. [2022-07-12 10:41:21,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 159 transitions, 1325 flow [2022-07-12 10:41:21,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 159 transitions, 1235 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:21,748 INFO L242 Difference]: Finished difference. Result has 142 places, 126 transitions, 927 flow [2022-07-12 10:41:21,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=927, PETRI_PLACES=142, PETRI_TRANSITIONS=126} [2022-07-12 10:41:21,749 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-12 10:41:21,749 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 126 transitions, 927 flow [2022-07-12 10:41:21,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,750 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:21,750 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] [2022-07-12 10:41:21,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:41:21,750 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 17 times [2022-07-12 10:41:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:21,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853403116] [2022-07-12 10:41:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:21,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853403116] [2022-07-12 10:41:21,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853403116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:21,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:21,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:21,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733539364] [2022-07-12 10:41:21,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:21,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:21,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:21,861 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:21,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 126 transitions, 927 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:21,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:21,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:22,099 INFO L129 PetriNetUnfolder]: 182/549 cut-off events. [2022-07-12 10:41:22,099 INFO L130 PetriNetUnfolder]: For 2195/2199 co-relation queries the response was YES. [2022-07-12 10:41:22,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 549 events. 182/549 cut-off events. For 2195/2199 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2995 event pairs, 36 based on Foata normal form. 3/543 useless extension candidates. Maximal degree in co-relation 2023. Up to 163 conditions per place. [2022-07-12 10:41:22,103 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 38 changer transitions 8/154 dead transitions. [2022-07-12 10:41:22,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1287 flow [2022-07-12 10:41:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-07-12 10:41:22,105 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-07-12 10:41:22,105 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-07-12 10:41:22,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-07-12 10:41:22,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:22,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-07-12 10:41:22,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,107 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,107 INFO L186 Difference]: Start difference. First operand has 142 places, 126 transitions, 927 flow. Second operand 14 states and 791 transitions. [2022-07-12 10:41:22,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1287 flow [2022-07-12 10:41:22,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 154 transitions, 1191 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:22,116 INFO L242 Difference]: Finished difference. Result has 143 places, 124 transitions, 895 flow [2022-07-12 10:41:22,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=895, PETRI_PLACES=143, PETRI_TRANSITIONS=124} [2022-07-12 10:41:22,116 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-12 10:41:22,116 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 124 transitions, 895 flow [2022-07-12 10:41:22,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,117 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:22,117 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] [2022-07-12 10:41:22,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:41:22,117 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash 386002791, now seen corresponding path program 18 times [2022-07-12 10:41:22,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:22,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905904064] [2022-07-12 10:41:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:22,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:22,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:22,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905904064] [2022-07-12 10:41:22,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905904064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:22,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:22,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:22,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746543035] [2022-07-12 10:41:22,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:22,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:22,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:22,244 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:22,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 124 transitions, 895 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:22,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:22,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:22,536 INFO L129 PetriNetUnfolder]: 177/518 cut-off events. [2022-07-12 10:41:22,537 INFO L130 PetriNetUnfolder]: For 2182/2184 co-relation queries the response was YES. [2022-07-12 10:41:22,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 518 events. 177/518 cut-off events. For 2182/2184 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2810 event pairs, 45 based on Foata normal form. 1/507 useless extension candidates. Maximal degree in co-relation 1957. Up to 151 conditions per place. [2022-07-12 10:41:22,541 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 40 changer transitions 7/157 dead transitions. [2022-07-12 10:41:22,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1294 flow [2022-07-12 10:41:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-12 10:41:22,542 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-12 10:41:22,542 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-12 10:41:22,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-12 10:41:22,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:22,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-12 10:41:22,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,545 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,545 INFO L186 Difference]: Start difference. First operand has 143 places, 124 transitions, 895 flow. Second operand 14 states and 794 transitions. [2022-07-12 10:41:22,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1294 flow [2022-07-12 10:41:22,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1202 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:22,560 INFO L242 Difference]: Finished difference. Result has 143 places, 126 transitions, 924 flow [2022-07-12 10:41:22,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=924, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2022-07-12 10:41:22,561 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-12 10:41:22,561 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 924 flow [2022-07-12 10:41:22,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,562 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:22,562 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] [2022-07-12 10:41:22,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 10:41:22,562 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:22,562 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 19 times [2022-07-12 10:41:22,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578087824] [2022-07-12 10:41:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:22,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:22,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:22,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578087824] [2022-07-12 10:41:22,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578087824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:22,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:22,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:22,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810173257] [2022-07-12 10:41:22,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:22,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:22,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:22,712 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:22,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 924 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:22,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:22,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:22,979 INFO L129 PetriNetUnfolder]: 183/565 cut-off events. [2022-07-12 10:41:22,980 INFO L130 PetriNetUnfolder]: For 2365/2369 co-relation queries the response was YES. [2022-07-12 10:41:22,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 565 events. 183/565 cut-off events. For 2365/2369 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3192 event pairs, 39 based on Foata normal form. 3/560 useless extension candidates. Maximal degree in co-relation 2060. Up to 159 conditions per place. [2022-07-12 10:41:22,984 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 38 changer transitions 8/160 dead transitions. [2022-07-12 10:41:22,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 160 transitions, 1329 flow [2022-07-12 10:41:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-12 10:41:22,985 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-12 10:41:22,986 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-12 10:41:22,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-12 10:41:22,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:22,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-12 10:41:22,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,988 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,988 INFO L186 Difference]: Start difference. First operand has 143 places, 126 transitions, 924 flow. Second operand 14 states and 796 transitions. [2022-07-12 10:41:22,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 160 transitions, 1329 flow [2022-07-12 10:41:22,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 160 transitions, 1233 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:22,997 INFO L242 Difference]: Finished difference. Result has 145 places, 127 transitions, 932 flow [2022-07-12 10:41:22,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=932, PETRI_PLACES=145, PETRI_TRANSITIONS=127} [2022-07-12 10:41:22,998 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-12 10:41:22,998 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 127 transitions, 932 flow [2022-07-12 10:41:22,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:22,998 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] [2022-07-12 10:41:22,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:41:22,998 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1585546923, now seen corresponding path program 20 times [2022-07-12 10:41:22,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:22,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975338526] [2022-07-12 10:41:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:22,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:23,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975338526] [2022-07-12 10:41:23,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975338526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:23,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:23,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 10:41:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827224058] [2022-07-12 10:41:23,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:23,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:41:23,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:23,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:41:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:41:23,124 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:41:23,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 127 transitions, 932 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:23,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:41:23,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:23,368 INFO L129 PetriNetUnfolder]: 180/558 cut-off events. [2022-07-12 10:41:23,369 INFO L130 PetriNetUnfolder]: For 2427/2431 co-relation queries the response was YES. [2022-07-12 10:41:23,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 558 events. 180/558 cut-off events. For 2427/2431 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3103 event pairs, 39 based on Foata normal form. 3/553 useless extension candidates. Maximal degree in co-relation 2058. Up to 167 conditions per place. [2022-07-12 10:41:23,373 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 36 changer transitions 8/154 dead transitions. [2022-07-12 10:41:23,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 1291 flow [2022-07-12 10:41:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:41:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:41:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-12 10:41:23,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-12 10:41:23,374 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-12 10:41:23,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-12 10:41:23,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:23,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-12 10:41:23,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,376 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,377 INFO L186 Difference]: Start difference. First operand has 145 places, 127 transitions, 932 flow. Second operand 14 states and 790 transitions. [2022-07-12 10:41:23,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 1291 flow [2022-07-12 10:41:23,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1197 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:23,384 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 885 flow [2022-07-12 10:41:23,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=885, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2022-07-12 10:41:23,384 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-12 10:41:23,385 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 885 flow [2022-07-12 10:41:23,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:23,385 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] [2022-07-12 10:41:23,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:41:23,385 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash -859363161, now seen corresponding path program 1 times [2022-07-12 10:41:23,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:23,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272417103] [2022-07-12 10:41:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:23,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:23,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272417103] [2022-07-12 10:41:23,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272417103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069403419] [2022-07-12 10:41:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:23,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:23,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:41:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:41:23,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:23,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:23,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069403419] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:23,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:41:23,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-07-12 10:41:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689013453] [2022-07-12 10:41:23,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:23,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:41:23,531 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:23,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 885 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:23,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:23,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:23,620 INFO L129 PetriNetUnfolder]: 187/539 cut-off events. [2022-07-12 10:41:23,620 INFO L130 PetriNetUnfolder]: For 2641/2643 co-relation queries the response was YES. [2022-07-12 10:41:23,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 539 events. 187/539 cut-off events. For 2641/2643 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2886 event pairs, 14 based on Foata normal form. 8/541 useless extension candidates. Maximal degree in co-relation 2047. Up to 139 conditions per place. [2022-07-12 10:41:23,625 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-07-12 10:41:23,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 176 transitions, 1659 flow [2022-07-12 10:41:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:41:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:41:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-12 10:41:23,628 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-12 10:41:23,628 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-12 10:41:23,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-12 10:41:23,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:23,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-12 10:41:23,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,631 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,632 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 885 flow. Second operand 7 states and 483 transitions. [2022-07-12 10:41:23,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 176 transitions, 1659 flow [2022-07-12 10:41:23,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 176 transitions, 1537 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-07-12 10:41:23,640 INFO L242 Difference]: Finished difference. Result has 136 places, 139 transitions, 1049 flow [2022-07-12 10:41:23,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1049, PETRI_PLACES=136, PETRI_TRANSITIONS=139} [2022-07-12 10:41:23,641 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-12 10:41:23,641 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 1049 flow [2022-07-12 10:41:23,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,641 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:23,641 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] [2022-07-12 10:41:23,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:23,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 10:41:23,860 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1370591913, now seen corresponding path program 2 times [2022-07-12 10:41:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:23,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785879397] [2022-07-12 10:41:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:23,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:23,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:23,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785879397] [2022-07-12 10:41:23,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785879397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:23,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:23,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:23,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568922314] [2022-07-12 10:41:23,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:23,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:23,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:23,884 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:23,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 1049 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:23,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:23,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:24,004 INFO L129 PetriNetUnfolder]: 219/656 cut-off events. [2022-07-12 10:41:24,005 INFO L130 PetriNetUnfolder]: For 3315/3326 co-relation queries the response was YES. [2022-07-12 10:41:24,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 656 events. 219/656 cut-off events. For 3315/3326 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3838 event pairs, 53 based on Foata normal form. 4/651 useless extension candidates. Maximal degree in co-relation 2358. Up to 144 conditions per place. [2022-07-12 10:41:24,010 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-07-12 10:41:24,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 1835 flow [2022-07-12 10:41:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:41:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:41:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-07-12 10:41:24,011 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-07-12 10:41:24,011 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-07-12 10:41:24,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-07-12 10:41:24,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:24,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-07-12 10:41:24,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,013 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,013 INFO L186 Difference]: Start difference. First operand has 136 places, 139 transitions, 1049 flow. Second operand 8 states and 561 transitions. [2022-07-12 10:41:24,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 1835 flow [2022-07-12 10:41:24,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1789 flow, removed 23 selfloop flow, removed 0 redundant places. [2022-07-12 10:41:24,024 INFO L242 Difference]: Finished difference. Result has 149 places, 156 transitions, 1411 flow [2022-07-12 10:41:24,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-07-12 10:41:24,024 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-07-12 10:41:24,024 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1411 flow [2022-07-12 10:41:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,025 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:24,025 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] [2022-07-12 10:41:24,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 10:41:24,025 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash -212945927, now seen corresponding path program 1 times [2022-07-12 10:41:24,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:24,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978904530] [2022-07-12 10:41:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:24,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:24,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:24,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978904530] [2022-07-12 10:41:24,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978904530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:24,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:24,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:24,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086468970] [2022-07-12 10:41:24,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:24,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:24,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1411 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:24,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:24,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:24,152 INFO L129 PetriNetUnfolder]: 208/637 cut-off events. [2022-07-12 10:41:24,152 INFO L130 PetriNetUnfolder]: For 4280/4291 co-relation queries the response was YES. [2022-07-12 10:41:24,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 637 events. 208/637 cut-off events. For 4280/4291 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3705 event pairs, 47 based on Foata normal form. 8/637 useless extension candidates. Maximal degree in co-relation 2434. Up to 155 conditions per place. [2022-07-12 10:41:24,157 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 102 selfloop transitions, 30 changer transitions 5/186 dead transitions. [2022-07-12 10:41:24,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 186 transitions, 1898 flow [2022-07-12 10:41:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:41:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:41:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-07-12 10:41:24,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-07-12 10:41:24,173 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-07-12 10:41:24,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-07-12 10:41:24,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:24,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-07-12 10:41:24,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,175 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,175 INFO L186 Difference]: Start difference. First operand has 149 places, 156 transitions, 1411 flow. Second operand 7 states and 486 transitions. [2022-07-12 10:41:24,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 186 transitions, 1898 flow [2022-07-12 10:41:24,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 186 transitions, 1854 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-12 10:41:24,186 INFO L242 Difference]: Finished difference. Result has 153 places, 155 transitions, 1421 flow [2022-07-12 10:41:24,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1421, PETRI_PLACES=153, PETRI_TRANSITIONS=155} [2022-07-12 10:41:24,187 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2022-07-12 10:41:24,187 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 155 transitions, 1421 flow [2022-07-12 10:41:24,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:24,188 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] [2022-07-12 10:41:24,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 10:41:24,188 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:24,188 INFO L85 PathProgramCache]: Analyzing trace with hash -599915105, now seen corresponding path program 2 times [2022-07-12 10:41:24,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:24,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725339955] [2022-07-12 10:41:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:24,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:24,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:24,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725339955] [2022-07-12 10:41:24,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725339955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:24,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:24,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:24,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274971082] [2022-07-12 10:41:24,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:24,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:24,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:24,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:24,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 155 transitions, 1421 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:24,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:24,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:24,335 INFO L129 PetriNetUnfolder]: 228/704 cut-off events. [2022-07-12 10:41:24,335 INFO L130 PetriNetUnfolder]: For 5033/5043 co-relation queries the response was YES. [2022-07-12 10:41:24,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 704 events. 228/704 cut-off events. For 5033/5043 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4219 event pairs, 54 based on Foata normal form. 11/708 useless extension candidates. Maximal degree in co-relation 2641. Up to 172 conditions per place. [2022-07-12 10:41:24,341 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 45 changer transitions 2/224 dead transitions. [2022-07-12 10:41:24,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 224 transitions, 2406 flow [2022-07-12 10:41:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:41:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:41:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2022-07-12 10:41:24,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2022-07-12 10:41:24,342 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2022-07-12 10:41:24,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2022-07-12 10:41:24,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:24,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2022-07-12 10:41:24,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,344 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,345 INFO L186 Difference]: Start difference. First operand has 153 places, 155 transitions, 1421 flow. Second operand 8 states and 566 transitions. [2022-07-12 10:41:24,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 224 transitions, 2406 flow [2022-07-12 10:41:24,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 224 transitions, 2316 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-12 10:41:24,359 INFO L242 Difference]: Finished difference. Result has 157 places, 170 transitions, 1698 flow [2022-07-12 10:41:24,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1698, PETRI_PLACES=157, PETRI_TRANSITIONS=170} [2022-07-12 10:41:24,360 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 80 predicate places. [2022-07-12 10:41:24,360 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 170 transitions, 1698 flow [2022-07-12 10:41:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:24,360 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] [2022-07-12 10:41:24,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 10:41:24,361 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1443454513, now seen corresponding path program 3 times [2022-07-12 10:41:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162375613] [2022-07-12 10:41:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:24,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:24,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:24,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162375613] [2022-07-12 10:41:24,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162375613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:24,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:24,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:24,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421109997] [2022-07-12 10:41:24,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:24,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:24,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:24,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:24,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:24,393 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:24,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 170 transitions, 1698 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:24,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:24,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:24,528 INFO L129 PetriNetUnfolder]: 261/781 cut-off events. [2022-07-12 10:41:24,528 INFO L130 PetriNetUnfolder]: For 5858/5858 co-relation queries the response was YES. [2022-07-12 10:41:24,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 781 events. 261/781 cut-off events. For 5858/5858 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4724 event pairs, 38 based on Foata normal form. 9/784 useless extension candidates. Maximal degree in co-relation 3285. Up to 129 conditions per place. [2022-07-12 10:41:24,534 INFO L132 encePairwiseOnDemand]: 77/87 looper letters, 100 selfloop transitions, 98 changer transitions 4/251 dead transitions. [2022-07-12 10:41:24,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 251 transitions, 2992 flow [2022-07-12 10:41:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:41:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:41:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-07-12 10:41:24,536 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2022-07-12 10:41:24,536 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-07-12 10:41:24,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-07-12 10:41:24,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:24,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-07-12 10:41:24,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,538 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,538 INFO L186 Difference]: Start difference. First operand has 157 places, 170 transitions, 1698 flow. Second operand 9 states and 617 transitions. [2022-07-12 10:41:24,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 251 transitions, 2992 flow [2022-07-12 10:41:24,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 2924 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-12 10:41:24,555 INFO L242 Difference]: Finished difference. Result has 170 places, 212 transitions, 2574 flow [2022-07-12 10:41:24,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2574, PETRI_PLACES=170, PETRI_TRANSITIONS=212} [2022-07-12 10:41:24,555 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-12 10:41:24,555 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 212 transitions, 2574 flow [2022-07-12 10:41:24,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,556 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:24,556 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] [2022-07-12 10:41:24,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 10:41:24,556 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1098800831, now seen corresponding path program 3 times [2022-07-12 10:41:24,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:24,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83214453] [2022-07-12 10:41:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:24,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:24,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:24,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83214453] [2022-07-12 10:41:24,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83214453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:24,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710026577] [2022-07-12 10:41:24,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:41:24,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:24,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:24,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:41:24,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:41:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:41:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:24,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:24,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710026577] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:24,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:41:24,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-12 10:41:24,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879756281] [2022-07-12 10:41:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:24,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:24,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:41:24,669 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:24,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 212 transitions, 2574 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:24,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:24,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:24,820 INFO L129 PetriNetUnfolder]: 280/916 cut-off events. [2022-07-12 10:41:24,820 INFO L130 PetriNetUnfolder]: For 8432/8444 co-relation queries the response was YES. [2022-07-12 10:41:24,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4124 conditions, 916 events. 280/916 cut-off events. For 8432/8444 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5987 event pairs, 49 based on Foata normal form. 12/917 useless extension candidates. Maximal degree in co-relation 3958. Up to 181 conditions per place. [2022-07-12 10:41:24,833 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 117 selfloop transitions, 99 changer transitions 2/267 dead transitions. [2022-07-12 10:41:24,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 3605 flow [2022-07-12 10:41:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:41:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:41:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2022-07-12 10:41:24,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8199233716475096 [2022-07-12 10:41:24,834 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2022-07-12 10:41:24,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2022-07-12 10:41:24,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:24,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2022-07-12 10:41:24,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.33333333333333) internal successors, (428), 6 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,836 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,836 INFO L186 Difference]: Start difference. First operand has 170 places, 212 transitions, 2574 flow. Second operand 6 states and 428 transitions. [2022-07-12 10:41:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 3605 flow [2022-07-12 10:41:24,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 267 transitions, 3491 flow, removed 45 selfloop flow, removed 3 redundant places. [2022-07-12 10:41:24,857 INFO L242 Difference]: Finished difference. Result has 177 places, 229 transitions, 3140 flow [2022-07-12 10:41:24,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3140, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2022-07-12 10:41:24,859 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 100 predicate places. [2022-07-12 10:41:24,859 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 3140 flow [2022-07-12 10:41:24,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:24,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:24,859 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] [2022-07-12 10:41:24,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:25,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 10:41:25,066 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1249889045, now seen corresponding path program 4 times [2022-07-12 10:41:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:25,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550688494] [2022-07-12 10:41:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:25,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:25,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550688494] [2022-07-12 10:41:25,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550688494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:25,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:25,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203655021] [2022-07-12 10:41:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:25,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:25,089 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:25,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 3140 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:25,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:25,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:25,233 INFO L129 PetriNetUnfolder]: 265/851 cut-off events. [2022-07-12 10:41:25,234 INFO L130 PetriNetUnfolder]: For 9579/9608 co-relation queries the response was YES. [2022-07-12 10:41:25,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 851 events. 265/851 cut-off events. For 9579/9608 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5350 event pairs, 55 based on Foata normal form. 5/847 useless extension candidates. Maximal degree in co-relation 4067. Up to 224 conditions per place. [2022-07-12 10:41:25,240 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 150 selfloop transitions, 59 changer transitions 5/263 dead transitions. [2022-07-12 10:41:25,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 263 transitions, 3808 flow [2022-07-12 10:41:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:41:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:41:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2022-07-12 10:41:25,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-07-12 10:41:25,242 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2022-07-12 10:41:25,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2022-07-12 10:41:25,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:25,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2022-07-12 10:41:25,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,244 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,244 INFO L186 Difference]: Start difference. First operand has 177 places, 229 transitions, 3140 flow. Second operand 8 states and 554 transitions. [2022-07-12 10:41:25,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 263 transitions, 3808 flow [2022-07-12 10:41:25,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 263 transitions, 3727 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-12 10:41:25,290 INFO L242 Difference]: Finished difference. Result has 181 places, 231 transitions, 3280 flow [2022-07-12 10:41:25,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2022-07-12 10:41:25,292 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2022-07-12 10:41:25,292 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 3280 flow [2022-07-12 10:41:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,292 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:25,292 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] [2022-07-12 10:41:25,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 10:41:25,293 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:25,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1263025475, now seen corresponding path program 5 times [2022-07-12 10:41:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:25,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101436286] [2022-07-12 10:41:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:25,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101436286] [2022-07-12 10:41:25,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101436286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:25,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:25,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:25,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378515956] [2022-07-12 10:41:25,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:25,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:25,319 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:25,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 3280 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:25,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:25,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:25,488 INFO L129 PetriNetUnfolder]: 246/770 cut-off events. [2022-07-12 10:41:25,488 INFO L130 PetriNetUnfolder]: For 9863/9881 co-relation queries the response was YES. [2022-07-12 10:41:25,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 770 events. 246/770 cut-off events. For 9863/9881 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4618 event pairs, 48 based on Foata normal form. 8/769 useless extension candidates. Maximal degree in co-relation 3854. Up to 190 conditions per place. [2022-07-12 10:41:25,493 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2022-07-12 10:41:25,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 261 transitions, 3873 flow [2022-07-12 10:41:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:41:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:41:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-07-12 10:41:25,494 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-12 10:41:25,494 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-07-12 10:41:25,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-07-12 10:41:25,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:25,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-07-12 10:41:25,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,496 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,496 INFO L186 Difference]: Start difference. First operand has 181 places, 231 transitions, 3280 flow. Second operand 8 states and 568 transitions. [2022-07-12 10:41:25,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 261 transitions, 3873 flow [2022-07-12 10:41:25,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3741 flow, removed 16 selfloop flow, removed 10 redundant places. [2022-07-12 10:41:25,522 INFO L242 Difference]: Finished difference. Result has 176 places, 224 transitions, 3209 flow [2022-07-12 10:41:25,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3209, PETRI_PLACES=176, PETRI_TRANSITIONS=224} [2022-07-12 10:41:25,526 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2022-07-12 10:41:25,526 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 224 transitions, 3209 flow [2022-07-12 10:41:25,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:25,526 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] [2022-07-12 10:41:25,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 10:41:25,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1192658001, now seen corresponding path program 4 times [2022-07-12 10:41:25,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:25,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172213080] [2022-07-12 10:41:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172213080] [2022-07-12 10:41:25,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172213080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696749166] [2022-07-12 10:41:25,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:41:25,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:25,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:25,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:41:25,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:41:25,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:41:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:25,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696749166] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:25,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:41:25,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-12 10:41:25,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114888513] [2022-07-12 10:41:25,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:41:25,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:25,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 224 transitions, 3209 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:25,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:25,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:25,762 INFO L129 PetriNetUnfolder]: 230/716 cut-off events. [2022-07-12 10:41:25,763 INFO L130 PetriNetUnfolder]: For 9860/9860 co-relation queries the response was YES. [2022-07-12 10:41:25,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3724 conditions, 716 events. 230/716 cut-off events. For 9860/9860 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4115 event pairs, 48 based on Foata normal form. 8/719 useless extension candidates. Maximal degree in co-relation 3508. Up to 229 conditions per place. [2022-07-12 10:41:25,768 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 132 selfloop transitions, 67 changer transitions 0/248 dead transitions. [2022-07-12 10:41:25,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 248 transitions, 3755 flow [2022-07-12 10:41:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:41:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:41:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-07-12 10:41:25,769 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-12 10:41:25,769 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-07-12 10:41:25,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-07-12 10:41:25,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:25,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-07-12 10:41:25,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,770 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,770 INFO L186 Difference]: Start difference. First operand has 176 places, 224 transitions, 3209 flow. Second operand 6 states and 426 transitions. [2022-07-12 10:41:25,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 248 transitions, 3755 flow [2022-07-12 10:41:25,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 248 transitions, 3718 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-12 10:41:25,797 INFO L242 Difference]: Finished difference. Result has 182 places, 222 transitions, 3327 flow [2022-07-12 10:41:25,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3327, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2022-07-12 10:41:25,799 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-12 10:41:25,799 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 3327 flow [2022-07-12 10:41:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:25,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:25,799 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] [2022-07-12 10:41:25,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:26,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 10:41:26,032 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:26,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash -736852561, now seen corresponding path program 5 times [2022-07-12 10:41:26,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:26,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020964579] [2022-07-12 10:41:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:26,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020964579] [2022-07-12 10:41:26,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020964579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:26,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:26,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229723481] [2022-07-12 10:41:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:26,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:26,066 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:26,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 3327 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:26,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:26,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:26,208 INFO L129 PetriNetUnfolder]: 225/705 cut-off events. [2022-07-12 10:41:26,208 INFO L130 PetriNetUnfolder]: For 10662/10664 co-relation queries the response was YES. [2022-07-12 10:41:26,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3804 conditions, 705 events. 225/705 cut-off events. For 10662/10664 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4045 event pairs, 60 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 3591. Up to 195 conditions per place. [2022-07-12 10:41:26,214 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2022-07-12 10:41:26,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 238 transitions, 3750 flow [2022-07-12 10:41:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:41:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:41:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-12 10:41:26,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-12 10:41:26,216 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-12 10:41:26,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-12 10:41:26,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:26,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-12 10:41:26,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,218 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,218 INFO L186 Difference]: Start difference. First operand has 182 places, 222 transitions, 3327 flow. Second operand 7 states and 483 transitions. [2022-07-12 10:41:26,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 238 transitions, 3750 flow [2022-07-12 10:41:26,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 238 transitions, 3701 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-12 10:41:26,243 INFO L242 Difference]: Finished difference. Result has 188 places, 217 transitions, 3202 flow [2022-07-12 10:41:26,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3202, PETRI_PLACES=188, PETRI_TRANSITIONS=217} [2022-07-12 10:41:26,244 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 111 predicate places. [2022-07-12 10:41:26,244 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 217 transitions, 3202 flow [2022-07-12 10:41:26,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,244 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:26,244 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] [2022-07-12 10:41:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 10:41:26,245 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1170896073, now seen corresponding path program 6 times [2022-07-12 10:41:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:26,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629208002] [2022-07-12 10:41:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:26,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:26,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629208002] [2022-07-12 10:41:26,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629208002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:26,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:26,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:26,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267509339] [2022-07-12 10:41:26,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:26,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:26,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:26,267 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:26,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 217 transitions, 3202 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:26,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:26,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:26,398 INFO L129 PetriNetUnfolder]: 213/644 cut-off events. [2022-07-12 10:41:26,399 INFO L130 PetriNetUnfolder]: For 10179/10181 co-relation queries the response was YES. [2022-07-12 10:41:26,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 644 events. 213/644 cut-off events. For 10179/10181 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3530 event pairs, 52 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 3502. Up to 195 conditions per place. [2022-07-12 10:41:26,404 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2022-07-12 10:41:26,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 224 transitions, 3472 flow [2022-07-12 10:41:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:41:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:41:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-07-12 10:41:26,405 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-07-12 10:41:26,405 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-07-12 10:41:26,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-07-12 10:41:26,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:26,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-07-12 10:41:26,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,407 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,407 INFO L186 Difference]: Start difference. First operand has 188 places, 217 transitions, 3202 flow. Second operand 8 states and 550 transitions. [2022-07-12 10:41:26,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 224 transitions, 3472 flow [2022-07-12 10:41:26,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 224 transitions, 3236 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-07-12 10:41:26,430 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 2861 flow [2022-07-12 10:41:26,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2861, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2022-07-12 10:41:26,430 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-12 10:41:26,430 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 2861 flow [2022-07-12 10:41:26,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:26,431 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] [2022-07-12 10:41:26,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-12 10:41:26,431 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1496756239, now seen corresponding path program 6 times [2022-07-12 10:41:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944867888] [2022-07-12 10:41:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:26,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944867888] [2022-07-12 10:41:26,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944867888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:41:26,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:41:26,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:41:26,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098827678] [2022-07-12 10:41:26,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:41:26,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:41:26,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:41:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:41:26,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-12 10:41:26,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 2861 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:26,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-12 10:41:26,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:26,562 INFO L129 PetriNetUnfolder]: 196/570 cut-off events. [2022-07-12 10:41:26,562 INFO L130 PetriNetUnfolder]: For 8353/8355 co-relation queries the response was YES. [2022-07-12 10:41:26,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 570 events. 196/570 cut-off events. For 8353/8355 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2872 event pairs, 39 based on Foata normal form. 3/567 useless extension candidates. Maximal degree in co-relation 3110. Up to 190 conditions per place. [2022-07-12 10:41:26,566 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2022-07-12 10:41:26,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 3042 flow [2022-07-12 10:41:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:41:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:41:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-07-12 10:41:26,568 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-07-12 10:41:26,568 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-07-12 10:41:26,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-07-12 10:41:26,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:26,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-07-12 10:41:26,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,570 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,570 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 2861 flow. Second operand 7 states and 480 transitions. [2022-07-12 10:41:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 3042 flow [2022-07-12 10:41:26,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 206 transitions, 2918 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-12 10:41:26,603 INFO L242 Difference]: Finished difference. Result has 170 places, 189 transitions, 2602 flow [2022-07-12 10:41:26,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2602, PETRI_PLACES=170, PETRI_TRANSITIONS=189} [2022-07-12 10:41:26,604 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-12 10:41:26,604 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 189 transitions, 2602 flow [2022-07-12 10:41:26,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,605 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:26,605 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] [2022-07-12 10:41:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-12 10:41:26,605 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:26,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2022-07-12 10:41:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:26,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666530709] [2022-07-12 10:41:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:26,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666530709] [2022-07-12 10:41:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666530709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449986173] [2022-07-12 10:41:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:26,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:26,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:26,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:26,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:41:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:27,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:27,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449986173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:27,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:27,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:41:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816555508] [2022-07-12 10:41:27,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:27,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:41:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:41:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:41:27,620 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:41:27,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 189 transitions, 2602 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:27,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:27,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:41:27,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:36,437 INFO L129 PetriNetUnfolder]: 972/2287 cut-off events. [2022-07-12 10:41:36,437 INFO L130 PetriNetUnfolder]: For 31601/31601 co-relation queries the response was YES. [2022-07-12 10:41:36,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12769 conditions, 2287 events. 972/2287 cut-off events. For 31601/31601 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15565 event pairs, 33 based on Foata normal form. 3/2277 useless extension candidates. Maximal degree in co-relation 12733. Up to 363 conditions per place. [2022-07-12 10:41:36,459 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 857 changer transitions 17/1160 dead transitions. [2022-07-12 10:41:36,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1160 transitions, 16998 flow [2022-07-12 10:41:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-07-12 10:41:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-07-12 10:41:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-07-12 10:41:36,471 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-07-12 10:41:36,472 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-07-12 10:41:36,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-07-12 10:41:36,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:36,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-07-12 10:41:36,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:36,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:36,519 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:36,520 INFO L186 Difference]: Start difference. First operand has 170 places, 189 transitions, 2602 flow. Second operand 224 states and 11784 transitions. [2022-07-12 10:41:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1160 transitions, 16998 flow [2022-07-12 10:41:36,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1160 transitions, 16169 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-12 10:41:36,587 INFO L242 Difference]: Finished difference. Result has 439 places, 991 transitions, 15237 flow [2022-07-12 10:41:36,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=15237, PETRI_PLACES=439, PETRI_TRANSITIONS=991} [2022-07-12 10:41:36,588 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 362 predicate places. [2022-07-12 10:41:36,588 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 991 transitions, 15237 flow [2022-07-12 10:41:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:36,589 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:36,589 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] [2022-07-12 10:41:36,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:36,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:36,805 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash -950751903, now seen corresponding path program 2 times [2022-07-12 10:41:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:36,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585143973] [2022-07-12 10:41:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:36,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585143973] [2022-07-12 10:41:36,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585143973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022240272] [2022-07-12 10:41:36,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:41:36,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:36,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:36,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:36,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:41:37,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:41:37,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:37,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:37,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022240272] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:37,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:37,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:41:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442469209] [2022-07-12 10:41:37,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:37,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:41:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:41:37,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:41:37,683 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:41:37,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 991 transitions, 15237 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:37,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:37,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:41:37,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:40,185 INFO L129 PetriNetUnfolder]: 1106/2984 cut-off events. [2022-07-12 10:41:40,185 INFO L130 PetriNetUnfolder]: For 129885/129885 co-relation queries the response was YES. [2022-07-12 10:41:40,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23620 conditions, 2984 events. 1106/2984 cut-off events. For 129885/129885 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24213 event pairs, 48 based on Foata normal form. 1/2974 useless extension candidates. Maximal degree in co-relation 23523. Up to 439 conditions per place. [2022-07-12 10:41:40,223 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 764 changer transitions 45/1208 dead transitions. [2022-07-12 10:41:40,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1208 transitions, 22147 flow [2022-07-12 10:41:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-12 10:41:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-12 10:41:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-07-12 10:41:40,227 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-07-12 10:41:40,227 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-07-12 10:41:40,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-07-12 10:41:40,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:40,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-07-12 10:41:40,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:40,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:40,236 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:40,236 INFO L186 Difference]: Start difference. First operand has 439 places, 991 transitions, 15237 flow. Second operand 64 states and 3489 transitions. [2022-07-12 10:41:40,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1208 transitions, 22147 flow [2022-07-12 10:41:40,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1208 transitions, 20684 flow, removed 458 selfloop flow, removed 15 redundant places. [2022-07-12 10:41:40,587 INFO L242 Difference]: Finished difference. Result has 499 places, 1037 transitions, 16667 flow [2022-07-12 10:41:40,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=13989, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16667, PETRI_PLACES=499, PETRI_TRANSITIONS=1037} [2022-07-12 10:41:40,588 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 422 predicate places. [2022-07-12 10:41:40,588 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1037 transitions, 16667 flow [2022-07-12 10:41:40,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:40,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:40,589 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] [2022-07-12 10:41:40,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:40,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 10:41:40,802 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1414684533, now seen corresponding path program 3 times [2022-07-12 10:41:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264685223] [2022-07-12 10:41:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:40,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264685223] [2022-07-12 10:41:40,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264685223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989547553] [2022-07-12 10:41:40,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:41:40,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:40,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:40,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:40,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:41:41,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:41:41,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:41,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:41,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989547553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:41,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:41,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:41:41,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966485665] [2022-07-12 10:41:41,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:41,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:41:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:41,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:41:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:41:41,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:41:41,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1037 transitions, 16667 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:41,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:41,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:41:41,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:44,218 INFO L129 PetriNetUnfolder]: 1087/2957 cut-off events. [2022-07-12 10:41:44,218 INFO L130 PetriNetUnfolder]: For 149702/149702 co-relation queries the response was YES. [2022-07-12 10:41:44,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24789 conditions, 2957 events. 1087/2957 cut-off events. For 149702/149702 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24079 event pairs, 62 based on Foata normal form. 2/2932 useless extension candidates. Maximal degree in co-relation 24683. Up to 415 conditions per place. [2022-07-12 10:41:44,261 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 776 changer transitions 31/1185 dead transitions. [2022-07-12 10:41:44,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1185 transitions, 22459 flow [2022-07-12 10:41:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-12 10:41:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-12 10:41:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-07-12 10:41:44,264 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-07-12 10:41:44,265 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-07-12 10:41:44,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-07-12 10:41:44,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:44,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-07-12 10:41:44,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:44,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:44,274 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:44,274 INFO L186 Difference]: Start difference. First operand has 499 places, 1037 transitions, 16667 flow. Second operand 66 states and 3577 transitions. [2022-07-12 10:41:44,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1185 transitions, 22459 flow [2022-07-12 10:41:44,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1185 transitions, 20689 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-07-12 10:41:44,683 INFO L242 Difference]: Finished difference. Result has 529 places, 1054 transitions, 17180 flow [2022-07-12 10:41:44,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15010, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17180, PETRI_PLACES=529, PETRI_TRANSITIONS=1054} [2022-07-12 10:41:44,684 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 452 predicate places. [2022-07-12 10:41:44,685 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1054 transitions, 17180 flow [2022-07-12 10:41:44,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:44,685 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:44,685 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] [2022-07-12 10:41:44,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 10:41:44,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:44,901 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1843164369, now seen corresponding path program 4 times [2022-07-12 10:41:44,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:44,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265018169] [2022-07-12 10:41:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:44,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265018169] [2022-07-12 10:41:45,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265018169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25387663] [2022-07-12 10:41:45,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:41:45,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:45,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:45,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:41:45,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:41:45,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 10:41:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:45,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:45,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25387663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:45,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:45,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-12 10:41:45,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548079293] [2022-07-12 10:41:45,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:45,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:41:45,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:45,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:41:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:41:45,629 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:41:45,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1054 transitions, 17180 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 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) [2022-07-12 10:41:45,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:45,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:41:45,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:47,366 INFO L129 PetriNetUnfolder]: 1083/3028 cut-off events. [2022-07-12 10:41:47,366 INFO L130 PetriNetUnfolder]: For 161827/161827 co-relation queries the response was YES. [2022-07-12 10:41:47,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25511 conditions, 3028 events. 1083/3028 cut-off events. For 161827/161827 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25179 event pairs, 103 based on Foata normal form. 3/3002 useless extension candidates. Maximal degree in co-relation 25397. Up to 461 conditions per place. [2022-07-12 10:41:47,409 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 654 selfloop transitions, 463 changer transitions 19/1175 dead transitions. [2022-07-12 10:41:47,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1175 transitions, 22406 flow [2022-07-12 10:41:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 10:41:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-12 10:41:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2064 transitions. [2022-07-12 10:41:47,421 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.641192917054986 [2022-07-12 10:41:47,421 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2064 transitions. [2022-07-12 10:41:47,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2064 transitions. [2022-07-12 10:41:47,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:47,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2064 transitions. [2022-07-12 10:41:47,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.78378378378378) internal successors, (2064), 37 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:47,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:47,426 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:47,426 INFO L186 Difference]: Start difference. First operand has 529 places, 1054 transitions, 17180 flow. Second operand 37 states and 2064 transitions. [2022-07-12 10:41:47,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1175 transitions, 22406 flow [2022-07-12 10:41:47,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1175 transitions, 20699 flow, removed 134 selfloop flow, removed 51 redundant places. [2022-07-12 10:41:47,868 INFO L242 Difference]: Finished difference. Result has 511 places, 1069 transitions, 16845 flow [2022-07-12 10:41:47,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15596, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16845, PETRI_PLACES=511, PETRI_TRANSITIONS=1069} [2022-07-12 10:41:47,870 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 434 predicate places. [2022-07-12 10:41:47,870 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1069 transitions, 16845 flow [2022-07-12 10:41:47,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 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) [2022-07-12 10:41:47,870 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:47,870 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] [2022-07-12 10:41:47,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:48,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:48,088 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash -559814149, now seen corresponding path program 5 times [2022-07-12 10:41:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:48,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274279793] [2022-07-12 10:41:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:48,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274279793] [2022-07-12 10:41:48,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274279793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:48,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824436216] [2022-07-12 10:41:48,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:41:48,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:48,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:48,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:48,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:41:48,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:41:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:41:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:48,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:48,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824436216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:48,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:48,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-12 10:41:48,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192252120] [2022-07-12 10:41:48,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:41:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:41:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:41:48,816 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:41:48,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1069 transitions, 16845 flow. Second operand has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:48,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:48,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:41:48,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:50,512 INFO L129 PetriNetUnfolder]: 1141/3135 cut-off events. [2022-07-12 10:41:50,512 INFO L130 PetriNetUnfolder]: For 158536/158536 co-relation queries the response was YES. [2022-07-12 10:41:50,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26198 conditions, 3135 events. 1141/3135 cut-off events. For 158536/158536 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26342 event pairs, 72 based on Foata normal form. 2/3095 useless extension candidates. Maximal degree in co-relation 26086. Up to 620 conditions per place. [2022-07-12 10:41:50,557 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 316 selfloop transitions, 905 changer transitions 21/1281 dead transitions. [2022-07-12 10:41:50,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1281 transitions, 23466 flow [2022-07-12 10:41:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:41:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:41:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2440 transitions. [2022-07-12 10:41:50,559 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6232439335887612 [2022-07-12 10:41:50,559 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2440 transitions. [2022-07-12 10:41:50,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2440 transitions. [2022-07-12 10:41:50,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:50,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2440 transitions. [2022-07-12 10:41:50,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.22222222222222) internal successors, (2440), 45 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:50,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:50,565 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:50,565 INFO L186 Difference]: Start difference. First operand has 511 places, 1069 transitions, 16845 flow. Second operand 45 states and 2440 transitions. [2022-07-12 10:41:50,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1281 transitions, 23466 flow [2022-07-12 10:41:51,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1281 transitions, 22655 flow, removed 37 selfloop flow, removed 21 redundant places. [2022-07-12 10:41:51,090 INFO L242 Difference]: Finished difference. Result has 550 places, 1182 transitions, 20689 flow [2022-07-12 10:41:51,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16090, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=20689, PETRI_PLACES=550, PETRI_TRANSITIONS=1182} [2022-07-12 10:41:51,092 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 473 predicate places. [2022-07-12 10:41:51,092 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1182 transitions, 20689 flow [2022-07-12 10:41:51,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:51,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:51,093 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] [2022-07-12 10:41:51,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:51,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 10:41:51,309 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 619738599, now seen corresponding path program 6 times [2022-07-12 10:41:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:51,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080787373] [2022-07-12 10:41:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:51,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:51,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:51,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080787373] [2022-07-12 10:41:51,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080787373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:51,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949541380] [2022-07-12 10:41:51,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:41:51,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:51,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:51,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:51,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:41:51,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:41:51,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:51,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:51,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:52,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949541380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:52,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:52,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:41:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72467468] [2022-07-12 10:41:52,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:52,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:41:52,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:52,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:41:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:41:52,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:41:52,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1182 transitions, 20689 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:52,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:52,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:41:52,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:54,821 INFO L129 PetriNetUnfolder]: 1186/3337 cut-off events. [2022-07-12 10:41:54,821 INFO L130 PetriNetUnfolder]: For 183553/183553 co-relation queries the response was YES. [2022-07-12 10:41:54,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29532 conditions, 3337 events. 1186/3337 cut-off events. For 183553/183553 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28275 event pairs, 62 based on Foata normal form. 1/3311 useless extension candidates. Maximal degree in co-relation 29405. Up to 445 conditions per place. [2022-07-12 10:41:54,872 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 447 selfloop transitions, 854 changer transitions 50/1390 dead transitions. [2022-07-12 10:41:54,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1390 transitions, 29071 flow [2022-07-12 10:41:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 10:41:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-12 10:41:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3349 transitions. [2022-07-12 10:41:54,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6310533257961183 [2022-07-12 10:41:54,895 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3349 transitions. [2022-07-12 10:41:54,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3349 transitions. [2022-07-12 10:41:54,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:54,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3349 transitions. [2022-07-12 10:41:54,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.90163934426229) internal successors, (3349), 61 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:54,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:54,904 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:54,904 INFO L186 Difference]: Start difference. First operand has 550 places, 1182 transitions, 20689 flow. Second operand 61 states and 3349 transitions. [2022-07-12 10:41:54,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1390 transitions, 29071 flow [2022-07-12 10:41:55,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1390 transitions, 28528 flow, removed 176 selfloop flow, removed 15 redundant places. [2022-07-12 10:41:55,602 INFO L242 Difference]: Finished difference. Result has 609 places, 1216 transitions, 23245 flow [2022-07-12 10:41:55,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=20364, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=23245, PETRI_PLACES=609, PETRI_TRANSITIONS=1216} [2022-07-12 10:41:55,603 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 532 predicate places. [2022-07-12 10:41:55,603 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1216 transitions, 23245 flow [2022-07-12 10:41:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:55,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:55,604 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] [2022-07-12 10:41:55,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 10:41:55,820 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash 733196829, now seen corresponding path program 7 times [2022-07-12 10:41:55,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:55,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85227424] [2022-07-12 10:41:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:55,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:55,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85227424] [2022-07-12 10:41:55,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85227424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:55,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160562638] [2022-07-12 10:41:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:41:55,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:55,945 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:55,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:41:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:56,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160562638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:56,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:56,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:41:56,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049987496] [2022-07-12 10:41:56,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:56,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:41:56,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:41:56,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:41:56,666 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:41:56,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1216 transitions, 23245 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:56,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:56,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:41:56,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:00,497 INFO L129 PetriNetUnfolder]: 1221/3437 cut-off events. [2022-07-12 10:42:00,497 INFO L130 PetriNetUnfolder]: For 195893/195893 co-relation queries the response was YES. [2022-07-12 10:42:00,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31895 conditions, 3437 events. 1221/3437 cut-off events. For 195893/195893 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 29677 event pairs, 96 based on Foata normal form. 3/3392 useless extension candidates. Maximal degree in co-relation 31753. Up to 736 conditions per place. [2022-07-12 10:42:00,554 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 354 selfloop transitions, 958 changer transitions 27/1378 dead transitions. [2022-07-12 10:42:00,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 1378 transitions, 30151 flow [2022-07-12 10:42:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-12 10:42:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-12 10:42:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5100 transitions. [2022-07-12 10:42:00,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.617059891107078 [2022-07-12 10:42:00,579 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5100 transitions. [2022-07-12 10:42:00,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5100 transitions. [2022-07-12 10:42:00,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:00,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5100 transitions. [2022-07-12 10:42:00,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 53.68421052631579) internal successors, (5100), 95 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:00,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:00,589 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:00,589 INFO L186 Difference]: Start difference. First operand has 609 places, 1216 transitions, 23245 flow. Second operand 95 states and 5100 transitions. [2022-07-12 10:42:00,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 1378 transitions, 30151 flow [2022-07-12 10:42:01,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1378 transitions, 29144 flow, removed 70 selfloop flow, removed 36 redundant places. [2022-07-12 10:42:01,310 INFO L242 Difference]: Finished difference. Result has 666 places, 1253 transitions, 25416 flow [2022-07-12 10:42:01,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=22414, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=923, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=25416, PETRI_PLACES=666, PETRI_TRANSITIONS=1253} [2022-07-12 10:42:01,313 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-12 10:42:01,313 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 1253 transitions, 25416 flow [2022-07-12 10:42:01,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:01,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:01,313 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] [2022-07-12 10:42:01,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:01,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-12 10:42:01,527 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash 65432667, now seen corresponding path program 8 times [2022-07-12 10:42:01,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:01,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686468466] [2022-07-12 10:42:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686468466] [2022-07-12 10:42:01,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686468466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448335989] [2022-07-12 10:42:01,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:42:01,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:01,663 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:01,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:42:01,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:42:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:42:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:01,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:02,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448335989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:02,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:02,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:42:02,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514491098] [2022-07-12 10:42:02,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:02,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:42:02,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:02,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:42:02,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:42:02,256 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:02,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 1253 transitions, 25416 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:02,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:02,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:02,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:04,618 INFO L129 PetriNetUnfolder]: 1364/3834 cut-off events. [2022-07-12 10:42:04,619 INFO L130 PetriNetUnfolder]: For 217236/217236 co-relation queries the response was YES. [2022-07-12 10:42:04,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36359 conditions, 3834 events. 1364/3834 cut-off events. For 217236/217236 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33644 event pairs, 84 based on Foata normal form. 4/3792 useless extension candidates. Maximal degree in co-relation 36207. Up to 663 conditions per place. [2022-07-12 10:42:04,677 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 292 selfloop transitions, 1283 changer transitions 19/1633 dead transitions. [2022-07-12 10:42:04,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1633 transitions, 36148 flow [2022-07-12 10:42:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:42:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:42:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2022-07-12 10:42:04,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2022-07-12 10:42:04,680 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2022-07-12 10:42:04,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2022-07-12 10:42:04,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:04,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2022-07-12 10:42:04,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:04,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:04,686 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:04,686 INFO L186 Difference]: Start difference. First operand has 666 places, 1253 transitions, 25416 flow. Second operand 60 states and 3187 transitions. [2022-07-12 10:42:04,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1633 transitions, 36148 flow [2022-07-12 10:42:05,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1633 transitions, 34246 flow, removed 44 selfloop flow, removed 72 redundant places. [2022-07-12 10:42:05,577 INFO L242 Difference]: Finished difference. Result has 672 places, 1557 transitions, 33902 flow [2022-07-12 10:42:05,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23931, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=33902, PETRI_PLACES=672, PETRI_TRANSITIONS=1557} [2022-07-12 10:42:05,578 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 595 predicate places. [2022-07-12 10:42:05,578 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1557 transitions, 33902 flow [2022-07-12 10:42:05,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:05,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:05,579 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] [2022-07-12 10:42:05,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:05,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 10:42:05,788 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1800442661, now seen corresponding path program 9 times [2022-07-12 10:42:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:05,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485203370] [2022-07-12 10:42:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:05,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:05,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485203370] [2022-07-12 10:42:05,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485203370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:05,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803002505] [2022-07-12 10:42:05,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:42:05,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:05,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:05,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:05,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:42:06,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:42:06,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:06,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:42:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:06,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:06,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803002505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:06,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:06,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:42:06,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508610373] [2022-07-12 10:42:06,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:06,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:42:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:42:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:42:06,684 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:06,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1557 transitions, 33902 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:06,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:06,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:06,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:12,828 INFO L129 PetriNetUnfolder]: 1393/3839 cut-off events. [2022-07-12 10:42:12,828 INFO L130 PetriNetUnfolder]: For 271221/271221 co-relation queries the response was YES. [2022-07-12 10:42:12,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40393 conditions, 3839 events. 1393/3839 cut-off events. For 271221/271221 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 33713 event pairs, 106 based on Foata normal form. 3/3787 useless extension candidates. Maximal degree in co-relation 40225. Up to 924 conditions per place. [2022-07-12 10:42:12,893 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 382 selfloop transitions, 1278 changer transitions 28/1727 dead transitions. [2022-07-12 10:42:12,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 1727 transitions, 42932 flow [2022-07-12 10:42:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-07-12 10:42:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-07-12 10:42:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7704 transitions. [2022-07-12 10:42:12,920 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6065186584789797 [2022-07-12 10:42:12,921 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7704 transitions. [2022-07-12 10:42:12,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7704 transitions. [2022-07-12 10:42:12,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:12,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7704 transitions. [2022-07-12 10:42:12,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.76712328767123) internal successors, (7704), 146 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:12,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:12,961 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:12,961 INFO L186 Difference]: Start difference. First operand has 672 places, 1557 transitions, 33902 flow. Second operand 146 states and 7704 transitions. [2022-07-12 10:42:12,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 1727 transitions, 42932 flow [2022-07-12 10:42:14,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1727 transitions, 41156 flow, removed 779 selfloop flow, removed 19 redundant places. [2022-07-12 10:42:14,372 INFO L242 Difference]: Finished difference. Result has 813 places, 1575 transitions, 36645 flow [2022-07-12 10:42:14,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33228, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=36645, PETRI_PLACES=813, PETRI_TRANSITIONS=1575} [2022-07-12 10:42:14,375 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 736 predicate places. [2022-07-12 10:42:14,375 INFO L495 AbstractCegarLoop]: Abstraction has has 813 places, 1575 transitions, 36645 flow [2022-07-12 10:42:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:14,375 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:14,376 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] [2022-07-12 10:42:14,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 10:42:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:14,591 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash 959815931, now seen corresponding path program 10 times [2022-07-12 10:42:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649959172] [2022-07-12 10:42:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:14,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649959172] [2022-07-12 10:42:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649959172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807528646] [2022-07-12 10:42:14,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:42:14,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:14,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:14,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:14,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:42:14,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:42:14,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:14,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 10:42:14,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:15,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:15,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807528646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:15,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:15,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-12 10:42:15,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169893583] [2022-07-12 10:42:15,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:15,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:42:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:42:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:42:15,345 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:15,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 1575 transitions, 36645 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:15,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:15,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:15,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:19,254 INFO L129 PetriNetUnfolder]: 1473/4010 cut-off events. [2022-07-12 10:42:19,254 INFO L130 PetriNetUnfolder]: For 246913/246913 co-relation queries the response was YES. [2022-07-12 10:42:19,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41945 conditions, 4010 events. 1473/4010 cut-off events. For 246913/246913 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 35474 event pairs, 194 based on Foata normal form. 2/3945 useless extension candidates. Maximal degree in co-relation 41764. Up to 1060 conditions per place. [2022-07-12 10:42:19,331 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 775 selfloop transitions, 1007 changer transitions 13/1834 dead transitions. [2022-07-12 10:42:19,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 1834 transitions, 46444 flow [2022-07-12 10:42:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-12 10:42:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-07-12 10:42:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5376 transitions. [2022-07-12 10:42:19,346 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6118129054284739 [2022-07-12 10:42:19,346 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5376 transitions. [2022-07-12 10:42:19,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5376 transitions. [2022-07-12 10:42:19,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:19,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5376 transitions. [2022-07-12 10:42:19,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 53.227722772277225) internal successors, (5376), 101 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:19,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:19,356 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:19,356 INFO L186 Difference]: Start difference. First operand has 813 places, 1575 transitions, 36645 flow. Second operand 101 states and 5376 transitions. [2022-07-12 10:42:19,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 903 places, 1834 transitions, 46444 flow [2022-07-12 10:42:20,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1834 transitions, 42870 flow, removed 540 selfloop flow, removed 133 redundant places. [2022-07-12 10:42:20,564 INFO L242 Difference]: Finished difference. Result has 788 places, 1713 transitions, 39246 flow [2022-07-12 10:42:20,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=34281, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=39246, PETRI_PLACES=788, PETRI_TRANSITIONS=1713} [2022-07-12 10:42:20,565 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 711 predicate places. [2022-07-12 10:42:20,566 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 1713 transitions, 39246 flow [2022-07-12 10:42:20,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:20,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:20,566 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] [2022-07-12 10:42:20,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 10:42:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-12 10:42:20,779 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -612854579, now seen corresponding path program 11 times [2022-07-12 10:42:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:20,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169660298] [2022-07-12 10:42:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:20,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:20,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169660298] [2022-07-12 10:42:20,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169660298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:20,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678173546] [2022-07-12 10:42:20,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:42:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:20,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:20,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:42:21,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:42:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:21,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:42:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:21,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:21,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678173546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:21,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:21,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:42:21,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264161505] [2022-07-12 10:42:21,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:21,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:42:21,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:42:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:42:21,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:21,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1713 transitions, 39246 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:21,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:21,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:21,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:28,000 INFO L129 PetriNetUnfolder]: 1471/4032 cut-off events. [2022-07-12 10:42:28,001 INFO L130 PetriNetUnfolder]: For 125121/125121 co-relation queries the response was YES. [2022-07-12 10:42:28,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37149 conditions, 4032 events. 1471/4032 cut-off events. For 125121/125121 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35697 event pairs, 118 based on Foata normal form. 2/3977 useless extension candidates. Maximal degree in co-relation 36963. Up to 835 conditions per place. [2022-07-12 10:42:28,085 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 439 selfloop transitions, 1376 changer transitions 40/1894 dead transitions. [2022-07-12 10:42:28,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 1894 transitions, 46559 flow [2022-07-12 10:42:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-07-12 10:42:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-07-12 10:42:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 7892 transitions. [2022-07-12 10:42:28,092 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.608809689115174 [2022-07-12 10:42:28,092 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 7892 transitions. [2022-07-12 10:42:28,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 7892 transitions. [2022-07-12 10:42:28,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:28,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 7892 transitions. [2022-07-12 10:42:28,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 52.966442953020135) internal successors, (7892), 149 states have internal predecessors, (7892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:28,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 87.0) internal successors, (13050), 150 states have internal predecessors, (13050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:28,145 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 87.0) internal successors, (13050), 150 states have internal predecessors, (13050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:28,149 INFO L186 Difference]: Start difference. First operand has 788 places, 1713 transitions, 39246 flow. Second operand 149 states and 7892 transitions. [2022-07-12 10:42:28,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 1894 transitions, 46559 flow [2022-07-12 10:42:29,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 1894 transitions, 45317 flow, removed 56 selfloop flow, removed 28 redundant places. [2022-07-12 10:42:29,314 INFO L242 Difference]: Finished difference. Result has 916 places, 1709 transitions, 40902 flow [2022-07-12 10:42:29,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38038, PETRI_DIFFERENCE_MINUEND_PLACES=757, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=40902, PETRI_PLACES=916, PETRI_TRANSITIONS=1709} [2022-07-12 10:42:29,316 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 839 predicate places. [2022-07-12 10:42:29,316 INFO L495 AbstractCegarLoop]: Abstraction has has 916 places, 1709 transitions, 40902 flow [2022-07-12 10:42:29,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:29,316 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:29,317 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] [2022-07-12 10:42:29,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 10:42:29,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:29,531 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:29,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash -446656927, now seen corresponding path program 12 times [2022-07-12 10:42:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:29,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044409436] [2022-07-12 10:42:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:29,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044409436] [2022-07-12 10:42:29,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044409436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:29,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518478428] [2022-07-12 10:42:29,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:42:29,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:29,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:29,657 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:29,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:42:29,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:42:29,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:42:29,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:29,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:30,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518478428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:30,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:30,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-12 10:42:30,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923124876] [2022-07-12 10:42:30,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:30,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:42:30,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:42:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:42:30,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:30,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 1709 transitions, 40902 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:30,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:30,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:30,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:33,151 INFO L129 PetriNetUnfolder]: 1530/4318 cut-off events. [2022-07-12 10:42:33,152 INFO L130 PetriNetUnfolder]: For 140902/140902 co-relation queries the response was YES. [2022-07-12 10:42:33,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40138 conditions, 4318 events. 1530/4318 cut-off events. For 140902/140902 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 39572 event pairs, 90 based on Foata normal form. 3/4284 useless extension candidates. Maximal degree in co-relation 39944. Up to 782 conditions per place. [2022-07-12 10:42:33,345 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 436 selfloop transitions, 1282 changer transitions 73/1830 dead transitions. [2022-07-12 10:42:33,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 1830 transitions, 47280 flow [2022-07-12 10:42:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 10:42:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-12 10:42:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2906 transitions. [2022-07-12 10:42:33,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6185610898254577 [2022-07-12 10:42:33,348 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2906 transitions. [2022-07-12 10:42:33,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2906 transitions. [2022-07-12 10:42:33,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:33,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2906 transitions. [2022-07-12 10:42:33,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.81481481481482) internal successors, (2906), 54 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:33,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:33,353 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:33,353 INFO L186 Difference]: Start difference. First operand has 916 places, 1709 transitions, 40902 flow. Second operand 54 states and 2906 transitions. [2022-07-12 10:42:33,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 1830 transitions, 47280 flow [2022-07-12 10:42:34,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 1830 transitions, 45375 flow, removed 35 selfloop flow, removed 129 redundant places. [2022-07-12 10:42:34,470 INFO L242 Difference]: Finished difference. Result has 832 places, 1694 transitions, 41282 flow [2022-07-12 10:42:34,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39018, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=41282, PETRI_PLACES=832, PETRI_TRANSITIONS=1694} [2022-07-12 10:42:34,472 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 755 predicate places. [2022-07-12 10:42:34,472 INFO L495 AbstractCegarLoop]: Abstraction has has 832 places, 1694 transitions, 41282 flow [2022-07-12 10:42:34,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:34,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:34,472 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] [2022-07-12 10:42:34,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-12 10:42:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:34,688 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash 8615431, now seen corresponding path program 13 times [2022-07-12 10:42:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:34,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693189162] [2022-07-12 10:42:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:34,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693189162] [2022-07-12 10:42:34,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693189162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973301028] [2022-07-12 10:42:34,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:42:34,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:34,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:34,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:42:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:42:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:35,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:35,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973301028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:35,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:35,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:42:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451822739] [2022-07-12 10:42:35,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:42:35,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:42:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:42:35,480 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:35,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1694 transitions, 41282 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:35,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:35,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:35,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:43,199 INFO L129 PetriNetUnfolder]: 1412/3887 cut-off events. [2022-07-12 10:42:43,200 INFO L130 PetriNetUnfolder]: For 134181/134181 co-relation queries the response was YES. [2022-07-12 10:42:43,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37600 conditions, 3887 events. 1412/3887 cut-off events. For 134181/134181 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 34014 event pairs, 97 based on Foata normal form. 4/3856 useless extension candidates. Maximal degree in co-relation 37409. Up to 692 conditions per place. [2022-07-12 10:42:43,270 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 428 selfloop transitions, 1367 changer transitions 35/1869 dead transitions. [2022-07-12 10:42:43,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1010 places, 1869 transitions, 48317 flow [2022-07-12 10:42:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-12 10:42:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-07-12 10:42:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 10038 transitions. [2022-07-12 10:42:43,276 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6072595281306715 [2022-07-12 10:42:43,276 INFO L72 ComplementDD]: Start complementDD. Operand 190 states and 10038 transitions. [2022-07-12 10:42:43,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 190 states and 10038 transitions. [2022-07-12 10:42:43,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:43,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 190 states and 10038 transitions. [2022-07-12 10:42:43,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 191 states, 190 states have (on average 52.83157894736842) internal successors, (10038), 190 states have internal predecessors, (10038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:43,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 191 states, 191 states have (on average 87.0) internal successors, (16617), 191 states have internal predecessors, (16617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:43,294 INFO L81 ComplementDD]: Finished complementDD. Result has 191 states, 191 states have (on average 87.0) internal successors, (16617), 191 states have internal predecessors, (16617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:43,294 INFO L186 Difference]: Start difference. First operand has 832 places, 1694 transitions, 41282 flow. Second operand 190 states and 10038 transitions. [2022-07-12 10:42:43,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1010 places, 1869 transitions, 48317 flow [2022-07-12 10:42:44,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 958 places, 1869 transitions, 45397 flow, removed 80 selfloop flow, removed 52 redundant places. [2022-07-12 10:42:44,417 INFO L242 Difference]: Finished difference. Result has 966 places, 1677 transitions, 40978 flow [2022-07-12 10:42:44,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38489, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=190, PETRI_FLOW=40978, PETRI_PLACES=966, PETRI_TRANSITIONS=1677} [2022-07-12 10:42:44,418 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 889 predicate places. [2022-07-12 10:42:44,418 INFO L495 AbstractCegarLoop]: Abstraction has has 966 places, 1677 transitions, 40978 flow [2022-07-12 10:42:44,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:44,419 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:44,419 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] [2022-07-12 10:42:44,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:44,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-12 10:42:44,621 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 739671021, now seen corresponding path program 14 times [2022-07-12 10:42:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779196209] [2022-07-12 10:42:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:44,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:44,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779196209] [2022-07-12 10:42:44,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779196209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:44,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116043927] [2022-07-12 10:42:44,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:42:44,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:44,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:44,754 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:44,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:42:44,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:42:44,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:42:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:45,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:45,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116043927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:45,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:45,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:42:45,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321622185] [2022-07-12 10:42:45,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:45,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:42:45,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:45,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:42:45,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:42:45,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:45,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 1677 transitions, 40978 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:45,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:45,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:45,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:48,036 INFO L129 PetriNetUnfolder]: 1404/3801 cut-off events. [2022-07-12 10:42:48,036 INFO L130 PetriNetUnfolder]: For 127173/127173 co-relation queries the response was YES. [2022-07-12 10:42:48,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37115 conditions, 3801 events. 1404/3801 cut-off events. For 127173/127173 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32809 event pairs, 82 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 36928. Up to 722 conditions per place. [2022-07-12 10:42:48,109 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 286 selfloop transitions, 1381 changer transitions 21/1727 dead transitions. [2022-07-12 10:42:48,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 1727 transitions, 45280 flow [2022-07-12 10:42:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-12 10:42:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-12 10:42:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3074 transitions. [2022-07-12 10:42:48,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2022-07-12 10:42:48,111 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3074 transitions. [2022-07-12 10:42:48,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3074 transitions. [2022-07-12 10:42:48,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:48,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3074 transitions. [2022-07-12 10:42:48,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.0) internal successors, (3074), 58 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:48,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:48,116 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:48,117 INFO L186 Difference]: Start difference. First operand has 966 places, 1677 transitions, 40978 flow. Second operand 58 states and 3074 transitions. [2022-07-12 10:42:48,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 1727 transitions, 45280 flow [2022-07-12 10:42:49,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1727 transitions, 42946 flow, removed 19 selfloop flow, removed 168 redundant places. [2022-07-12 10:42:49,189 INFO L242 Difference]: Finished difference. Result has 840 places, 1661 transitions, 41061 flow [2022-07-12 10:42:49,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38664, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=41061, PETRI_PLACES=840, PETRI_TRANSITIONS=1661} [2022-07-12 10:42:49,191 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 763 predicate places. [2022-07-12 10:42:49,191 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 1661 transitions, 41061 flow [2022-07-12 10:42:49,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:49,191 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:49,191 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] [2022-07-12 10:42:49,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:49,407 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1010313819, now seen corresponding path program 15 times [2022-07-12 10:42:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:49,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611956047] [2022-07-12 10:42:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:49,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:49,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611956047] [2022-07-12 10:42:49,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611956047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:49,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135283454] [2022-07-12 10:42:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:42:49,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:49,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:49,564 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:49,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:42:49,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:42:49,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:49,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:42:49,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:49,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:50,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135283454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:50,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:50,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:42:50,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073854686] [2022-07-12 10:42:50,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:50,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:42:50,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:50,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:42:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:42:50,162 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:50,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1661 transitions, 41061 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:50,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:50,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:50,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:53,132 INFO L129 PetriNetUnfolder]: 1400/3793 cut-off events. [2022-07-12 10:42:53,132 INFO L130 PetriNetUnfolder]: For 128224/128224 co-relation queries the response was YES. [2022-07-12 10:42:53,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37695 conditions, 3793 events. 1400/3793 cut-off events. For 128224/128224 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32733 event pairs, 78 based on Foata normal form. 1/3764 useless extension candidates. Maximal degree in co-relation 37512. Up to 556 conditions per place. [2022-07-12 10:42:53,212 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 282 selfloop transitions, 1398 changer transitions 9/1728 dead transitions. [2022-07-12 10:42:53,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 1728 transitions, 45650 flow [2022-07-12 10:42:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:42:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:42:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3177 transitions. [2022-07-12 10:42:53,215 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6086206896551725 [2022-07-12 10:42:53,215 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3177 transitions. [2022-07-12 10:42:53,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3177 transitions. [2022-07-12 10:42:53,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:53,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3177 transitions. [2022-07-12 10:42:53,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.95) internal successors, (3177), 60 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:53,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:53,220 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:53,220 INFO L186 Difference]: Start difference. First operand has 840 places, 1661 transitions, 41061 flow. Second operand 60 states and 3177 transitions. [2022-07-12 10:42:53,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 893 places, 1728 transitions, 45650 flow [2022-07-12 10:42:54,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 1728 transitions, 43367 flow, removed 16 selfloop flow, removed 47 redundant places. [2022-07-12 10:42:54,540 INFO L242 Difference]: Finished difference. Result has 849 places, 1665 transitions, 41736 flow [2022-07-12 10:42:54,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38814, PETRI_DIFFERENCE_MINUEND_PLACES=787, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=41736, PETRI_PLACES=849, PETRI_TRANSITIONS=1665} [2022-07-12 10:42:54,542 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 772 predicate places. [2022-07-12 10:42:54,542 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 1665 transitions, 41736 flow [2022-07-12 10:42:54,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:54,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:54,543 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] [2022-07-12 10:42:54,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:54,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:54,761 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1051537019, now seen corresponding path program 16 times [2022-07-12 10:42:54,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:54,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472587785] [2022-07-12 10:42:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:54,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:54,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:54,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472587785] [2022-07-12 10:42:54,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472587785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:54,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634876362] [2022-07-12 10:42:54,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:42:54,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:54,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:54,911 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:54,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:42:54,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:42:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 10:42:54,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:55,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:55,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634876362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:55,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:55,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-12 10:42:55,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943225113] [2022-07-12 10:42:55,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:55,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:42:55,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:42:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:42:55,513 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:42:55,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 1665 transitions, 41736 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:55,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:55,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:42:55,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:00,087 INFO L129 PetriNetUnfolder]: 1541/4021 cut-off events. [2022-07-12 10:43:00,088 INFO L130 PetriNetUnfolder]: For 133576/133576 co-relation queries the response was YES. [2022-07-12 10:43:00,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41150 conditions, 4021 events. 1541/4021 cut-off events. For 133576/133576 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34362 event pairs, 171 based on Foata normal form. 3/3974 useless extension candidates. Maximal degree in co-relation 40967. Up to 858 conditions per place. [2022-07-12 10:43:00,160 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 781 selfloop transitions, 1171 changer transitions 26/2017 dead transitions. [2022-07-12 10:43:00,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 2017 transitions, 53397 flow [2022-07-12 10:43:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-12 10:43:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-07-12 10:43:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 6154 transitions. [2022-07-12 10:43:00,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.609789932619897 [2022-07-12 10:43:00,164 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 6154 transitions. [2022-07-12 10:43:00,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 6154 transitions. [2022-07-12 10:43:00,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:00,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 6154 transitions. [2022-07-12 10:43:00,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 53.05172413793103) internal successors, (6154), 116 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:00,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 87.0) internal successors, (10179), 117 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:00,174 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 87.0) internal successors, (10179), 117 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:00,174 INFO L186 Difference]: Start difference. First operand has 849 places, 1665 transitions, 41736 flow. Second operand 116 states and 6154 transitions. [2022-07-12 10:43:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 2017 transitions, 53397 flow [2022-07-12 10:43:01,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 2017 transitions, 50540 flow, removed 5 selfloop flow, removed 51 redundant places. [2022-07-12 10:43:01,348 INFO L242 Difference]: Finished difference. Result has 930 places, 1882 transitions, 46945 flow [2022-07-12 10:43:01,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39359, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=957, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=46945, PETRI_PLACES=930, PETRI_TRANSITIONS=1882} [2022-07-12 10:43:01,350 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 853 predicate places. [2022-07-12 10:43:01,350 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 1882 transitions, 46945 flow [2022-07-12 10:43:01,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:01,351 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:01,351 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] [2022-07-12 10:43:01,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 10:43:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:01,563 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1509753261, now seen corresponding path program 17 times [2022-07-12 10:43:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:01,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105323003] [2022-07-12 10:43:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:01,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105323003] [2022-07-12 10:43:01,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105323003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24391331] [2022-07-12 10:43:01,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:43:01,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:01,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:01,735 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:01,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 10:43:01,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:43:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:43:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:02,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:02,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24391331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:02,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:02,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-12 10:43:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303351728] [2022-07-12 10:43:02,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:02,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:43:02,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:02,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:43:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:43:02,435 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:43:02,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 1882 transitions, 46945 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:02,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:02,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:43:02,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:05,558 INFO L129 PetriNetUnfolder]: 1768/4475 cut-off events. [2022-07-12 10:43:05,558 INFO L130 PetriNetUnfolder]: For 153513/153513 co-relation queries the response was YES. [2022-07-12 10:43:05,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47004 conditions, 4475 events. 1768/4475 cut-off events. For 153513/153513 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 38096 event pairs, 104 based on Foata normal form. 1/4437 useless extension candidates. Maximal degree in co-relation 46803. Up to 896 conditions per place. [2022-07-12 10:43:05,650 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 666 selfloop transitions, 1600 changer transitions 9/2314 dead transitions. [2022-07-12 10:43:05,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 2314 transitions, 61976 flow [2022-07-12 10:43:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 10:43:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-12 10:43:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-07-12 10:43:05,652 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-07-12 10:43:05,652 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-07-12 10:43:05,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-07-12 10:43:05,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:05,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-07-12 10:43:05,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 53.43181818181818) internal successors, (2351), 44 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:05,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:05,656 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:05,656 INFO L186 Difference]: Start difference. First operand has 930 places, 1882 transitions, 46945 flow. Second operand 44 states and 2351 transitions. [2022-07-12 10:43:05,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 2314 transitions, 61976 flow [2022-07-12 10:43:07,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 918 places, 2314 transitions, 60528 flow, removed 103 selfloop flow, removed 44 redundant places. [2022-07-12 10:43:07,091 INFO L242 Difference]: Finished difference. Result has 947 places, 2237 transitions, 60282 flow [2022-07-12 10:43:07,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=45792, PETRI_DIFFERENCE_MINUEND_PLACES=875, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=60282, PETRI_PLACES=947, PETRI_TRANSITIONS=2237} [2022-07-12 10:43:07,093 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 870 predicate places. [2022-07-12 10:43:07,093 INFO L495 AbstractCegarLoop]: Abstraction has has 947 places, 2237 transitions, 60282 flow [2022-07-12 10:43:07,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:07,094 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:07,094 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] [2022-07-12 10:43:07,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-12 10:43:07,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-12 10:43:07,309 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2133095729, now seen corresponding path program 18 times [2022-07-12 10:43:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:07,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213881065] [2022-07-12 10:43:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:07,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:07,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213881065] [2022-07-12 10:43:07,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213881065] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:07,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555463054] [2022-07-12 10:43:07,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:43:07,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:07,429 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:07,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 10:43:07,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:43:07,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:43:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:07,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:07,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555463054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:07,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:07,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-12 10:43:07,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553563750] [2022-07-12 10:43:07,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:43:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:07,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:43:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:43:07,987 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:43:07,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 947 places, 2237 transitions, 60282 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:07,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:07,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:43:07,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:11,881 INFO L129 PetriNetUnfolder]: 2184/5326 cut-off events. [2022-07-12 10:43:11,881 INFO L130 PetriNetUnfolder]: For 203232/203232 co-relation queries the response was YES. [2022-07-12 10:43:11,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61291 conditions, 5326 events. 2184/5326 cut-off events. For 203232/203232 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 45426 event pairs, 111 based on Foata normal form. 1/5287 useless extension candidates. Maximal degree in co-relation 61073. Up to 1078 conditions per place. [2022-07-12 10:43:12,010 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 963 selfloop transitions, 1938 changer transitions 9/2949 dead transitions. [2022-07-12 10:43:12,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 2949 transitions, 85202 flow [2022-07-12 10:43:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:43:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:43:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1923 transitions. [2022-07-12 10:43:12,012 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6139846743295019 [2022-07-12 10:43:12,012 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1923 transitions. [2022-07-12 10:43:12,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1923 transitions. [2022-07-12 10:43:12,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:12,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1923 transitions. [2022-07-12 10:43:12,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.416666666666664) internal successors, (1923), 36 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:12,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:12,016 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:12,016 INFO L186 Difference]: Start difference. First operand has 947 places, 2237 transitions, 60282 flow. Second operand 36 states and 1923 transitions. [2022-07-12 10:43:12,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 2949 transitions, 85202 flow [2022-07-12 10:43:14,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 2949 transitions, 84921 flow, removed 64 selfloop flow, removed 13 redundant places. [2022-07-12 10:43:14,429 INFO L242 Difference]: Finished difference. Result has 986 places, 2860 transitions, 83626 flow [2022-07-12 10:43:14,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60051, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=83626, PETRI_PLACES=986, PETRI_TRANSITIONS=2860} [2022-07-12 10:43:14,431 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 909 predicate places. [2022-07-12 10:43:14,431 INFO L495 AbstractCegarLoop]: Abstraction has has 986 places, 2860 transitions, 83626 flow [2022-07-12 10:43:14,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:14,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:14,431 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] [2022-07-12 10:43:14,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 10:43:14,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-12 10:43:14,647 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:14,647 INFO L85 PathProgramCache]: Analyzing trace with hash -796421737, now seen corresponding path program 19 times [2022-07-12 10:43:14,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:14,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380874301] [2022-07-12 10:43:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:14,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:14,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:14,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380874301] [2022-07-12 10:43:14,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380874301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:14,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645671474] [2022-07-12 10:43:14,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:43:14,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:14,853 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:14,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 10:43:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:14,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:43:14,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:15,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:15,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645671474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:15,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:15,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:43:15,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442819357] [2022-07-12 10:43:15,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:15,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:43:15,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:15,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:43:15,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:43:15,493 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:43:15,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 986 places, 2860 transitions, 83626 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:15,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:15,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:43:15,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:22,506 INFO L129 PetriNetUnfolder]: 2415/5809 cut-off events. [2022-07-12 10:43:22,507 INFO L130 PetriNetUnfolder]: For 246812/246812 co-relation queries the response was YES. [2022-07-12 10:43:22,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71303 conditions, 5809 events. 2415/5809 cut-off events. For 246812/246812 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 49876 event pairs, 105 based on Foata normal form. 1/5770 useless extension candidates. Maximal degree in co-relation 71068. Up to 1099 conditions per place. [2022-07-12 10:43:22,801 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1064 selfloop transitions, 2268 changer transitions 10/3381 dead transitions. [2022-07-12 10:43:22,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1068 places, 3381 transitions, 104032 flow [2022-07-12 10:43:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 10:43:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-12 10:43:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4603 transitions. [2022-07-12 10:43:22,804 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6081384595058792 [2022-07-12 10:43:22,804 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4603 transitions. [2022-07-12 10:43:22,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4603 transitions. [2022-07-12 10:43:22,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:22,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4603 transitions. [2022-07-12 10:43:22,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 52.9080459770115) internal successors, (4603), 87 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:22,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:22,812 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:22,812 INFO L186 Difference]: Start difference. First operand has 986 places, 2860 transitions, 83626 flow. Second operand 87 states and 4603 transitions. [2022-07-12 10:43:22,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1068 places, 3381 transitions, 104032 flow [2022-07-12 10:43:25,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 3381 transitions, 103402 flow, removed 103 selfloop flow, removed 11 redundant places. [2022-07-12 10:43:26,052 INFO L242 Difference]: Finished difference. Result has 1083 places, 3267 transitions, 100762 flow [2022-07-12 10:43:26,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=83119, PETRI_DIFFERENCE_MINUEND_PLACES=971, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=100762, PETRI_PLACES=1083, PETRI_TRANSITIONS=3267} [2022-07-12 10:43:26,054 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1006 predicate places. [2022-07-12 10:43:26,054 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 3267 transitions, 100762 flow [2022-07-12 10:43:26,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:26,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:26,054 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] [2022-07-12 10:43:26,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-12 10:43:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:26,261 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 418442369, now seen corresponding path program 20 times [2022-07-12 10:43:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:26,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706690358] [2022-07-12 10:43:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:26,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:26,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706690358] [2022-07-12 10:43:26,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706690358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:26,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654919357] [2022-07-12 10:43:26,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:43:26,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:26,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:26,390 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:26,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 10:43:26,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:43:26,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:43:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:26,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:27,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654919357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:27,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:27,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:43:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490095449] [2022-07-12 10:43:27,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:27,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:43:27,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:43:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:43:27,069 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:43:27,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 3267 transitions, 100762 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:27,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:27,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:43:27,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:33,930 INFO L129 PetriNetUnfolder]: 2416/5848 cut-off events. [2022-07-12 10:43:33,930 INFO L130 PetriNetUnfolder]: For 276489/276489 co-relation queries the response was YES. [2022-07-12 10:43:34,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74843 conditions, 5848 events. 2416/5848 cut-off events. For 276489/276489 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 50576 event pairs, 123 based on Foata normal form. 1/5809 useless extension candidates. Maximal degree in co-relation 74588. Up to 1123 conditions per place. [2022-07-12 10:43:34,085 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1343 selfloop transitions, 1970 changer transitions 10/3362 dead transitions. [2022-07-12 10:43:34,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 3362 transitions, 109573 flow [2022-07-12 10:43:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 10:43:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-12 10:43:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2022-07-12 10:43:34,088 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2022-07-12 10:43:34,088 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2022-07-12 10:43:34,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2022-07-12 10:43:34,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:34,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2022-07-12 10:43:34,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.22222222222222) internal successors, (2874), 54 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:34,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:34,093 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:34,093 INFO L186 Difference]: Start difference. First operand has 1083 places, 3267 transitions, 100762 flow. Second operand 54 states and 2874 transitions. [2022-07-12 10:43:34,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 3362 transitions, 109573 flow [2022-07-12 10:43:38,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1111 places, 3362 transitions, 108811 flow, removed 121 selfloop flow, removed 20 redundant places. [2022-07-12 10:43:38,350 INFO L242 Difference]: Finished difference. Result has 1121 places, 3293 transitions, 105473 flow [2022-07-12 10:43:38,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=100023, PETRI_DIFFERENCE_MINUEND_PLACES=1058, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1945, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=105473, PETRI_PLACES=1121, PETRI_TRANSITIONS=3293} [2022-07-12 10:43:38,353 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1044 predicate places. [2022-07-12 10:43:38,353 INFO L495 AbstractCegarLoop]: Abstraction has has 1121 places, 3293 transitions, 105473 flow [2022-07-12 10:43:38,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:38,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:38,353 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] [2022-07-12 10:43:38,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 10:43:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:38,568 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1588638345, now seen corresponding path program 21 times [2022-07-12 10:43:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:38,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666252277] [2022-07-12 10:43:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:38,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:38,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666252277] [2022-07-12 10:43:38,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666252277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319050004] [2022-07-12 10:43:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:43:38,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:38,696 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:38,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 10:43:38,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:43:38,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:38,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:43:38,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:39,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:39,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319050004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:39,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:39,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-12 10:43:39,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038509591] [2022-07-12 10:43:39,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:39,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:43:39,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:43:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:43:39,393 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:43:39,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1121 places, 3293 transitions, 105473 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:39,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:39,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:43:39,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:46,474 INFO L129 PetriNetUnfolder]: 2416/5871 cut-off events. [2022-07-12 10:43:46,474 INFO L130 PetriNetUnfolder]: For 306475/306475 co-relation queries the response was YES. [2022-07-12 10:43:46,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77311 conditions, 5871 events. 2416/5871 cut-off events. For 306475/306475 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 50954 event pairs, 118 based on Foata normal form. 1/5832 useless extension candidates. Maximal degree in co-relation 77054. Up to 1133 conditions per place. [2022-07-12 10:43:46,622 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1351 selfloop transitions, 1965 changer transitions 17/3372 dead transitions. [2022-07-12 10:43:46,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1168 places, 3372 transitions, 113868 flow [2022-07-12 10:43:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 10:43:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-12 10:43:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2816 transitions. [2022-07-12 10:43:46,625 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107135111689438 [2022-07-12 10:43:46,625 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2816 transitions. [2022-07-12 10:43:46,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2816 transitions. [2022-07-12 10:43:46,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:46,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2816 transitions. [2022-07-12 10:43:46,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.132075471698116) internal successors, (2816), 53 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:46,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:46,630 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:46,630 INFO L186 Difference]: Start difference. First operand has 1121 places, 3293 transitions, 105473 flow. Second operand 53 states and 2816 transitions. [2022-07-12 10:43:46,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1168 places, 3372 transitions, 113868 flow [2022-07-12 10:43:50,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 3372 transitions, 111602 flow, removed 28 selfloop flow, removed 26 redundant places. [2022-07-12 10:43:50,597 INFO L242 Difference]: Finished difference. Result has 1151 places, 3301 transitions, 107867 flow [2022-07-12 10:43:50,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=103216, PETRI_DIFFERENCE_MINUEND_PLACES=1090, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1956, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=107867, PETRI_PLACES=1151, PETRI_TRANSITIONS=3301} [2022-07-12 10:43:50,599 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1074 predicate places. [2022-07-12 10:43:50,599 INFO L495 AbstractCegarLoop]: Abstraction has has 1151 places, 3301 transitions, 107867 flow [2022-07-12 10:43:50,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:50,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:50,600 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] [2022-07-12 10:43:50,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 10:43:50,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:50,814 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:50,814 INFO L85 PathProgramCache]: Analyzing trace with hash -24500895, now seen corresponding path program 22 times [2022-07-12 10:43:50,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:50,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842851860] [2022-07-12 10:43:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:50,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:50,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:50,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842851860] [2022-07-12 10:43:50,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842851860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:50,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874087790] [2022-07-12 10:43:50,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:43:50,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:50,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:50,956 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:50,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 10:43:51,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:43:51,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 10:43:51,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:51,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:51,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874087790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:51,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:51,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-07-12 10:43:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981168644] [2022-07-12 10:43:51,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 10:43:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 10:43:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:43:51,491 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:43:51,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1151 places, 3301 transitions, 107867 flow. Second operand has 30 states, 30 states have (on average 50.833333333333336) internal successors, (1525), 30 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:43:51,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:51,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:43:51,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:04,047 INFO L129 PetriNetUnfolder]: 4290/9853 cut-off events. [2022-07-12 10:44:04,047 INFO L130 PetriNetUnfolder]: For 583891/583891 co-relation queries the response was YES. [2022-07-12 10:44:04,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136240 conditions, 9853 events. 4290/9853 cut-off events. For 583891/583891 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 89925 event pairs, 122 based on Foata normal form. 68/9879 useless extension candidates. Maximal degree in co-relation 135979. Up to 1764 conditions per place. [2022-07-12 10:44:04,412 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1828 selfloop transitions, 4165 changer transitions 35/6067 dead transitions. [2022-07-12 10:44:04,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1238 places, 6067 transitions, 208624 flow [2022-07-12 10:44:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-12 10:44:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-07-12 10:44:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5207 transitions. [2022-07-12 10:44:04,415 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107201501290171 [2022-07-12 10:44:04,415 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5207 transitions. [2022-07-12 10:44:04,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5207 transitions. [2022-07-12 10:44:04,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:04,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5207 transitions. [2022-07-12 10:44:04,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 53.13265306122449) internal successors, (5207), 98 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:04,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:04,424 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:04,424 INFO L186 Difference]: Start difference. First operand has 1151 places, 3301 transitions, 107867 flow. Second operand 98 states and 5207 transitions. [2022-07-12 10:44:04,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1238 places, 6067 transitions, 208624 flow [2022-07-12 10:44:16,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1201 places, 6067 transitions, 202771 flow, removed 31 selfloop flow, removed 37 redundant places. [2022-07-12 10:44:16,679 INFO L242 Difference]: Finished difference. Result has 1249 places, 5730 transitions, 197598 flow [2022-07-12 10:44:16,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=104628, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2026, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=197598, PETRI_PLACES=1249, PETRI_TRANSITIONS=5730} [2022-07-12 10:44:16,682 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1172 predicate places. [2022-07-12 10:44:16,682 INFO L495 AbstractCegarLoop]: Abstraction has has 1249 places, 5730 transitions, 197598 flow [2022-07-12 10:44:16,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 50.833333333333336) internal successors, (1525), 30 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:16,683 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:16,683 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] [2022-07-12 10:44:16,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 10:44:16,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-12 10:44:16,895 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1532947721, now seen corresponding path program 23 times [2022-07-12 10:44:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:16,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020448444] [2022-07-12 10:44:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:17,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020448444] [2022-07-12 10:44:17,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020448444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537930572] [2022-07-12 10:44:17,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:44:17,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:17,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:17,013 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:17,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 10:44:17,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:44:17,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:44:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:44:17,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:17,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:44:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537930572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:17,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:44:17,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-07-12 10:44:17,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462896520] [2022-07-12 10:44:17,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:17,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 10:44:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 10:44:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:44:17,282 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-12 10:44:17,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1249 places, 5730 transitions, 197598 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:17,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:17,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-12 10:44:17,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:40,489 INFO L129 PetriNetUnfolder]: 5527/12313 cut-off events. [2022-07-12 10:44:40,490 INFO L130 PetriNetUnfolder]: For 808410/808410 co-relation queries the response was YES. [2022-07-12 10:44:40,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186611 conditions, 12313 events. 5527/12313 cut-off events. For 808410/808410 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 113687 event pairs, 240 based on Foata normal form. 5/12238 useless extension candidates. Maximal degree in co-relation 186307. Up to 2308 conditions per place. [2022-07-12 10:44:40,902 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 2042 selfloop transitions, 5942 changer transitions 34/8059 dead transitions. [2022-07-12 10:44:40,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 8059 transitions, 292461 flow [2022-07-12 10:44:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 10:44:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-12 10:44:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1785 transitions. [2022-07-12 10:44:40,904 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6411637931034483 [2022-07-12 10:44:40,904 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1785 transitions. [2022-07-12 10:44:40,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1785 transitions. [2022-07-12 10:44:40,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:40,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1785 transitions. [2022-07-12 10:44:40,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.78125) internal successors, (1785), 32 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:40,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:40,907 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:40,907 INFO L186 Difference]: Start difference. First operand has 1249 places, 5730 transitions, 197598 flow. Second operand 32 states and 1785 transitions. [2022-07-12 10:44:40,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 8059 transitions, 292461 flow [2022-07-12 10:45:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1272 places, 8059 transitions, 290962 flow, removed 625 selfloop flow, removed 5 redundant places. [2022-07-12 10:45:09,554 INFO L242 Difference]: Finished difference. Result has 1293 places, 7804 transitions, 286773 flow [2022-07-12 10:45:09,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=196445, PETRI_DIFFERENCE_MINUEND_PLACES=1241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=286773, PETRI_PLACES=1293, PETRI_TRANSITIONS=7804} [2022-07-12 10:45:09,558 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1216 predicate places. [2022-07-12 10:45:09,558 INFO L495 AbstractCegarLoop]: Abstraction has has 1293 places, 7804 transitions, 286773 flow [2022-07-12 10:45:09,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:09,558 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:09,558 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] [2022-07-12 10:45:09,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-12 10:45:09,774 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash 250587137, now seen corresponding path program 24 times [2022-07-12 10:45:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:09,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725822428] [2022-07-12 10:45:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:09,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725822428] [2022-07-12 10:45:09,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725822428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531277763] [2022-07-12 10:45:09,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:45:09,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:09,906 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:09,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 10:45:09,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:45:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:45:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:45:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:10,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:10,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531277763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:10,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:10,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-07-12 10:45:10,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777808644] [2022-07-12 10:45:10,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:10,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:45:10,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:45:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:45:10,501 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-12 10:45:10,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1293 places, 7804 transitions, 286773 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:10,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:10,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-12 10:45:10,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand