/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 21:29:39,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 21:29:39,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 21:29:39,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 21:29:39,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 21:29:39,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 21:29:39,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 21:29:39,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 21:29:39,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 21:29:39,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 21:29:39,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 21:29:39,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 21:29:39,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 21:29:39,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 21:29:39,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 21:29:39,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 21:29:39,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 21:29:39,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 21:29:39,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 21:29:39,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 21:29:39,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 21:29:39,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 21:29:39,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 21:29:39,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 21:29:39,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 21:29:39,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 21:29:39,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 21:29:39,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 21:29:39,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 21:29:39,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 21:29:39,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 21:29:39,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 21:29:39,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 21:29:39,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 21:29:39,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 21:29:39,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 21:29:39,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 21:29:39,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 21:29:39,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 21:29:39,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 21:29:39,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 21:29:39,287 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 21:29:39,310 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 21:29:39,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 21:29:39,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 21:29:39,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 21:29:39,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 21:29:39,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 21:29:39,312 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 21:29:39,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 21:29:39,313 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 21:29:39,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 21:29:39,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 21:29:39,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 21:29:39,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 21:29:39,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 21:29:39,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 21:29:39,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 21:29:39,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 21:29:39,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 21:29:39,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 21:29:39,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 21:29:39,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 21:29:39,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 21:29:39,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 21:29:39,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 21:29:39,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 21:29:39,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 21:29:39,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 21:29:39,610 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 21:29:39,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2022-12-12 21:29:40,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 21:29:41,025 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 21:29:41,025 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2022-12-12 21:29:41,033 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4db4731/58bd6152963c4dc08a6a5b5676f25c4e/FLAGb2cb6521d [2022-12-12 21:29:41,044 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4db4731/58bd6152963c4dc08a6a5b5676f25c4e [2022-12-12 21:29:41,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 21:29:41,046 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 21:29:41,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 21:29:41,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 21:29:41,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 21:29:41,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b3bb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41, skipping insertion in model container [2022-12-12 21:29:41,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 21:29:41,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 21:29:41,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,276 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,278 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,278 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,279 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,280 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2022-12-12 21:29:41,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 21:29:41,289 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 21:29:41,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 21:29:41,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 21:29:41,337 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2022-12-12 21:29:41,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 21:29:41,371 INFO L208 MainTranslator]: Completed translation [2022-12-12 21:29:41,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41 WrapperNode [2022-12-12 21:29:41,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 21:29:41,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 21:29:41,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 21:29:41,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 21:29:41,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,422 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-12-12 21:29:41,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 21:29:41,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 21:29:41,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 21:29:41,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 21:29:41,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 21:29:41,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 21:29:41,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 21:29:41,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 21:29:41,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (1/1) ... [2022-12-12 21:29:41,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 21:29:41,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:41,521 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) [2022-12-12 21:29:41,569 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 [2022-12-12 21:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 21:29:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 21:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 21:29:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 21:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 21:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 21:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 21:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 21:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 21:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 21:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 21:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 21:29:41,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 21:29:41,586 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 21:29:41,665 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 21:29:41,666 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 21:29:41,795 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 21:29:41,799 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 21:29:41,799 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 21:29:41,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 09:29:41 BoogieIcfgContainer [2022-12-12 21:29:41,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 21:29:41,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 21:29:41,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 21:29:41,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 21:29:41,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 09:29:41" (1/3) ... [2022-12-12 21:29:41,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755b670c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 09:29:41, skipping insertion in model container [2022-12-12 21:29:41,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:29:41" (2/3) ... [2022-12-12 21:29:41,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755b670c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 09:29:41, skipping insertion in model container [2022-12-12 21:29:41,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 09:29:41" (3/3) ... [2022-12-12 21:29:41,806 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2022-12-12 21:29:41,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 21:29:41,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 21:29:41,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 21:29:41,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-12 21:29:41,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2022-12-12 21:29:41,914 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2022-12-12 21:29:41,915 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 21:29:41,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-12-12 21:29:41,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2022-12-12 21:29:41,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2022-12-12 21:29:41,936 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 21:29:41,959 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2022-12-12 21:29:41,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2022-12-12 21:29:41,994 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2022-12-12 21:29:41,994 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 21:29:41,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-12-12 21:29:41,997 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2022-12-12 21:29:41,997 INFO L226 LiptonReduction]: Number of co-enabled transitions 1078 [2022-12-12 21:29:43,702 INFO L241 LiptonReduction]: Total number of compositions: 51 [2022-12-12 21:29:43,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 21:29:43,726 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=false, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35b76fe2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 21:29:43,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 21:29:43,733 INFO L130 PetriNetUnfolder]: 2/25 cut-off events. [2022-12-12 21:29:43,733 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 21:29:43,734 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:43,734 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-12 21:29:43,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1005742466, now seen corresponding path program 1 times [2022-12-12 21:29:43,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957141192] [2022-12-12 21:29:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:43,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:44,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:44,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957141192] [2022-12-12 21:29:44,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957141192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:29:44,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:29:44,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 21:29:44,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110695548] [2022-12-12 21:29:44,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:29:44,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 21:29:44,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 21:29:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 21:29:44,130 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:44,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:44,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:44,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:44,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:44,312 INFO L130 PetriNetUnfolder]: 681/1079 cut-off events. [2022-12-12 21:29:44,312 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 21:29:44,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143 conditions, 1079 events. 681/1079 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5102 event pairs, 66 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 2133. Up to 713 conditions per place. [2022-12-12 21:29:44,322 INFO L137 encePairwiseOnDemand]: 20/27 looper letters, 38 selfloop transitions, 10 changer transitions 8/60 dead transitions. [2022-12-12 21:29:44,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 60 transitions, 238 flow [2022-12-12 21:29:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 21:29:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 21:29:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2022-12-12 21:29:44,330 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2022-12-12 21:29:44,333 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2022-12-12 21:29:44,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 60 transitions, 238 flow [2022-12-12 21:29:44,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 52 transitions, 206 flow [2022-12-12 21:29:44,337 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 52 transitions, 206 flow [2022-12-12 21:29:44,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:44,337 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:44,337 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:44,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 21:29:44,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:44,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash -152048275, now seen corresponding path program 1 times [2022-12-12 21:29:44,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:44,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162866264] [2022-12-12 21:29:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:44,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:44,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:44,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162866264] [2022-12-12 21:29:44,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162866264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:29:44,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:29:44,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 21:29:44,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42833275] [2022-12-12 21:29:44,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:29:44,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 21:29:44,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 21:29:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 21:29:44,426 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:44,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 52 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:44,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:44,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:44,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:44,573 INFO L130 PetriNetUnfolder]: 880/1430 cut-off events. [2022-12-12 21:29:44,573 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-12 21:29:44,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4207 conditions, 1430 events. 880/1430 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7050 event pairs, 33 based on Foata normal form. 84/590 useless extension candidates. Maximal degree in co-relation 4194. Up to 1210 conditions per place. [2022-12-12 21:29:44,579 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 97 selfloop transitions, 32 changer transitions 6/139 dead transitions. [2022-12-12 21:29:44,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 139 transitions, 827 flow [2022-12-12 21:29:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 21:29:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 21:29:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2022-12-12 21:29:44,582 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.691358024691358 [2022-12-12 21:29:44,582 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2022-12-12 21:29:44,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 139 transitions, 827 flow [2022-12-12 21:29:44,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 133 transitions, 791 flow [2022-12-12 21:29:44,588 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 133 transitions, 791 flow [2022-12-12 21:29:44,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:44,588 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:44,588 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:44,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 21:29:44,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -152084545, now seen corresponding path program 2 times [2022-12-12 21:29:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:44,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031668496] [2022-12-12 21:29:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:44,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:44,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031668496] [2022-12-12 21:29:44,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031668496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:29:44,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:29:44,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 21:29:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644806962] [2022-12-12 21:29:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:29:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 21:29:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 21:29:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 21:29:44,694 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:44,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 133 transitions, 791 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:44,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:44,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:44,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:44,833 INFO L130 PetriNetUnfolder]: 747/1240 cut-off events. [2022-12-12 21:29:44,834 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-12 21:29:44,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 1240 events. 747/1240 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 6336 event pairs, 33 based on Foata normal form. 84/532 useless extension candidates. Maximal degree in co-relation 4808. Up to 1006 conditions per place. [2022-12-12 21:29:44,839 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 89 selfloop transitions, 35 changer transitions 30/158 dead transitions. [2022-12-12 21:29:44,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 158 transitions, 1249 flow [2022-12-12 21:29:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 21:29:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 21:29:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2022-12-12 21:29:44,842 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2022-12-12 21:29:44,843 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2022-12-12 21:29:44,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 158 transitions, 1249 flow [2022-12-12 21:29:44,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 128 transitions, 1009 flow [2022-12-12 21:29:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 128 transitions, 1009 flow [2022-12-12 21:29:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:44,849 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:44,849 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:44,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 21:29:44,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1910355368, now seen corresponding path program 1 times [2022-12-12 21:29:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:44,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300370937] [2022-12-12 21:29:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:44,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300370937] [2022-12-12 21:29:44,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300370937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:29:44,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:29:44,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 21:29:44,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89340636] [2022-12-12 21:29:44,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:29:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 21:29:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 21:29:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-12 21:29:44,936 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:44,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 128 transitions, 1009 flow. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:44,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:44,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:44,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:45,155 INFO L130 PetriNetUnfolder]: 993/1705 cut-off events. [2022-12-12 21:29:45,155 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-12 21:29:45,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8284 conditions, 1705 events. 993/1705 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 9570 event pairs, 45 based on Foata normal form. 98/681 useless extension candidates. Maximal degree in co-relation 8265. Up to 1551 conditions per place. [2022-12-12 21:29:45,164 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 108 selfloop transitions, 53 changer transitions 21/186 dead transitions. [2022-12-12 21:29:45,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 186 transitions, 1837 flow [2022-12-12 21:29:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 21:29:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 21:29:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2022-12-12 21:29:45,166 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2022-12-12 21:29:45,167 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2022-12-12 21:29:45,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 186 transitions, 1837 flow [2022-12-12 21:29:45,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 165 transitions, 1627 flow [2022-12-12 21:29:45,176 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 165 transitions, 1627 flow [2022-12-12 21:29:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:45,176 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:45,176 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 21:29:45,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -784611115, now seen corresponding path program 1 times [2022-12-12 21:29:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124230911] [2022-12-12 21:29:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:45,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:45,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124230911] [2022-12-12 21:29:45,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124230911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:29:45,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:29:45,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 21:29:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816407916] [2022-12-12 21:29:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:29:45,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 21:29:45,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 21:29:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-12 21:29:45,277 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:45,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 165 transitions, 1627 flow. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:45,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:45,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:45,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:45,472 INFO L130 PetriNetUnfolder]: 872/1522 cut-off events. [2022-12-12 21:29:45,473 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 21:29:45,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8830 conditions, 1522 events. 872/1522 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 8788 event pairs, 24 based on Foata normal form. 98/654 useless extension candidates. Maximal degree in co-relation 8808. Up to 1369 conditions per place. [2022-12-12 21:29:45,479 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 77 selfloop transitions, 55 changer transitions 57/193 dead transitions. [2022-12-12 21:29:45,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 193 transitions, 2285 flow [2022-12-12 21:29:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 21:29:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 21:29:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2022-12-12 21:29:45,482 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2022-12-12 21:29:45,482 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2022-12-12 21:29:45,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 193 transitions, 2285 flow [2022-12-12 21:29:45,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 136 transitions, 1601 flow [2022-12-12 21:29:45,488 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 136 transitions, 1601 flow [2022-12-12 21:29:45,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:45,488 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:45,488 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:45,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 21:29:45,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash -918934175, now seen corresponding path program 1 times [2022-12-12 21:29:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512184149] [2022-12-12 21:29:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:45,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512184149] [2022-12-12 21:29:45,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512184149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:45,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434086755] [2022-12-12 21:29:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:45,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:45,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:45,566 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) [2022-12-12 21:29:45,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 21:29:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 21:29:45,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:45,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:45,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434086755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:45,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:45,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 21:29:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796048664] [2022-12-12 21:29:45,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 21:29:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 21:29:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-12 21:29:45,876 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:45,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 136 transitions, 1601 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:45,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:45,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:45,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:46,209 INFO L130 PetriNetUnfolder]: 743/1327 cut-off events. [2022-12-12 21:29:46,209 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:29:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8838 conditions, 1327 events. 743/1327 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6807 event pairs, 24 based on Foata normal form. 294/712 useless extension candidates. Maximal degree in co-relation 8813. Up to 1209 conditions per place. [2022-12-12 21:29:46,215 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 115 selfloop transitions, 29 changer transitions 72/220 dead transitions. [2022-12-12 21:29:46,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 220 transitions, 3041 flow [2022-12-12 21:29:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 21:29:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 21:29:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2022-12-12 21:29:46,217 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.595679012345679 [2022-12-12 21:29:46,217 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2022-12-12 21:29:46,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 220 transitions, 3041 flow [2022-12-12 21:29:46,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 148 transitions, 2033 flow [2022-12-12 21:29:46,222 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 148 transitions, 2033 flow [2022-12-12 21:29:46,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:46,222 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:46,223 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:46,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 21:29:46,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 21:29:46,428 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -926083054, now seen corresponding path program 1 times [2022-12-12 21:29:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:46,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338060551] [2022-12-12 21:29:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:46,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:46,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:46,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338060551] [2022-12-12 21:29:46,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338060551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:46,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249525110] [2022-12-12 21:29:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:46,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:46,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:46,524 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) [2022-12-12 21:29:46,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 21:29:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 21:29:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:46,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:46,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249525110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:46,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:46,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-12 21:29:46,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012696788] [2022-12-12 21:29:46,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:46,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 21:29:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 21:29:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-12 21:29:46,705 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:46,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 148 transitions, 2033 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:46,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:46,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:46,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:47,254 INFO L130 PetriNetUnfolder]: 1119/1906 cut-off events. [2022-12-12 21:29:47,254 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:29:47,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14587 conditions, 1906 events. 1119/1906 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 10893 event pairs, 24 based on Foata normal form. 343/977 useless extension candidates. Maximal degree in co-relation 14559. Up to 1773 conditions per place. [2022-12-12 21:29:47,264 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 135 selfloop transitions, 70 changer transitions 120/329 dead transitions. [2022-12-12 21:29:47,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 329 transitions, 5217 flow [2022-12-12 21:29:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 21:29:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 21:29:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 288 transitions. [2022-12-12 21:29:47,274 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2022-12-12 21:29:47,275 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 53 predicate places. [2022-12-12 21:29:47,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 329 transitions, 5217 flow [2022-12-12 21:29:47,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 209 transitions, 3297 flow [2022-12-12 21:29:47,283 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 209 transitions, 3297 flow [2022-12-12 21:29:47,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:47,283 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:47,283 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:47,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 21:29:47,488 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,SelfDestructingSolverStorable6 [2022-12-12 21:29:47,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1957813302, now seen corresponding path program 1 times [2022-12-12 21:29:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:47,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097199054] [2022-12-12 21:29:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:47,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:47,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097199054] [2022-12-12 21:29:47,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097199054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:47,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891895749] [2022-12-12 21:29:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:47,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:47,626 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) [2022-12-12 21:29:47,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 21:29:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:47,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 21:29:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:47,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891895749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:47,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:47,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 21:29:47,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539919442] [2022-12-12 21:29:47,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 21:29:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 21:29:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-12 21:29:47,864 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:47,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 209 transitions, 3297 flow. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:47,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:47,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:48,336 INFO L130 PetriNetUnfolder]: 1332/2379 cut-off events. [2022-12-12 21:29:48,336 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:29:48,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20262 conditions, 2379 events. 1332/2379 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 14357 event pairs, 3 based on Foata normal form. 294/1065 useless extension candidates. Maximal degree in co-relation 20231. Up to 2197 conditions per place. [2022-12-12 21:29:48,347 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 182 selfloop transitions, 101 changer transitions 60/347 dead transitions. [2022-12-12 21:29:48,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 347 transitions, 6191 flow [2022-12-12 21:29:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 21:29:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 21:29:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 274 transitions. [2022-12-12 21:29:48,349 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5637860082304527 [2022-12-12 21:29:48,349 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 70 predicate places. [2022-12-12 21:29:48,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 347 transitions, 6191 flow [2022-12-12 21:29:48,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 287 transitions, 5111 flow [2022-12-12 21:29:48,359 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 287 transitions, 5111 flow [2022-12-12 21:29:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:48,359 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:48,359 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:48,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 21:29:48,568 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 [2022-12-12 21:29:48,568 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1960494114, now seen corresponding path program 1 times [2022-12-12 21:29:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:48,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289676068] [2022-12-12 21:29:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:48,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:48,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289676068] [2022-12-12 21:29:48,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289676068] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:48,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589158531] [2022-12-12 21:29:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:48,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:48,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:48,651 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) [2022-12-12 21:29:48,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 21:29:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 21:29:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:48,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:48,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589158531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:48,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:48,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 21:29:48,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333575420] [2022-12-12 21:29:48,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 21:29:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 21:29:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-12 21:29:48,795 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:48,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 287 transitions, 5111 flow. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:48,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:48,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:48,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:49,592 INFO L130 PetriNetUnfolder]: 1767/3169 cut-off events. [2022-12-12 21:29:49,593 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:29:49,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30090 conditions, 3169 events. 1767/3169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 20577 event pairs, 63 based on Foata normal form. 343/1394 useless extension candidates. Maximal degree in co-relation 30056. Up to 2953 conditions per place. [2022-12-12 21:29:49,602 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 128 selfloop transitions, 114 changer transitions 258/504 dead transitions. [2022-12-12 21:29:49,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 504 transitions, 10017 flow [2022-12-12 21:29:49,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 21:29:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 21:29:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 330 transitions. [2022-12-12 21:29:49,621 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2022-12-12 21:29:49,622 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 91 predicate places. [2022-12-12 21:29:49,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 504 transitions, 10017 flow [2022-12-12 21:29:49,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 246 transitions, 4857 flow [2022-12-12 21:29:49,631 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 246 transitions, 4857 flow [2022-12-12 21:29:49,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:49,631 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:49,631 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:49,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 21:29:49,832 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 [2022-12-12 21:29:49,832 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:49,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1548320061, now seen corresponding path program 1 times [2022-12-12 21:29:49,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:49,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311154363] [2022-12-12 21:29:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:49,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:49,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311154363] [2022-12-12 21:29:49,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311154363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498893932] [2022-12-12 21:29:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:49,961 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) [2022-12-12 21:29:49,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 21:29:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 21:29:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:50,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:50,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498893932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:50,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:50,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-12-12 21:29:50,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117020790] [2022-12-12 21:29:50,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:50,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 21:29:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 21:29:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-12-12 21:29:50,234 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:50,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 246 transitions, 4857 flow. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:50,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:50,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:50,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:51,338 INFO L130 PetriNetUnfolder]: 1942/3420 cut-off events. [2022-12-12 21:29:51,339 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:29:51,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35481 conditions, 3420 events. 1942/3420 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 21036 event pairs, 24 based on Foata normal form. 441/1779 useless extension candidates. Maximal degree in co-relation 35444. Up to 3168 conditions per place. [2022-12-12 21:29:51,350 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 135 selfloop transitions, 133 changer transitions 276/548 dead transitions. [2022-12-12 21:29:51,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 548 transitions, 11985 flow [2022-12-12 21:29:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-12 21:29:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-12 21:29:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 499 transitions. [2022-12-12 21:29:51,352 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5133744855967078 [2022-12-12 21:29:51,353 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 126 predicate places. [2022-12-12 21:29:51,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 548 transitions, 11985 flow [2022-12-12 21:29:51,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 272 transitions, 5913 flow [2022-12-12 21:29:51,363 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 272 transitions, 5913 flow [2022-12-12 21:29:51,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:51,363 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:51,364 INFO L214 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:51,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 21:29:51,568 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 [2022-12-12 21:29:51,569 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash -153652929, now seen corresponding path program 2 times [2022-12-12 21:29:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:51,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353301892] [2022-12-12 21:29:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353301892] [2022-12-12 21:29:51,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353301892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650462839] [2022-12-12 21:29:51,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:29:51,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:51,799 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) [2022-12-12 21:29:51,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 21:29:51,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:29:51,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:29:51,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 21:29:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:51,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:52,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650462839] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:52,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:52,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-12-12 21:29:52,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991767335] [2022-12-12 21:29:52,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-12 21:29:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-12 21:29:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2022-12-12 21:29:52,275 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:52,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 272 transitions, 5913 flow. Second operand has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:52,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:52,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:52,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:53,319 INFO L130 PetriNetUnfolder]: 1386/2742 cut-off events. [2022-12-12 21:29:53,320 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:29:53,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30198 conditions, 2742 events. 1386/2742 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16490 event pairs, 24 based on Foata normal form. 784/1750 useless extension candidates. Maximal degree in co-relation 30158. Up to 2458 conditions per place. [2022-12-12 21:29:53,332 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 259 selfloop transitions, 121 changer transitions 216/600 dead transitions. [2022-12-12 21:29:53,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 600 transitions, 14321 flow [2022-12-12 21:29:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-12 21:29:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-12 21:29:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 475 transitions. [2022-12-12 21:29:53,333 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-12-12 21:29:53,334 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 163 predicate places. [2022-12-12 21:29:53,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 600 transitions, 14321 flow [2022-12-12 21:29:53,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 384 transitions, 9137 flow [2022-12-12 21:29:53,346 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 384 transitions, 9137 flow [2022-12-12 21:29:53,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:53,346 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:53,346 INFO L214 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:53,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 21:29:53,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:53,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash 487373703, now seen corresponding path program 1 times [2022-12-12 21:29:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:53,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860409668] [2022-12-12 21:29:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860409668] [2022-12-12 21:29:53,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860409668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478519711] [2022-12-12 21:29:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:53,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:53,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:53,790 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) [2022-12-12 21:29:53,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 21:29:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:53,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 21:29:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:53,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:54,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478519711] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:54,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:54,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-12-12 21:29:54,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536371308] [2022-12-12 21:29:54,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:54,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-12 21:29:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-12 21:29:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-12-12 21:29:54,219 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:54,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 384 transitions, 9137 flow. Second operand has 35 states, 35 states have (on average 5.3428571428571425) internal successors, (187), 35 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:54,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:54,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:54,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:55,559 INFO L130 PetriNetUnfolder]: 1532/3013 cut-off events. [2022-12-12 21:29:55,559 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:29:55,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35592 conditions, 3013 events. 1532/3013 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18602 event pairs, 24 based on Foata normal form. 784/1931 useless extension candidates. Maximal degree in co-relation 35549. Up to 2677 conditions per place. [2022-12-12 21:29:55,573 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 278 selfloop transitions, 213 changer transitions 252/747 dead transitions. [2022-12-12 21:29:55,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 747 transitions, 19335 flow [2022-12-12 21:29:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-12 21:29:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-12 21:29:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 520 transitions. [2022-12-12 21:29:55,574 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4377104377104377 [2022-12-12 21:29:55,576 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 206 predicate places. [2022-12-12 21:29:55,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 747 transitions, 19335 flow [2022-12-12 21:29:55,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 495 transitions, 12783 flow [2022-12-12 21:29:55,590 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 495 transitions, 12783 flow [2022-12-12 21:29:55,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.3428571428571425) internal successors, (187), 35 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:55,591 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:55,591 INFO L214 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:55,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 21:29:55,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:55,796 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash 8409081, now seen corresponding path program 2 times [2022-12-12 21:29:55,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:55,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278704167] [2022-12-12 21:29:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:55,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:56,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278704167] [2022-12-12 21:29:56,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278704167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988169785] [2022-12-12 21:29:56,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:29:56,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:56,011 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) [2022-12-12 21:29:56,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 21:29:56,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:29:56,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:29:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 21:29:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:56,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:56,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988169785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:56,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:56,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-12-12 21:29:56,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700186063] [2022-12-12 21:29:56,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:56,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-12 21:29:56,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-12 21:29:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-12-12 21:29:56,346 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:56,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 495 transitions, 12783 flow. Second operand has 34 states, 34 states have (on average 5.323529411764706) internal successors, (181), 34 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:56,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:56,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:56,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:29:58,056 INFO L130 PetriNetUnfolder]: 2679/5067 cut-off events. [2022-12-12 21:29:58,056 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:29:58,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65268 conditions, 5067 events. 2679/5067 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 32175 event pairs, 3 based on Foata normal form. 784/2755 useless extension candidates. Maximal degree in co-relation 65222. Up to 4593 conditions per place. [2022-12-12 21:29:58,078 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 357 selfloop transitions, 326 changer transitions 252/939 dead transitions. [2022-12-12 21:29:58,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 939 transitions, 26197 flow [2022-12-12 21:29:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-12 21:29:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-12 21:29:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 695 transitions. [2022-12-12 21:29:58,088 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4766803840877915 [2022-12-12 21:29:58,089 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 259 predicate places. [2022-12-12 21:29:58,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 939 transitions, 26197 flow [2022-12-12 21:29:58,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 687 transitions, 19141 flow [2022-12-12 21:29:58,113 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 687 transitions, 19141 flow [2022-12-12 21:29:58,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.323529411764706) internal successors, (181), 34 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:58,114 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:29:58,115 INFO L214 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:29:58,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 21:29:58,319 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,SelfDestructingSolverStorable12 [2022-12-12 21:29:58,320 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:29:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:29:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 196763397, now seen corresponding path program 3 times [2022-12-12 21:29:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:29:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366246318] [2022-12-12 21:29:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:29:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:29:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:29:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:58,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:29:58,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366246318] [2022-12-12 21:29:58,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366246318] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:29:58,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512007271] [2022-12-12 21:29:58,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 21:29:58,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:29:58,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:29:58,536 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) [2022-12-12 21:29:58,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 21:29:58,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-12 21:29:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:29:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 21:29:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:29:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:58,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:29:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:29:59,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512007271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:29:59,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:29:59,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2022-12-12 21:29:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940285877] [2022-12-12 21:29:59,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:29:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:29:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:29:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:29:59,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=1508, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:29:59,068 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:29:59,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 687 transitions, 19141 flow. Second operand has 45 states, 45 states have (on average 5.2444444444444445) internal successors, (236), 45 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:29:59,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:29:59,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:29:59,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:02,634 INFO L130 PetriNetUnfolder]: 4933/9167 cut-off events. [2022-12-12 21:30:02,700 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:30:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127940 conditions, 9167 events. 4933/9167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 61764 event pairs, 99 based on Foata normal form. 1127/4588 useless extension candidates. Maximal degree in co-relation 127891. Up to 8446 conditions per place. [2022-12-12 21:30:02,732 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 373 selfloop transitions, 406 changer transitions 804/1587 dead transitions. [2022-12-12 21:30:02,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1587 transitions, 47507 flow [2022-12-12 21:30:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-12 21:30:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-12 21:30:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 1114 transitions. [2022-12-12 21:30:02,735 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4970995091477019 [2022-12-12 21:30:02,735 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 341 predicate places. [2022-12-12 21:30:02,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 1587 transitions, 47507 flow [2022-12-12 21:30:02,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 783 transitions, 23387 flow [2022-12-12 21:30:02,765 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 783 transitions, 23387 flow [2022-12-12 21:30:02,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.2444444444444445) internal successors, (236), 45 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:02,766 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:02,766 INFO L214 CegarLoopForPetriNet]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:02,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-12 21:30:02,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 21:30:02,973 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash -347550453, now seen corresponding path program 4 times [2022-12-12 21:30:02,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:02,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910059587] [2022-12-12 21:30:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:02,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910059587] [2022-12-12 21:30:03,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910059587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315598534] [2022-12-12 21:30:03,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 21:30:03,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:03,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:03,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:03,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 21:30:03,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 21:30:03,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 21:30:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:03,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:04,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315598534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:04,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:04,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 79 [2022-12-12 21:30:04,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351501220] [2022-12-12 21:30:04,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:04,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-12 21:30:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-12 21:30:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1506, Invalid=4974, Unknown=0, NotChecked=0, Total=6480 [2022-12-12 21:30:04,525 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:04,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 783 transitions, 23387 flow. Second operand has 81 states, 81 states have (on average 5.135802469135802) internal successors, (416), 81 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:04,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:04,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:04,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:07,238 INFO L130 PetriNetUnfolder]: 1333/2724 cut-off events. [2022-12-12 21:30:07,238 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:30:07,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37130 conditions, 2724 events. 1333/2724 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14818 event pairs, 24 based on Foata normal form. 147/1887 useless extension candidates. Maximal degree in co-relation 37078. Up to 2256 conditions per place. [2022-12-12 21:30:07,290 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 453 selfloop transitions, 475 changer transitions 72/1004 dead transitions. [2022-12-12 21:30:07,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1004 transitions, 32017 flow [2022-12-12 21:30:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-12 21:30:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-12-12 21:30:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 631 transitions. [2022-12-12 21:30:07,293 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29212962962962963 [2022-12-12 21:30:07,294 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 420 predicate places. [2022-12-12 21:30:07,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 452 places, 1004 transitions, 32017 flow [2022-12-12 21:30:07,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 452 places, 932 transitions, 29713 flow [2022-12-12 21:30:07,317 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 932 transitions, 29713 flow [2022-12-12 21:30:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 5.135802469135802) internal successors, (416), 81 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:07,317 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:07,318 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:07,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:07,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 21:30:07,523 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:07,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:07,524 INFO L85 PathProgramCache]: Analyzing trace with hash -234928943, now seen corresponding path program 1 times [2022-12-12 21:30:07,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:07,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582130020] [2022-12-12 21:30:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:07,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:08,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:08,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582130020] [2022-12-12 21:30:08,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582130020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:08,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997248063] [2022-12-12 21:30:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:08,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:08,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:08,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:08,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 21:30:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:08,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:08,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:08,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:09,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997248063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:09,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:09,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:30:09,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527554643] [2022-12-12 21:30:09,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:09,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:30:09,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:30:09,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:30:09,266 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:09,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 932 transitions, 29713 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:09,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:09,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:09,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:10,676 INFO L130 PetriNetUnfolder]: 1063/2253 cut-off events. [2022-12-12 21:30:10,677 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:30:10,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31368 conditions, 2253 events. 1063/2253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11686 event pairs, 24 based on Foata normal form. 98/1697 useless extension candidates. Maximal degree in co-relation 31313. Up to 1782 conditions per place. [2022-12-12 21:30:10,692 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 889 selfloop transitions, 111 changer transitions 24/1028 dead transitions. [2022-12-12 21:30:10,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1028 transitions, 34833 flow [2022-12-12 21:30:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-12 21:30:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-12 21:30:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 339 transitions. [2022-12-12 21:30:10,694 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27294685990338163 [2022-12-12 21:30:10,695 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 465 predicate places. [2022-12-12 21:30:10,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 497 places, 1028 transitions, 34833 flow [2022-12-12 21:30:10,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 497 places, 1004 transitions, 34017 flow [2022-12-12 21:30:10,718 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1004 transitions, 34017 flow [2022-12-12 21:30:10,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:10,718 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:10,720 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:10,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-12 21:30:10,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 21:30:10,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:10,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1173189569, now seen corresponding path program 2 times [2022-12-12 21:30:10,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:10,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918853524] [2022-12-12 21:30:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:10,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:11,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:11,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918853524] [2022-12-12 21:30:11,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918853524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:11,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854639533] [2022-12-12 21:30:11,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:30:11,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:11,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:11,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:11,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 21:30:11,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:30:11,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:11,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:11,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:12,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854639533] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:12,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:12,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:30:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568014363] [2022-12-12 21:30:12,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:30:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:30:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:30:12,561 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:12,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1004 transitions, 34017 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:12,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:12,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:12,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:14,108 INFO L130 PetriNetUnfolder]: 1194/2537 cut-off events. [2022-12-12 21:30:14,109 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:30:14,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37109 conditions, 2537 events. 1194/2537 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13559 event pairs, 24 based on Foata normal form. 98/1921 useless extension candidates. Maximal degree in co-relation 37051. Up to 1996 conditions per place. [2022-12-12 21:30:14,127 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 956 selfloop transitions, 210 changer transitions 24/1194 dead transitions. [2022-12-12 21:30:14,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 1194 transitions, 42857 flow [2022-12-12 21:30:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-12 21:30:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-12 21:30:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 362 transitions. [2022-12-12 21:30:14,128 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.273620559334845 [2022-12-12 21:30:14,129 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 513 predicate places. [2022-12-12 21:30:14,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 545 places, 1194 transitions, 42857 flow [2022-12-12 21:30:14,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 545 places, 1170 transitions, 41993 flow [2022-12-12 21:30:14,156 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1170 transitions, 41993 flow [2022-12-12 21:30:14,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:14,157 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:14,157 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:14,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:14,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 21:30:14,362 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1072939991, now seen corresponding path program 1 times [2022-12-12 21:30:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:14,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041195516] [2022-12-12 21:30:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:15,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041195516] [2022-12-12 21:30:15,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041195516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707206165] [2022-12-12 21:30:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:15,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:15,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:15,197 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:15,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 21:30:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:15,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:15,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:16,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707206165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:16,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:16,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:30:16,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252310365] [2022-12-12 21:30:16,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:16,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:30:16,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:30:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:30:16,161 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:16,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1170 transitions, 41993 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:16,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:16,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:16,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:18,084 INFO L130 PetriNetUnfolder]: 1278/2676 cut-off events. [2022-12-12 21:30:18,084 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:30:18,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41441 conditions, 2676 events. 1278/2676 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14296 event pairs, 24 based on Foata normal form. 98/2000 useless extension candidates. Maximal degree in co-relation 41380. Up to 2116 conditions per place. [2022-12-12 21:30:18,103 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 900 selfloop transitions, 338 changer transitions 24/1266 dead transitions. [2022-12-12 21:30:18,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1266 transitions, 47973 flow [2022-12-12 21:30:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-12 21:30:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-12 21:30:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 376 transitions. [2022-12-12 21:30:18,104 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2730573710965868 [2022-12-12 21:30:18,105 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 563 predicate places. [2022-12-12 21:30:18,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 595 places, 1266 transitions, 47973 flow [2022-12-12 21:30:18,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 595 places, 1242 transitions, 47061 flow [2022-12-12 21:30:18,133 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 1242 transitions, 47061 flow [2022-12-12 21:30:18,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:18,133 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:18,133 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:18,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:18,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 21:30:18,338 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:18,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:18,339 INFO L85 PathProgramCache]: Analyzing trace with hash 162913683, now seen corresponding path program 2 times [2022-12-12 21:30:18,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:18,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405255287] [2022-12-12 21:30:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:19,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:19,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405255287] [2022-12-12 21:30:19,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405255287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:19,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567570251] [2022-12-12 21:30:19,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:30:19,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:19,071 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:19,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 21:30:19,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:30:19,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:19,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:19,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567570251] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:19,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:19,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:30:19,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130514260] [2022-12-12 21:30:19,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:19,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:30:19,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:19,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:30:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:30:19,772 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:19,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 1242 transitions, 47061 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:19,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:19,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:19,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:21,801 INFO L130 PetriNetUnfolder]: 1406/2952 cut-off events. [2022-12-12 21:30:21,802 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:30:21,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47822 conditions, 2952 events. 1406/2952 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15938 event pairs, 24 based on Foata normal form. 98/2216 useless extension candidates. Maximal degree in co-relation 47758. Up to 2324 conditions per place. [2022-12-12 21:30:21,826 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 964 selfloop transitions, 434 changer transitions 24/1426 dead transitions. [2022-12-12 21:30:21,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 1426 transitions, 56897 flow [2022-12-12 21:30:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-12 21:30:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-12 21:30:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 380 transitions. [2022-12-12 21:30:21,827 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2706552706552707 [2022-12-12 21:30:21,827 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 614 predicate places. [2022-12-12 21:30:21,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 646 places, 1426 transitions, 56897 flow [2022-12-12 21:30:21,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 646 places, 1402 transitions, 55937 flow [2022-12-12 21:30:21,864 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1402 transitions, 55937 flow [2022-12-12 21:30:21,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:21,864 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:21,864 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:21,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:22,071 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1765317596, now seen corresponding path program 1 times [2022-12-12 21:30:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107077198] [2022-12-12 21:30:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:22,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107077198] [2022-12-12 21:30:22,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107077198] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:22,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652607723] [2022-12-12 21:30:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:22,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:22,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:22,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:22,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 21:30:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:22,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:22,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:22,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:23,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652607723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:23,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:23,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:30:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667882976] [2022-12-12 21:30:23,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:30:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:30:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:30:23,187 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:23,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1402 transitions, 55937 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:23,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:23,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:23,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:25,057 INFO L130 PetriNetUnfolder]: 1510/3157 cut-off events. [2022-12-12 21:30:25,057 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:30:25,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53588 conditions, 3157 events. 1510/3157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17500 event pairs, 24 based on Foata normal form. 98/2361 useless extension candidates. Maximal degree in co-relation 53521. Up to 2484 conditions per place. [2022-12-12 21:30:25,083 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 988 selfloop transitions, 522 changer transitions 24/1538 dead transitions. [2022-12-12 21:30:25,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 1538 transitions, 64445 flow [2022-12-12 21:30:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-12 21:30:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-12 21:30:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 404 transitions. [2022-12-12 21:30:25,084 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27205387205387205 [2022-12-12 21:30:25,085 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 668 predicate places. [2022-12-12 21:30:25,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 700 places, 1538 transitions, 64445 flow [2022-12-12 21:30:25,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 700 places, 1514 transitions, 63437 flow [2022-12-12 21:30:25,123 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 1514 transitions, 63437 flow [2022-12-12 21:30:25,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:25,123 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:25,123 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:25,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:25,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:25,329 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:25,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1607209799, now seen corresponding path program 3 times [2022-12-12 21:30:25,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:25,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009676199] [2022-12-12 21:30:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:25,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:25,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009676199] [2022-12-12 21:30:25,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009676199] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619572334] [2022-12-12 21:30:25,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 21:30:25,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:25,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:25,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:25,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 21:30:25,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-12-12 21:30:25,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:26,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:26,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619572334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:26,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:26,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:30:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475016914] [2022-12-12 21:30:26,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:26,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:30:26,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:30:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:30:26,539 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:26,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 1514 transitions, 63437 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:26,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:26,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:26,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:28,685 INFO L130 PetriNetUnfolder]: 1632/3406 cut-off events. [2022-12-12 21:30:28,685 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:30:28,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60474 conditions, 3406 events. 1632/3406 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18834 event pairs, 24 based on Foata normal form. 98/2550 useless extension candidates. Maximal degree in co-relation 60404. Up to 2680 conditions per place. [2022-12-12 21:30:28,714 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1010 selfloop transitions, 648 changer transitions 24/1686 dead transitions. [2022-12-12 21:30:28,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1686 transitions, 74025 flow [2022-12-12 21:30:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-12 21:30:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-12 21:30:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 418 transitions. [2022-12-12 21:30:28,715 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2716049382716049 [2022-12-12 21:30:28,715 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 724 predicate places. [2022-12-12 21:30:28,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 756 places, 1686 transitions, 74025 flow [2022-12-12 21:30:28,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 756 places, 1662 transitions, 72969 flow [2022-12-12 21:30:28,758 INFO L495 AbstractCegarLoop]: Abstraction has has 756 places, 1662 transitions, 72969 flow [2022-12-12 21:30:28,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:28,758 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:28,758 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:28,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:28,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:28,963 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1610901442, now seen corresponding path program 2 times [2022-12-12 21:30:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681971845] [2022-12-12 21:30:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:29,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681971845] [2022-12-12 21:30:29,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681971845] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:29,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87830946] [2022-12-12 21:30:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:30:29,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:29,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:29,666 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:29,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 21:30:29,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:30:29,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:29,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87830946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:30,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:30,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:30:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596518229] [2022-12-12 21:30:30,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:30:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:30:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:30:30,285 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:30,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 1662 transitions, 72969 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:30,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:30,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:30,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:32,739 INFO L130 PetriNetUnfolder]: 1752/3661 cut-off events. [2022-12-12 21:30:32,740 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:30:32,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67670 conditions, 3661 events. 1752/3661 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20788 event pairs, 24 based on Foata normal form. 98/2745 useless extension candidates. Maximal degree in co-relation 67597. Up to 2872 conditions per place. [2022-12-12 21:30:32,770 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1078 selfloop transitions, 724 changer transitions 24/1830 dead transitions. [2022-12-12 21:30:32,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 1830 transitions, 84013 flow [2022-12-12 21:30:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-12 21:30:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-12 21:30:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 408 transitions. [2022-12-12 21:30:32,786 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2698412698412698 [2022-12-12 21:30:32,786 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 779 predicate places. [2022-12-12 21:30:32,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 811 places, 1830 transitions, 84013 flow [2022-12-12 21:30:32,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 811 places, 1806 transitions, 82909 flow [2022-12-12 21:30:32,834 INFO L495 AbstractCegarLoop]: Abstraction has has 811 places, 1806 transitions, 82909 flow [2022-12-12 21:30:32,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:32,835 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:32,835 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:32,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:33,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:33,040 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash -655091025, now seen corresponding path program 4 times [2022-12-12 21:30:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:33,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736756985] [2022-12-12 21:30:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:33,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:33,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736756985] [2022-12-12 21:30:33,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736756985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819609768] [2022-12-12 21:30:33,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 21:30:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:33,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:33,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:33,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 21:30:33,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 21:30:33,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:33,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:33,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:34,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819609768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:34,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:34,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:30:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520980726] [2022-12-12 21:30:34,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:34,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:30:34,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:34,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:30:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:30:34,514 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:34,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 811 places, 1806 transitions, 82909 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:34,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:34,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:34,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:37,674 INFO L130 PetriNetUnfolder]: 1870/3906 cut-off events. [2022-12-12 21:30:37,675 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:30:37,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75148 conditions, 3906 events. 1870/3906 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22730 event pairs, 24 based on Foata normal form. 98/2930 useless extension candidates. Maximal degree in co-relation 75072. Up to 3060 conditions per place. [2022-12-12 21:30:37,710 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1140 selfloop transitions, 802 changer transitions 24/1970 dead transitions. [2022-12-12 21:30:37,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 1970 transitions, 94385 flow [2022-12-12 21:30:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-12 21:30:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-12 21:30:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 432 transitions. [2022-12-12 21:30:37,711 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2711864406779661 [2022-12-12 21:30:37,711 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 837 predicate places. [2022-12-12 21:30:37,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 869 places, 1970 transitions, 94385 flow [2022-12-12 21:30:37,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 869 places, 1946 transitions, 93233 flow [2022-12-12 21:30:37,767 INFO L495 AbstractCegarLoop]: Abstraction has has 869 places, 1946 transitions, 93233 flow [2022-12-12 21:30:37,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:37,767 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:37,767 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:37,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:37,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:37,971 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash 702146212, now seen corresponding path program 3 times [2022-12-12 21:30:37,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:37,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013930065] [2022-12-12 21:30:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:37,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:38,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:38,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013930065] [2022-12-12 21:30:38,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013930065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:38,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149247646] [2022-12-12 21:30:38,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 21:30:38,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:38,622 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:38,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 21:30:38,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-12-12 21:30:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:38,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:39,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149247646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:39,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:39,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:30:39,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000791903] [2022-12-12 21:30:39,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:39,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:30:39,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:30:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:30:39,443 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:39,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 1946 transitions, 93233 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:39,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:39,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:39,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:42,978 INFO L130 PetriNetUnfolder]: 1984/4137 cut-off events. [2022-12-12 21:30:42,978 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:30:42,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82796 conditions, 4137 events. 1984/4137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24502 event pairs, 24 based on Foata normal form. 98/3101 useless extension candidates. Maximal degree in co-relation 82717. Up to 3240 conditions per place. [2022-12-12 21:30:43,017 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1194 selfloop transitions, 880 changer transitions 24/2102 dead transitions. [2022-12-12 21:30:43,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 929 places, 2102 transitions, 104917 flow [2022-12-12 21:30:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-12 21:30:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-12 21:30:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 446 transitions. [2022-12-12 21:30:43,018 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2707953855494839 [2022-12-12 21:30:43,018 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 897 predicate places. [2022-12-12 21:30:43,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 929 places, 2102 transitions, 104917 flow [2022-12-12 21:30:43,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 929 places, 2078 transitions, 103717 flow [2022-12-12 21:30:43,082 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 2078 transitions, 103717 flow [2022-12-12 21:30:43,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:43,083 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:43,083 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:43,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-12 21:30:43,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:43,288 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:43,288 INFO L85 PathProgramCache]: Analyzing trace with hash 556846880, now seen corresponding path program 4 times [2022-12-12 21:30:43,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:43,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602253825] [2022-12-12 21:30:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:43,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602253825] [2022-12-12 21:30:43,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602253825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880724142] [2022-12-12 21:30:43,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 21:30:43,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:43,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:43,853 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:43,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 21:30:43,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 21:30:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:44,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:44,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880724142] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:44,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:44,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:30:44,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447174760] [2022-12-12 21:30:44,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:44,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:30:44,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:30:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:30:44,419 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:44,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 929 places, 2078 transitions, 103717 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:44,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:44,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:44,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:48,157 INFO L130 PetriNetUnfolder]: 2092/4351 cut-off events. [2022-12-12 21:30:48,157 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:30:48,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90487 conditions, 4351 events. 2092/4351 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26027 event pairs, 24 based on Foata normal form. 98/3255 useless extension candidates. Maximal degree in co-relation 90405. Up to 3408 conditions per place. [2022-12-12 21:30:48,203 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1238 selfloop transitions, 956 changer transitions 24/2222 dead transitions. [2022-12-12 21:30:48,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 990 places, 2222 transitions, 115353 flow [2022-12-12 21:30:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-12 21:30:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-12 21:30:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 450 transitions. [2022-12-12 21:30:48,204 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26881720430107525 [2022-12-12 21:30:48,204 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 958 predicate places. [2022-12-12 21:30:48,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 990 places, 2222 transitions, 115353 flow [2022-12-12 21:30:48,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 990 places, 2198 transitions, 114105 flow [2022-12-12 21:30:48,277 INFO L495 AbstractCegarLoop]: Abstraction has has 990 places, 2198 transitions, 114105 flow [2022-12-12 21:30:48,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:48,277 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:48,277 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:48,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:48,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-12 21:30:48,481 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:48,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1164687983, now seen corresponding path program 5 times [2022-12-12 21:30:48,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:48,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231003836] [2022-12-12 21:30:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:48,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:49,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231003836] [2022-12-12 21:30:49,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231003836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735691933] [2022-12-12 21:30:49,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 21:30:49,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:49,195 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 21:30:49,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-12-12 21:30:49,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:49,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:49,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:49,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:49,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735691933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:49,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:49,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:30:49,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391126293] [2022-12-12 21:30:49,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:49,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:30:49,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:30:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1698, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:30:49,766 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:49,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 990 places, 2198 transitions, 114105 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:49,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:49,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:49,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:53,597 INFO L130 PetriNetUnfolder]: 2198/4556 cut-off events. [2022-12-12 21:30:53,598 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:30:53,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98401 conditions, 4556 events. 2198/4556 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27536 event pairs, 24 based on Foata normal form. 98/3400 useless extension candidates. Maximal degree in co-relation 98316. Up to 3572 conditions per place. [2022-12-12 21:30:53,642 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1288 selfloop transitions, 1022 changer transitions 24/2338 dead transitions. [2022-12-12 21:30:53,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1054 places, 2338 transitions, 126053 flow [2022-12-12 21:30:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-12 21:30:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-12 21:30:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 474 transitions. [2022-12-12 21:30:53,651 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27008547008547007 [2022-12-12 21:30:53,652 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1022 predicate places. [2022-12-12 21:30:53,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 1054 places, 2338 transitions, 126053 flow [2022-12-12 21:30:53,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1054 places, 2314 transitions, 124757 flow [2022-12-12 21:30:53,723 INFO L495 AbstractCegarLoop]: Abstraction has has 1054 places, 2314 transitions, 124757 flow [2022-12-12 21:30:53,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:53,723 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:53,723 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:53,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 21:30:53,928 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 617175875, now seen corresponding path program 6 times [2022-12-12 21:30:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:53,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231856919] [2022-12-12 21:30:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:30:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:54,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:30:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231856919] [2022-12-12 21:30:54,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231856919] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:30:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104958601] [2022-12-12 21:30:54,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 21:30:54,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:30:54,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:30:54,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:30:54,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 21:30:54,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-12-12 21:30:54,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:30:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:30:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:30:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:30:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:30:55,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104958601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:30:55,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:30:55,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:30:55,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956402097] [2022-12-12 21:30:55,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:30:55,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:30:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:30:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:30:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:30:55,049 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:30:55,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 2314 transitions, 124757 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:55,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:30:55,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:30:55,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:30:59,366 INFO L130 PetriNetUnfolder]: 2294/4733 cut-off events. [2022-12-12 21:30:59,366 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:30:59,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106075 conditions, 4733 events. 2294/4733 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28763 event pairs, 24 based on Foata normal form. 98/3517 useless extension candidates. Maximal degree in co-relation 105987. Up to 3716 conditions per place. [2022-12-12 21:30:59,414 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1296 selfloop transitions, 1110 changer transitions 24/2434 dead transitions. [2022-12-12 21:30:59,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1121 places, 2434 transitions, 136097 flow [2022-12-12 21:30:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-12 21:30:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-12 21:30:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 492 transitions. [2022-12-12 21:30:59,416 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2679738562091503 [2022-12-12 21:30:59,416 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1089 predicate places. [2022-12-12 21:30:59,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 1121 places, 2434 transitions, 136097 flow [2022-12-12 21:30:59,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1121 places, 2410 transitions, 134753 flow [2022-12-12 21:30:59,493 INFO L495 AbstractCegarLoop]: Abstraction has has 1121 places, 2410 transitions, 134753 flow [2022-12-12 21:30:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:30:59,493 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:30:59,493 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:30:59,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 21:30:59,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 21:30:59,698 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:30:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:30:59,698 INFO L85 PathProgramCache]: Analyzing trace with hash -603628012, now seen corresponding path program 2 times [2022-12-12 21:30:59,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:30:59,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156397176] [2022-12-12 21:30:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:30:59,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:30:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:00,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:00,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156397176] [2022-12-12 21:31:00,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156397176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:00,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981628289] [2022-12-12 21:31:00,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:31:00,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:00,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:00,344 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:00,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 21:31:00,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:31:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:31:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:00,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:00,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:00,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981628289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:00,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:00,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:31:00,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892901962] [2022-12-12 21:31:00,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:00,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:31:00,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:31:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:31:00,907 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:00,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1121 places, 2410 transitions, 134753 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:00,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:00,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:31:05,667 INFO L130 PetriNetUnfolder]: 2388/4909 cut-off events. [2022-12-12 21:31:05,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:31:05,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113924 conditions, 4909 events. 2388/4909 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29653 event pairs, 24 based on Foata normal form. 98/3633 useless extension candidates. Maximal degree in co-relation 113833. Up to 3856 conditions per place. [2022-12-12 21:31:05,720 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1334 selfloop transitions, 1164 changer transitions 24/2526 dead transitions. [2022-12-12 21:31:05,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1191 places, 2526 transitions, 146293 flow [2022-12-12 21:31:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-12 21:31:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-12-12 21:31:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 516 transitions. [2022-12-12 21:31:05,722 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26917057902973396 [2022-12-12 21:31:05,726 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1159 predicate places. [2022-12-12 21:31:05,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 1191 places, 2526 transitions, 146293 flow [2022-12-12 21:31:05,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1191 places, 2502 transitions, 144901 flow [2022-12-12 21:31:05,912 INFO L495 AbstractCegarLoop]: Abstraction has has 1191 places, 2502 transitions, 144901 flow [2022-12-12 21:31:05,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:05,912 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:31:05,912 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:31:05,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 21:31:06,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:06,120 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:31:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:31:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1717110950, now seen corresponding path program 3 times [2022-12-12 21:31:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:31:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500701487] [2022-12-12 21:31:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:06,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:31:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:06,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:06,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500701487] [2022-12-12 21:31:06,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500701487] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:06,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160813130] [2022-12-12 21:31:06,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 21:31:06,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:06,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:06,735 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:06,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 21:31:06,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-12-12 21:31:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:31:06,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:06,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:07,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160813130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:07,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:07,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:31:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532525945] [2022-12-12 21:31:07,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:07,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:31:07,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:31:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:31:07,301 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:07,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1191 places, 2502 transitions, 144901 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:07,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:07,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:07,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:31:12,395 INFO L130 PetriNetUnfolder]: 2480/5076 cut-off events. [2022-12-12 21:31:12,395 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:31:12,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121928 conditions, 5076 events. 2480/5076 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31180 event pairs, 24 based on Foata normal form. 98/3740 useless extension candidates. Maximal degree in co-relation 121834. Up to 3992 conditions per place. [2022-12-12 21:31:12,450 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1374 selfloop transitions, 1212 changer transitions 24/2614 dead transitions. [2022-12-12 21:31:12,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1260 places, 2614 transitions, 156617 flow [2022-12-12 21:31:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-12 21:31:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-12-12 21:31:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 506 transitions. [2022-12-12 21:31:12,465 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2677248677248677 [2022-12-12 21:31:12,466 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1228 predicate places. [2022-12-12 21:31:12,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 1260 places, 2614 transitions, 156617 flow [2022-12-12 21:31:12,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1260 places, 2590 transitions, 155177 flow [2022-12-12 21:31:12,558 INFO L495 AbstractCegarLoop]: Abstraction has has 1260 places, 2590 transitions, 155177 flow [2022-12-12 21:31:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:12,559 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:31:12,559 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:31:12,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 21:31:12,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 21:31:12,763 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:31:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:31:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1175294571, now seen corresponding path program 1 times [2022-12-12 21:31:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:31:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049399373] [2022-12-12 21:31:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:31:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049399373] [2022-12-12 21:31:13,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049399373] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008792876] [2022-12-12 21:31:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:13,470 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 21:31:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:13,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:13,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:14,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008792876] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:14,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:14,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:31:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810317834] [2022-12-12 21:31:14,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:14,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:31:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:14,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:31:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:31:14,107 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:14,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1260 places, 2590 transitions, 155177 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:14,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:14,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:14,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:31:20,102 INFO L130 PetriNetUnfolder]: 2570/5236 cut-off events. [2022-12-12 21:31:20,102 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:31:20,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130077 conditions, 5236 events. 2570/5236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 32286 event pairs, 24 based on Foata normal form. 98/3840 useless extension candidates. Maximal degree in co-relation 129980. Up to 4124 conditions per place. [2022-12-12 21:31:20,159 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1408 selfloop transitions, 1262 changer transitions 24/2698 dead transitions. [2022-12-12 21:31:20,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1332 places, 2698 transitions, 167045 flow [2022-12-12 21:31:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-12 21:31:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-12-12 21:31:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 530 transitions. [2022-12-12 21:31:20,160 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2688990360223237 [2022-12-12 21:31:20,161 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1300 predicate places. [2022-12-12 21:31:20,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 1332 places, 2698 transitions, 167045 flow [2022-12-12 21:31:20,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1332 places, 2674 transitions, 165557 flow [2022-12-12 21:31:20,252 INFO L495 AbstractCegarLoop]: Abstraction has has 1332 places, 2674 transitions, 165557 flow [2022-12-12 21:31:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:20,252 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:31:20,252 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:31:20,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-12 21:31:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:20,456 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:31:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:31:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -973057692, now seen corresponding path program 5 times [2022-12-12 21:31:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:31:20,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380866702] [2022-12-12 21:31:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:20,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:31:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:21,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:21,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380866702] [2022-12-12 21:31:21,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380866702] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:21,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713430332] [2022-12-12 21:31:21,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 21:31:21,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:21,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:21,033 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:21,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 21:31:21,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-12-12 21:31:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:31:21,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:21,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:21,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:21,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713430332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:21,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:21,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:31:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146605535] [2022-12-12 21:31:21,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:21,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:31:21,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:31:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:31:21,626 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:21,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1332 places, 2674 transitions, 165557 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:21,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:21,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:21,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:31:27,654 INFO L130 PetriNetUnfolder]: 2654/5378 cut-off events. [2022-12-12 21:31:27,654 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:31:27,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138100 conditions, 5378 events. 2654/5378 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33285 event pairs, 24 based on Foata normal form. 98/3922 useless extension candidates. Maximal degree in co-relation 138000. Up to 4244 conditions per place. [2022-12-12 21:31:27,713 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1428 selfloop transitions, 1314 changer transitions 24/2770 dead transitions. [2022-12-12 21:31:27,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1405 places, 2770 transitions, 177041 flow [2022-12-12 21:31:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-12 21:31:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-12-12 21:31:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 534 transitions. [2022-12-12 21:31:27,715 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2672672672672673 [2022-12-12 21:31:27,715 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1373 predicate places. [2022-12-12 21:31:27,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 1405 places, 2770 transitions, 177041 flow [2022-12-12 21:31:27,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1405 places, 2746 transitions, 175505 flow [2022-12-12 21:31:27,815 INFO L495 AbstractCegarLoop]: Abstraction has has 1405 places, 2746 transitions, 175505 flow [2022-12-12 21:31:27,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:27,816 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:31:27,816 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:31:27,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 21:31:28,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-12 21:31:28,021 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:31:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:31:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1888139180, now seen corresponding path program 6 times [2022-12-12 21:31:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:31:28,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143046796] [2022-12-12 21:31:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:28,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:31:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:28,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143046796] [2022-12-12 21:31:28,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143046796] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315001709] [2022-12-12 21:31:28,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 21:31:28,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:28,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:28,610 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:28,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 21:31:28,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-12-12 21:31:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:31:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:28,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:29,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315001709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:29,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:29,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:31:29,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783493361] [2022-12-12 21:31:29,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:29,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:31:29,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:29,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:31:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:31:29,256 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:29,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1405 places, 2746 transitions, 175505 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:29,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:29,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:29,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:31:36,846 INFO L130 PetriNetUnfolder]: 2736/5512 cut-off events. [2022-12-12 21:31:36,847 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:31:36,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146227 conditions, 5512 events. 2736/5512 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 33717 event pairs, 24 based on Foata normal form. 98/3996 useless extension candidates. Maximal degree in co-relation 146124. Up to 4360 conditions per place. [2022-12-12 21:31:36,914 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1454 selfloop transitions, 1356 changer transitions 24/2838 dead transitions. [2022-12-12 21:31:36,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1481 places, 2838 transitions, 187061 flow [2022-12-12 21:31:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-12 21:31:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-12-12 21:31:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 558 transitions. [2022-12-12 21:31:36,915 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2683982683982684 [2022-12-12 21:31:36,916 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1449 predicate places. [2022-12-12 21:31:36,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 1481 places, 2838 transitions, 187061 flow [2022-12-12 21:31:37,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1481 places, 2814 transitions, 185477 flow [2022-12-12 21:31:37,177 INFO L495 AbstractCegarLoop]: Abstraction has has 1481 places, 2814 transitions, 185477 flow [2022-12-12 21:31:37,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:37,177 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:31:37,177 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:31:37,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-12 21:31:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:37,378 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:31:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:31:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1675467354, now seen corresponding path program 7 times [2022-12-12 21:31:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:31:37,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970993601] [2022-12-12 21:31:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:31:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:38,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:38,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970993601] [2022-12-12 21:31:38,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970993601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:38,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664114765] [2022-12-12 21:31:38,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 21:31:38,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:38,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:38,086 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:38,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 21:31:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:38,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:38,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:38,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:38,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664114765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:38,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:38,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:31:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433642436] [2022-12-12 21:31:38,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:38,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:31:38,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:31:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:31:38,674 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:38,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1481 places, 2814 transitions, 185477 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:38,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:38,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:38,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:31:45,041 INFO L130 PetriNetUnfolder]: 2816/5635 cut-off events. [2022-12-12 21:31:45,042 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:31:45,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154443 conditions, 5635 events. 2816/5635 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34855 event pairs, 24 based on Foata normal form. 98/4059 useless extension candidates. Maximal degree in co-relation 154337. Up to 4472 conditions per place. [2022-12-12 21:31:45,107 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1482 selfloop transitions, 1392 changer transitions 24/2902 dead transitions. [2022-12-12 21:31:45,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1556 places, 2902 transitions, 197081 flow [2022-12-12 21:31:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-12 21:31:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-12-12 21:31:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 548 transitions. [2022-12-12 21:31:45,109 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26705653021442494 [2022-12-12 21:31:45,109 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1524 predicate places. [2022-12-12 21:31:45,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 1556 places, 2902 transitions, 197081 flow [2022-12-12 21:31:45,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1556 places, 2878 transitions, 195449 flow [2022-12-12 21:31:45,225 INFO L495 AbstractCegarLoop]: Abstraction has has 1556 places, 2878 transitions, 195449 flow [2022-12-12 21:31:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:45,225 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:31:45,225 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:31:45,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 21:31:45,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:45,430 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:31:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:31:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1061464272, now seen corresponding path program 8 times [2022-12-12 21:31:45,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:31:45,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911026520] [2022-12-12 21:31:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:31:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:46,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911026520] [2022-12-12 21:31:46,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911026520] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:46,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224112637] [2022-12-12 21:31:46,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:31:46,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:46,052 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:46,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 21:31:46,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:31:46,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:31:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:46,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:46,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224112637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:46,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:46,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-12-12 21:31:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625145314] [2022-12-12 21:31:46,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 21:31:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 21:31:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 21:31:46,702 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:46,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1556 places, 2878 transitions, 195449 flow. Second operand has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:46,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:46,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:46,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:31:53,182 INFO L130 PetriNetUnfolder]: 2892/5756 cut-off events. [2022-12-12 21:31:53,183 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:31:53,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162609 conditions, 5756 events. 2892/5756 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35691 event pairs, 24 based on Foata normal form. 98/4120 useless extension candidates. Maximal degree in co-relation 162500. Up to 4576 conditions per place. [2022-12-12 21:31:53,376 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1498 selfloop transitions, 1432 changer transitions 24/2958 dead transitions. [2022-12-12 21:31:53,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1633 places, 2958 transitions, 206797 flow [2022-12-12 21:31:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-12 21:31:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-12-12 21:31:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 562 transitions. [2022-12-12 21:31:53,378 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2668566001899335 [2022-12-12 21:31:53,378 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1601 predicate places. [2022-12-12 21:31:53,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 1633 places, 2958 transitions, 206797 flow [2022-12-12 21:31:53,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1633 places, 2934 transitions, 205117 flow [2022-12-12 21:31:53,495 INFO L495 AbstractCegarLoop]: Abstraction has has 1633 places, 2934 transitions, 205117 flow [2022-12-12 21:31:53,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.090909090909091) internal successors, (224), 44 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:53,499 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:31:53,499 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:31:53,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-12 21:31:53,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:53,703 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:31:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:31:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash -918429460, now seen corresponding path program 9 times [2022-12-12 21:31:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:31:53,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975045244] [2022-12-12 21:31:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:31:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:31:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:31:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:54,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:31:54,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975045244] [2022-12-12 21:31:54,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975045244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:31:54,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110596644] [2022-12-12 21:31:54,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 21:31:54,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:31:54,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:31:54,344 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:31:54,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 21:31:54,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-12-12 21:31:54,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:31:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:31:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:31:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:54,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:31:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:31:54,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110596644] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:31:54,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:31:54,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:31:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263195433] [2022-12-12 21:31:54,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:31:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:31:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:31:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:31:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1548, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:31:54,966 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:31:54,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1633 places, 2934 transitions, 205117 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:31:54,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:31:54,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:31:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:32:01,922 INFO L130 PetriNetUnfolder]: 2955/5838 cut-off events. [2022-12-12 21:32:01,923 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:32:01,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170139 conditions, 5838 events. 2955/5838 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35592 event pairs, 45 based on Foata normal form. 98/4145 useless extension candidates. Maximal degree in co-relation 170027. Up to 4657 conditions per place. [2022-12-12 21:32:01,996 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1465 selfloop transitions, 1495 changer transitions 27/2991 dead transitions. [2022-12-12 21:32:01,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1717 places, 2991 transitions, 215081 flow [2022-12-12 21:32:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-12 21:32:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-12-12 21:32:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 635 transitions. [2022-12-12 21:32:01,999 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2766884531590414 [2022-12-12 21:32:01,999 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1685 predicate places. [2022-12-12 21:32:01,999 INFO L82 GeneralOperation]: Start removeDead. Operand has 1717 places, 2991 transitions, 215081 flow [2022-12-12 21:32:02,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1717 places, 2964 transitions, 213137 flow [2022-12-12 21:32:02,228 INFO L495 AbstractCegarLoop]: Abstraction has has 1717 places, 2964 transitions, 213137 flow [2022-12-12 21:32:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:32:02,229 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:32:02,229 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:32:02,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 21:32:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-12 21:32:02,434 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:32:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:32:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash -918148600, now seen corresponding path program 10 times [2022-12-12 21:32:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:32:02,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6528048] [2022-12-12 21:32:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:32:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:32:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:32:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:03,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:32:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6528048] [2022-12-12 21:32:03,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6528048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:32:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880464295] [2022-12-12 21:32:03,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 21:32:03,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:32:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:32:03,003 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:32:03,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-12 21:32:03,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 21:32:03,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:32:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:32:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:32:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:03,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:32:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:03,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880464295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:32:03,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:32:03,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2022-12-12 21:32:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955214968] [2022-12-12 21:32:03,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:32:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 21:32:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:32:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 21:32:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 21:32:03,624 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:32:03,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1717 places, 2964 transitions, 213137 flow. Second operand has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:32:03,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:32:03,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:32:03,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:32:11,933 INFO L130 PetriNetUnfolder]: 3052/5993 cut-off events. [2022-12-12 21:32:11,933 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:32:11,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180316 conditions, 5993 events. 3052/5993 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 36946 event pairs, 45 based on Foata normal form. 98/4219 useless extension candidates. Maximal degree in co-relation 180201. Up to 4805 conditions per place. [2022-12-12 21:32:12,010 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1460 selfloop transitions, 1513 changer transitions 30/3007 dead transitions. [2022-12-12 21:32:12,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1801 places, 3007 transitions, 222239 flow [2022-12-12 21:32:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-12 21:32:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-12-12 21:32:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 633 transitions. [2022-12-12 21:32:12,012 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2758169934640523 [2022-12-12 21:32:12,012 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1769 predicate places. [2022-12-12 21:32:12,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 1801 places, 3007 transitions, 222239 flow [2022-12-12 21:32:12,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1801 places, 2977 transitions, 220019 flow [2022-12-12 21:32:12,137 INFO L495 AbstractCegarLoop]: Abstraction has has 1801 places, 2977 transitions, 220019 flow [2022-12-12 21:32:12,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.111111111111111) internal successors, (230), 45 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:32:12,137 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:32:12,137 INFO L214 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:32:12,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-12 21:32:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-12 21:32:12,343 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:32:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:32:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2059827690, now seen corresponding path program 11 times [2022-12-12 21:32:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:32:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115750609] [2022-12-12 21:32:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:32:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:32:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:32:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:32:12,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115750609] [2022-12-12 21:32:12,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115750609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:32:12,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551368206] [2022-12-12 21:32:12,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 21:32:12,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:32:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:32:12,932 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:32:12,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-12 21:32:13,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-12-12 21:32:13,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:32:13,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 21:32:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:32:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:13,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:32:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:13,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551368206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:32:13,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:32:13,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 85 [2022-12-12 21:32:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358665674] [2022-12-12 21:32:13,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:32:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-12 21:32:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:32:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-12 21:32:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1745, Invalid=5737, Unknown=0, NotChecked=0, Total=7482 [2022-12-12 21:32:13,633 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-12 21:32:13,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1801 places, 2977 transitions, 220019 flow. Second operand has 87 states, 87 states have (on average 5.126436781609195) internal successors, (446), 87 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:32:13,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:32:13,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-12 21:32:13,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:32:22,141 INFO L130 PetriNetUnfolder]: 3325/6488 cut-off events. [2022-12-12 21:32:22,141 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:32:22,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203080 conditions, 6488 events. 3325/6488 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 40448 event pairs, 45 based on Foata normal form. 147/4451 useless extension candidates. Maximal degree in co-relation 202962. Up to 5276 conditions per place. [2022-12-12 21:32:22,218 INFO L137 encePairwiseOnDemand]: 16/27 looper letters, 1519 selfloop transitions, 1229 changer transitions 312/3064 dead transitions. [2022-12-12 21:32:22,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1888 places, 3064 transitions, 232577 flow [2022-12-12 21:32:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-12 21:32:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-12-12 21:32:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 687 transitions. [2022-12-12 21:32:22,219 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28914141414141414 [2022-12-12 21:32:22,220 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1856 predicate places. [2022-12-12 21:32:22,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 1888 places, 3064 transitions, 232577 flow [2022-12-12 21:32:22,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1888 places, 2752 transitions, 208865 flow [2022-12-12 21:32:22,382 INFO L495 AbstractCegarLoop]: Abstraction has has 1888 places, 2752 transitions, 208865 flow [2022-12-12 21:32:22,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 5.126436781609195) internal successors, (446), 87 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:32:22,382 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:32:22,382 INFO L214 CegarLoopForPetriNet]: trace histogram [21, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:32:22,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-12 21:32:22,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:32:22,588 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:32:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:32:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1604024407, now seen corresponding path program 1 times [2022-12-12 21:32:22,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:32:22,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186711192] [2022-12-12 21:32:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:32:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:32:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:32:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:22,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:32:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186711192] [2022-12-12 21:32:22,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186711192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:32:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537662912] [2022-12-12 21:32:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:32:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:32:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:32:22,832 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:32:22,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-12 21:32:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:32:22,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-12 21:32:22,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:32:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:32:22,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 21:32:22,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537662912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:32:22,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 21:32:22,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2022-12-12 21:32:22,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311182852] [2022-12-12 21:32:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:32:22,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 21:32:22,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:32:22,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 21:32:22,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-12-12 21:32:22,974 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2022-12-12 21:32:22,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1888 places, 2752 transitions, 208865 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:32:22,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:32:22,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2022-12-12 21:32:22,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:33:12,954 INFO L130 PetriNetUnfolder]: 19029/46107 cut-off events. [2022-12-12 21:33:12,954 INFO L131 PetriNetUnfolder]: For 3112962/3112962 co-relation queries the response was YES. [2022-12-12 21:33:13,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152548 conditions, 46107 events. 19029/46107 cut-off events. For 3112962/3112962 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 512326 event pairs, 4658 based on Foata normal form. 2324/48422 useless extension candidates. Maximal degree in co-relation 1152427. Up to 28819 conditions per place. [2022-12-12 21:33:13,283 INFO L137 encePairwiseOnDemand]: 21/27 looper letters, 0 selfloop transitions, 0 changer transitions 19293/19293 dead transitions. [2022-12-12 21:33:13,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1903 places, 19293 transitions, 1503215 flow [2022-12-12 21:33:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 21:33:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 21:33:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 233 transitions. [2022-12-12 21:33:13,293 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3752012882447665 [2022-12-12 21:33:13,293 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1871 predicate places. [2022-12-12 21:33:13,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 1903 places, 19293 transitions, 1503215 flow [2022-12-12 21:33:13,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2022-12-12 21:33:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2022-12-12 21:33:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:33:13,426 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 21:33:13,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 21:33:13,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 21:33:13,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-12 21:33:13,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-12 21:33:13,632 INFO L445 BasicCegarLoop]: Path program histogram: [11, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:33:13,643 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 21:33:13,643 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 21:33:13,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 09:33:13 BasicIcfg [2022-12-12 21:33:13,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 21:33:13,652 INFO L158 Benchmark]: Toolchain (without parser) took 212605.07ms. Allocated memory was 205.5MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 180.1MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-12 21:33:13,652 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 205.5MB. Free memory was 181.4MB in the beginning and 181.3MB in the end (delta: 82.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 21:33:13,652 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.24ms. Allocated memory is still 205.5MB. Free memory was 180.1MB in the beginning and 159.9MB in the end (delta: 20.2MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-12-12 21:33:13,652 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.01ms. Allocated memory is still 205.5MB. Free memory was 159.8MB in the beginning and 157.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 21:33:13,652 INFO L158 Benchmark]: Boogie Preprocessor took 31.66ms. Allocated memory is still 205.5MB. Free memory was 157.8MB in the beginning and 156.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 21:33:13,655 INFO L158 Benchmark]: RCFGBuilder took 344.93ms. Allocated memory is still 205.5MB. Free memory was 156.2MB in the beginning and 143.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 21:33:13,656 INFO L158 Benchmark]: TraceAbstraction took 211848.83ms. Allocated memory was 205.5MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 142.5MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. [2022-12-12 21:33:13,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 205.5MB. Free memory was 181.4MB in the beginning and 181.3MB in the end (delta: 82.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 325.24ms. Allocated memory is still 205.5MB. Free memory was 180.1MB in the beginning and 159.9MB in the end (delta: 20.2MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 49.01ms. Allocated memory is still 205.5MB. Free memory was 159.8MB in the beginning and 157.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.66ms. Allocated memory is still 205.5MB. Free memory was 157.8MB in the beginning and 156.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 344.93ms. Allocated memory is still 205.5MB. Free memory was 156.2MB in the beginning and 143.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 211848.83ms. Allocated memory was 205.5MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 142.5MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 66 PlacesBefore, 32 PlacesAfterwards, 64 TransitionsBefore, 27 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 30 ConcurrentYvCompositions, 3 ChoiceCompositions, 51 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1048, independent: 1025, independent conditional: 1025, independent unconditional: 0, dependent: 23, dependent conditional: 23, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1048, independent: 1025, independent conditional: 0, independent unconditional: 1025, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1048, independent: 1025, independent conditional: 0, independent unconditional: 1025, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1048, independent: 1025, independent conditional: 0, independent unconditional: 1025, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 824, independent: 814, independent conditional: 0, independent unconditional: 814, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 824, independent: 814, independent conditional: 0, independent unconditional: 814, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 24, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1048, independent: 211, independent conditional: 0, independent unconditional: 211, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 824, unknown conditional: 0, unknown unconditional: 824] , Statistics on independence cache: Total cache size (in pairs): 1517, Positive cache size: 1507, Positive conditional cache size: 0, Positive unconditional cache size: 1507, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 2.4s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 211.8s, OverallIterations: 38, TraceHistogramMax: 21, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 164.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18717 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18717 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 8.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 7148 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19946 IncrementalHoareTripleChecker+Invalid, 27094 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7148 mSolverCounterUnsat, 0 mSDtfsCounter, 19946 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5323 GetRequests, 1416 SyntacticMatches, 882 SemanticMatches, 3025 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105713 ImplicationChecksByTransitivity, 47.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=220019occurred in iteration=36, InterpolantAutomatonStates: 1917, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 38 MinimizatonAttempts, 1616461 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 32.3s InterpolantComputationTime, 2652 NumberOfCodeBlocks, 2652 NumberOfCodeBlocksAsserted, 262 NumberOfCheckSat, 3805 ConstructedInterpolants, 0 QuantifiedInterpolants, 17782 SizeOfPredicates, 1000 NumberOfNonLiveVariables, 8789 ConjunctsInSsa, 1214 ConjunctsInUnsatCore, 103 InterpolantComputations, 6 PerfectInterpolantSequences, 780/27527 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-12 21:33:13,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...