/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 22:50:49,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 22:50:49,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 22:50:49,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 22:50:49,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 22:50:49,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 22:50:49,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 22:50:49,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 22:50:49,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 22:50:49,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 22:50:49,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 22:50:49,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 22:50:49,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 22:50:49,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 22:50:49,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 22:50:49,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 22:50:49,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 22:50:49,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 22:50:49,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 22:50:49,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 22:50:49,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 22:50:49,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 22:50:49,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 22:50:49,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 22:50:49,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 22:50:49,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 22:50:49,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 22:50:49,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 22:50:49,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 22:50:49,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 22:50:49,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 22:50:49,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 22:50:49,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 22:50:49,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 22:50:49,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 22:50:49,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 22:50:49,470 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-VariableLbe.epf [2023-01-27 22:50:49,501 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 22:50:49,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 22:50:49,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 22:50:49,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 22:50:49,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 22:50:49,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 22:50:49,503 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 22:50:49,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 22:50:49,504 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 22:50:49,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 22:50:49,505 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 22:50:49,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 22:50:49,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 22:50:49,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 22:50:49,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 22:50:49,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 22:50:49,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:50:49,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 22:50:49,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 22:50:49,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 22:50:49,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 22:50:49,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 22:50:49,507 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 22:50:49,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 22:50:49,507 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 22:50:49,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 22:50:49,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 22:50:49,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 22:50:49,767 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 22:50:49,767 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 22:50:49,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-01-27 22:50:50,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 22:50:51,014 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 22:50:51,015 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-01-27 22:50:51,022 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef8ed79cc/bb84472d30514b66aeb1a4cae1cb587d/FLAGf253938f3 [2023-01-27 22:50:51,035 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef8ed79cc/bb84472d30514b66aeb1a4cae1cb587d [2023-01-27 22:50:51,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 22:50:51,039 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 22:50:51,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 22:50:51,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 22:50:51,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 22:50:51,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d94826a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51, skipping insertion in model container [2023-01-27 22:50:51,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 22:50:51,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 22:50:51,241 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2023-01-27 22:50:51,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:50:51,265 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 22:50:51,292 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2023-01-27 22:50:51,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:50:51,315 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:50:51,315 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:50:51,320 INFO L208 MainTranslator]: Completed translation [2023-01-27 22:50:51,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51 WrapperNode [2023-01-27 22:50:51,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 22:50:51,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 22:50:51,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 22:50:51,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 22:50:51,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,350 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 124 [2023-01-27 22:50:51,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 22:50:51,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 22:50:51,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 22:50:51,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 22:50:51,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 22:50:51,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 22:50:51,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 22:50:51,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 22:50:51,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (1/1) ... [2023-01-27 22:50:51,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:50:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:50:51,413 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) [2023-01-27 22:50:51,420 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 [2023-01-27 22:50:51,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 22:50:51,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 22:50:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 22:50:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 22:50:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 22:50:51,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 22:50:51,450 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 22:50:51,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 22:50:51,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 22:50:51,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 22:50:51,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 22:50:51,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 22:50:51,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 22:50:51,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 22:50:51,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 22:50:51,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 22:50:51,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 22:50:51,455 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 22:50:51,531 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 22:50:51,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 22:50:51,843 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 22:50:51,874 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 22:50:51,874 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-27 22:50:51,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:50:51 BoogieIcfgContainer [2023-01-27 22:50:51,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 22:50:51,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 22:50:51,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 22:50:51,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 22:50:51,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:50:51" (1/3) ... [2023-01-27 22:50:51,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ae9637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:50:51, skipping insertion in model container [2023-01-27 22:50:51,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:50:51" (2/3) ... [2023-01-27 22:50:51,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ae9637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:50:51, skipping insertion in model container [2023-01-27 22:50:51,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:50:51" (3/3) ... [2023-01-27 22:50:51,882 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-01-27 22:50:51,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 22:50:51,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 22:50:51,897 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 22:50:51,959 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 22:50:51,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 174 transitions, 372 flow [2023-01-27 22:50:52,050 INFO L130 PetriNetUnfolder]: 16/171 cut-off events. [2023-01-27 22:50:52,050 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 22:50:52,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 16/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 119 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-01-27 22:50:52,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 174 transitions, 372 flow [2023-01-27 22:50:52,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 161 transitions, 340 flow [2023-01-27 22:50:52,063 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 22:50:52,070 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 161 transitions, 340 flow [2023-01-27 22:50:52,073 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 161 transitions, 340 flow [2023-01-27 22:50:52,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 161 transitions, 340 flow [2023-01-27 22:50:52,111 INFO L130 PetriNetUnfolder]: 16/161 cut-off events. [2023-01-27 22:50:52,112 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 22:50:52,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 161 events. 16/161 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-01-27 22:50:52,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-01-27 22:50:56,889 INFO L134 LiptonReduction]: Checked pairs total: 2460 [2023-01-27 22:50:56,889 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-01-27 22:50:56,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 22:50:56,921 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;@62dc0d6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 22:50:56,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 22:50:56,935 INFO L130 PetriNetUnfolder]: 6/28 cut-off events. [2023-01-27 22:50:56,936 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 22:50:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:50:56,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:50:56,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:50:56,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:50:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash 290379782, now seen corresponding path program 1 times [2023-01-27 22:50:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:50:56,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309599950] [2023-01-27 22:50:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:50:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:50:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:50:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:57,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:50:57,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309599950] [2023-01-27 22:50:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309599950] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:50:57,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:50:57,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 22:50:57,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047536008] [2023-01-27 22:50:57,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:50:57,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:50:57,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:50:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:50:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:50:57,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 328 [2023-01-27 22:50:57,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:57,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:50:57,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 328 [2023-01-27 22:50:57,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:50:58,067 INFO L130 PetriNetUnfolder]: 853/1153 cut-off events. [2023-01-27 22:50:58,067 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-01-27 22:50:58,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 1153 events. 853/1153 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4189 event pairs, 310 based on Foata normal form. 1/690 useless extension candidates. Maximal degree in co-relation 1073. Up to 740 conditions per place. [2023-01-27 22:50:58,076 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 44 selfloop transitions, 5 changer transitions 1/53 dead transitions. [2023-01-27 22:50:58,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 242 flow [2023-01-27 22:50:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:50:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:50:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 527 transitions. [2023-01-27 22:50:58,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016768292682927 [2023-01-27 22:50:58,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 527 transitions. [2023-01-27 22:50:58,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 527 transitions. [2023-01-27 22:50:58,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:50:58,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 527 transitions. [2023-01-27 22:50:58,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,104 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,106 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 4 states and 527 transitions. [2023-01-27 22:50:58,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 242 flow [2023-01-27 22:50:58,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 22:50:58,112 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 98 flow [2023-01-27 22:50:58,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-01-27 22:50:58,116 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-01-27 22:50:58,117 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 98 flow [2023-01-27 22:50:58,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:50:58,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:50:58,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 22:50:58,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:50:58,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:50:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash 26416036, now seen corresponding path program 1 times [2023-01-27 22:50:58,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:50:58,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317771829] [2023-01-27 22:50:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:50:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:50:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:50:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:58,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:50:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317771829] [2023-01-27 22:50:58,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317771829] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:50:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020829679] [2023-01-27 22:50:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:50:58,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:50:58,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:50:58,261 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) [2023-01-27 22:50:58,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 22:50:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:50:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:50:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:50:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:58,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:50:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:58,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020829679] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:50:58,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:50:58,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-01-27 22:50:58,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761119855] [2023-01-27 22:50:58,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:50:58,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:50:58,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:50:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:50:58,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-01-27 22:50:58,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 328 [2023-01-27 22:50:58,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:50:58,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 328 [2023-01-27 22:50:58,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:50:58,724 INFO L130 PetriNetUnfolder]: 1545/2124 cut-off events. [2023-01-27 22:50:58,724 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2023-01-27 22:50:58,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4701 conditions, 2124 events. 1545/2124 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 9164 event pairs, 757 based on Foata normal form. 0/1464 useless extension candidates. Maximal degree in co-relation 4470. Up to 1045 conditions per place. [2023-01-27 22:50:58,739 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 51 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-01-27 22:50:58,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 280 flow [2023-01-27 22:50:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:50:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:50:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-01-27 22:50:58,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40426829268292686 [2023-01-27 22:50:58,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-01-27 22:50:58,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-01-27 22:50:58,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:50:58,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-01-27 22:50:58,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,749 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,749 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 98 flow. Second operand 5 states and 663 transitions. [2023-01-27 22:50:58,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 280 flow [2023-01-27 22:50:58,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 59 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 22:50:58,751 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 112 flow [2023-01-27 22:50:58,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-01-27 22:50:58,752 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-01-27 22:50:58,752 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 112 flow [2023-01-27 22:50:58,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:58,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:50:58,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:50:58,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 22:50:58,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:50:58,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:50:58,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:50:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash 232148464, now seen corresponding path program 1 times [2023-01-27 22:50:58,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:50:58,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897330439] [2023-01-27 22:50:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:50:58,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:50:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:50:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:59,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:50:59,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897330439] [2023-01-27 22:50:59,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897330439] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:50:59,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:50:59,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 22:50:59,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107245590] [2023-01-27 22:50:59,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:50:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:50:59,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:50:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:50:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 22:50:59,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:50:59,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:50:59,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:50:59,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:50:59,363 INFO L130 PetriNetUnfolder]: 1172/1618 cut-off events. [2023-01-27 22:50:59,363 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-01-27 22:50:59,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3414 conditions, 1618 events. 1172/1618 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6354 event pairs, 521 based on Foata normal form. 67/1175 useless extension candidates. Maximal degree in co-relation 2060. Up to 793 conditions per place. [2023-01-27 22:50:59,372 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 60 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-01-27 22:50:59,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 324 flow [2023-01-27 22:50:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:50:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:50:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 656 transitions. [2023-01-27 22:50:59,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-01-27 22:50:59,375 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 656 transitions. [2023-01-27 22:50:59,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 656 transitions. [2023-01-27 22:50:59,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:50:59,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 656 transitions. [2023-01-27 22:50:59,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,381 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 112 flow. Second operand 5 states and 656 transitions. [2023-01-27 22:50:59,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 324 flow [2023-01-27 22:50:59,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 319 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-27 22:50:59,384 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 120 flow [2023-01-27 22:50:59,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-01-27 22:50:59,386 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-01-27 22:50:59,387 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 120 flow [2023-01-27 22:50:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:50:59,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:50:59,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 22:50:59,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:50:59,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:50:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1046469637, now seen corresponding path program 1 times [2023-01-27 22:50:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:50:59,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822729074] [2023-01-27 22:50:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:50:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:50:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:50:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:50:59,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:50:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822729074] [2023-01-27 22:50:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822729074] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:50:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748644251] [2023-01-27 22:50:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:50:59,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:50:59,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:50:59,530 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) [2023-01-27 22:50:59,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 22:50:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:50:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 22:50:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:50:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:50:59,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:50:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:50:59,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748644251] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:50:59,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:50:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-27 22:50:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233770674] [2023-01-27 22:50:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:50:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:50:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:50:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:50:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 22:50:59,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:50:59,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:50:59,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:50:59,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:50:59,906 INFO L130 PetriNetUnfolder]: 1052/1471 cut-off events. [2023-01-27 22:50:59,906 INFO L131 PetriNetUnfolder]: For 418/442 co-relation queries the response was YES. [2023-01-27 22:50:59,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 1471 events. 1052/1471 cut-off events. For 418/442 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6024 event pairs, 377 based on Foata normal form. 24/1116 useless extension candidates. Maximal degree in co-relation 1868. Up to 498 conditions per place. [2023-01-27 22:50:59,915 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 69 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-01-27 22:50:59,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 388 flow [2023-01-27 22:50:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 22:50:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 22:50:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 782 transitions. [2023-01-27 22:50:59,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39735772357723576 [2023-01-27 22:50:59,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 782 transitions. [2023-01-27 22:50:59,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 782 transitions. [2023-01-27 22:50:59,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:50:59,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 782 transitions. [2023-01-27 22:50:59,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,924 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 120 flow. Second operand 6 states and 782 transitions. [2023-01-27 22:50:59,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 388 flow [2023-01-27 22:50:59,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 79 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 22:50:59,927 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2023-01-27 22:50:59,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-01-27 22:50:59,927 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-01-27 22:50:59,928 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2023-01-27 22:50:59,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:50:59,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:50:59,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:50:59,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 22:51:00,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-27 22:51:00,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:00,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash -709973367, now seen corresponding path program 1 times [2023-01-27 22:51:00,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:00,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47086045] [2023-01-27 22:51:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:00,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47086045] [2023-01-27 22:51:00,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47086045] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:51:00,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:51:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 22:51:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395035032] [2023-01-27 22:51:00,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:51:00,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:51:00,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:51:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 22:51:00,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:00,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:00,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:00,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:00,446 INFO L130 PetriNetUnfolder]: 611/889 cut-off events. [2023-01-27 22:51:00,446 INFO L131 PetriNetUnfolder]: For 634/704 co-relation queries the response was YES. [2023-01-27 22:51:00,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 889 events. 611/889 cut-off events. For 634/704 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3455 event pairs, 290 based on Foata normal form. 70/891 useless extension candidates. Maximal degree in co-relation 1681. Up to 614 conditions per place. [2023-01-27 22:51:00,452 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 26 selfloop transitions, 4 changer transitions 30/62 dead transitions. [2023-01-27 22:51:00,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 326 flow [2023-01-27 22:51:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:51:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:51:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-01-27 22:51:00,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3957317073170732 [2023-01-27 22:51:00,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-01-27 22:51:00,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-01-27 22:51:00,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:00,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-01-27 22:51:00,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,459 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,459 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 5 states and 649 transitions. [2023-01-27 22:51:00,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 326 flow [2023-01-27 22:51:00,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-27 22:51:00,462 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 127 flow [2023-01-27 22:51:00,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2023-01-27 22:51:00,463 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-01-27 22:51:00,463 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 127 flow [2023-01-27 22:51:00,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:00,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 22:51:00,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:00,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash 877946428, now seen corresponding path program 1 times [2023-01-27 22:51:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:00,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520357087] [2023-01-27 22:51:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:51:00,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520357087] [2023-01-27 22:51:00,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520357087] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:00,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123804004] [2023-01-27 22:51:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:00,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:00,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:00,620 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) [2023-01-27 22:51:00,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 22:51:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:00,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 22:51:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:51:00,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:51:00,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123804004] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:00,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:51:00,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-27 22:51:00,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602408480] [2023-01-27 22:51:00,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:51:00,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:51:00,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:51:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 22:51:00,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:00,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:00,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:00,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:00,913 INFO L130 PetriNetUnfolder]: 563/780 cut-off events. [2023-01-27 22:51:00,913 INFO L131 PetriNetUnfolder]: For 486/568 co-relation queries the response was YES. [2023-01-27 22:51:00,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 780 events. 563/780 cut-off events. For 486/568 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2694 event pairs, 237 based on Foata normal form. 124/807 useless extension candidates. Maximal degree in co-relation 2179. Up to 609 conditions per place. [2023-01-27 22:51:00,918 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 40 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-01-27 22:51:00,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 265 flow [2023-01-27 22:51:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:51:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:51:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 632 transitions. [2023-01-27 22:51:00,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2023-01-27 22:51:00,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 632 transitions. [2023-01-27 22:51:00,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 632 transitions. [2023-01-27 22:51:00,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:00,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 632 transitions. [2023-01-27 22:51:00,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,927 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,927 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 127 flow. Second operand 5 states and 632 transitions. [2023-01-27 22:51:00,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 265 flow [2023-01-27 22:51:00,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 235 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-01-27 22:51:00,931 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 121 flow [2023-01-27 22:51:00,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-01-27 22:51:00,933 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-01-27 22:51:00,933 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 121 flow [2023-01-27 22:51:00,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:00,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:00,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:00,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:01,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:01,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash -510812246, now seen corresponding path program 1 times [2023-01-27 22:51:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:01,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521882911] [2023-01-27 22:51:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:01,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:51:01,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521882911] [2023-01-27 22:51:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521882911] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507736000] [2023-01-27 22:51:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:01,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:01,299 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) [2023-01-27 22:51:01,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 22:51:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 22:51:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:51:01,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:51:01,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507736000] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:01,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:51:01,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-27 22:51:01,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451174660] [2023-01-27 22:51:01,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:51:01,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:51:01,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:51:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 22:51:01,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:01,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:01,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:01,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:01,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:01,597 INFO L130 PetriNetUnfolder]: 515/725 cut-off events. [2023-01-27 22:51:01,597 INFO L131 PetriNetUnfolder]: For 631/815 co-relation queries the response was YES. [2023-01-27 22:51:01,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 725 events. 515/725 cut-off events. For 631/815 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2316 event pairs, 191 based on Foata normal form. 184/806 useless extension candidates. Maximal degree in co-relation 2025. Up to 395 conditions per place. [2023-01-27 22:51:01,602 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 39 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-01-27 22:51:01,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 262 flow [2023-01-27 22:51:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:51:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:51:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 631 transitions. [2023-01-27 22:51:01,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847560975609756 [2023-01-27 22:51:01,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 631 transitions. [2023-01-27 22:51:01,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 631 transitions. [2023-01-27 22:51:01,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:01,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 631 transitions. [2023-01-27 22:51:01,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:01,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:01,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:01,608 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 121 flow. Second operand 5 states and 631 transitions. [2023-01-27 22:51:01,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 262 flow [2023-01-27 22:51:01,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 251 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-27 22:51:01,610 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 144 flow [2023-01-27 22:51:01,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-01-27 22:51:01,611 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-01-27 22:51:01,611 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 144 flow [2023-01-27 22:51:01,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:01,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:01,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:01,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:01,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:01,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:01,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:01,818 INFO L85 PathProgramCache]: Analyzing trace with hash -990804847, now seen corresponding path program 1 times [2023-01-27 22:51:01,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:01,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718057418] [2023-01-27 22:51:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:51:02,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:02,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718057418] [2023-01-27 22:51:02,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718057418] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:51:02,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:51:02,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 22:51:02,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874956172] [2023-01-27 22:51:02,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:51:02,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 22:51:02,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 22:51:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 22:51:02,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-27 22:51:02,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 144.5) internal successors, (867), 6 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:02,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:02,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-27 22:51:02,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:02,354 INFO L130 PetriNetUnfolder]: 1096/1546 cut-off events. [2023-01-27 22:51:02,354 INFO L131 PetriNetUnfolder]: For 1643/1861 co-relation queries the response was YES. [2023-01-27 22:51:02,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 1546 events. 1096/1546 cut-off events. For 1643/1861 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5671 event pairs, 121 based on Foata normal form. 294/1662 useless extension candidates. Maximal degree in co-relation 4774. Up to 530 conditions per place. [2023-01-27 22:51:02,362 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 89 selfloop transitions, 17 changer transitions 13/120 dead transitions. [2023-01-27 22:51:02,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 120 transitions, 700 flow [2023-01-27 22:51:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 22:51:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 22:51:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1370 transitions. [2023-01-27 22:51:02,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640921409214092 [2023-01-27 22:51:02,367 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1370 transitions. [2023-01-27 22:51:02,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1370 transitions. [2023-01-27 22:51:02,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:02,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1370 transitions. [2023-01-27 22:51:02,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.22222222222223) internal successors, (1370), 9 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:02,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:02,374 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:02,375 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 144 flow. Second operand 9 states and 1370 transitions. [2023-01-27 22:51:02,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 120 transitions, 700 flow [2023-01-27 22:51:02,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 120 transitions, 691 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 22:51:02,380 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 292 flow [2023-01-27 22:51:02,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=292, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-01-27 22:51:02,385 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2023-01-27 22:51:02,385 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 292 flow [2023-01-27 22:51:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.5) internal successors, (867), 6 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:02,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:02,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 22:51:02,386 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:02,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -849126380, now seen corresponding path program 2 times [2023-01-27 22:51:02,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:02,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280980005] [2023-01-27 22:51:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:02,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:51:02,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:02,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280980005] [2023-01-27 22:51:02,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280980005] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:02,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387730808] [2023-01-27 22:51:02,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:51:02,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:02,523 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) [2023-01-27 22:51:02,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 22:51:02,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:51:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:51:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:51:02,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:51:02,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387730808] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:02,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:02,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 22:51:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104831170] [2023-01-27 22:51:02,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:02,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 22:51:02,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 22:51:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-27 22:51:02,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:02,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 292 flow. Second operand has 14 states, 14 states have (on average 121.14285714285714) internal successors, (1696), 14 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:02,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:02,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:03,132 INFO L130 PetriNetUnfolder]: 1332/1958 cut-off events. [2023-01-27 22:51:03,133 INFO L131 PetriNetUnfolder]: For 5356/5834 co-relation queries the response was YES. [2023-01-27 22:51:03,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7451 conditions, 1958 events. 1332/1958 cut-off events. For 5356/5834 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8155 event pairs, 468 based on Foata normal form. 492/2442 useless extension candidates. Maximal degree in co-relation 5385. Up to 1028 conditions per place. [2023-01-27 22:51:03,144 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 57 selfloop transitions, 7 changer transitions 52/120 dead transitions. [2023-01-27 22:51:03,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 120 transitions, 888 flow [2023-01-27 22:51:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 22:51:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 22:51:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1146 transitions. [2023-01-27 22:51:03,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882113821138211 [2023-01-27 22:51:03,148 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1146 transitions. [2023-01-27 22:51:03,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1146 transitions. [2023-01-27 22:51:03,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:03,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1146 transitions. [2023-01-27 22:51:03,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.33333333333333) internal successors, (1146), 9 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:03,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:03,155 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:03,155 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 292 flow. Second operand 9 states and 1146 transitions. [2023-01-27 22:51:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 120 transitions, 888 flow [2023-01-27 22:51:03,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 864 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-01-27 22:51:03,171 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 330 flow [2023-01-27 22:51:03,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-01-27 22:51:03,172 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-01-27 22:51:03,172 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 330 flow [2023-01-27 22:51:03,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 121.14285714285714) internal successors, (1696), 14 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:03,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:03,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:03,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:03,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:03,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:03,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash 123513301, now seen corresponding path program 3 times [2023-01-27 22:51:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:03,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253253399] [2023-01-27 22:51:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 22:51:03,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:03,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253253399] [2023-01-27 22:51:03,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253253399] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:03,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679547012] [2023-01-27 22:51:03,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:51:03,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:03,553 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) [2023-01-27 22:51:03,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 22:51:03,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:51:03,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:03,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:51:03,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 22:51:03,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 22:51:03,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679547012] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:03,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:03,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-01-27 22:51:03,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076616022] [2023-01-27 22:51:03,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:03,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:51:03,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:51:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:51:03,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:03,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 330 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:03,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:03,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:03,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:04,119 INFO L130 PetriNetUnfolder]: 1403/2019 cut-off events. [2023-01-27 22:51:04,119 INFO L131 PetriNetUnfolder]: For 5477/5691 co-relation queries the response was YES. [2023-01-27 22:51:04,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 2019 events. 1403/2019 cut-off events. For 5477/5691 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7974 event pairs, 432 based on Foata normal form. 302/2309 useless extension candidates. Maximal degree in co-relation 7864. Up to 1316 conditions per place. [2023-01-27 22:51:04,134 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 91 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2023-01-27 22:51:04,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 884 flow [2023-01-27 22:51:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 22:51:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 22:51:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1001 transitions. [2023-01-27 22:51:04,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38147865853658536 [2023-01-27 22:51:04,137 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1001 transitions. [2023-01-27 22:51:04,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1001 transitions. [2023-01-27 22:51:04,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:04,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1001 transitions. [2023-01-27 22:51:04,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:04,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 328.0) internal successors, (2952), 9 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:04,144 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 328.0) internal successors, (2952), 9 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:04,144 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 330 flow. Second operand 8 states and 1001 transitions. [2023-01-27 22:51:04,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 884 flow [2023-01-27 22:51:04,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 846 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-01-27 22:51:04,159 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 336 flow [2023-01-27 22:51:04,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-01-27 22:51:04,159 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-01-27 22:51:04,159 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 336 flow [2023-01-27 22:51:04,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:04,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:04,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:04,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:04,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:04,371 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:04,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash -18919933, now seen corresponding path program 4 times [2023-01-27 22:51:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007344082] [2023-01-27 22:51:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 22:51:04,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007344082] [2023-01-27 22:51:04,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007344082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:04,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995802824] [2023-01-27 22:51:04,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:51:04,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:04,538 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) [2023-01-27 22:51:04,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 22:51:04,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:51:04,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:04,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 22:51:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:51:04,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:51:04,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995802824] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:04,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:04,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-27 22:51:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183173726] [2023-01-27 22:51:04,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:04,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 22:51:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 22:51:04,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-01-27 22:51:04,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 328 [2023-01-27 22:51:04,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 336 flow. Second operand has 13 states, 13 states have (on average 118.3076923076923) internal successors, (1538), 13 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:04,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:04,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 328 [2023-01-27 22:51:04,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:05,486 INFO L130 PetriNetUnfolder]: 2106/2946 cut-off events. [2023-01-27 22:51:05,486 INFO L131 PetriNetUnfolder]: For 8707/8747 co-relation queries the response was YES. [2023-01-27 22:51:05,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12356 conditions, 2946 events. 2106/2946 cut-off events. For 8707/8747 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11180 event pairs, 61 based on Foata normal form. 78/3024 useless extension candidates. Maximal degree in co-relation 12310. Up to 950 conditions per place. [2023-01-27 22:51:05,508 INFO L137 encePairwiseOnDemand]: 317/328 looper letters, 167 selfloop transitions, 37 changer transitions 0/207 dead transitions. [2023-01-27 22:51:05,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 207 transitions, 1724 flow [2023-01-27 22:51:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 22:51:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 22:51:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2083 transitions. [2023-01-27 22:51:05,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37356527977044474 [2023-01-27 22:51:05,513 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2083 transitions. [2023-01-27 22:51:05,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2083 transitions. [2023-01-27 22:51:05,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:05,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2083 transitions. [2023-01-27 22:51:05,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 122.52941176470588) internal successors, (2083), 17 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:05,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:05,526 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:05,526 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 336 flow. Second operand 17 states and 2083 transitions. [2023-01-27 22:51:05,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 207 transitions, 1724 flow [2023-01-27 22:51:05,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 207 transitions, 1693 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-01-27 22:51:05,548 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 678 flow [2023-01-27 22:51:05,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=678, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-01-27 22:51:05,549 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-01-27 22:51:05,549 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 678 flow [2023-01-27 22:51:05,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 118.3076923076923) internal successors, (1538), 13 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:05,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:05,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:05,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:05,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:05,758 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:05,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash -625333260, now seen corresponding path program 5 times [2023-01-27 22:51:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011792379] [2023-01-27 22:51:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 22:51:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011792379] [2023-01-27 22:51:05,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011792379] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:05,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758785401] [2023-01-27 22:51:05,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:51:05,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:05,972 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) [2023-01-27 22:51:05,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 22:51:06,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:51:06,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:06,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:51:06,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 22:51:06,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 22:51:06,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758785401] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:06,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:06,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-01-27 22:51:06,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577964269] [2023-01-27 22:51:06,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:51:06,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:51:06,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:51:06,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-27 22:51:06,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 678 flow. Second operand has 15 states, 15 states have (on average 143.13333333333333) internal successors, (2147), 15 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:06,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:06,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-27 22:51:06,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:07,536 INFO L130 PetriNetUnfolder]: 4224/6102 cut-off events. [2023-01-27 22:51:07,537 INFO L131 PetriNetUnfolder]: For 24215/24301 co-relation queries the response was YES. [2023-01-27 22:51:07,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 6102 events. 4224/6102 cut-off events. For 24215/24301 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 28704 event pairs, 548 based on Foata normal form. 390/6492 useless extension candidates. Maximal degree in co-relation 26499. Up to 1525 conditions per place. [2023-01-27 22:51:07,571 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 232 selfloop transitions, 54 changer transitions 24/314 dead transitions. [2023-01-27 22:51:07,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 314 transitions, 2629 flow [2023-01-27 22:51:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:51:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:51:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2887 transitions. [2023-01-27 22:51:07,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46325417201540436 [2023-01-27 22:51:07,578 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2887 transitions. [2023-01-27 22:51:07,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2887 transitions. [2023-01-27 22:51:07,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:07,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2887 transitions. [2023-01-27 22:51:07,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 151.94736842105263) internal successors, (2887), 19 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:07,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 328.0) internal successors, (6560), 20 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:07,593 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 328.0) internal successors, (6560), 20 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:07,593 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 678 flow. Second operand 19 states and 2887 transitions. [2023-01-27 22:51:07,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 314 transitions, 2629 flow [2023-01-27 22:51:07,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 314 transitions, 2472 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-01-27 22:51:07,685 INFO L231 Difference]: Finished difference. Result has 106 places, 116 transitions, 1185 flow [2023-01-27 22:51:07,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1185, PETRI_PLACES=106, PETRI_TRANSITIONS=116} [2023-01-27 22:51:07,686 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 73 predicate places. [2023-01-27 22:51:07,686 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 116 transitions, 1185 flow [2023-01-27 22:51:07,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 143.13333333333333) internal successors, (2147), 15 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:07,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:07,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:07,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:07,893 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,SelfDestructingSolverStorable11 [2023-01-27 22:51:07,893 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:07,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1824849498, now seen corresponding path program 6 times [2023-01-27 22:51:07,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:07,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681095125] [2023-01-27 22:51:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:07,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 22:51:08,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681095125] [2023-01-27 22:51:08,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681095125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478814063] [2023-01-27 22:51:08,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:51:08,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:08,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:08,141 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) [2023-01-27 22:51:08,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 22:51:08,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:51:08,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:51:08,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 22:51:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 22:51:08,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478814063] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:08,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:08,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-01-27 22:51:08,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419541590] [2023-01-27 22:51:08,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:08,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 22:51:08,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:08,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 22:51:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-27 22:51:08,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-27 22:51:08,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 116 transitions, 1185 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:08,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:08,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-27 22:51:08,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:09,672 INFO L130 PetriNetUnfolder]: 5322/7712 cut-off events. [2023-01-27 22:51:09,672 INFO L131 PetriNetUnfolder]: For 37213/37321 co-relation queries the response was YES. [2023-01-27 22:51:09,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37890 conditions, 7712 events. 5322/7712 cut-off events. For 37213/37321 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 37613 event pairs, 319 based on Foata normal form. 184/7895 useless extension candidates. Maximal degree in co-relation 37831. Up to 1943 conditions per place. [2023-01-27 22:51:09,729 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 208 selfloop transitions, 77 changer transitions 24/313 dead transitions. [2023-01-27 22:51:09,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 313 transitions, 2910 flow [2023-01-27 22:51:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 22:51:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 22:51:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2584 transitions. [2023-01-27 22:51:09,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2023-01-27 22:51:09,738 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2584 transitions. [2023-01-27 22:51:09,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2584 transitions. [2023-01-27 22:51:09,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:09,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2584 transitions. [2023-01-27 22:51:09,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:09,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:09,750 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:09,750 INFO L175 Difference]: Start difference. First operand has 106 places, 116 transitions, 1185 flow. Second operand 17 states and 2584 transitions. [2023-01-27 22:51:09,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 313 transitions, 2910 flow [2023-01-27 22:51:09,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 313 transitions, 2831 flow, removed 37 selfloop flow, removed 1 redundant places. [2023-01-27 22:51:09,950 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1647 flow [2023-01-27 22:51:09,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1647, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2023-01-27 22:51:09,951 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2023-01-27 22:51:09,951 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1647 flow [2023-01-27 22:51:09,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:09,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:09,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:09,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:10,157 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,SelfDestructingSolverStorable12 [2023-01-27 22:51:10,157 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:10,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1957586289, now seen corresponding path program 7 times [2023-01-27 22:51:10,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:10,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464694369] [2023-01-27 22:51:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:10,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 22:51:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464694369] [2023-01-27 22:51:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464694369] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886636063] [2023-01-27 22:51:10,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:51:10,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:10,349 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) [2023-01-27 22:51:10,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 22:51:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:51:10,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 22:51:10,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 22:51:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886636063] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:10,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:10,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 22:51:10,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703784190] [2023-01-27 22:51:10,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:10,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 22:51:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 22:51:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-27 22:51:10,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:10,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1647 flow. Second operand has 19 states, 19 states have (on average 120.84210526315789) internal successors, (2296), 19 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:10,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:10,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:10,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:12,110 INFO L130 PetriNetUnfolder]: 7658/11250 cut-off events. [2023-01-27 22:51:12,111 INFO L131 PetriNetUnfolder]: For 75140/75711 co-relation queries the response was YES. [2023-01-27 22:51:12,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57205 conditions, 11250 events. 7658/11250 cut-off events. For 75140/75711 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 62070 event pairs, 2159 based on Foata normal form. 693/11801 useless extension candidates. Maximal degree in co-relation 54064. Up to 5118 conditions per place. [2023-01-27 22:51:12,192 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 163 selfloop transitions, 9 changer transitions 130/321 dead transitions. [2023-01-27 22:51:12,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 321 transitions, 4057 flow [2023-01-27 22:51:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 22:51:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 22:51:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1645 transitions. [2023-01-27 22:51:12,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857879924953096 [2023-01-27 22:51:12,199 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1645 transitions. [2023-01-27 22:51:12,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1645 transitions. [2023-01-27 22:51:12,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:12,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1645 transitions. [2023-01-27 22:51:12,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 126.53846153846153) internal successors, (1645), 13 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:12,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 328.0) internal successors, (4592), 14 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:12,210 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 328.0) internal successors, (4592), 14 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:12,210 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1647 flow. Second operand 13 states and 1645 transitions. [2023-01-27 22:51:12,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 321 transitions, 4057 flow [2023-01-27 22:51:12,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 321 transitions, 3807 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-01-27 22:51:12,601 INFO L231 Difference]: Finished difference. Result has 138 places, 140 transitions, 1608 flow [2023-01-27 22:51:12,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1608, PETRI_PLACES=138, PETRI_TRANSITIONS=140} [2023-01-27 22:51:12,602 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 105 predicate places. [2023-01-27 22:51:12,602 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 140 transitions, 1608 flow [2023-01-27 22:51:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 120.84210526315789) internal successors, (2296), 19 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:12,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:12,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:12,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:12,803 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,SelfDestructingSolverStorable13 [2023-01-27 22:51:12,803 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:12,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2013782112, now seen corresponding path program 8 times [2023-01-27 22:51:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:12,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346654905] [2023-01-27 22:51:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:12,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-01-27 22:51:13,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346654905] [2023-01-27 22:51:13,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346654905] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678966935] [2023-01-27 22:51:13,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:51:13,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:13,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:13,065 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) [2023-01-27 22:51:13,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 22:51:13,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:51:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:51:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-01-27 22:51:13,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-01-27 22:51:13,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678966935] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:13,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:13,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-27 22:51:13,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97555189] [2023-01-27 22:51:13,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:13,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:51:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:51:13,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:51:13,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:13,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 140 transitions, 1608 flow. Second operand has 20 states, 20 states have (on average 120.2) internal successors, (2404), 20 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:13,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:13,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:13,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:14,471 INFO L130 PetriNetUnfolder]: 6434/9178 cut-off events. [2023-01-27 22:51:14,471 INFO L131 PetriNetUnfolder]: For 57039/57404 co-relation queries the response was YES. [2023-01-27 22:51:14,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47464 conditions, 9178 events. 6434/9178 cut-off events. For 57039/57404 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 45952 event pairs, 1922 based on Foata normal form. 635/9672 useless extension candidates. Maximal degree in co-relation 47382. Up to 5194 conditions per place. [2023-01-27 22:51:14,524 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 276 selfloop transitions, 17 changer transitions 60/371 dead transitions. [2023-01-27 22:51:14,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 371 transitions, 5036 flow [2023-01-27 22:51:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 22:51:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 22:51:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1370 transitions. [2023-01-27 22:51:14,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37971175166297116 [2023-01-27 22:51:14,527 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1370 transitions. [2023-01-27 22:51:14,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1370 transitions. [2023-01-27 22:51:14,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:14,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1370 transitions. [2023-01-27 22:51:14,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.54545454545455) internal successors, (1370), 11 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:14,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:14,534 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:14,534 INFO L175 Difference]: Start difference. First operand has 138 places, 140 transitions, 1608 flow. Second operand 11 states and 1370 transitions. [2023-01-27 22:51:14,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 371 transitions, 5036 flow [2023-01-27 22:51:14,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 371 transitions, 4894 flow, removed 63 selfloop flow, removed 7 redundant places. [2023-01-27 22:51:14,844 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1421 flow [2023-01-27 22:51:14,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1421, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2023-01-27 22:51:14,845 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 102 predicate places. [2023-01-27 22:51:14,845 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1421 flow [2023-01-27 22:51:14,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.2) internal successors, (2404), 20 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:14,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:14,846 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:14,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:15,051 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,SelfDestructingSolverStorable14 [2023-01-27 22:51:15,051 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:15,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash -816507476, now seen corresponding path program 9 times [2023-01-27 22:51:15,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:15,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442923322] [2023-01-27 22:51:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:15,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 22:51:15,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:15,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442923322] [2023-01-27 22:51:15,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442923322] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:15,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412906874] [2023-01-27 22:51:15,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:51:15,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:15,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:15,223 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) [2023-01-27 22:51:15,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 22:51:15,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:51:15,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:15,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:51:15,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 22:51:15,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 22:51:15,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412906874] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:15,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:15,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-27 22:51:15,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227799125] [2023-01-27 22:51:15,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:15,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:51:15,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:15,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:51:15,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:51:15,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:15,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1421 flow. Second operand has 20 states, 20 states have (on average 120.75) internal successors, (2415), 20 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:15,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:15,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:15,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:16,644 INFO L130 PetriNetUnfolder]: 5413/7679 cut-off events. [2023-01-27 22:51:16,644 INFO L131 PetriNetUnfolder]: For 46210/46350 co-relation queries the response was YES. [2023-01-27 22:51:16,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42148 conditions, 7679 events. 5413/7679 cut-off events. For 46210/46350 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 35293 event pairs, 594 based on Foata normal form. 178/7842 useless extension candidates. Maximal degree in co-relation 42070. Up to 4104 conditions per place. [2023-01-27 22:51:16,694 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 148 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2023-01-27 22:51:16,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 201 transitions, 2416 flow [2023-01-27 22:51:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 22:51:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 22:51:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1500 transitions. [2023-01-27 22:51:16,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2023-01-27 22:51:16,697 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1500 transitions. [2023-01-27 22:51:16,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1500 transitions. [2023-01-27 22:51:16,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:16,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1500 transitions. [2023-01-27 22:51:16,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:16,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 328.0) internal successors, (4264), 13 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:16,704 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 328.0) internal successors, (4264), 13 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:16,704 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1421 flow. Second operand 12 states and 1500 transitions. [2023-01-27 22:51:16,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 201 transitions, 2416 flow [2023-01-27 22:51:16,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 201 transitions, 2264 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-01-27 22:51:16,962 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 1589 flow [2023-01-27 22:51:16,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1589, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2023-01-27 22:51:16,963 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 103 predicate places. [2023-01-27 22:51:16,963 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 1589 flow [2023-01-27 22:51:16,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.75) internal successors, (2415), 20 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:16,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:16,963 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:16,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:17,169 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,SelfDestructingSolverStorable15 [2023-01-27 22:51:17,169 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:17,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1011768859, now seen corresponding path program 10 times [2023-01-27 22:51:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:17,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553902522] [2023-01-27 22:51:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:17,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 22:51:17,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:17,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553902522] [2023-01-27 22:51:17,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553902522] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:17,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929451519] [2023-01-27 22:51:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:51:17,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:17,448 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) [2023-01-27 22:51:17,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 22:51:17,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:51:17,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:51:17,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 22:51:17,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 22:51:17,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929451519] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:17,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:17,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-01-27 22:51:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072157072] [2023-01-27 22:51:17,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:17,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 22:51:17,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 22:51:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-01-27 22:51:17,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-27 22:51:17,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 1589 flow. Second operand has 17 states, 17 states have (on average 143.05882352941177) internal successors, (2432), 17 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:17,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:17,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-27 22:51:17,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:19,540 INFO L130 PetriNetUnfolder]: 7450/10528 cut-off events. [2023-01-27 22:51:19,541 INFO L131 PetriNetUnfolder]: For 58408/58530 co-relation queries the response was YES. [2023-01-27 22:51:19,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55880 conditions, 10528 events. 7450/10528 cut-off events. For 58408/58530 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 49706 event pairs, 449 based on Foata normal form. 210/10738 useless extension candidates. Maximal degree in co-relation 55803. Up to 2092 conditions per place. [2023-01-27 22:51:19,709 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 342 selfloop transitions, 104 changer transitions 52/502 dead transitions. [2023-01-27 22:51:19,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 502 transitions, 4850 flow [2023-01-27 22:51:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 22:51:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 22:51:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4253 transitions. [2023-01-27 22:51:19,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630879790940767 [2023-01-27 22:51:19,719 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4253 transitions. [2023-01-27 22:51:19,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4253 transitions. [2023-01-27 22:51:19,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:19,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4253 transitions. [2023-01-27 22:51:19,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 151.89285714285714) internal successors, (4253), 28 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:19,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 328.0) internal successors, (9512), 29 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:19,735 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 328.0) internal successors, (9512), 29 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:19,735 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 1589 flow. Second operand 28 states and 4253 transitions. [2023-01-27 22:51:19,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 502 transitions, 4850 flow [2023-01-27 22:51:19,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 502 transitions, 4785 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-27 22:51:19,985 INFO L231 Difference]: Finished difference. Result has 161 places, 169 transitions, 2319 flow [2023-01-27 22:51:19,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2319, PETRI_PLACES=161, PETRI_TRANSITIONS=169} [2023-01-27 22:51:19,986 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 128 predicate places. [2023-01-27 22:51:19,986 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 169 transitions, 2319 flow [2023-01-27 22:51:19,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.05882352941177) internal successors, (2432), 17 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:19,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:19,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:20,192 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,SelfDestructingSolverStorable16 [2023-01-27 22:51:20,192 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:20,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1542560206, now seen corresponding path program 11 times [2023-01-27 22:51:20,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:20,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821484398] [2023-01-27 22:51:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:20,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-01-27 22:51:20,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:20,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821484398] [2023-01-27 22:51:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821484398] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306526324] [2023-01-27 22:51:20,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:51:20,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:20,395 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) [2023-01-27 22:51:20,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 22:51:20,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-27 22:51:20,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:51:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-01-27 22:51:20,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-01-27 22:51:21,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306526324] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:21,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:21,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-01-27 22:51:21,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636712209] [2023-01-27 22:51:21,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:21,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 22:51:21,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 22:51:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-01-27 22:51:21,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:21,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 169 transitions, 2319 flow. Second operand has 24 states, 24 states have (on average 120.54166666666667) internal successors, (2893), 24 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:21,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:21,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:21,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:23,078 INFO L130 PetriNetUnfolder]: 11441/16325 cut-off events. [2023-01-27 22:51:23,078 INFO L131 PetriNetUnfolder]: For 131859/132679 co-relation queries the response was YES. [2023-01-27 22:51:23,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92371 conditions, 16325 events. 11441/16325 cut-off events. For 131859/132679 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 87768 event pairs, 2900 based on Foata normal form. 810/16929 useless extension candidates. Maximal degree in co-relation 87325. Up to 6780 conditions per place. [2023-01-27 22:51:23,154 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 205 selfloop transitions, 11 changer transitions 226/464 dead transitions. [2023-01-27 22:51:23,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 464 transitions, 6616 flow [2023-01-27 22:51:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 22:51:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 22:51:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2145 transitions. [2023-01-27 22:51:23,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38468436154949787 [2023-01-27 22:51:23,157 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2145 transitions. [2023-01-27 22:51:23,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2145 transitions. [2023-01-27 22:51:23,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:23,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2145 transitions. [2023-01-27 22:51:23,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 126.17647058823529) internal successors, (2145), 17 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:23,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:23,164 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:23,164 INFO L175 Difference]: Start difference. First operand has 161 places, 169 transitions, 2319 flow. Second operand 17 states and 2145 transitions. [2023-01-27 22:51:23,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 464 transitions, 6616 flow [2023-01-27 22:51:23,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 464 transitions, 6013 flow, removed 134 selfloop flow, removed 15 redundant places. [2023-01-27 22:51:23,855 INFO L231 Difference]: Finished difference. Result has 168 places, 171 transitions, 2176 flow [2023-01-27 22:51:23,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2176, PETRI_PLACES=168, PETRI_TRANSITIONS=171} [2023-01-27 22:51:23,855 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 135 predicate places. [2023-01-27 22:51:23,855 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 171 transitions, 2176 flow [2023-01-27 22:51:23,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 120.54166666666667) internal successors, (2893), 24 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:23,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:23,857 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:23,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:24,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:24,065 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:24,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2025698849, now seen corresponding path program 12 times [2023-01-27 22:51:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621272875] [2023-01-27 22:51:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 22:51:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:24,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621272875] [2023-01-27 22:51:24,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621272875] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:24,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667163824] [2023-01-27 22:51:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:51:24,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:24,315 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) [2023-01-27 22:51:24,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 22:51:24,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-27 22:51:24,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:51:24,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 22:51:25,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 22:51:25,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667163824] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:25,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:25,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-01-27 22:51:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506633903] [2023-01-27 22:51:25,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 22:51:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 22:51:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-01-27 22:51:25,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:25,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 171 transitions, 2176 flow. Second operand has 25 states, 25 states have (on average 120.36) internal successors, (3009), 25 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:25,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:25,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:25,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:26,771 INFO L130 PetriNetUnfolder]: 8448/11779 cut-off events. [2023-01-27 22:51:26,771 INFO L131 PetriNetUnfolder]: For 89172/89811 co-relation queries the response was YES. [2023-01-27 22:51:26,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65503 conditions, 11779 events. 8448/11779 cut-off events. For 89172/89811 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 57514 event pairs, 2151 based on Foata normal form. 856/12458 useless extension candidates. Maximal degree in co-relation 65406. Up to 5793 conditions per place. [2023-01-27 22:51:26,828 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 477 selfloop transitions, 20 changer transitions 0/518 dead transitions. [2023-01-27 22:51:26,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 518 transitions, 7364 flow [2023-01-27 22:51:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 22:51:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 22:51:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1739 transitions. [2023-01-27 22:51:26,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787020905923345 [2023-01-27 22:51:26,832 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1739 transitions. [2023-01-27 22:51:26,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1739 transitions. [2023-01-27 22:51:26,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:26,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1739 transitions. [2023-01-27 22:51:26,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.21428571428571) internal successors, (1739), 14 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:26,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 328.0) internal successors, (4920), 15 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:26,838 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 328.0) internal successors, (4920), 15 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:26,838 INFO L175 Difference]: Start difference. First operand has 168 places, 171 transitions, 2176 flow. Second operand 14 states and 1739 transitions. [2023-01-27 22:51:26,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 518 transitions, 7364 flow [2023-01-27 22:51:27,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 518 transitions, 7065 flow, removed 139 selfloop flow, removed 9 redundant places. [2023-01-27 22:51:27,199 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 2145 flow [2023-01-27 22:51:27,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2145, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2023-01-27 22:51:27,200 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 130 predicate places. [2023-01-27 22:51:27,200 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 2145 flow [2023-01-27 22:51:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 120.36) internal successors, (3009), 25 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:27,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:27,200 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:27,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 22:51:27,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:27,401 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:27,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 421770685, now seen corresponding path program 13 times [2023-01-27 22:51:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753645463] [2023-01-27 22:51:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:27,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 22:51:27,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:27,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753645463] [2023-01-27 22:51:27,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753645463] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:27,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837871597] [2023-01-27 22:51:27,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:51:27,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:27,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:27,640 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) [2023-01-27 22:51:27,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 22:51:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:51:27,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 22:51:28,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 22:51:28,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837871597] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:28,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:28,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-01-27 22:51:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886775222] [2023-01-27 22:51:28,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:28,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 22:51:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:28,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 22:51:28,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-01-27 22:51:28,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-27 22:51:28,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 2145 flow. Second operand has 25 states, 25 states have (on average 120.6) internal successors, (3015), 25 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:28,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:28,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-27 22:51:28,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:29,767 INFO L130 PetriNetUnfolder]: 8881/12471 cut-off events. [2023-01-27 22:51:29,767 INFO L131 PetriNetUnfolder]: For 81543/81703 co-relation queries the response was YES. [2023-01-27 22:51:29,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71775 conditions, 12471 events. 8881/12471 cut-off events. For 81543/81703 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 58901 event pairs, 891 based on Foata normal form. 210/12680 useless extension candidates. Maximal degree in co-relation 71684. Up to 5977 conditions per place. [2023-01-27 22:51:29,832 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 201 selfloop transitions, 63 changer transitions 0/271 dead transitions. [2023-01-27 22:51:29,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 271 transitions, 3503 flow [2023-01-27 22:51:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 22:51:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 22:51:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1869 transitions. [2023-01-27 22:51:29,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798780487804878 [2023-01-27 22:51:29,835 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1869 transitions. [2023-01-27 22:51:29,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1869 transitions. [2023-01-27 22:51:29,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:29,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1869 transitions. [2023-01-27 22:51:29,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 124.6) internal successors, (1869), 15 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:29,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 328.0) internal successors, (5248), 16 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:29,840 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 328.0) internal successors, (5248), 16 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:29,840 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 2145 flow. Second operand 15 states and 1869 transitions. [2023-01-27 22:51:29,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 271 transitions, 3503 flow [2023-01-27 22:51:30,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 271 transitions, 3385 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-01-27 22:51:30,222 INFO L231 Difference]: Finished difference. Result has 168 places, 181 transitions, 2423 flow [2023-01-27 22:51:30,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2423, PETRI_PLACES=168, PETRI_TRANSITIONS=181} [2023-01-27 22:51:30,222 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 135 predicate places. [2023-01-27 22:51:30,222 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 181 transitions, 2423 flow [2023-01-27 22:51:30,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 120.6) internal successors, (3015), 25 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:30,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:30,223 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:30,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:30,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:30,424 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:30,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1021162570, now seen corresponding path program 14 times [2023-01-27 22:51:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666920721] [2023-01-27 22:51:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:30,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 22:51:30,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:30,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666920721] [2023-01-27 22:51:30,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666920721] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:30,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852089812] [2023-01-27 22:51:30,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:51:30,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:30,681 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) [2023-01-27 22:51:30,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 22:51:30,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:51:30,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:30,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:51:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 22:51:31,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 22:51:31,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852089812] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:31,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:31,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-01-27 22:51:31,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249944001] [2023-01-27 22:51:31,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 22:51:31,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 22:51:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-01-27 22:51:31,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-27 22:51:31,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 181 transitions, 2423 flow. Second operand has 19 states, 19 states have (on average 142.94736842105263) internal successors, (2716), 19 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:31,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:31,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-27 22:51:31,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:34,071 INFO L130 PetriNetUnfolder]: 11936/16724 cut-off events. [2023-01-27 22:51:34,071 INFO L131 PetriNetUnfolder]: For 107878/108036 co-relation queries the response was YES. [2023-01-27 22:51:34,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94725 conditions, 16724 events. 11936/16724 cut-off events. For 107878/108036 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 81503 event pairs, 571 based on Foata normal form. 258/16982 useless extension candidates. Maximal degree in co-relation 94632. Up to 3428 conditions per place. [2023-01-27 22:51:34,168 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 553 selfloop transitions, 159 changer transitions 85/801 dead transitions. [2023-01-27 22:51:34,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 801 transitions, 8120 flow [2023-01-27 22:51:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-27 22:51:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-27 22:51:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6533 transitions. [2023-01-27 22:51:34,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320192853091324 [2023-01-27 22:51:34,175 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6533 transitions. [2023-01-27 22:51:34,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6533 transitions. [2023-01-27 22:51:34,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:34,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6533 transitions. [2023-01-27 22:51:34,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 151.93023255813952) internal successors, (6533), 43 states have internal predecessors, (6533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:34,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 328.0) internal successors, (14432), 44 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:34,193 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 328.0) internal successors, (14432), 44 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:34,193 INFO L175 Difference]: Start difference. First operand has 168 places, 181 transitions, 2423 flow. Second operand 43 states and 6533 transitions. [2023-01-27 22:51:34,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 801 transitions, 8120 flow [2023-01-27 22:51:34,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 801 transitions, 8012 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-01-27 22:51:34,991 INFO L231 Difference]: Finished difference. Result has 206 places, 233 transitions, 3574 flow [2023-01-27 22:51:34,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3574, PETRI_PLACES=206, PETRI_TRANSITIONS=233} [2023-01-27 22:51:34,992 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 173 predicate places. [2023-01-27 22:51:34,992 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 233 transitions, 3574 flow [2023-01-27 22:51:34,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.94736842105263) internal successors, (2716), 19 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:34,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:34,992 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:34,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-27 22:51:35,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:35,193 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:51:35,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1430726769, now seen corresponding path program 15 times [2023-01-27 22:51:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:35,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250419851] [2023-01-27 22:51:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:35,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-27 22:51:35,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:35,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250419851] [2023-01-27 22:51:35,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250419851] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:35,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991470388] [2023-01-27 22:51:35,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:51:35,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:35,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:35,426 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) [2023-01-27 22:51:35,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 22:51:35,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:51:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 22:51:35,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-27 22:51:35,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-27 22:51:36,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991470388] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:36,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:36,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2023-01-27 22:51:36,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865624926] [2023-01-27 22:51:36,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:51:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:51:36,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:51:36,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 328 [2023-01-27 22:51:36,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 233 transitions, 3574 flow. Second operand has 18 states, 18 states have (on average 114.88888888888889) internal successors, (2068), 18 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:36,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:36,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 328 [2023-01-27 22:51:36,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:40,706 INFO L130 PetriNetUnfolder]: 19835/27920 cut-off events. [2023-01-27 22:51:40,706 INFO L131 PetriNetUnfolder]: For 210916/211176 co-relation queries the response was YES. [2023-01-27 22:51:40,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166503 conditions, 27920 events. 19835/27920 cut-off events. For 210916/211176 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 150296 event pairs, 192 based on Foata normal form. 586/28506 useless extension candidates. Maximal degree in co-relation 159348. Up to 5793 conditions per place. [2023-01-27 22:51:40,860 INFO L137 encePairwiseOnDemand]: 314/328 looper letters, 0 selfloop transitions, 0 changer transitions 1270/1270 dead transitions. [2023-01-27 22:51:40,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1270 transitions, 18792 flow [2023-01-27 22:51:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-27 22:51:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-27 22:51:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5852 transitions. [2023-01-27 22:51:40,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641114982578397 [2023-01-27 22:51:40,868 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5852 transitions. [2023-01-27 22:51:40,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5852 transitions. [2023-01-27 22:51:40,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:40,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5852 transitions. [2023-01-27 22:51:40,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 119.42857142857143) internal successors, (5852), 49 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:40,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 328.0) internal successors, (16400), 50 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:40,887 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 328.0) internal successors, (16400), 50 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:40,887 INFO L175 Difference]: Start difference. First operand has 206 places, 233 transitions, 3574 flow. Second operand 49 states and 5852 transitions. [2023-01-27 22:51:40,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1270 transitions, 18792 flow [2023-01-27 22:51:42,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1270 transitions, 16260 flow, removed 293 selfloop flow, removed 32 redundant places. [2023-01-27 22:51:43,004 INFO L231 Difference]: Finished difference. Result has 219 places, 0 transitions, 0 flow [2023-01-27 22:51:43,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=0, PETRI_PLACES=219, PETRI_TRANSITIONS=0} [2023-01-27 22:51:43,005 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 186 predicate places. [2023-01-27 22:51:43,005 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 0 transitions, 0 flow [2023-01-27 22:51:43,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.88888888888889) internal successors, (2068), 18 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:43,008 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-27 22:51:43,008 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-27 22:51:43,008 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-27 22:51:43,008 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-27 22:51:43,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:43,215 INFO L445 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:43,218 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 22:51:43,218 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 22:51:43,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 10:51:43 BasicIcfg [2023-01-27 22:51:43,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 22:51:43,220 INFO L158 Benchmark]: Toolchain (without parser) took 52181.13ms. Allocated memory was 339.7MB in the beginning and 8.3GB in the end (delta: 8.0GB). Free memory was 285.4MB in the beginning and 7.2GB in the end (delta: -6.9GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-01-27 22:51:43,220 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:51:43,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.68ms. Allocated memory is still 339.7MB. Free memory was 285.2MB in the beginning and 317.5MB in the end (delta: -32.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.0GB. [2023-01-27 22:51:43,221 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.30ms. Allocated memory is still 339.7MB. Free memory was 317.5MB in the beginning and 315.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:51:43,221 INFO L158 Benchmark]: Boogie Preprocessor took 31.71ms. Allocated memory is still 339.7MB. Free memory was 315.6MB in the beginning and 314.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:51:43,221 INFO L158 Benchmark]: RCFGBuilder took 492.33ms. Allocated memory is still 339.7MB. Free memory was 313.6MB in the beginning and 294.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 22:51:43,221 INFO L158 Benchmark]: TraceAbstraction took 51342.08ms. Allocated memory was 339.7MB in the beginning and 8.3GB in the end (delta: 8.0GB). Free memory was 294.2MB in the beginning and 7.2GB in the end (delta: -6.9GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-01-27 22:51:43,222 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 278.68ms. Allocated memory is still 339.7MB. Free memory was 285.2MB in the beginning and 317.5MB in the end (delta: -32.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.30ms. Allocated memory is still 339.7MB. Free memory was 317.5MB in the beginning and 315.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.71ms. Allocated memory is still 339.7MB. Free memory was 315.6MB in the beginning and 314.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 492.33ms. Allocated memory is still 339.7MB. Free memory was 313.6MB in the beginning and 294.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 51342.08ms. Allocated memory was 339.7MB in the beginning and 8.3GB in the end (delta: 8.0GB). Free memory was 294.2MB in the beginning and 7.2GB in the end (delta: -6.9GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 155 PlacesBefore, 33 PlacesAfterwards, 161 TransitionsBefore, 29 TransitionsAfterwards, 1720 CoEnabledTransitionPairs, 7 FixpointIterations, 84 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 23 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 154 TotalNumberOfCompositions, 2460 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2032, independent: 1969, independent conditional: 0, independent unconditional: 1969, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 921, independent: 904, independent conditional: 0, independent unconditional: 904, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2032, independent: 1065, independent conditional: 0, independent unconditional: 1065, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 921, unknown conditional: 0, unknown unconditional: 921] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 84, Positive conditional cache size: 0, Positive unconditional cache size: 84, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 103]: 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 7 procedures, 194 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 51.2s, OverallIterations: 22, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 30.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3647 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3647 mSDsluCounter, 232 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 179 mSDsCounter, 234 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9511 IncrementalHoareTripleChecker+Invalid, 9745 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 234 mSolverCounterUnsat, 53 mSDtfsCounter, 9511 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1682 GetRequests, 1158 SyntacticMatches, 51 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3574occurred in iteration=21, InterpolantAutomatonStates: 316, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 1406 NumberOfCodeBlocks, 1386 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2004 ConstructedInterpolants, 0 QuantifiedInterpolants, 5986 SizeOfPredicates, 61 NumberOfNonLiveVariables, 5492 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 58 InterpolantComputations, 8 PerfectInterpolantSequences, 1083/1438 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! [2023-01-27 22:51:43,241 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...