./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:10:50,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:10:50,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:10:50,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:10:50,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:10:50,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:10:50,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:10:50,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:10:50,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:10:50,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:10:50,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:10:50,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:10:50,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:10:50,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:10:50,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:10:50,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:10:50,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:10:50,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:10:50,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:10:50,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:10:50,268 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:10:50,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:10:50,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:10:50,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:10:50,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:10:50,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:10:50,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:10:50,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:10:50,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:10:50,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:10:50,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:10:50,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:10:50,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:10:50,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:10:50,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:10:50,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:10:50,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:10:50,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:10:50,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:10:50,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:10:50,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:10:50,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:10:50,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:10:50,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:10:50,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:10:50,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:10:50,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:10:50,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:10:50,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:10:50,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:10:50,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:10:50,300 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:10:50,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:10:50,301 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:10:50,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:10:50,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:10:50,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:10:50,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:10:50,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:10:50,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:10:50,316 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:10:50,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:10:50,316 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:10:50,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:10:50,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:10:50,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:10:50,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:10:50,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:10:50,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:10:50,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:10:50,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:10:50,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:10:50,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:10:50,318 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:10:50,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:10:50,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:10:50,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-07-21 09:10:50,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:10:50,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:10:50,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:10:50,548 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:10:50,549 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:10:50,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-07-21 09:10:50,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86927228a/664936bbae24411fbea3b6c129669d3e/FLAGcd9463a31 [2022-07-21 09:10:50,984 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:10:50,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-07-21 09:10:50,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86927228a/664936bbae24411fbea3b6c129669d3e/FLAGcd9463a31 [2022-07-21 09:10:51,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86927228a/664936bbae24411fbea3b6c129669d3e [2022-07-21 09:10:51,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:10:51,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:10:51,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:10:51,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:10:51,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:10:51,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3784435a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51, skipping insertion in model container [2022-07-21 09:10:51,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:10:51,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:10:51,186 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/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-07-21 09:10:51,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:10:51,219 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:10:51,251 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/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-07-21 09:10:51,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:10:51,268 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:10:51,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51 WrapperNode [2022-07-21 09:10:51,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:10:51,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:10:51,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:10:51,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:10:51,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,317 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-07-21 09:10:51,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:10:51,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:10:51,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:10:51,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:10:51,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:10:51,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:10:51,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:10:51,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:10:51,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (1/1) ... [2022-07-21 09:10:51,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:10:51,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:51,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:10:51,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:10:51,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:10:51,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:10:51,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:10:51,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:10:51,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:10:51,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:10:51,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:10:51,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:10:51,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:10:51,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:10:51,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:10:51,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:10:51,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:10:51,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:10:51,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:10:51,417 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:10:51,508 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:10:51,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:10:51,735 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:10:51,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:10:51,810 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:10:51,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:10:51 BoogieIcfgContainer [2022-07-21 09:10:51,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:10:51,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:10:51,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:10:51,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:10:51,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:10:51" (1/3) ... [2022-07-21 09:10:51,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76770a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:10:51, skipping insertion in model container [2022-07-21 09:10:51,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:51" (2/3) ... [2022-07-21 09:10:51,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76770a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:10:51, skipping insertion in model container [2022-07-21 09:10:51,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:10:51" (3/3) ... [2022-07-21 09:10:51,829 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-07-21 09:10:51,832 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:10:51,837 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:10:51,851 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:10:51,851 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:10:51,903 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:10:51,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2022-07-21 09:10:51,974 INFO L129 PetriNetUnfolder]: 11/143 cut-off events. [2022-07-21 09:10:51,974 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:10:51,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2022-07-21 09:10:51,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2022-07-21 09:10:51,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2022-07-21 09:10:51,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:10:51,993 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@757491f7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70c9b29 [2022-07-21 09:10:51,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:10:52,031 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2022-07-21 09:10:52,040 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:10:52,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:52,041 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:52,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash 956022790, now seen corresponding path program 1 times [2022-07-21 09:10:52,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:52,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889438077] [2022-07-21 09:10:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:52,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:52,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:52,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889438077] [2022-07-21 09:10:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889438077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:52,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:52,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:10:52,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607945353] [2022-07-21 09:10:52,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:52,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:10:52,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:10:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:10:52,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2022-07-21 09:10:52,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:52,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2022-07-21 09:10:52,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:52,371 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2022-07-21 09:10:52,372 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-21 09:10:52,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 160 events. 12/160 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 5 based on Foata normal form. 14/161 useless extension candidates. Maximal degree in co-relation 104. Up to 22 conditions per place. [2022-07-21 09:10:52,375 INFO L132 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2022-07-21 09:10:52,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2022-07-21 09:10:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:10:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:10:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-07-21 09:10:52,389 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2022-07-21 09:10:52,390 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-07-21 09:10:52,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-07-21 09:10:52,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:52,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-07-21 09:10:52,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,401 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,407 INFO L186 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2022-07-21 09:10:52,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2022-07-21 09:10:52,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:10:52,414 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2022-07-21 09:10:52,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2022-07-21 09:10:52,419 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2022-07-21 09:10:52,419 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2022-07-21 09:10:52,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:52,420 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:52,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:10:52,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1538584147, now seen corresponding path program 1 times [2022-07-21 09:10:52,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:52,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515920617] [2022-07-21 09:10:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:52,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:52,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515920617] [2022-07-21 09:10:52,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515920617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:52,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:52,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:10:52,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470267363] [2022-07-21 09:10:52,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:52,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:10:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:52,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:10:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:10:52,602 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2022-07-21 09:10:52,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:52,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2022-07-21 09:10:52,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:52,712 INFO L129 PetriNetUnfolder]: 12/193 cut-off events. [2022-07-21 09:10:52,712 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:10:52,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 193 events. 12/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 277 event pairs, 5 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2022-07-21 09:10:52,714 INFO L132 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2022-07-21 09:10:52,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2022-07-21 09:10:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:10:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:10:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2022-07-21 09:10:52,717 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2022-07-21 09:10:52,717 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2022-07-21 09:10:52,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2022-07-21 09:10:52,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:52,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2022-07-21 09:10:52,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,724 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,724 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2022-07-21 09:10:52,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2022-07-21 09:10:52,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:10:52,729 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2022-07-21 09:10:52,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2022-07-21 09:10:52,730 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2022-07-21 09:10:52,731 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2022-07-21 09:10:52,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,731 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:52,732 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:52,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:10:52,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2022-07-21 09:10:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730880464] [2022-07-21 09:10:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730880464] [2022-07-21 09:10:52,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730880464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:52,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:52,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:10:52,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891268150] [2022-07-21 09:10:52,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:52,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:10:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:10:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:10:52,822 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2022-07-21 09:10:52,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:52,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2022-07-21 09:10:52,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:52,849 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2022-07-21 09:10:52,850 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 09:10:52,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 163 events. 12/163 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 213. Up to 22 conditions per place. [2022-07-21 09:10:52,852 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 11 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2022-07-21 09:10:52,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 313 flow [2022-07-21 09:10:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:10:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:10:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2022-07-21 09:10:52,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2022-07-21 09:10:52,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2022-07-21 09:10:52,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2022-07-21 09:10:52,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:52,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2022-07-21 09:10:52,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,857 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 390 transitions. [2022-07-21 09:10:52,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 313 flow [2022-07-21 09:10:52,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:10:52,861 INFO L242 Difference]: Finished difference. Result has 129 places, 125 transitions, 287 flow [2022-07-21 09:10:52,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2022-07-21 09:10:52,863 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2022-07-21 09:10:52,863 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 287 flow [2022-07-21 09:10:52,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,864 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:52,864 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:52,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:10:52,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1090197722, now seen corresponding path program 2 times [2022-07-21 09:10:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:52,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393644867] [2022-07-21 09:10:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:52,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:53,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:53,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393644867] [2022-07-21 09:10:53,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393644867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:53,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:53,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:53,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537180902] [2022-07-21 09:10:53,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:53,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:53,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:53,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:53,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:53,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 287 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:53,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:53,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:53,632 INFO L129 PetriNetUnfolder]: 120/413 cut-off events. [2022-07-21 09:10:53,633 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-07-21 09:10:53,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 413 events. 120/413 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1605 event pairs, 19 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 800. Up to 174 conditions per place. [2022-07-21 09:10:53,635 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 64 selfloop transitions, 21 changer transitions 6/171 dead transitions. [2022-07-21 09:10:53,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 598 flow [2022-07-21 09:10:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:10:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:10:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1605 transitions. [2022-07-21 09:10:53,639 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6511156186612576 [2022-07-21 09:10:53,639 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1605 transitions. [2022-07-21 09:10:53,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1605 transitions. [2022-07-21 09:10:53,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:53,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1605 transitions. [2022-07-21 09:10:53,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.41176470588235) internal successors, (1605), 17 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,650 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,651 INFO L186 Difference]: Start difference. First operand has 129 places, 125 transitions, 287 flow. Second operand 17 states and 1605 transitions. [2022-07-21 09:10:53,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 598 flow [2022-07-21 09:10:53,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 570 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-07-21 09:10:53,657 INFO L242 Difference]: Finished difference. Result has 151 places, 141 transitions, 391 flow [2022-07-21 09:10:53,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=391, PETRI_PLACES=151, PETRI_TRANSITIONS=141} [2022-07-21 09:10:53,659 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 21 predicate places. [2022-07-21 09:10:53,663 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 141 transitions, 391 flow [2022-07-21 09:10:53,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,664 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:53,664 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:53,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:10:53,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash -190163016, now seen corresponding path program 3 times [2022-07-21 09:10:53,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:53,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362657630] [2022-07-21 09:10:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:53,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:54,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:54,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362657630] [2022-07-21 09:10:54,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362657630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:54,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:54,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:54,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003402183] [2022-07-21 09:10:54,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:54,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:54,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:54,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:54,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 141 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:54,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:54,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:54,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:54,504 INFO L129 PetriNetUnfolder]: 130/473 cut-off events. [2022-07-21 09:10:54,505 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2022-07-21 09:10:54,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 473 events. 130/473 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2193 event pairs, 18 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1051. Up to 172 conditions per place. [2022-07-21 09:10:54,510 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 69 selfloop transitions, 26 changer transitions 6/181 dead transitions. [2022-07-21 09:10:54,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 751 flow [2022-07-21 09:10:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:10:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 09:10:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2022-07-21 09:10:54,519 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-07-21 09:10:54,520 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2022-07-21 09:10:54,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2022-07-21 09:10:54,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:54,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2022-07-21 09:10:54,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:54,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:54,534 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:54,534 INFO L186 Difference]: Start difference. First operand has 151 places, 141 transitions, 391 flow. Second operand 18 states and 1701 transitions. [2022-07-21 09:10:54,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 751 flow [2022-07-21 09:10:54,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 731 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-07-21 09:10:54,541 INFO L242 Difference]: Finished difference. Result has 164 places, 146 transitions, 478 flow [2022-07-21 09:10:54,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=478, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2022-07-21 09:10:54,543 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 34 predicate places. [2022-07-21 09:10:54,544 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 478 flow [2022-07-21 09:10:54,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:54,545 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:54,545 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:54,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:10:54,545 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1275484174, now seen corresponding path program 4 times [2022-07-21 09:10:54,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:54,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439951374] [2022-07-21 09:10:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:54,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439951374] [2022-07-21 09:10:54,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439951374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:54,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:54,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:54,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064843954] [2022-07-21 09:10:54,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:54,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:54,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:54,876 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:54,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 478 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:54,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:54,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:54,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:55,171 INFO L129 PetriNetUnfolder]: 141/517 cut-off events. [2022-07-21 09:10:55,172 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2022-07-21 09:10:55,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 517 events. 141/517 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2510 event pairs, 46 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 1319. Up to 229 conditions per place. [2022-07-21 09:10:55,175 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 29 changer transitions 6/185 dead transitions. [2022-07-21 09:10:55,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 897 flow [2022-07-21 09:10:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:10:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:10:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2022-07-21 09:10:55,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2022-07-21 09:10:55,184 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2022-07-21 09:10:55,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2022-07-21 09:10:55,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:55,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2022-07-21 09:10:55,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,191 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,191 INFO L186 Difference]: Start difference. First operand has 164 places, 146 transitions, 478 flow. Second operand 16 states and 1517 transitions. [2022-07-21 09:10:55,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 897 flow [2022-07-21 09:10:55,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 185 transitions, 809 flow, removed 26 selfloop flow, removed 12 redundant places. [2022-07-21 09:10:55,195 INFO L242 Difference]: Finished difference. Result has 172 places, 158 transitions, 611 flow [2022-07-21 09:10:55,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=611, PETRI_PLACES=172, PETRI_TRANSITIONS=158} [2022-07-21 09:10:55,196 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 42 predicate places. [2022-07-21 09:10:55,196 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 158 transitions, 611 flow [2022-07-21 09:10:55,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:55,197 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:55,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:10:55,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:55,198 INFO L85 PathProgramCache]: Analyzing trace with hash 590353226, now seen corresponding path program 5 times [2022-07-21 09:10:55,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:55,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701784095] [2022-07-21 09:10:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:55,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:55,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:55,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701784095] [2022-07-21 09:10:55,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701784095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:55,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:55,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198410322] [2022-07-21 09:10:55,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:55,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:55,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:55,524 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:55,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 158 transitions, 611 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:55,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:55,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:55,790 INFO L129 PetriNetUnfolder]: 145/538 cut-off events. [2022-07-21 09:10:55,791 INFO L130 PetriNetUnfolder]: For 746/746 co-relation queries the response was YES. [2022-07-21 09:10:55,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 538 events. 145/538 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2727 event pairs, 48 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 1504. Up to 241 conditions per place. [2022-07-21 09:10:55,794 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 74 selfloop transitions, 35 changer transitions 6/195 dead transitions. [2022-07-21 09:10:55,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 195 transitions, 1073 flow [2022-07-21 09:10:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:10:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:10:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2022-07-21 09:10:55,798 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2022-07-21 09:10:55,798 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2022-07-21 09:10:55,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2022-07-21 09:10:55,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:55,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2022-07-21 09:10:55,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,804 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,804 INFO L186 Difference]: Start difference. First operand has 172 places, 158 transitions, 611 flow. Second operand 16 states and 1519 transitions. [2022-07-21 09:10:55,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 195 transitions, 1073 flow [2022-07-21 09:10:55,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 195 transitions, 1012 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-07-21 09:10:55,809 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 811 flow [2022-07-21 09:10:55,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=811, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2022-07-21 09:10:55,810 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 53 predicate places. [2022-07-21 09:10:55,810 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 811 flow [2022-07-21 09:10:55,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:55,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:55,811 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:55,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:10:55,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash -739549564, now seen corresponding path program 6 times [2022-07-21 09:10:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:55,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802949799] [2022-07-21 09:10:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:56,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:56,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802949799] [2022-07-21 09:10:56,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802949799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:56,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:56,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:56,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144528771] [2022-07-21 09:10:56,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:56,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:56,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:56,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:56,098 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:56,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 811 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:56,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:56,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:56,370 INFO L129 PetriNetUnfolder]: 146/545 cut-off events. [2022-07-21 09:10:56,371 INFO L130 PetriNetUnfolder]: For 1213/1213 co-relation queries the response was YES. [2022-07-21 09:10:56,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 545 events. 146/545 cut-off events. For 1213/1213 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2771 event pairs, 43 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 1650. Up to 255 conditions per place. [2022-07-21 09:10:56,374 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 78 selfloop transitions, 30 changer transitions 7/195 dead transitions. [2022-07-21 09:10:56,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 1182 flow [2022-07-21 09:10:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:10:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:10:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2022-07-21 09:10:56,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-07-21 09:10:56,378 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2022-07-21 09:10:56,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2022-07-21 09:10:56,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:56,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2022-07-21 09:10:56,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.5) internal successors, (1512), 16 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,384 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,384 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 811 flow. Second operand 16 states and 1512 transitions. [2022-07-21 09:10:56,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 1182 flow [2022-07-21 09:10:56,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 1101 flow, removed 36 selfloop flow, removed 7 redundant places. [2022-07-21 09:10:56,390 INFO L242 Difference]: Finished difference. Result has 192 places, 173 transitions, 828 flow [2022-07-21 09:10:56,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=192, PETRI_TRANSITIONS=173} [2022-07-21 09:10:56,391 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 62 predicate places. [2022-07-21 09:10:56,391 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 173 transitions, 828 flow [2022-07-21 09:10:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:56,392 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:10:56,393 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1259341386, now seen corresponding path program 7 times [2022-07-21 09:10:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:56,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040022488] [2022-07-21 09:10:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:56,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040022488] [2022-07-21 09:10:56,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040022488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:56,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:56,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:56,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932385739] [2022-07-21 09:10:56,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:56,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:56,709 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:56,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 173 transitions, 828 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:56,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:56,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:56,974 INFO L129 PetriNetUnfolder]: 149/551 cut-off events. [2022-07-21 09:10:56,974 INFO L130 PetriNetUnfolder]: For 1324/1324 co-relation queries the response was YES. [2022-07-21 09:10:56,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1711 conditions, 551 events. 149/551 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2854 event pairs, 45 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 1681. Up to 255 conditions per place. [2022-07-21 09:10:56,978 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 31 changer transitions 6/197 dead transitions. [2022-07-21 09:10:56,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 1208 flow [2022-07-21 09:10:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:10:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:10:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-07-21 09:10:56,982 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-07-21 09:10:56,983 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-07-21 09:10:56,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-07-21 09:10:56,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:56,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-07-21 09:10:56,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,990 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,990 INFO L186 Difference]: Start difference. First operand has 192 places, 173 transitions, 828 flow. Second operand 16 states and 1514 transitions. [2022-07-21 09:10:56,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 1208 flow [2022-07-21 09:10:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1137 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-07-21 09:10:56,997 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 851 flow [2022-07-21 09:10:56,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=851, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2022-07-21 09:10:56,998 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 65 predicate places. [2022-07-21 09:10:56,998 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 851 flow [2022-07-21 09:10:56,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:56,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:56,999 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:10:57,000 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -677590396, now seen corresponding path program 8 times [2022-07-21 09:10:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:57,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86901914] [2022-07-21 09:10:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:57,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86901914] [2022-07-21 09:10:57,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86901914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:57,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:57,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634651692] [2022-07-21 09:10:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:57,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:57,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:57,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:57,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:57,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:57,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:57,654 INFO L129 PetriNetUnfolder]: 153/574 cut-off events. [2022-07-21 09:10:57,654 INFO L130 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2022-07-21 09:10:57,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 574 events. 153/574 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3054 event pairs, 47 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1783. Up to 247 conditions per place. [2022-07-21 09:10:57,657 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 36 changer transitions 6/202 dead transitions. [2022-07-21 09:10:57,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 202 transitions, 1281 flow [2022-07-21 09:10:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:10:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:10:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2022-07-21 09:10:57,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2022-07-21 09:10:57,660 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2022-07-21 09:10:57,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2022-07-21 09:10:57,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:57,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2022-07-21 09:10:57,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.52941176470588) internal successors, (1607), 17 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,665 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,665 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 851 flow. Second operand 17 states and 1607 transitions. [2022-07-21 09:10:57,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 202 transitions, 1281 flow [2022-07-21 09:10:57,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 202 transitions, 1197 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-21 09:10:57,671 INFO L242 Difference]: Finished difference. Result has 200 places, 177 transitions, 904 flow [2022-07-21 09:10:57,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=904, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2022-07-21 09:10:57,672 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2022-07-21 09:10:57,672 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 904 flow [2022-07-21 09:10:57,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,673 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:57,673 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:57,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:10:57,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1724094068, now seen corresponding path program 9 times [2022-07-21 09:10:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:57,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176736987] [2022-07-21 09:10:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:57,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176736987] [2022-07-21 09:10:57,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176736987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:57,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:57,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:57,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879203278] [2022-07-21 09:10:57,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:57,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:57,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:57,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:57,924 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:57,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 904 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:57,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:57,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:57,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:58,231 INFO L129 PetriNetUnfolder]: 154/581 cut-off events. [2022-07-21 09:10:58,231 INFO L130 PetriNetUnfolder]: For 2009/2009 co-relation queries the response was YES. [2022-07-21 09:10:58,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 581 events. 154/581 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3133 event pairs, 53 based on Foata normal form. 1/569 useless extension candidates. Maximal degree in co-relation 1865. Up to 275 conditions per place. [2022-07-21 09:10:58,235 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 83 selfloop transitions, 32 changer transitions 7/202 dead transitions. [2022-07-21 09:10:58,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 202 transitions, 1342 flow [2022-07-21 09:10:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:10:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:10:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-07-21 09:10:58,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-07-21 09:10:58,237 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-07-21 09:10:58,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-07-21 09:10:58,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:58,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-07-21 09:10:58,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,242 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,242 INFO L186 Difference]: Start difference. First operand has 200 places, 177 transitions, 904 flow. Second operand 16 states and 1514 transitions. [2022-07-21 09:10:58,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 202 transitions, 1342 flow [2022-07-21 09:10:58,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 1230 flow, removed 24 selfloop flow, removed 13 redundant places. [2022-07-21 09:10:58,250 INFO L242 Difference]: Finished difference. Result has 203 places, 179 transitions, 917 flow [2022-07-21 09:10:58,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=917, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2022-07-21 09:10:58,251 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 73 predicate places. [2022-07-21 09:10:58,251 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 917 flow [2022-07-21 09:10:58,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:58,252 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:58,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:10:58,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash -861930582, now seen corresponding path program 10 times [2022-07-21 09:10:58,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:58,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840446353] [2022-07-21 09:10:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:58,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:58,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:58,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840446353] [2022-07-21 09:10:58,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840446353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:58,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:58,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:58,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435077555] [2022-07-21 09:10:58,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:58,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:58,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:58,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:58,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:58,561 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:58,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 917 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:58,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:58,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:58,852 INFO L129 PetriNetUnfolder]: 157/584 cut-off events. [2022-07-21 09:10:58,853 INFO L130 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2022-07-21 09:10:58,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 584 events. 157/584 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3162 event pairs, 47 based on Foata normal form. 1/574 useless extension candidates. Maximal degree in co-relation 1876. Up to 275 conditions per place. [2022-07-21 09:10:58,857 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 33 changer transitions 6/204 dead transitions. [2022-07-21 09:10:58,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 1344 flow [2022-07-21 09:10:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:10:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:10:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-07-21 09:10:58,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-07-21 09:10:58,859 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-07-21 09:10:58,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-07-21 09:10:58,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:58,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-07-21 09:10:58,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,864 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,864 INFO L186 Difference]: Start difference. First operand has 203 places, 179 transitions, 917 flow. Second operand 16 states and 1516 transitions. [2022-07-21 09:10:58,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 1344 flow [2022-07-21 09:10:58,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1266 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-07-21 09:10:58,871 INFO L242 Difference]: Finished difference. Result has 206 places, 180 transitions, 941 flow [2022-07-21 09:10:58,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=941, PETRI_PLACES=206, PETRI_TRANSITIONS=180} [2022-07-21 09:10:58,878 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2022-07-21 09:10:58,878 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 180 transitions, 941 flow [2022-07-21 09:10:58,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:58,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:58,879 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 09:10:58,879 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1058454566, now seen corresponding path program 11 times [2022-07-21 09:10:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143613417] [2022-07-21 09:10:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:59,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:59,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143613417] [2022-07-21 09:10:59,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143613417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:59,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:59,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:59,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481154698] [2022-07-21 09:10:59,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:59,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:59,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:59,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:59,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:59,176 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:59,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 180 transitions, 941 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:59,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:59,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:59,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:59,490 INFO L129 PetriNetUnfolder]: 159/598 cut-off events. [2022-07-21 09:10:59,490 INFO L130 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2022-07-21 09:10:59,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 598 events. 159/598 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3280 event pairs, 51 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 1951. Up to 261 conditions per place. [2022-07-21 09:10:59,495 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 39 changer transitions 6/207 dead transitions. [2022-07-21 09:10:59,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 1403 flow [2022-07-21 09:10:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:10:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:10:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2022-07-21 09:10:59,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2022-07-21 09:10:59,497 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2022-07-21 09:10:59,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2022-07-21 09:10:59,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:59,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2022-07-21 09:10:59,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:59,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:59,502 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:59,502 INFO L186 Difference]: Start difference. First operand has 206 places, 180 transitions, 941 flow. Second operand 17 states and 1609 transitions. [2022-07-21 09:10:59,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 1403 flow [2022-07-21 09:10:59,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 207 transitions, 1311 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-07-21 09:10:59,511 INFO L242 Difference]: Finished difference. Result has 210 places, 182 transitions, 982 flow [2022-07-21 09:10:59,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=982, PETRI_PLACES=210, PETRI_TRANSITIONS=182} [2022-07-21 09:10:59,512 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 80 predicate places. [2022-07-21 09:10:59,512 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 182 transitions, 982 flow [2022-07-21 09:10:59,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:59,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:59,513 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 09:10:59,513 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash 789017708, now seen corresponding path program 12 times [2022-07-21 09:10:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570500927] [2022-07-21 09:10:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:59,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570500927] [2022-07-21 09:10:59,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570500927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:59,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:59,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:10:59,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37767174] [2022-07-21 09:10:59,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:59,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:10:59,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:59,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:10:59,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:10:59,744 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:10:59,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 182 transitions, 982 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:59,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:59,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:10:59,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:00,034 INFO L129 PetriNetUnfolder]: 160/599 cut-off events. [2022-07-21 09:11:00,035 INFO L130 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2022-07-21 09:11:00,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2052 conditions, 599 events. 160/599 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3244 event pairs, 79 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 2014. Up to 289 conditions per place. [2022-07-21 09:11:00,039 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 35 changer transitions 7/207 dead transitions. [2022-07-21 09:11:00,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 207 transitions, 1461 flow [2022-07-21 09:11:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:11:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:11:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-07-21 09:11:00,053 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-07-21 09:11:00,053 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-07-21 09:11:00,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-07-21 09:11:00,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:00,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-07-21 09:11:00,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,057 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,057 INFO L186 Difference]: Start difference. First operand has 210 places, 182 transitions, 982 flow. Second operand 16 states and 1516 transitions. [2022-07-21 09:11:00,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 207 transitions, 1461 flow [2022-07-21 09:11:00,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 207 transitions, 1330 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-21 09:11:00,065 INFO L242 Difference]: Finished difference. Result has 212 places, 184 transitions, 987 flow [2022-07-21 09:11:00,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=987, PETRI_PLACES=212, PETRI_TRANSITIONS=184} [2022-07-21 09:11:00,066 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 82 predicate places. [2022-07-21 09:11:00,066 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 184 transitions, 987 flow [2022-07-21 09:11:00,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:00,067 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:00,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:11:00,067 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1447154114, now seen corresponding path program 13 times [2022-07-21 09:11:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331116094] [2022-07-21 09:11:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:00,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:11:00,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:00,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331116094] [2022-07-21 09:11:00,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331116094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:11:00,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:11:00,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 09:11:00,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073062527] [2022-07-21 09:11:00,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:11:00,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:11:00,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:11:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:11:00,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-07-21 09:11:00,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 184 transitions, 987 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:00,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-07-21 09:11:00,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:00,598 INFO L129 PetriNetUnfolder]: 163/605 cut-off events. [2022-07-21 09:11:00,599 INFO L130 PetriNetUnfolder]: For 2717/2717 co-relation queries the response was YES. [2022-07-21 09:11:00,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 605 events. 163/605 cut-off events. For 2717/2717 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3300 event pairs, 82 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2022. Up to 289 conditions per place. [2022-07-21 09:11:00,603 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 87 selfloop transitions, 36 changer transitions 6/209 dead transitions. [2022-07-21 09:11:00,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 1453 flow [2022-07-21 09:11:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:11:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:11:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2022-07-21 09:11:00,605 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2022-07-21 09:11:00,605 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2022-07-21 09:11:00,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2022-07-21 09:11:00,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:00,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2022-07-21 09:11:00,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.875) internal successors, (1518), 16 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,609 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,609 INFO L186 Difference]: Start difference. First operand has 212 places, 184 transitions, 987 flow. Second operand 16 states and 1518 transitions. [2022-07-21 09:11:00,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 1453 flow [2022-07-21 09:11:00,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 209 transitions, 1366 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-07-21 09:11:00,618 INFO L242 Difference]: Finished difference. Result has 215 places, 185 transitions, 1012 flow [2022-07-21 09:11:00,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1012, PETRI_PLACES=215, PETRI_TRANSITIONS=185} [2022-07-21 09:11:00,619 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2022-07-21 09:11:00,619 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 185 transitions, 1012 flow [2022-07-21 09:11:00,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:00,619 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:00,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:11:00,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash -414570916, now seen corresponding path program 1 times [2022-07-21 09:11:00,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:00,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266939572] [2022-07-21 09:11:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:00,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:11:00,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:00,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266939572] [2022-07-21 09:11:00,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266939572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:00,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960467419] [2022-07-21 09:11:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:00,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:00,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:00,662 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) [2022-07-21 09:11:00,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:11:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:11:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:01,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:01,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960467419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:01,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:01,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-07-21 09:11:01,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081745063] [2022-07-21 09:11:01,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:01,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:11:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:01,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:11:01,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:11:01,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 145 [2022-07-21 09:11:01,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 185 transitions, 1012 flow. Second operand has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:01,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:01,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 145 [2022-07-21 09:11:01,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:01,843 INFO L129 PetriNetUnfolder]: 69/767 cut-off events. [2022-07-21 09:11:01,843 INFO L130 PetriNetUnfolder]: For 5719/5871 co-relation queries the response was YES. [2022-07-21 09:11:01,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 767 events. 69/767 cut-off events. For 5719/5871 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5090 event pairs, 8 based on Foata normal form. 96/853 useless extension candidates. Maximal degree in co-relation 2243. Up to 74 conditions per place. [2022-07-21 09:11:01,847 INFO L132 encePairwiseOnDemand]: 129/145 looper letters, 37 selfloop transitions, 23 changer transitions 39/205 dead transitions. [2022-07-21 09:11:01,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 205 transitions, 1189 flow [2022-07-21 09:11:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 09:11:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-21 09:11:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2154 transitions. [2022-07-21 09:11:01,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7818511796733212 [2022-07-21 09:11:01,850 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2154 transitions. [2022-07-21 09:11:01,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2154 transitions. [2022-07-21 09:11:01,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:01,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2154 transitions. [2022-07-21 09:11:01,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.36842105263158) internal successors, (2154), 19 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:01,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:01,855 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:01,855 INFO L186 Difference]: Start difference. First operand has 215 places, 185 transitions, 1012 flow. Second operand 19 states and 2154 transitions. [2022-07-21 09:11:01,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 205 transitions, 1189 flow [2022-07-21 09:11:01,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 205 transitions, 1095 flow, removed 3 selfloop flow, removed 19 redundant places. [2022-07-21 09:11:01,863 INFO L242 Difference]: Finished difference. Result has 217 places, 146 transitions, 631 flow [2022-07-21 09:11:01,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=631, PETRI_PLACES=217, PETRI_TRANSITIONS=146} [2022-07-21 09:11:01,864 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 87 predicate places. [2022-07-21 09:11:01,864 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 146 transitions, 631 flow [2022-07-21 09:11:01,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:01,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:01,865 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:01,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:02,079 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,SelfDestructingSolverStorable15 [2022-07-21 09:11:02,079 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1913345623, now seen corresponding path program 1 times [2022-07-21 09:11:02,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:02,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609034997] [2022-07-21 09:11:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:02,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:02,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609034997] [2022-07-21 09:11:02,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609034997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617992659] [2022-07-21 09:11:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:02,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:02,135 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) [2022-07-21 09:11:02,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:11:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:11:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:02,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:02,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617992659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:02,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:02,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:11:02,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608820149] [2022-07-21 09:11:02,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:02,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:11:02,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:11:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:11:02,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2022-07-21 09:11:02,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 146 transitions, 631 flow. Second operand has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:02,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:02,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2022-07-21 09:11:02,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:02,653 INFO L129 PetriNetUnfolder]: 40/411 cut-off events. [2022-07-21 09:11:02,653 INFO L130 PetriNetUnfolder]: For 2386/2444 co-relation queries the response was YES. [2022-07-21 09:11:02,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 411 events. 40/411 cut-off events. For 2386/2444 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1532 event pairs, 11 based on Foata normal form. 9/413 useless extension candidates. Maximal degree in co-relation 1165. Up to 58 conditions per place. [2022-07-21 09:11:02,656 INFO L132 encePairwiseOnDemand]: 133/145 looper letters, 28 selfloop transitions, 11 changer transitions 6/153 dead transitions. [2022-07-21 09:11:02,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 153 transitions, 742 flow [2022-07-21 09:11:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:11:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:11:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2022-07-21 09:11:02,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-07-21 09:11:02,664 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2022-07-21 09:11:02,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2022-07-21 09:11:02,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:02,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2022-07-21 09:11:02,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:02,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:02,668 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:02,668 INFO L186 Difference]: Start difference. First operand has 217 places, 146 transitions, 631 flow. Second operand 12 states and 1385 transitions. [2022-07-21 09:11:02,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 153 transitions, 742 flow [2022-07-21 09:11:02,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 153 transitions, 575 flow, removed 62 selfloop flow, removed 31 redundant places. [2022-07-21 09:11:02,673 INFO L242 Difference]: Finished difference. Result has 168 places, 143 transitions, 476 flow [2022-07-21 09:11:02,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=476, PETRI_PLACES=168, PETRI_TRANSITIONS=143} [2022-07-21 09:11:02,673 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 38 predicate places. [2022-07-21 09:11:02,673 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 143 transitions, 476 flow [2022-07-21 09:11:02,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:02,674 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:02,674 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:02,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:02,883 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,SelfDestructingSolverStorable16 [2022-07-21 09:11:02,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1401002454, now seen corresponding path program 2 times [2022-07-21 09:11:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:02,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273840090] [2022-07-21 09:11:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:03,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273840090] [2022-07-21 09:11:03,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273840090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104799431] [2022-07-21 09:11:03,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:11:03,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:03,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:03,309 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) [2022-07-21 09:11:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:11:03,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:11:03,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:03,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 09:11:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:03,893 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-21 09:11:03,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-21 09:11:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:03,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:04,051 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:11:04,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-21 09:11:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:04,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104799431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:04,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:04,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 44 [2022-07-21 09:11:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135010101] [2022-07-21 09:11:04,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:04,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 09:11:04,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 09:11:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 09:11:04,543 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2022-07-21 09:11:04,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 143 transitions, 476 flow. Second operand has 44 states, 44 states have (on average 76.47727272727273) internal successors, (3365), 44 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:04,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:04,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2022-07-21 09:11:04,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:07,141 INFO L129 PetriNetUnfolder]: 986/3457 cut-off events. [2022-07-21 09:11:07,141 INFO L130 PetriNetUnfolder]: For 3754/3882 co-relation queries the response was YES. [2022-07-21 09:11:07,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8014 conditions, 3457 events. 986/3457 cut-off events. For 3754/3882 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 31081 event pairs, 142 based on Foata normal form. 56/3287 useless extension candidates. Maximal degree in co-relation 7994. Up to 434 conditions per place. [2022-07-21 09:11:07,162 INFO L132 encePairwiseOnDemand]: 113/145 looper letters, 267 selfloop transitions, 121 changer transitions 0/459 dead transitions. [2022-07-21 09:11:07,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 459 transitions, 2504 flow [2022-07-21 09:11:07,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 09:11:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-21 09:11:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4145 transitions. [2022-07-21 09:11:07,165 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5497347480106101 [2022-07-21 09:11:07,165 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4145 transitions. [2022-07-21 09:11:07,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4145 transitions. [2022-07-21 09:11:07,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:07,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4145 transitions. [2022-07-21 09:11:07,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 79.71153846153847) internal successors, (4145), 52 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:07,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:07,177 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:07,177 INFO L186 Difference]: Start difference. First operand has 168 places, 143 transitions, 476 flow. Second operand 52 states and 4145 transitions. [2022-07-21 09:11:07,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 459 transitions, 2504 flow [2022-07-21 09:11:07,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 459 transitions, 2410 flow, removed 34 selfloop flow, removed 10 redundant places. [2022-07-21 09:11:07,214 INFO L242 Difference]: Finished difference. Result has 229 places, 271 transitions, 1658 flow [2022-07-21 09:11:07,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1658, PETRI_PLACES=229, PETRI_TRANSITIONS=271} [2022-07-21 09:11:07,215 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 99 predicate places. [2022-07-21 09:11:07,215 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 271 transitions, 1658 flow [2022-07-21 09:11:07,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.47727272727273) internal successors, (3365), 44 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:07,216 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:07,216 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:07,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:07,416 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,SelfDestructingSolverStorable17 [2022-07-21 09:11:07,417 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:07,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:07,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1534631996, now seen corresponding path program 3 times [2022-07-21 09:11:07,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:07,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452457702] [2022-07-21 09:11:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:07,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:07,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452457702] [2022-07-21 09:11:07,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452457702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:07,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880333534] [2022-07-21 09:11:07,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:11:07,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:07,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:07,738 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) [2022-07-21 09:11:07,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:11:07,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:11:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:11:07,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:08,076 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:11:08,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-21 09:11:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:11:08,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:08,134 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:11:08,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-21 09:11:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:11:08,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880333534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:08,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:08,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 22 [2022-07-21 09:11:08,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648486860] [2022-07-21 09:11:08,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:08,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:11:08,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:11:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:11:08,264 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-07-21 09:11:08,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 271 transitions, 1658 flow. Second operand has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:08,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:08,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-07-21 09:11:08,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:09,341 INFO L129 PetriNetUnfolder]: 1291/4318 cut-off events. [2022-07-21 09:11:09,341 INFO L130 PetriNetUnfolder]: For 13367/13925 co-relation queries the response was YES. [2022-07-21 09:11:09,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12643 conditions, 4318 events. 1291/4318 cut-off events. For 13367/13925 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 40804 event pairs, 278 based on Foata normal form. 174/4266 useless extension candidates. Maximal degree in co-relation 12599. Up to 1358 conditions per place. [2022-07-21 09:11:09,375 INFO L132 encePairwiseOnDemand]: 121/145 looper letters, 211 selfloop transitions, 99 changer transitions 0/395 dead transitions. [2022-07-21 09:11:09,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 395 transitions, 3255 flow [2022-07-21 09:11:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:11:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-21 09:11:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2685 transitions. [2022-07-21 09:11:09,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6613300492610837 [2022-07-21 09:11:09,378 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2685 transitions. [2022-07-21 09:11:09,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2685 transitions. [2022-07-21 09:11:09,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:09,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2685 transitions. [2022-07-21 09:11:09,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 95.89285714285714) internal successors, (2685), 28 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:09,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:09,384 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:09,384 INFO L186 Difference]: Start difference. First operand has 229 places, 271 transitions, 1658 flow. Second operand 28 states and 2685 transitions. [2022-07-21 09:11:09,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 395 transitions, 3255 flow [2022-07-21 09:11:09,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 395 transitions, 2929 flow, removed 145 selfloop flow, removed 15 redundant places. [2022-07-21 09:11:09,466 INFO L242 Difference]: Finished difference. Result has 249 places, 328 transitions, 2281 flow [2022-07-21 09:11:09,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2281, PETRI_PLACES=249, PETRI_TRANSITIONS=328} [2022-07-21 09:11:09,467 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 119 predicate places. [2022-07-21 09:11:09,467 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 328 transitions, 2281 flow [2022-07-21 09:11:09,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:09,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:09,468 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:09,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:09,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:09,684 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash -425803110, now seen corresponding path program 4 times [2022-07-21 09:11:09,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:09,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602398675] [2022-07-21 09:11:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:09,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:10,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:10,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602398675] [2022-07-21 09:11:10,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602398675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:10,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725624370] [2022-07-21 09:11:10,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:11:10,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:10,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:10,019 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) [2022-07-21 09:11:10,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:11:10,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:11:10,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 09:11:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:10,666 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-21 09:11:10,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-21 09:11:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:10,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:10,777 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:11:10,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-21 09:11:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:11,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725624370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:11,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:11,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 41 [2022-07-21 09:11:11,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040900960] [2022-07-21 09:11:11,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:11,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 09:11:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:11,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 09:11:11,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 09:11:11,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-07-21 09:11:11,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 328 transitions, 2281 flow. Second operand has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:11,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:11,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-07-21 09:11:11,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:13,842 INFO L129 PetriNetUnfolder]: 1750/5923 cut-off events. [2022-07-21 09:11:13,843 INFO L130 PetriNetUnfolder]: For 24663/25289 co-relation queries the response was YES. [2022-07-21 09:11:13,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19554 conditions, 5923 events. 1750/5923 cut-off events. For 24663/25289 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 57610 event pairs, 236 based on Foata normal form. 263/5901 useless extension candidates. Maximal degree in co-relation 19504. Up to 799 conditions per place. [2022-07-21 09:11:13,893 INFO L132 encePairwiseOnDemand]: 116/145 looper letters, 258 selfloop transitions, 271 changer transitions 3/617 dead transitions. [2022-07-21 09:11:13,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 617 transitions, 5886 flow [2022-07-21 09:11:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 09:11:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-21 09:11:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4750 transitions. [2022-07-21 09:11:13,897 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6685432793807178 [2022-07-21 09:11:13,898 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4750 transitions. [2022-07-21 09:11:13,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4750 transitions. [2022-07-21 09:11:13,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:13,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4750 transitions. [2022-07-21 09:11:13,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 96.93877551020408) internal successors, (4750), 49 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:13,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:13,909 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:13,909 INFO L186 Difference]: Start difference. First operand has 249 places, 328 transitions, 2281 flow. Second operand 49 states and 4750 transitions. [2022-07-21 09:11:13,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 617 transitions, 5886 flow [2022-07-21 09:11:13,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 617 transitions, 5793 flow, removed 27 selfloop flow, removed 18 redundant places. [2022-07-21 09:11:13,976 INFO L242 Difference]: Finished difference. Result has 293 places, 473 transitions, 4512 flow [2022-07-21 09:11:13,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4512, PETRI_PLACES=293, PETRI_TRANSITIONS=473} [2022-07-21 09:11:13,977 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 163 predicate places. [2022-07-21 09:11:13,977 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 473 transitions, 4512 flow [2022-07-21 09:11:13,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 94.0) internal successors, (3854), 41 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:13,978 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:13,978 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:13,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 09:11:14,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:14,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1035882360, now seen corresponding path program 5 times [2022-07-21 09:11:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:14,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104047774] [2022-07-21 09:11:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:14,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:14,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104047774] [2022-07-21 09:11:14,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104047774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:14,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984888711] [2022-07-21 09:11:14,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:11:14,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:14,664 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) [2022-07-21 09:11:14,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:11:14,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:11:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 09:11:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:14,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:11:14,994 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:11:14,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:11:15,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:11:15,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:11:15,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:11:15,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-21 09:11:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:15,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:16,448 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:16,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-07-21 09:11:16,457 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:11:16,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 136 [2022-07-21 09:11:16,464 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:11:16,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 105 [2022-07-21 09:11:16,470 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:11:16,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-07-21 09:11:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984888711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:16,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:16,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 58 [2022-07-21 09:11:16,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314289469] [2022-07-21 09:11:16,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:16,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 09:11:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 09:11:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2694, Unknown=43, NotChecked=0, Total=3306 [2022-07-21 09:11:17,002 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 145 [2022-07-21 09:11:17,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 473 transitions, 4512 flow. Second operand has 58 states, 58 states have (on average 83.32758620689656) internal successors, (4833), 58 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:17,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:17,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 145 [2022-07-21 09:11:17,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:21,447 INFO L129 PetriNetUnfolder]: 2786/9128 cut-off events. [2022-07-21 09:11:21,447 INFO L130 PetriNetUnfolder]: For 61556/62973 co-relation queries the response was YES. [2022-07-21 09:11:21,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35117 conditions, 9128 events. 2786/9128 cut-off events. For 61556/62973 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 93699 event pairs, 732 based on Foata normal form. 602/9130 useless extension candidates. Maximal degree in co-relation 35051. Up to 1303 conditions per place. [2022-07-21 09:11:21,549 INFO L132 encePairwiseOnDemand]: 118/145 looper letters, 483 selfloop transitions, 260 changer transitions 0/822 dead transitions. [2022-07-21 09:11:21,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 822 transitions, 9773 flow [2022-07-21 09:11:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 09:11:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-21 09:11:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5241 transitions. [2022-07-21 09:11:21,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5925381571509327 [2022-07-21 09:11:21,554 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5241 transitions. [2022-07-21 09:11:21,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5241 transitions. [2022-07-21 09:11:21,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:21,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5241 transitions. [2022-07-21 09:11:21,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 85.91803278688525) internal successors, (5241), 61 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:21,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 145.0) internal successors, (8990), 62 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:21,568 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 145.0) internal successors, (8990), 62 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:21,568 INFO L186 Difference]: Start difference. First operand has 293 places, 473 transitions, 4512 flow. Second operand 61 states and 5241 transitions. [2022-07-21 09:11:21,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 822 transitions, 9773 flow [2022-07-21 09:11:21,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 822 transitions, 9306 flow, removed 169 selfloop flow, removed 25 redundant places. [2022-07-21 09:11:21,840 INFO L242 Difference]: Finished difference. Result has 347 places, 575 transitions, 6478 flow [2022-07-21 09:11:21,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6478, PETRI_PLACES=347, PETRI_TRANSITIONS=575} [2022-07-21 09:11:21,841 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 217 predicate places. [2022-07-21 09:11:21,841 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 575 transitions, 6478 flow [2022-07-21 09:11:21,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 83.32758620689656) internal successors, (4833), 58 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:21,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:21,842 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:21,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:22,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:22,043 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1182492120, now seen corresponding path program 6 times [2022-07-21 09:11:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357214145] [2022-07-21 09:11:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:22,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:22,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357214145] [2022-07-21 09:11:22,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357214145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:22,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813082333] [2022-07-21 09:11:22,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:11:22,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:22,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:22,758 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) [2022-07-21 09:11:22,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:11:22,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:11:22,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:22,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:11:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:23,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 09:11:23,663 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-21 09:11:23,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-21 09:11:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:23,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:23,938 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:23,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:11:23,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-21 09:11:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:24,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813082333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:24,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:24,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 21] total 63 [2022-07-21 09:11:24,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023276333] [2022-07-21 09:11:24,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:24,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 09:11:24,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:24,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 09:11:24,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3542, Unknown=2, NotChecked=0, Total=3906 [2022-07-21 09:11:24,923 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2022-07-21 09:11:24,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 575 transitions, 6478 flow. Second operand has 63 states, 63 states have (on average 61.98412698412698) internal successors, (3905), 63 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:24,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:24,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2022-07-21 09:11:24,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:29,492 INFO L129 PetriNetUnfolder]: 3470/8565 cut-off events. [2022-07-21 09:11:29,492 INFO L130 PetriNetUnfolder]: For 74613/74703 co-relation queries the response was YES. [2022-07-21 09:11:29,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37234 conditions, 8565 events. 3470/8565 cut-off events. For 74613/74703 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 77287 event pairs, 880 based on Foata normal form. 263/8623 useless extension candidates. Maximal degree in co-relation 37151. Up to 1285 conditions per place. [2022-07-21 09:11:29,571 INFO L132 encePairwiseOnDemand]: 116/145 looper letters, 369 selfloop transitions, 164 changer transitions 48/637 dead transitions. [2022-07-21 09:11:29,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 637 transitions, 7108 flow [2022-07-21 09:11:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 09:11:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-21 09:11:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3083 transitions. [2022-07-21 09:11:29,574 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4523844460748349 [2022-07-21 09:11:29,574 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3083 transitions. [2022-07-21 09:11:29,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3083 transitions. [2022-07-21 09:11:29,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:29,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3083 transitions. [2022-07-21 09:11:29,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 65.59574468085107) internal successors, (3083), 47 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:29,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:29,581 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:29,581 INFO L186 Difference]: Start difference. First operand has 347 places, 575 transitions, 6478 flow. Second operand 47 states and 3083 transitions. [2022-07-21 09:11:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 637 transitions, 7108 flow [2022-07-21 09:11:29,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 637 transitions, 6646 flow, removed 140 selfloop flow, removed 47 redundant places. [2022-07-21 09:11:29,855 INFO L242 Difference]: Finished difference. Result has 350 places, 414 transitions, 4530 flow [2022-07-21 09:11:29,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4530, PETRI_PLACES=350, PETRI_TRANSITIONS=414} [2022-07-21 09:11:29,856 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 220 predicate places. [2022-07-21 09:11:29,856 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 414 transitions, 4530 flow [2022-07-21 09:11:29,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 61.98412698412698) internal successors, (3905), 63 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:29,857 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:29,857 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:29,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 09:11:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:30,057 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:30,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:30,058 INFO L85 PathProgramCache]: Analyzing trace with hash 527677660, now seen corresponding path program 7 times [2022-07-21 09:11:30,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:30,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672577483] [2022-07-21 09:11:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:30,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:30,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672577483] [2022-07-21 09:11:30,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672577483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:30,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775712050] [2022-07-21 09:11:30,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:11:30,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:30,571 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) [2022-07-21 09:11:30,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:11:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 09:11:30,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:30,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:11:30,801 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:11:30,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:11:31,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:11:31,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-21 09:11:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:31,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:31,635 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:31,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:11:31,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-21 09:11:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:32,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775712050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:32,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:32,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2022-07-21 09:11:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104831673] [2022-07-21 09:11:32,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:32,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 09:11:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 09:11:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3028, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 09:11:32,635 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2022-07-21 09:11:32,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 414 transitions, 4530 flow. Second operand has 58 states, 58 states have (on average 84.32758620689656) internal successors, (4891), 58 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:32,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:32,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2022-07-21 09:11:32,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:38,293 INFO L129 PetriNetUnfolder]: 1582/5685 cut-off events. [2022-07-21 09:11:38,293 INFO L130 PetriNetUnfolder]: For 58594/59134 co-relation queries the response was YES. [2022-07-21 09:11:38,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 5685 events. 1582/5685 cut-off events. For 58594/59134 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 54641 event pairs, 374 based on Foata normal form. 250/5695 useless extension candidates. Maximal degree in co-relation 25163. Up to 904 conditions per place. [2022-07-21 09:11:38,356 INFO L132 encePairwiseOnDemand]: 117/145 looper letters, 327 selfloop transitions, 242 changer transitions 3/661 dead transitions. [2022-07-21 09:11:38,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 661 transitions, 8676 flow [2022-07-21 09:11:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 09:11:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-21 09:11:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4587 transitions. [2022-07-21 09:11:38,359 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5968770331815224 [2022-07-21 09:11:38,360 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4587 transitions. [2022-07-21 09:11:38,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4587 transitions. [2022-07-21 09:11:38,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:38,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4587 transitions. [2022-07-21 09:11:38,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 86.54716981132076) internal successors, (4587), 53 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:38,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:38,369 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:38,369 INFO L186 Difference]: Start difference. First operand has 350 places, 414 transitions, 4530 flow. Second operand 53 states and 4587 transitions. [2022-07-21 09:11:38,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 661 transitions, 8676 flow [2022-07-21 09:11:38,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 661 transitions, 8421 flow, removed 61 selfloop flow, removed 30 redundant places. [2022-07-21 09:11:38,725 INFO L242 Difference]: Finished difference. Result has 376 places, 497 transitions, 6559 flow [2022-07-21 09:11:38,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6559, PETRI_PLACES=376, PETRI_TRANSITIONS=497} [2022-07-21 09:11:38,726 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 246 predicate places. [2022-07-21 09:11:38,726 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 497 transitions, 6559 flow [2022-07-21 09:11:38,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 84.32758620689656) internal successors, (4891), 58 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:38,727 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:38,727 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:38,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:38,929 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,SelfDestructingSolverStorable22 [2022-07-21 09:11:38,930 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1646386628, now seen corresponding path program 8 times [2022-07-21 09:11:38,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:38,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46026549] [2022-07-21 09:11:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:39,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:39,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46026549] [2022-07-21 09:11:39,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46026549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:39,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795929528] [2022-07-21 09:11:39,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:11:39,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:39,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:39,417 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) [2022-07-21 09:11:39,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:11:39,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:11:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:11:39,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:40,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:40,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 09:11:40,424 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-21 09:11:40,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-21 09:11:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:40,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:40,677 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:40,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:11:40,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-21 09:11:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:41,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795929528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:41,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:41,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 58 [2022-07-21 09:11:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469271780] [2022-07-21 09:11:41,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 09:11:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 09:11:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3056, Unknown=1, NotChecked=0, Total=3306 [2022-07-21 09:11:41,827 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 145 [2022-07-21 09:11:41,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 497 transitions, 6559 flow. Second operand has 58 states, 58 states have (on average 70.79310344827586) internal successors, (4106), 58 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:41,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:41,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 145 [2022-07-21 09:11:41,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:46,160 INFO L129 PetriNetUnfolder]: 1783/6550 cut-off events. [2022-07-21 09:11:46,160 INFO L130 PetriNetUnfolder]: For 78430/79216 co-relation queries the response was YES. [2022-07-21 09:11:46,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30605 conditions, 6550 events. 1783/6550 cut-off events. For 78430/79216 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 65799 event pairs, 394 based on Foata normal form. 387/6645 useless extension candidates. Maximal degree in co-relation 30518. Up to 1210 conditions per place. [2022-07-21 09:11:46,236 INFO L132 encePairwiseOnDemand]: 112/145 looper letters, 276 selfloop transitions, 352 changer transitions 0/706 dead transitions. [2022-07-21 09:11:46,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 706 transitions, 10811 flow [2022-07-21 09:11:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 09:11:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-21 09:11:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3189 transitions. [2022-07-21 09:11:46,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4998432601880878 [2022-07-21 09:11:46,242 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3189 transitions. [2022-07-21 09:11:46,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3189 transitions. [2022-07-21 09:11:46,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:46,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3189 transitions. [2022-07-21 09:11:46,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 72.47727272727273) internal successors, (3189), 44 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:46,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:46,250 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:46,250 INFO L186 Difference]: Start difference. First operand has 376 places, 497 transitions, 6559 flow. Second operand 44 states and 3189 transitions. [2022-07-21 09:11:46,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 706 transitions, 10811 flow [2022-07-21 09:11:46,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 706 transitions, 10533 flow, removed 73 selfloop flow, removed 31 redundant places. [2022-07-21 09:11:46,509 INFO L242 Difference]: Finished difference. Result has 397 places, 603 transitions, 9597 flow [2022-07-21 09:11:46,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9597, PETRI_PLACES=397, PETRI_TRANSITIONS=603} [2022-07-21 09:11:46,510 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 267 predicate places. [2022-07-21 09:11:46,510 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 603 transitions, 9597 flow [2022-07-21 09:11:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 70.79310344827586) internal successors, (4106), 58 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:46,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:46,511 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:46,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:46,725 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,SelfDestructingSolverStorable23 [2022-07-21 09:11:46,726 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:46,726 INFO L85 PathProgramCache]: Analyzing trace with hash -703129418, now seen corresponding path program 9 times [2022-07-21 09:11:46,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:46,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502018957] [2022-07-21 09:11:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:46,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:47,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502018957] [2022-07-21 09:11:47,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502018957] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:47,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081080152] [2022-07-21 09:11:47,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:11:47,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:47,220 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) [2022-07-21 09:11:47,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:11:47,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:11:47,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:47,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:11:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:47,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:47,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:11:47,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-21 09:11:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:11:47,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:47,698 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2022-07-21 09:11:47,733 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:47,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:11:47,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-21 09:11:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-07-21 09:11:48,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081080152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:48,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:48,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 39 [2022-07-21 09:11:48,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875015410] [2022-07-21 09:11:48,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:48,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 09:11:48,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:48,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 09:11:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1303, Unknown=1, NotChecked=72, Total=1482 [2022-07-21 09:11:48,108 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 145 [2022-07-21 09:11:48,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 603 transitions, 9597 flow. Second operand has 39 states, 39 states have (on average 89.1025641025641) internal successors, (3475), 39 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:48,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:48,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 145 [2022-07-21 09:11:48,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:51,481 INFO L129 PetriNetUnfolder]: 1809/6478 cut-off events. [2022-07-21 09:11:51,481 INFO L130 PetriNetUnfolder]: For 102195/103198 co-relation queries the response was YES. [2022-07-21 09:11:51,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33116 conditions, 6478 events. 1809/6478 cut-off events. For 102195/103198 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 64384 event pairs, 518 based on Foata normal form. 548/6712 useless extension candidates. Maximal degree in co-relation 33021. Up to 1081 conditions per place. [2022-07-21 09:11:51,671 INFO L132 encePairwiseOnDemand]: 124/145 looper letters, 328 selfloop transitions, 297 changer transitions 0/717 dead transitions. [2022-07-21 09:11:51,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 717 transitions, 12699 flow [2022-07-21 09:11:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:11:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:11:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3058 transitions. [2022-07-21 09:11:51,685 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6202839756592292 [2022-07-21 09:11:51,685 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3058 transitions. [2022-07-21 09:11:51,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3058 transitions. [2022-07-21 09:11:51,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:51,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3058 transitions. [2022-07-21 09:11:51,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 89.94117647058823) internal successors, (3058), 34 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:51,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:51,699 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:51,699 INFO L186 Difference]: Start difference. First operand has 397 places, 603 transitions, 9597 flow. Second operand 34 states and 3058 transitions. [2022-07-21 09:11:51,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 717 transitions, 12699 flow [2022-07-21 09:11:52,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 717 transitions, 12174 flow, removed 35 selfloop flow, removed 38 redundant places. [2022-07-21 09:11:52,075 INFO L242 Difference]: Finished difference. Result has 393 places, 629 transitions, 10738 flow [2022-07-21 09:11:52,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=9104, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10738, PETRI_PLACES=393, PETRI_TRANSITIONS=629} [2022-07-21 09:11:52,076 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 263 predicate places. [2022-07-21 09:11:52,076 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 629 transitions, 10738 flow [2022-07-21 09:11:52,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 89.1025641025641) internal successors, (3475), 39 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:52,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:52,076 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:52,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:52,283 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,SelfDestructingSolverStorable24 [2022-07-21 09:11:52,284 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:11:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:52,284 INFO L85 PathProgramCache]: Analyzing trace with hash 566654440, now seen corresponding path program 1 times [2022-07-21 09:11:52,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:52,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829354427] [2022-07-21 09:11:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:52,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:53,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829354427] [2022-07-21 09:11:53,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829354427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416909802] [2022-07-21 09:11:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:53,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:53,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:53,960 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) [2022-07-21 09:11:53,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:11:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:54,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 09:11:54,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:55,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-07-21 09:11:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:55,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:56,626 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:56,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-07-21 09:11:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:58,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416909802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:58,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:58,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31, 30] total 95 [2022-07-21 09:11:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262293113] [2022-07-21 09:11:58,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:58,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-21 09:11:58,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-21 09:11:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=8220, Unknown=1, NotChecked=0, Total=8930 [2022-07-21 09:11:58,843 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 145 [2022-07-21 09:11:58,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 629 transitions, 10738 flow. Second operand has 95 states, 95 states have (on average 46.61052631578947) internal successors, (4428), 95 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:58,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:58,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 145 [2022-07-21 09:11:58,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:18,646 INFO L129 PetriNetUnfolder]: 7575/16930 cut-off events. [2022-07-21 09:12:18,646 INFO L130 PetriNetUnfolder]: For 279534/279674 co-relation queries the response was YES. [2022-07-21 09:12:18,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96578 conditions, 16930 events. 7575/16930 cut-off events. For 279534/279674 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 158654 event pairs, 967 based on Foata normal form. 116/16941 useless extension candidates. Maximal degree in co-relation 96483. Up to 5374 conditions per place. [2022-07-21 09:12:18,832 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 574 selfloop transitions, 832 changer transitions 109/1553 dead transitions. [2022-07-21 09:12:18,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1553 transitions, 27300 flow [2022-07-21 09:12:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-21 09:12:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-07-21 09:12:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 5727 transitions. [2022-07-21 09:12:18,837 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.340487514863258 [2022-07-21 09:12:18,837 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 5727 transitions. [2022-07-21 09:12:18,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 5727 transitions. [2022-07-21 09:12:18,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:18,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 5727 transitions. [2022-07-21 09:12:18,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 49.37068965517241) internal successors, (5727), 116 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:18,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 145.0) internal successors, (16965), 117 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:18,858 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 145.0) internal successors, (16965), 117 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:18,858 INFO L186 Difference]: Start difference. First operand has 393 places, 629 transitions, 10738 flow. Second operand 116 states and 5727 transitions. [2022-07-21 09:12:18,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1553 transitions, 27300 flow [2022-07-21 09:12:19,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1553 transitions, 26719 flow, removed 33 selfloop flow, removed 32 redundant places. [2022-07-21 09:12:20,014 INFO L242 Difference]: Finished difference. Result has 520 places, 1096 transitions, 21413 flow [2022-07-21 09:12:20,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=10463, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=21413, PETRI_PLACES=520, PETRI_TRANSITIONS=1096} [2022-07-21 09:12:20,015 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 390 predicate places. [2022-07-21 09:12:20,015 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1096 transitions, 21413 flow [2022-07-21 09:12:20,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 46.61052631578947) internal successors, (4428), 95 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:20,016 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:20,016 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:20,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:12:20,217 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,SelfDestructingSolverStorable25 [2022-07-21 09:12:20,217 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:12:20,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1631453886, now seen corresponding path program 2 times [2022-07-21 09:12:20,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:20,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488737330] [2022-07-21 09:12:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:20,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:21,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:21,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488737330] [2022-07-21 09:12:21,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488737330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:21,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693165707] [2022-07-21 09:12:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:12:21,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:21,391 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) [2022-07-21 09:12:21,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:12:21,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:12:21,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:21,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 09:12:21,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:22,837 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-21 09:12:22,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-21 09:12:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:23,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:24,340 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:12:24,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 09:12:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:25,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693165707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:12:25,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:12:25,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2022-07-21 09:12:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711461559] [2022-07-21 09:12:25,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:12:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-21 09:12:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-21 09:12:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=7140, Unknown=0, NotChecked=0, Total=7832 [2022-07-21 09:12:25,890 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-21 09:12:25,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1096 transitions, 21413 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:25,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:25,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-21 09:12:25,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:42,778 INFO L129 PetriNetUnfolder]: 8335/18192 cut-off events. [2022-07-21 09:12:42,778 INFO L130 PetriNetUnfolder]: For 443139/443359 co-relation queries the response was YES. [2022-07-21 09:12:43,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134157 conditions, 18192 events. 8335/18192 cut-off events. For 443139/443359 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 170946 event pairs, 1966 based on Foata normal form. 133/18146 useless extension candidates. Maximal degree in co-relation 134025. Up to 9806 conditions per place. [2022-07-21 09:12:43,118 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 845 selfloop transitions, 829 changer transitions 20/1740 dead transitions. [2022-07-21 09:12:43,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1740 transitions, 34516 flow [2022-07-21 09:12:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-21 09:12:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-07-21 09:12:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 5908 transitions. [2022-07-21 09:12:43,123 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42442528735632185 [2022-07-21 09:12:43,123 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 5908 transitions. [2022-07-21 09:12:43,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 5908 transitions. [2022-07-21 09:12:43,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:43,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 5908 transitions. [2022-07-21 09:12:43,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 61.541666666666664) internal successors, (5908), 96 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:43,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 145.0) internal successors, (14065), 97 states have internal predecessors, (14065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:43,146 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 145.0) internal successors, (14065), 97 states have internal predecessors, (14065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:43,146 INFO L186 Difference]: Start difference. First operand has 520 places, 1096 transitions, 21413 flow. Second operand 96 states and 5908 transitions. [2022-07-21 09:12:43,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1740 transitions, 34516 flow [2022-07-21 09:12:46,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1740 transitions, 33931 flow, removed 209 selfloop flow, removed 46 redundant places. [2022-07-21 09:12:46,147 INFO L242 Difference]: Finished difference. Result has 570 places, 1371 transitions, 29332 flow [2022-07-21 09:12:46,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=21028, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=29332, PETRI_PLACES=570, PETRI_TRANSITIONS=1371} [2022-07-21 09:12:46,149 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 440 predicate places. [2022-07-21 09:12:46,149 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1371 transitions, 29332 flow [2022-07-21 09:12:46,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:46,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:46,150 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:12:46,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:12:46,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 09:12:46,353 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:12:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash -981436956, now seen corresponding path program 3 times [2022-07-21 09:12:46,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:46,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472778216] [2022-07-21 09:12:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:46,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:47,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472778216] [2022-07-21 09:12:47,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472778216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754327829] [2022-07-21 09:12:47,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:12:47,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:47,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:47,528 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) [2022-07-21 09:12:47,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:12:47,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:12:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 09:12:47,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:48,403 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:12:48,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-21 09:12:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:12:48,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:49,551 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:12:49,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 09:12:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:12:50,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754327829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:12:50,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:12:50,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22, 22] total 71 [2022-07-21 09:12:50,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430588972] [2022-07-21 09:12:50,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:12:50,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-21 09:12:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-21 09:12:50,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2022-07-21 09:12:50,341 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-21 09:12:50,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1371 transitions, 29332 flow. Second operand has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:50,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-21 09:12:50,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:01,242 INFO L129 PetriNetUnfolder]: 9641/21054 cut-off events. [2022-07-21 09:13:01,242 INFO L130 PetriNetUnfolder]: For 550778/550999 co-relation queries the response was YES. [2022-07-21 09:13:01,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160971 conditions, 21054 events. 9641/21054 cut-off events. For 550778/550999 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 202132 event pairs, 3402 based on Foata normal form. 134/20991 useless extension candidates. Maximal degree in co-relation 160834. Up to 14227 conditions per place. [2022-07-21 09:13:01,595 INFO L132 encePairwiseOnDemand]: 106/145 looper letters, 1046 selfloop transitions, 960 changer transitions 11/2063 dead transitions. [2022-07-21 09:13:01,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 2063 transitions, 47324 flow [2022-07-21 09:13:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-21 09:13:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-21 09:13:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3821 transitions. [2022-07-21 09:13:01,598 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.425027808676307 [2022-07-21 09:13:01,598 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3821 transitions. [2022-07-21 09:13:01,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3821 transitions. [2022-07-21 09:13:01,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:01,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3821 transitions. [2022-07-21 09:13:01,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 61.62903225806452) internal successors, (3821), 62 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:01,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:01,607 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 145.0) internal successors, (9135), 63 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:01,607 INFO L186 Difference]: Start difference. First operand has 570 places, 1371 transitions, 29332 flow. Second operand 62 states and 3821 transitions. [2022-07-21 09:13:01,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 2063 transitions, 47324 flow [2022-07-21 09:13:07,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 2063 transitions, 46439 flow, removed 297 selfloop flow, removed 42 redundant places. [2022-07-21 09:13:07,546 INFO L242 Difference]: Finished difference. Result has 604 places, 1837 transitions, 44207 flow [2022-07-21 09:13:07,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=28763, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=44207, PETRI_PLACES=604, PETRI_TRANSITIONS=1837} [2022-07-21 09:13:07,551 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 474 predicate places. [2022-07-21 09:13:07,551 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1837 transitions, 44207 flow [2022-07-21 09:13:07,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:07,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:07,552 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:07,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:07,757 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,SelfDestructingSolverStorable27 [2022-07-21 09:13:07,757 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:07,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1094007968, now seen corresponding path program 4 times [2022-07-21 09:13:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:07,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171617162] [2022-07-21 09:13:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:07,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:09,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171617162] [2022-07-21 09:13:09,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171617162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:09,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435018319] [2022-07-21 09:13:09,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:13:09,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:09,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:09,499 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) [2022-07-21 09:13:09,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:13:09,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:13:09,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:09,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 09:13:09,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:10,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-21 09:13:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:11,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:12,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:13:12,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-21 09:13:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:14,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435018319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:14,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:14,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31, 31] total 96 [2022-07-21 09:13:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344784991] [2022-07-21 09:13:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-21 09:13:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-21 09:13:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=8463, Unknown=0, NotChecked=0, Total=9120 [2022-07-21 09:13:14,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2022-07-21 09:13:14,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1837 transitions, 44207 flow. Second operand has 96 states, 96 states have (on average 49.552083333333336) internal successors, (4757), 96 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:14,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:14,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2022-07-21 09:13:14,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:40,224 INFO L129 PetriNetUnfolder]: 10762/23385 cut-off events. [2022-07-21 09:13:40,224 INFO L130 PetriNetUnfolder]: For 719088/719362 co-relation queries the response was YES. [2022-07-21 09:13:40,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193212 conditions, 23385 events. 10762/23385 cut-off events. For 719088/719362 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 226756 event pairs, 2319 based on Foata normal form. 187/23363 useless extension candidates. Maximal degree in co-relation 193062. Up to 11359 conditions per place. [2022-07-21 09:13:40,759 INFO L132 encePairwiseOnDemand]: 103/145 looper letters, 1090 selfloop transitions, 1384 changer transitions 19/2534 dead transitions. [2022-07-21 09:13:40,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 2534 transitions, 63572 flow [2022-07-21 09:13:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-21 09:13:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-21 09:13:40,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4423 transitions. [2022-07-21 09:13:40,762 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.363136288998358 [2022-07-21 09:13:40,762 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4423 transitions. [2022-07-21 09:13:40,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4423 transitions. [2022-07-21 09:13:40,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:40,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4423 transitions. [2022-07-21 09:13:40,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 52.654761904761905) internal successors, (4423), 84 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:40,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 145.0) internal successors, (12325), 85 states have internal predecessors, (12325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:40,772 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 145.0) internal successors, (12325), 85 states have internal predecessors, (12325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:40,772 INFO L186 Difference]: Start difference. First operand has 604 places, 1837 transitions, 44207 flow. Second operand 84 states and 4423 transitions. [2022-07-21 09:13:40,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 2534 transitions, 63572 flow [2022-07-21 09:13:47,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 2534 transitions, 63078 flow, removed 189 selfloop flow, removed 22 redundant places. [2022-07-21 09:13:47,656 INFO L242 Difference]: Finished difference. Result has 686 places, 2201 transitions, 58637 flow [2022-07-21 09:13:47,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=43790, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=58637, PETRI_PLACES=686, PETRI_TRANSITIONS=2201} [2022-07-21 09:13:47,659 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 556 predicate places. [2022-07-21 09:13:47,659 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 2201 transitions, 58637 flow [2022-07-21 09:13:47,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 49.552083333333336) internal successors, (4757), 96 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:47,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:47,660 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:47,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:47,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:47,865 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:13:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:47,865 INFO L85 PathProgramCache]: Analyzing trace with hash -710578426, now seen corresponding path program 5 times [2022-07-21 09:13:47,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:47,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825215313] [2022-07-21 09:13:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:47,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:48,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825215313] [2022-07-21 09:13:48,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825215313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261940009] [2022-07-21 09:13:48,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:13:49,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:49,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:49,001 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) [2022-07-21 09:13:49,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:13:49,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:13:49,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 09:13:49,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:50,490 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:13:50,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-21 09:13:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:50,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:51,821 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:13:51,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-07-21 09:13:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:53,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261940009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:53,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:53,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 30] total 87 [2022-07-21 09:13:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49237867] [2022-07-21 09:13:53,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-21 09:13:53,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-21 09:13:53,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=6793, Unknown=0, NotChecked=0, Total=7482 [2022-07-21 09:13:53,826 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2022-07-21 09:13:53,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 2201 transitions, 58637 flow. Second operand has 87 states, 87 states have (on average 58.50574712643678) internal successors, (5090), 87 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:53,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2022-07-21 09:13:53,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:14,009 INFO L129 PetriNetUnfolder]: 11832/25644 cut-off events. [2022-07-21 09:14:14,009 INFO L130 PetriNetUnfolder]: For 918813/919135 co-relation queries the response was YES. [2022-07-21 09:14:14,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226604 conditions, 25644 events. 11832/25644 cut-off events. For 918813/919135 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 253616 event pairs, 3706 based on Foata normal form. 170/25564 useless extension candidates. Maximal degree in co-relation 226433. Up to 15955 conditions per place. [2022-07-21 09:14:14,700 INFO L132 encePairwiseOnDemand]: 105/145 looper letters, 1356 selfloop transitions, 1499 changer transitions 16/2917 dead transitions. [2022-07-21 09:14:14,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 2917 transitions, 79673 flow [2022-07-21 09:14:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 09:14:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-21 09:14:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4356 transitions. [2022-07-21 09:14:14,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42311801845556096 [2022-07-21 09:14:14,704 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4356 transitions. [2022-07-21 09:14:14,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4356 transitions. [2022-07-21 09:14:14,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:14,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4356 transitions. [2022-07-21 09:14:14,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 61.352112676056336) internal successors, (4356), 71 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:14,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 145.0) internal successors, (10440), 72 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:14,728 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 145.0) internal successors, (10440), 72 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:14,728 INFO L186 Difference]: Start difference. First operand has 686 places, 2201 transitions, 58637 flow. Second operand 71 states and 4356 transitions. [2022-07-21 09:14:14,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 2917 transitions, 79673 flow [2022-07-21 09:14:24,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 2917 transitions, 78725 flow, removed 115 selfloop flow, removed 50 redundant places. [2022-07-21 09:14:24,258 INFO L242 Difference]: Finished difference. Result has 731 places, 2672 transitions, 76193 flow [2022-07-21 09:14:24,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=57835, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=76193, PETRI_PLACES=731, PETRI_TRANSITIONS=2672} [2022-07-21 09:14:24,260 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 601 predicate places. [2022-07-21 09:14:24,260 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 2672 transitions, 76193 flow [2022-07-21 09:14:24,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 58.50574712643678) internal successors, (5090), 87 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:24,261 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:24,261 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:14:24,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:24,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:24,466 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2086134766, now seen corresponding path program 6 times [2022-07-21 09:14:24,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:24,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514230615] [2022-07-21 09:14:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:24,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:26,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:26,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514230615] [2022-07-21 09:14:26,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514230615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:26,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21962571] [2022-07-21 09:14:26,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:14:26,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:26,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:26,110 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) [2022-07-21 09:14:26,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:14:26,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:14:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:26,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 09:14:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:27,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-21 09:14:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:27,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:29,142 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:29,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2022-07-21 09:14:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:30,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21962571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:30,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:30,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 32, 32] total 98 [2022-07-21 09:14:30,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365969270] [2022-07-21 09:14:30,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:30,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-21 09:14:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-21 09:14:30,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=8806, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 09:14:30,930 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2022-07-21 09:14:30,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 2672 transitions, 76193 flow. Second operand has 98 states, 98 states have (on average 49.5) internal successors, (4851), 98 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:30,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:30,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2022-07-21 09:14:30,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand