./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-proofs-counter-add-4-semi-Q67.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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:41:29,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:41:29,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:41:29,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:41:29,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:41:29,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:41:29,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:41:29,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:41:29,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:41:29,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:41:29,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:41:29,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:41:29,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:41:29,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:41:29,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:41:29,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:41:29,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:41:29,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:41:29,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:41:29,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:41:29,380 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:41:29,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:41:29,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:41:29,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:41:29,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:41:29,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:41:29,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:41:29,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:41:29,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:41:29,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:41:29,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:41:29,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:41:29,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:41:29,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:41:29,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:41:29,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:41:29,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:41:29,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:41:29,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:41:29,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:41:29,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:41:29,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:41:29,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:41:29,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:41:29,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:41:29,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:41:29,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:41:29,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:41:29,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:41:29,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:41:29,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:41:29,411 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:41:29,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:41:29,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:41:29,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:41:29,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:41:29,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:41:29,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:41:29,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:41:29,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:41:29,412 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:41:29,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:41:29,412 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:41:29,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:41:29,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:41:29,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:41:29,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:41:29,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:41:29,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:41:29,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:41:29,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:41:29,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:41:29,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:41:29,415 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:41:29,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:41:29,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:41:29,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2022-07-19 21:41:29,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:41:29,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:41:29,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:41:29,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:41:29,633 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:41:29,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-19 21:41:29,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ef45b15/862d3747bda74e48abf9c99fa9732541/FLAGab5fa1b25 [2022-07-19 21:41:30,036 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:41:30,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-19 21:41:30,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ef45b15/862d3747bda74e48abf9c99fa9732541/FLAGab5fa1b25 [2022-07-19 21:41:30,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ef45b15/862d3747bda74e48abf9c99fa9732541 [2022-07-19 21:41:30,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:41:30,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:41:30,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:41:30,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:41:30,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:41:30,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61042296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30, skipping insertion in model container [2022-07-19 21:41:30,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:41:30,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:41:30,247 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-07-19 21:41:30,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:41:30,260 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:41:30,293 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-07-19 21:41:30,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:41:30,304 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:41:30,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30 WrapperNode [2022-07-19 21:41:30,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:41:30,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:41:30,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:41:30,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:41:30,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,348 INFO L137 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-07-19 21:41:30,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:41:30,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:41:30,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:41:30,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:41:30,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:41:30,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:41:30,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:41:30,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:41:30,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (1/1) ... [2022-07-19 21:41:30,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:41:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:30,419 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) [2022-07-19 21:41:30,430 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 [2022-07-19 21:41:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:41:30,452 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:41:30,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:41:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:41:30,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:41:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:41:30,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:41:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-19 21:41:30,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-19 21:41:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:41:30,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:41:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:41:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:41:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:41:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:41:30,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:41:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:41:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:41:30,455 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:41:30,511 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:41:30,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:41:30,752 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:41:30,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:41:30,842 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 21:41:30,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:41:30 BoogieIcfgContainer [2022-07-19 21:41:30,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:41:30,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:41:30,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:41:30,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:41:30,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:41:30" (1/3) ... [2022-07-19 21:41:30,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f850d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:41:30, skipping insertion in model container [2022-07-19 21:41:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:41:30" (2/3) ... [2022-07-19 21:41:30,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f850d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:41:30, skipping insertion in model container [2022-07-19 21:41:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:41:30" (3/3) ... [2022-07-19 21:41:30,850 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-19 21:41:30,858 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:41:30,869 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:41:30,870 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:41:30,870 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:41:30,948 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:41:30,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 294 flow [2022-07-19 21:41:31,023 INFO L129 PetriNetUnfolder]: 10/127 cut-off events. [2022-07-19 21:41:31,023 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:41:31,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 10/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-07-19 21:41:31,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 294 flow [2022-07-19 21:41:31,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 114 transitions, 252 flow [2022-07-19 21:41:31,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:41:31,042 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@4a20b0dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@622896c1 [2022-07-19 21:41:31,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:41:31,067 INFO L129 PetriNetUnfolder]: 10/113 cut-off events. [2022-07-19 21:41:31,067 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:41:31,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:31,068 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] [2022-07-19 21:41:31,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1136845032, now seen corresponding path program 1 times [2022-07-19 21:41:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:31,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635054194] [2022-07-19 21:41:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:31,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635054194] [2022-07-19 21:41:31,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635054194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:31,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:31,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:41:31,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33681316] [2022-07-19 21:41:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:31,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:41:31,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:41:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:41:31,257 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 131 [2022-07-19 21:41:31,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:31,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 131 [2022-07-19 21:41:31,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:31,307 INFO L129 PetriNetUnfolder]: 16/120 cut-off events. [2022-07-19 21:41:31,307 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:41:31,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 120 events. 16/120 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 18/132 useless extension candidates. Maximal degree in co-relation 98. Up to 25 conditions per place. [2022-07-19 21:41:31,309 INFO L132 encePairwiseOnDemand]: 125/131 looper letters, 12 selfloop transitions, 0 changer transitions 2/108 dead transitions. [2022-07-19 21:41:31,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 264 flow [2022-07-19 21:41:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:41:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:41:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2022-07-19 21:41:31,321 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9236641221374046 [2022-07-19 21:41:31,321 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2022-07-19 21:41:31,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2022-07-19 21:41:31,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:31,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2022-07-19 21:41:31,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,329 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,331 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 252 flow. Second operand 2 states and 242 transitions. [2022-07-19 21:41:31,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 264 flow [2022-07-19 21:41:31,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-19 21:41:31,336 INFO L242 Difference]: Finished difference. Result has 110 places, 106 transitions, 220 flow [2022-07-19 21:41:31,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2022-07-19 21:41:31,340 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2022-07-19 21:41:31,340 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 220 flow [2022-07-19 21:41:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,340 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:31,341 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] [2022-07-19 21:41:31,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:41:31,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:31,342 INFO L85 PathProgramCache]: Analyzing trace with hash 274536458, now seen corresponding path program 1 times [2022-07-19 21:41:31,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:31,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963517153] [2022-07-19 21:41:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:31,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963517153] [2022-07-19 21:41:31,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963517153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:31,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:31,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:41:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90640661] [2022-07-19 21:41:31,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:31,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:41:31,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:41:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:41:31,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-07-19 21:41:31,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:31,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-07-19 21:41:31,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:31,620 INFO L129 PetriNetUnfolder]: 23/173 cut-off events. [2022-07-19 21:41:31,620 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:41:31,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 173 events. 23/173 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 233 event pairs, 0 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 231. Up to 36 conditions per place. [2022-07-19 21:41:31,622 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 25 selfloop transitions, 3 changer transitions 5/118 dead transitions. [2022-07-19 21:41:31,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 317 flow [2022-07-19 21:41:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:41:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:41:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2022-07-19 21:41:31,625 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8259541984732824 [2022-07-19 21:41:31,625 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2022-07-19 21:41:31,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2022-07-19 21:41:31,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:31,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2022-07-19 21:41:31,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,630 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,631 INFO L186 Difference]: Start difference. First operand has 110 places, 106 transitions, 220 flow. Second operand 5 states and 541 transitions. [2022-07-19 21:41:31,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 317 flow [2022-07-19 21:41:31,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 317 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:41:31,633 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 247 flow [2022-07-19 21:41:31,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2022-07-19 21:41:31,634 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -2 predicate places. [2022-07-19 21:41:31,635 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 247 flow [2022-07-19 21:41:31,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:31,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:31,635 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] [2022-07-19 21:41:31,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:41:31,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -575216244, now seen corresponding path program 1 times [2022-07-19 21:41:31,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:31,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806667546] [2022-07-19 21:41:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:31,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806667546] [2022-07-19 21:41:31,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806667546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341856699] [2022-07-19 21:41:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:31,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:31,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:31,933 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) [2022-07-19 21:41:31,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:41:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:32,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:41:32,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341856699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:32,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:41:32,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-19 21:41:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79734934] [2022-07-19 21:41:32,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:41:32,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:41:32,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:41:32,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-19 21:41:32,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 247 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:32,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:32,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-19 21:41:32,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:32,630 INFO L129 PetriNetUnfolder]: 270/677 cut-off events. [2022-07-19 21:41:32,630 INFO L130 PetriNetUnfolder]: For 152/167 co-relation queries the response was YES. [2022-07-19 21:41:32,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 677 events. 270/677 cut-off events. For 152/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2947 event pairs, 86 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1376. Up to 179 conditions per place. [2022-07-19 21:41:32,636 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 56 selfloop transitions, 12 changer transitions 0/144 dead transitions. [2022-07-19 21:41:32,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 497 flow [2022-07-19 21:41:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:41:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:41:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 986 transitions. [2022-07-19 21:41:32,638 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7526717557251908 [2022-07-19 21:41:32,638 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 986 transitions. [2022-07-19 21:41:32,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 986 transitions. [2022-07-19 21:41:32,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:32,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 986 transitions. [2022-07-19 21:41:32,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:32,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:32,644 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:32,644 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 247 flow. Second operand 10 states and 986 transitions. [2022-07-19 21:41:32,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 497 flow [2022-07-19 21:41:32,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 144 transitions, 481 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-19 21:41:32,648 INFO L242 Difference]: Finished difference. Result has 121 places, 115 transitions, 301 flow [2022-07-19 21:41:32,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2022-07-19 21:41:32,649 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 4 predicate places. [2022-07-19 21:41:32,649 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 301 flow [2022-07-19 21:41:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:32,650 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:32,650 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] [2022-07-19 21:41:32,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:32,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:32,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1981692516, now seen corresponding path program 2 times [2022-07-19 21:41:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700398214] [2022-07-19 21:41:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:33,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:33,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700398214] [2022-07-19 21:41:33,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700398214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:33,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218956163] [2022-07-19 21:41:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:33,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:33,014 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) [2022-07-19 21:41:33,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:41:33,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:33,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:33,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:33,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:41:33,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218956163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:33,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:41:33,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-19 21:41:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193878352] [2022-07-19 21:41:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:41:33,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:41:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:41:33,317 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-19 21:41:33,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:33,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:33,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-19 21:41:33,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:33,514 INFO L129 PetriNetUnfolder]: 241/544 cut-off events. [2022-07-19 21:41:33,514 INFO L130 PetriNetUnfolder]: For 205/217 co-relation queries the response was YES. [2022-07-19 21:41:33,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 544 events. 241/544 cut-off events. For 205/217 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2014 event pairs, 59 based on Foata normal form. 5/489 useless extension candidates. Maximal degree in co-relation 1235. Up to 169 conditions per place. [2022-07-19 21:41:33,518 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 47 selfloop transitions, 12 changer transitions 0/135 dead transitions. [2022-07-19 21:41:33,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 480 flow [2022-07-19 21:41:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:41:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:41:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-07-19 21:41:33,521 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7442748091603053 [2022-07-19 21:41:33,521 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-07-19 21:41:33,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-07-19 21:41:33,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:33,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-07-19 21:41:33,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:33,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:33,525 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:33,525 INFO L186 Difference]: Start difference. First operand has 121 places, 115 transitions, 301 flow. Second operand 10 states and 975 transitions. [2022-07-19 21:41:33,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 135 transitions, 480 flow [2022-07-19 21:41:33,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 135 transitions, 473 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:41:33,528 INFO L242 Difference]: Finished difference. Result has 127 places, 114 transitions, 323 flow [2022-07-19 21:41:33,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2022-07-19 21:41:33,529 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 10 predicate places. [2022-07-19 21:41:33,529 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 323 flow [2022-07-19 21:41:33,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:33,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:33,530 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] [2022-07-19 21:41:33,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:33,745 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,SelfDestructingSolverStorable3 [2022-07-19 21:41:33,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:33,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1358218546, now seen corresponding path program 1 times [2022-07-19 21:41:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:33,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853449873] [2022-07-19 21:41:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:33,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853449873] [2022-07-19 21:41:33,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853449873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:33,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:33,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:41:33,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799528533] [2022-07-19 21:41:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:33,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:41:33,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:41:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:41:33,855 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-19 21:41:33,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:33,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:33,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-19 21:41:33,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:34,239 INFO L129 PetriNetUnfolder]: 1833/3130 cut-off events. [2022-07-19 21:41:34,240 INFO L130 PetriNetUnfolder]: For 1785/1842 co-relation queries the response was YES. [2022-07-19 21:41:34,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 3130 events. 1833/3130 cut-off events. For 1785/1842 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18033 event pairs, 320 based on Foata normal form. 13/2625 useless extension candidates. Maximal degree in co-relation 7653. Up to 1083 conditions per place. [2022-07-19 21:41:34,258 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 83 selfloop transitions, 10 changer transitions 2/163 dead transitions. [2022-07-19 21:41:34,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 163 transitions, 682 flow [2022-07-19 21:41:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:41:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:41:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2022-07-19 21:41:34,261 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.726145038167939 [2022-07-19 21:41:34,261 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 761 transitions. [2022-07-19 21:41:34,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 761 transitions. [2022-07-19 21:41:34,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:34,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 761 transitions. [2022-07-19 21:41:34,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:34,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:34,266 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:34,266 INFO L186 Difference]: Start difference. First operand has 127 places, 114 transitions, 323 flow. Second operand 8 states and 761 transitions. [2022-07-19 21:41:34,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 163 transitions, 682 flow [2022-07-19 21:41:34,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 163 transitions, 660 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-07-19 21:41:34,274 INFO L242 Difference]: Finished difference. Result has 130 places, 117 transitions, 357 flow [2022-07-19 21:41:34,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=357, PETRI_PLACES=130, PETRI_TRANSITIONS=117} [2022-07-19 21:41:34,275 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2022-07-19 21:41:34,275 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 117 transitions, 357 flow [2022-07-19 21:41:34,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:34,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:34,276 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] [2022-07-19 21:41:34,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:41:34,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1386724926, now seen corresponding path program 2 times [2022-07-19 21:41:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:34,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246257537] [2022-07-19 21:41:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:34,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:34,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246257537] [2022-07-19 21:41:34,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246257537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:34,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:34,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:41:34,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055957039] [2022-07-19 21:41:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:34,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:41:34,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:41:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:41:34,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-19 21:41:34,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 117 transitions, 357 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:34,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:34,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-19 21:41:34,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:34,998 INFO L129 PetriNetUnfolder]: 1914/3550 cut-off events. [2022-07-19 21:41:34,998 INFO L130 PetriNetUnfolder]: For 3151/3197 co-relation queries the response was YES. [2022-07-19 21:41:35,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8896 conditions, 3550 events. 1914/3550 cut-off events. For 3151/3197 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22689 event pairs, 721 based on Foata normal form. 32/3203 useless extension candidates. Maximal degree in co-relation 8884. Up to 1069 conditions per place. [2022-07-19 21:41:35,020 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 92 selfloop transitions, 12 changer transitions 10/182 dead transitions. [2022-07-19 21:41:35,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 824 flow [2022-07-19 21:41:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:41:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:41:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 946 transitions. [2022-07-19 21:41:35,022 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7221374045801526 [2022-07-19 21:41:35,022 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 946 transitions. [2022-07-19 21:41:35,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 946 transitions. [2022-07-19 21:41:35,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:35,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 946 transitions. [2022-07-19 21:41:35,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.6) internal successors, (946), 10 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,027 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,027 INFO L186 Difference]: Start difference. First operand has 130 places, 117 transitions, 357 flow. Second operand 10 states and 946 transitions. [2022-07-19 21:41:35,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 824 flow [2022-07-19 21:41:35,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 810 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:41:35,032 INFO L242 Difference]: Finished difference. Result has 136 places, 119 transitions, 390 flow [2022-07-19 21:41:35,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=136, PETRI_TRANSITIONS=119} [2022-07-19 21:41:35,033 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2022-07-19 21:41:35,033 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 119 transitions, 390 flow [2022-07-19 21:41:35,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:35,034 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:41:35,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1632214562, now seen corresponding path program 3 times [2022-07-19 21:41:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:35,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355623819] [2022-07-19 21:41:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:35,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355623819] [2022-07-19 21:41:35,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355623819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:35,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:35,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:41:35,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629992899] [2022-07-19 21:41:35,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:35,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:41:35,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:41:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:41:35,155 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-19 21:41:35,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 119 transitions, 390 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:35,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-19 21:41:35,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:35,536 INFO L129 PetriNetUnfolder]: 1433/2624 cut-off events. [2022-07-19 21:41:35,536 INFO L130 PetriNetUnfolder]: For 2756/2756 co-relation queries the response was YES. [2022-07-19 21:41:35,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7160 conditions, 2624 events. 1433/2624 cut-off events. For 2756/2756 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15541 event pairs, 314 based on Foata normal form. 72/2444 useless extension candidates. Maximal degree in co-relation 7146. Up to 1319 conditions per place. [2022-07-19 21:41:35,551 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 63 selfloop transitions, 11 changer transitions 9/151 dead transitions. [2022-07-19 21:41:35,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 151 transitions, 674 flow [2022-07-19 21:41:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:41:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:41:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 834 transitions. [2022-07-19 21:41:35,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7073791348600509 [2022-07-19 21:41:35,554 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 834 transitions. [2022-07-19 21:41:35,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 834 transitions. [2022-07-19 21:41:35,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:35,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 834 transitions. [2022-07-19 21:41:35,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.66666666666667) internal successors, (834), 9 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,558 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,558 INFO L186 Difference]: Start difference. First operand has 136 places, 119 transitions, 390 flow. Second operand 9 states and 834 transitions. [2022-07-19 21:41:35,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 151 transitions, 674 flow [2022-07-19 21:41:35,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 151 transitions, 653 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-07-19 21:41:35,563 INFO L242 Difference]: Finished difference. Result has 138 places, 116 transitions, 373 flow [2022-07-19 21:41:35,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=138, PETRI_TRANSITIONS=116} [2022-07-19 21:41:35,563 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2022-07-19 21:41:35,563 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 116 transitions, 373 flow [2022-07-19 21:41:35,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:35,564 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:35,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:41:35,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -381570272, now seen corresponding path program 1 times [2022-07-19 21:41:35,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651682593] [2022-07-19 21:41:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651682593] [2022-07-19 21:41:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651682593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96836422] [2022-07-19 21:41:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:35,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:35,716 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) [2022-07-19 21:41:35,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:41:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:41:35,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:35,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:35,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96836422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:35,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:35,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-07-19 21:41:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892179738] [2022-07-19 21:41:35,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:41:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:41:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:41:35,958 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-07-19 21:41:35,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 116 transitions, 373 flow. Second operand has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:35,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:35,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-07-19 21:41:35,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:36,790 INFO L129 PetriNetUnfolder]: 4250/7066 cut-off events. [2022-07-19 21:41:36,790 INFO L130 PetriNetUnfolder]: For 8476/8523 co-relation queries the response was YES. [2022-07-19 21:41:36,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19721 conditions, 7066 events. 4250/7066 cut-off events. For 8476/8523 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47320 event pairs, 526 based on Foata normal form. 554/7022 useless extension candidates. Maximal degree in co-relation 19706. Up to 1749 conditions per place. [2022-07-19 21:41:36,837 INFO L132 encePairwiseOnDemand]: 115/131 looper letters, 145 selfloop transitions, 34 changer transitions 8/254 dead transitions. [2022-07-19 21:41:36,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 254 transitions, 1293 flow [2022-07-19 21:41:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:41:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:41:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1598 transitions. [2022-07-19 21:41:36,841 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7175572519083969 [2022-07-19 21:41:36,841 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1598 transitions. [2022-07-19 21:41:36,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1598 transitions. [2022-07-19 21:41:36,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:36,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1598 transitions. [2022-07-19 21:41:36,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.0) internal successors, (1598), 17 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:36,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 131.0) internal successors, (2358), 18 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:36,848 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 131.0) internal successors, (2358), 18 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:36,848 INFO L186 Difference]: Start difference. First operand has 138 places, 116 transitions, 373 flow. Second operand 17 states and 1598 transitions. [2022-07-19 21:41:36,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 254 transitions, 1293 flow [2022-07-19 21:41:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 254 transitions, 1217 flow, removed 15 selfloop flow, removed 11 redundant places. [2022-07-19 21:41:36,860 INFO L242 Difference]: Finished difference. Result has 150 places, 139 transitions, 628 flow [2022-07-19 21:41:36,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=628, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2022-07-19 21:41:36,863 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 33 predicate places. [2022-07-19 21:41:36,863 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 628 flow [2022-07-19 21:41:36,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:36,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:36,864 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] [2022-07-19 21:41:36,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:41:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:37,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1954215548, now seen corresponding path program 1 times [2022-07-19 21:41:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:37,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399024044] [2022-07-19 21:41:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:37,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:37,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399024044] [2022-07-19 21:41:37,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399024044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:37,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133382106] [2022-07-19 21:41:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:37,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:37,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:37,218 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) [2022-07-19 21:41:37,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:41:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:37,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:41:37,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133382106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:37,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:41:37,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-19 21:41:37,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257018061] [2022-07-19 21:41:37,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:37,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:41:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:41:37,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:41:37,606 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-19 21:41:37,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 628 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:37,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:37,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-19 21:41:37,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:38,053 INFO L129 PetriNetUnfolder]: 1788/3775 cut-off events. [2022-07-19 21:41:38,053 INFO L130 PetriNetUnfolder]: For 13246/13426 co-relation queries the response was YES. [2022-07-19 21:41:38,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13082 conditions, 3775 events. 1788/3775 cut-off events. For 13246/13426 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28604 event pairs, 233 based on Foata normal form. 7/3446 useless extension candidates. Maximal degree in co-relation 13060. Up to 1351 conditions per place. [2022-07-19 21:41:38,083 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 108 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2022-07-19 21:41:38,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 1358 flow [2022-07-19 21:41:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:41:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:41:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 883 transitions. [2022-07-19 21:41:38,085 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7489397794741306 [2022-07-19 21:41:38,085 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 883 transitions. [2022-07-19 21:41:38,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 883 transitions. [2022-07-19 21:41:38,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:38,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 883 transitions. [2022-07-19 21:41:38,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.11111111111111) internal successors, (883), 9 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:38,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:38,089 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:38,090 INFO L186 Difference]: Start difference. First operand has 150 places, 139 transitions, 628 flow. Second operand 9 states and 883 transitions. [2022-07-19 21:41:38,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 1358 flow [2022-07-19 21:41:38,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 202 transitions, 1188 flow, removed 66 selfloop flow, removed 11 redundant places. [2022-07-19 21:41:38,103 INFO L242 Difference]: Finished difference. Result has 147 places, 149 transitions, 670 flow [2022-07-19 21:41:38,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=147, PETRI_TRANSITIONS=149} [2022-07-19 21:41:38,104 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 30 predicate places. [2022-07-19 21:41:38,104 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 149 transitions, 670 flow [2022-07-19 21:41:38,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:38,105 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:38,105 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] [2022-07-19 21:41:38,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:38,318 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2147113502, now seen corresponding path program 2 times [2022-07-19 21:41:38,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:38,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264844999] [2022-07-19 21:41:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:38,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:41:38,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:38,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264844999] [2022-07-19 21:41:38,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264844999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:38,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787009873] [2022-07-19 21:41:38,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:38,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:38,491 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) [2022-07-19 21:41:38,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:41:38,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:41:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:41:38,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:41:38,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787009873] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:38,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:41:38,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 22 [2022-07-19 21:41:38,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020238880] [2022-07-19 21:41:38,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:38,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:41:38,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:41:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-07-19 21:41:38,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-19 21:41:38,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 149 transitions, 670 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:38,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:38,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-19 21:41:38,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:39,559 INFO L129 PetriNetUnfolder]: 2488/5379 cut-off events. [2022-07-19 21:41:39,559 INFO L130 PetriNetUnfolder]: For 21866/22027 co-relation queries the response was YES. [2022-07-19 21:41:39,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 5379 events. 2488/5379 cut-off events. For 21866/22027 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42815 event pairs, 354 based on Foata normal form. 26/5220 useless extension candidates. Maximal degree in co-relation 19279. Up to 1207 conditions per place. [2022-07-19 21:41:39,608 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 156 selfloop transitions, 24 changer transitions 0/258 dead transitions. [2022-07-19 21:41:39,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 258 transitions, 1780 flow [2022-07-19 21:41:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:41:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:41:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 994 transitions. [2022-07-19 21:41:39,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587786259541984 [2022-07-19 21:41:39,611 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 994 transitions. [2022-07-19 21:41:39,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 994 transitions. [2022-07-19 21:41:39,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:39,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 994 transitions. [2022-07-19 21:41:39,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:39,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:39,615 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:39,615 INFO L186 Difference]: Start difference. First operand has 147 places, 149 transitions, 670 flow. Second operand 10 states and 994 transitions. [2022-07-19 21:41:39,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 258 transitions, 1780 flow [2022-07-19 21:41:39,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 258 transitions, 1767 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-19 21:41:39,630 INFO L242 Difference]: Finished difference. Result has 155 places, 156 transitions, 779 flow [2022-07-19 21:41:39,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=155, PETRI_TRANSITIONS=156} [2022-07-19 21:41:39,632 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 38 predicate places. [2022-07-19 21:41:39,632 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 156 transitions, 779 flow [2022-07-19 21:41:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:39,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:39,633 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:39,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 21:41:39,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:41:39,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash -562275662, now seen corresponding path program 3 times [2022-07-19 21:41:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:39,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317405923] [2022-07-19 21:41:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:40,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:40,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317405923] [2022-07-19 21:41:40,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317405923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:40,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:40,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:41:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264736315] [2022-07-19 21:41:40,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:40,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:41:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:41:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:41:40,007 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-19 21:41:40,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 156 transitions, 779 flow. Second operand has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:40,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:40,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-19 21:41:40,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:41,242 INFO L129 PetriNetUnfolder]: 6731/11642 cut-off events. [2022-07-19 21:41:41,242 INFO L130 PetriNetUnfolder]: For 39293/39293 co-relation queries the response was YES. [2022-07-19 21:41:41,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43407 conditions, 11642 events. 6731/11642 cut-off events. For 39293/39293 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 86834 event pairs, 2836 based on Foata normal form. 43/11558 useless extension candidates. Maximal degree in co-relation 43383. Up to 7480 conditions per place. [2022-07-19 21:41:41,320 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 103 selfloop transitions, 18 changer transitions 15/204 dead transitions. [2022-07-19 21:41:41,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 204 transitions, 1467 flow [2022-07-19 21:41:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:41:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:41:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 910 transitions. [2022-07-19 21:41:41,322 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6946564885496184 [2022-07-19 21:41:41,322 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 910 transitions. [2022-07-19 21:41:41,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 910 transitions. [2022-07-19 21:41:41,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:41,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 910 transitions. [2022-07-19 21:41:41,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,327 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,327 INFO L186 Difference]: Start difference. First operand has 155 places, 156 transitions, 779 flow. Second operand 10 states and 910 transitions. [2022-07-19 21:41:41,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 204 transitions, 1467 flow [2022-07-19 21:41:41,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 1435 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-07-19 21:41:41,381 INFO L242 Difference]: Finished difference. Result has 159 places, 159 transitions, 859 flow [2022-07-19 21:41:41,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=859, PETRI_PLACES=159, PETRI_TRANSITIONS=159} [2022-07-19 21:41:41,382 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 42 predicate places. [2022-07-19 21:41:41,382 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 159 transitions, 859 flow [2022-07-19 21:41:41,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,383 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:41,383 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] [2022-07-19 21:41:41,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:41:41,383 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1797479770, now seen corresponding path program 1 times [2022-07-19 21:41:41,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:41,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468603086] [2022-07-19 21:41:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:41,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:41,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:41,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468603086] [2022-07-19 21:41:41,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468603086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:41,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770233599] [2022-07-19 21:41:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:41,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:41,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:41,458 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) [2022-07-19 21:41:41,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:41:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:41,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:41:41,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:41,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:41,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770233599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:41,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:41,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-07-19 21:41:41,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363402306] [2022-07-19 21:41:41,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:41,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:41:41,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:41:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:41:41,764 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-07-19 21:41:41,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 159 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:41,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:41,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-07-19 21:41:41,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:42,300 INFO L129 PetriNetUnfolder]: 1565/4801 cut-off events. [2022-07-19 21:41:42,300 INFO L130 PetriNetUnfolder]: For 31934/32370 co-relation queries the response was YES. [2022-07-19 21:41:42,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17842 conditions, 4801 events. 1565/4801 cut-off events. For 31934/32370 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46180 event pairs, 216 based on Foata normal form. 174/4821 useless extension candidates. Maximal degree in co-relation 17817. Up to 1194 conditions per place. [2022-07-19 21:41:42,345 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 59 selfloop transitions, 67 changer transitions 4/226 dead transitions. [2022-07-19 21:41:42,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 226 transitions, 1637 flow [2022-07-19 21:41:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:41:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:41:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-07-19 21:41:42,347 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8429661941112323 [2022-07-19 21:41:42,347 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-07-19 21:41:42,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-07-19 21:41:42,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:42,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-07-19 21:41:42,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,351 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,351 INFO L186 Difference]: Start difference. First operand has 159 places, 159 transitions, 859 flow. Second operand 7 states and 773 transitions. [2022-07-19 21:41:42,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 226 transitions, 1637 flow [2022-07-19 21:41:42,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 1607 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-19 21:41:42,366 INFO L242 Difference]: Finished difference. Result has 161 places, 194 transitions, 1493 flow [2022-07-19 21:41:42,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1493, PETRI_PLACES=161, PETRI_TRANSITIONS=194} [2022-07-19 21:41:42,367 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 44 predicate places. [2022-07-19 21:41:42,367 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 194 transitions, 1493 flow [2022-07-19 21:41:42,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:42,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:42,368 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:41:42,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:42,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:42,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:42,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1189485944, now seen corresponding path program 2 times [2022-07-19 21:41:42,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:42,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259380416] [2022-07-19 21:41:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:42,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:42,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259380416] [2022-07-19 21:41:42,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259380416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:42,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429384736] [2022-07-19 21:41:42,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:42,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:42,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:42,740 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) [2022-07-19 21:41:42,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:41:42,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:42,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:41:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:43,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:43,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429384736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:43,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:43,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-19 21:41:43,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421421825] [2022-07-19 21:41:43,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:43,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:41:43,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:41:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:41:43,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-19 21:41:43,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 194 transitions, 1493 flow. Second operand has 24 states, 24 states have (on average 87.83333333333333) internal successors, (2108), 24 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:43,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:43,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-19 21:41:43,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:51,462 INFO L129 PetriNetUnfolder]: 40001/70006 cut-off events. [2022-07-19 21:41:51,462 INFO L130 PetriNetUnfolder]: For 398299/398495 co-relation queries the response was YES. [2022-07-19 21:41:51,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285840 conditions, 70006 events. 40001/70006 cut-off events. For 398299/398495 co-relation queries the response was YES. Maximal size of possible extension queue 4215. Compared 693294 event pairs, 7304 based on Foata normal form. 3125/72302 useless extension candidates. Maximal degree in co-relation 285812. Up to 11334 conditions per place. [2022-07-19 21:41:52,256 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 642 selfloop transitions, 150 changer transitions 0/860 dead transitions. [2022-07-19 21:41:52,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 860 transitions, 10217 flow [2022-07-19 21:41:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:41:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:41:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2303 transitions. [2022-07-19 21:41:52,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7325063613231552 [2022-07-19 21:41:52,260 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2303 transitions. [2022-07-19 21:41:52,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2303 transitions. [2022-07-19 21:41:52,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:52,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2303 transitions. [2022-07-19 21:41:52,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 95.95833333333333) internal successors, (2303), 24 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:52,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:52,272 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:52,272 INFO L186 Difference]: Start difference. First operand has 161 places, 194 transitions, 1493 flow. Second operand 24 states and 2303 transitions. [2022-07-19 21:41:52,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 860 transitions, 10217 flow [2022-07-19 21:41:53,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 860 transitions, 9232 flow, removed 481 selfloop flow, removed 3 redundant places. [2022-07-19 21:41:53,115 INFO L242 Difference]: Finished difference. Result has 194 places, 308 transitions, 3242 flow [2022-07-19 21:41:53,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3242, PETRI_PLACES=194, PETRI_TRANSITIONS=308} [2022-07-19 21:41:53,116 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 77 predicate places. [2022-07-19 21:41:53,116 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 308 transitions, 3242 flow [2022-07-19 21:41:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.83333333333333) internal successors, (2108), 24 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:53,117 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:53,117 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:41:53,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:53,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:53,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:41:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1361124138, now seen corresponding path program 3 times [2022-07-19 21:41:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:53,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789376674] [2022-07-19 21:41:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:53,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789376674] [2022-07-19 21:41:53,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789376674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264455017] [2022-07-19 21:41:53,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:41:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:53,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:53,486 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) [2022-07-19 21:41:53,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:41:53,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:41:53,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:41:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:53,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:41:54,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264455017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:54,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:54,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-19 21:41:54,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500960639] [2022-07-19 21:41:54,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:54,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:41:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:41:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:41:54,214 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-07-19 21:41:54,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 308 transitions, 3242 flow. Second operand has 24 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:54,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:54,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-07-19 21:41:54,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:11,488 INFO L129 PetriNetUnfolder]: 69409/129093 cut-off events. [2022-07-19 21:42:11,489 INFO L130 PetriNetUnfolder]: For 1018414/1018732 co-relation queries the response was YES. [2022-07-19 21:42:12,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603712 conditions, 129093 events. 69409/129093 cut-off events. For 1018414/1018732 co-relation queries the response was YES. Maximal size of possible extension queue 8302. Compared 1477313 event pairs, 8765 based on Foata normal form. 1799/129602 useless extension candidates. Maximal degree in co-relation 603671. Up to 17861 conditions per place. [2022-07-19 21:42:13,400 INFO L132 encePairwiseOnDemand]: 114/131 looper letters, 1018 selfloop transitions, 545 changer transitions 78/1708 dead transitions. [2022-07-19 21:42:13,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1708 transitions, 23713 flow [2022-07-19 21:42:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 21:42:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-19 21:42:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4288 transitions. [2022-07-19 21:42:13,422 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.711583139727846 [2022-07-19 21:42:13,423 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4288 transitions. [2022-07-19 21:42:13,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4288 transitions. [2022-07-19 21:42:13,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:13,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4288 transitions. [2022-07-19 21:42:13,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 93.21739130434783) internal successors, (4288), 46 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:13,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:13,449 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:13,449 INFO L186 Difference]: Start difference. First operand has 194 places, 308 transitions, 3242 flow. Second operand 46 states and 4288 transitions. [2022-07-19 21:42:13,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1708 transitions, 23713 flow [2022-07-19 21:42:20,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1708 transitions, 23019 flow, removed 321 selfloop flow, removed 6 redundant places. [2022-07-19 21:42:20,528 INFO L242 Difference]: Finished difference. Result has 254 places, 808 transitions, 11585 flow [2022-07-19 21:42:20,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=11585, PETRI_PLACES=254, PETRI_TRANSITIONS=808} [2022-07-19 21:42:20,529 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 137 predicate places. [2022-07-19 21:42:20,529 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 808 transitions, 11585 flow [2022-07-19 21:42:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:20,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:20,530 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:42:20,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:42:20,749 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,SelfDestructingSolverStorable13 [2022-07-19 21:42:20,761 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:42:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1843996306, now seen corresponding path program 4 times [2022-07-19 21:42:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:20,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892570780] [2022-07-19 21:42:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:20,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:20,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892570780] [2022-07-19 21:42:20,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892570780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:20,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717606180] [2022-07-19 21:42:20,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:42:20,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:20,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:20,896 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) [2022-07-19 21:42:20,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:42:20,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:42:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:42:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:21,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:21,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717606180] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:21,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:21,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-19 21:42:21,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613115687] [2022-07-19 21:42:21,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:42:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:42:21,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:42:21,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-19 21:42:21,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 808 transitions, 11585 flow. Second operand has 24 states, 24 states have (on average 87.5) internal successors, (2100), 24 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:21,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:21,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-19 21:42:21,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand