/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-bad-ring-nondet.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:18:04,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:18:04,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:18:04,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:18:04,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:18:04,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:18:04,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:18:04,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:18:04,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:18:04,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:18:04,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:18:04,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:18:04,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:18:04,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:18:04,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:18:04,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:18:04,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:18:04,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:18:04,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:18:04,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:18:04,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:18:04,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:18:04,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:18:04,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:18:04,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:18:04,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:18:04,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:18:04,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:18:04,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:18:04,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:18:04,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:18:04,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:18:04,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:18:04,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:18:04,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:18:04,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:18:04,309 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 21:18:04,327 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:18:04,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:18:04,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:18:04,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:18:04,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:18:04,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:18:04,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:18:04,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:18:04,331 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:18:04,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:18:04,331 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:18:04,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:18:04,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:18:04,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:18:04,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:18:04,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:18:04,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:18:04,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:18:04,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:18:04,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:18:04,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:18:04,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:18:04,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:18:04,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:18:04,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:18:04,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:18:04,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:18:04,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:18:04,523 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:18:04,524 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:18:04,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-01-27 21:18:05,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:18:05,598 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:18:05,598 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-01-27 21:18:05,603 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314b57da3/885e308451874e2a987c2b40586d4a8c/FLAG604a686a8 [2023-01-27 21:18:05,615 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314b57da3/885e308451874e2a987c2b40586d4a8c [2023-01-27 21:18:05,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:18:05,617 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:18:05,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:18:05,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:18:05,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:18:05,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c191fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05, skipping insertion in model container [2023-01-27 21:18:05,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:18:05,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:18:05,745 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-bad-ring-nondet.wvr.c[4085,4098] [2023-01-27 21:18:05,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:18:05,755 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:18:05,777 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-bad-ring-nondet.wvr.c[4085,4098] [2023-01-27 21:18:05,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:18:05,791 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:18:05,792 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:18:05,796 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:18:05,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05 WrapperNode [2023-01-27 21:18:05,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:18:05,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:18:05,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:18:05,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:18:05,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,850 INFO L138 Inliner]: procedures = 25, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 327 [2023-01-27 21:18:05,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:18:05,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:18:05,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:18:05,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:18:05,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,889 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:18:05,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:18:05,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:18:05,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:18:05,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (1/1) ... [2023-01-27 21:18:05,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:18:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:05,917 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 21:18:05,927 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 21:18:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:18:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:18:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:18:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:18:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:18:05,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:18:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:18:05,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:18:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:18:05,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:18:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:18:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:18:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:18:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:18:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:18:05,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:18:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:18:05,952 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 21:18:06,080 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:18:06,090 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:18:06,389 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:18:06,495 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:18:06,495 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-27 21:18:06,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:18:06 BoogieIcfgContainer [2023-01-27 21:18:06,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:18:06,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:18:06,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:18:06,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:18:06,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:18:05" (1/3) ... [2023-01-27 21:18:06,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da4f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:18:06, skipping insertion in model container [2023-01-27 21:18:06,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:18:05" (2/3) ... [2023-01-27 21:18:06,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da4f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:18:06, skipping insertion in model container [2023-01-27 21:18:06,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:18:06" (3/3) ... [2023-01-27 21:18:06,502 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2023-01-27 21:18:06,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:18:06,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:18:06,524 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:18:06,576 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 21:18:06,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 266 transitions, 556 flow [2023-01-27 21:18:06,660 INFO L130 PetriNetUnfolder]: 25/263 cut-off events. [2023-01-27 21:18:06,661 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:18:06,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 263 events. 25/263 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 225. Up to 4 conditions per place. [2023-01-27 21:18:06,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 266 transitions, 556 flow [2023-01-27 21:18:06,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 253 transitions, 524 flow [2023-01-27 21:18:06,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:18:06,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 253 transitions, 524 flow [2023-01-27 21:18:06,684 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 253 transitions, 524 flow [2023-01-27 21:18:06,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 253 transitions, 524 flow [2023-01-27 21:18:06,715 INFO L130 PetriNetUnfolder]: 25/253 cut-off events. [2023-01-27 21:18:06,715 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:18:06,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 253 events. 25/253 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 225. Up to 4 conditions per place. [2023-01-27 21:18:06,717 INFO L119 LiptonReduction]: Number of co-enabled transitions 2820 [2023-01-27 21:18:13,494 INFO L134 LiptonReduction]: Checked pairs total: 5537 [2023-01-27 21:18:13,494 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-01-27 21:18:13,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:18:13,512 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;@725b4f97, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:18:13,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 21:18:13,516 INFO L130 PetriNetUnfolder]: 10/36 cut-off events. [2023-01-27 21:18:13,516 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 21:18:13,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:13,517 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 21:18:13,517 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 21:18:13,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1470675208, now seen corresponding path program 1 times [2023-01-27 21:18:13,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:13,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408391634] [2023-01-27 21:18:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:13,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:13,721 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 21:18:13,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:13,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408391634] [2023-01-27 21:18:13,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408391634] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:13,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:13,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:18:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457793231] [2023-01-27 21:18:13,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:13,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 21:18:13,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 21:18:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 21:18:13,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 533 [2023-01-27 21:18:13,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 246.0) internal successors, (492), 2 states have internal predecessors, (492), 0 states have call successors, (0), 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 21:18:13,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:13,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 533 [2023-01-27 21:18:13,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:13,872 INFO L130 PetriNetUnfolder]: 748/1046 cut-off events. [2023-01-27 21:18:13,872 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-01-27 21:18:13,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2180 conditions, 1046 events. 748/1046 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3214 event pairs, 493 based on Foata normal form. 0/791 useless extension candidates. Maximal degree in co-relation 1908. Up to 1047 conditions per place. [2023-01-27 21:18:13,880 INFO L137 encePairwiseOnDemand]: 531/533 looper letters, 35 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2023-01-27 21:18:13,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 158 flow [2023-01-27 21:18:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 21:18:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 21:18:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 507 transitions. [2023-01-27 21:18:13,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2023-01-27 21:18:13,895 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 507 transitions. [2023-01-27 21:18:13,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 507 transitions. [2023-01-27 21:18:13,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:13,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 507 transitions. [2023-01-27 21:18:13,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 253.5) internal successors, (507), 2 states have internal predecessors, (507), 0 states have call successors, (0), 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 21:18:13,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 533.0) internal successors, (1599), 3 states have internal predecessors, (1599), 0 states have call successors, (0), 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 21:18:13,908 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 533.0) internal successors, (1599), 3 states have internal predecessors, (1599), 0 states have call successors, (0), 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 21:18:13,909 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 92 flow. Second operand 2 states and 507 transitions. [2023-01-27 21:18:13,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 158 flow [2023-01-27 21:18:13,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 21:18:13,914 INFO L231 Difference]: Finished difference. Result has 32 places, 35 transitions, 76 flow [2023-01-27 21:18:13,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=35} [2023-01-27 21:18:13,918 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-01-27 21:18:13,918 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 35 transitions, 76 flow [2023-01-27 21:18:13,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 246.0) internal successors, (492), 2 states have internal predecessors, (492), 0 states have call successors, (0), 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 21:18:13,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:13,920 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] [2023-01-27 21:18:13,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:18:13,920 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 21:18:13,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash -875827311, now seen corresponding path program 1 times [2023-01-27 21:18:13,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:13,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812978777] [2023-01-27 21:18:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:14,120 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 21:18:14,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:14,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812978777] [2023-01-27 21:18:14,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812978777] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:14,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:14,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:18:14,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111947040] [2023-01-27 21:18:14,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:14,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:18:14,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:14,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:18:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:18:14,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 533 [2023-01-27 21:18:14,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 35 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 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 21:18:14,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:14,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 533 [2023-01-27 21:18:14,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:14,274 INFO L130 PetriNetUnfolder]: 869/1262 cut-off events. [2023-01-27 21:18:14,274 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-27 21:18:14,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 1262 events. 869/1262 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4221 event pairs, 595 based on Foata normal form. 84/1070 useless extension candidates. Maximal degree in co-relation 2569. Up to 1047 conditions per place. [2023-01-27 21:18:14,278 INFO L137 encePairwiseOnDemand]: 524/533 looper letters, 34 selfloop transitions, 2 changer transitions 33/69 dead transitions. [2023-01-27 21:18:14,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 69 transitions, 288 flow [2023-01-27 21:18:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:18:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:18:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2023-01-27 21:18:14,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399624765478424 [2023-01-27 21:18:14,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2023-01-27 21:18:14,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2023-01-27 21:18:14,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:14,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2023-01-27 21:18:14,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 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 21:18:14,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 21:18:14,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 21:18:14,287 INFO L175 Difference]: Start difference. First operand has 32 places, 35 transitions, 76 flow. Second operand 5 states and 1065 transitions. [2023-01-27 21:18:14,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 69 transitions, 288 flow [2023-01-27 21:18:14,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 69 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 21:18:14,288 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 106 flow [2023-01-27 21:18:14,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-01-27 21:18:14,289 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-01-27 21:18:14,289 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 106 flow [2023-01-27 21:18:14,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 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 21:18:14,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:14,290 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 21:18:14,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:18:14,290 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 21:18:14,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1983495064, now seen corresponding path program 1 times [2023-01-27 21:18:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:14,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340483834] [2023-01-27 21:18:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:14,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:18:14,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:14,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340483834] [2023-01-27 21:18:14,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340483834] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:14,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:14,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:18:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362860635] [2023-01-27 21:18:14,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:14,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:18:14,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:18:14,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:18:14,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 533 [2023-01-27 21:18:14,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 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 21:18:14,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:14,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 533 [2023-01-27 21:18:14,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:14,568 INFO L130 PetriNetUnfolder]: 996/1430 cut-off events. [2023-01-27 21:18:14,568 INFO L131 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2023-01-27 21:18:14,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3398 conditions, 1430 events. 996/1430 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4889 event pairs, 680 based on Foata normal form. 82/1199 useless extension candidates. Maximal degree in co-relation 3391. Up to 1048 conditions per place. [2023-01-27 21:18:14,572 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 35 selfloop transitions, 2 changer transitions 22/59 dead transitions. [2023-01-27 21:18:14,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 292 flow [2023-01-27 21:18:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:18:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:18:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2023-01-27 21:18:14,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40196998123827393 [2023-01-27 21:18:14,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2023-01-27 21:18:14,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2023-01-27 21:18:14,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:14,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2023-01-27 21:18:14,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 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 21:18:14,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 21:18:14,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 21:18:14,580 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 106 flow. Second operand 4 states and 857 transitions. [2023-01-27 21:18:14,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 292 flow [2023-01-27 21:18:14,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 276 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:14,582 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 114 flow [2023-01-27 21:18:14,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-01-27 21:18:14,583 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-01-27 21:18:14,585 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 114 flow [2023-01-27 21:18:14,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 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 21:18:14,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:14,586 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 21:18:14,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:18:14,586 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 21:18:14,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:14,586 INFO L85 PathProgramCache]: Analyzing trace with hash -11726098, now seen corresponding path program 1 times [2023-01-27 21:18:14,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:14,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231859127] [2023-01-27 21:18:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:14,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:18:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231859127] [2023-01-27 21:18:14,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231859127] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:14,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:14,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:18:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265376653] [2023-01-27 21:18:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:14,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:18:14,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:14,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:18:14,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:18:14,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 533 [2023-01-27 21:18:14,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 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 21:18:14,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:14,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 533 [2023-01-27 21:18:14,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:14,881 INFO L130 PetriNetUnfolder]: 1247/1783 cut-off events. [2023-01-27 21:18:14,882 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2023-01-27 21:18:14,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4553 conditions, 1783 events. 1247/1783 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6452 event pairs, 870 based on Foata normal form. 92/1464 useless extension candidates. Maximal degree in co-relation 4544. Up to 1049 conditions per place. [2023-01-27 21:18:14,888 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 36 selfloop transitions, 2 changer transitions 24/62 dead transitions. [2023-01-27 21:18:14,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 311 flow [2023-01-27 21:18:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:18:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:18:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 859 transitions. [2023-01-27 21:18:14,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40290806754221387 [2023-01-27 21:18:14,922 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 859 transitions. [2023-01-27 21:18:14,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 859 transitions. [2023-01-27 21:18:14,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:14,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 859 transitions. [2023-01-27 21:18:14,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 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 21:18:14,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 21:18:14,928 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 21:18:14,928 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 114 flow. Second operand 4 states and 859 transitions. [2023-01-27 21:18:14,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 311 flow [2023-01-27 21:18:14,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 295 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-27 21:18:14,936 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 122 flow [2023-01-27 21:18:14,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-01-27 21:18:14,937 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-01-27 21:18:14,938 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 122 flow [2023-01-27 21:18:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 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 21:18:14,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:14,940 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] [2023-01-27 21:18:14,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 21:18:14,940 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 21:18:14,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -451165947, now seen corresponding path program 1 times [2023-01-27 21:18:14,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:14,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401631972] [2023-01-27 21:18:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:14,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:15,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:15,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401631972] [2023-01-27 21:18:15,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401631972] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:15,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:15,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:18:15,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117720654] [2023-01-27 21:18:15,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:15,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:18:15,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 533 [2023-01-27 21:18:15,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 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 21:18:15,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:15,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 533 [2023-01-27 21:18:15,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:15,281 INFO L130 PetriNetUnfolder]: 1394/1946 cut-off events. [2023-01-27 21:18:15,282 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2023-01-27 21:18:15,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 1946 events. 1394/1946 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6914 event pairs, 493 based on Foata normal form. 1/1460 useless extension candidates. Maximal degree in co-relation 4913. Up to 1006 conditions per place. [2023-01-27 21:18:15,289 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 55 selfloop transitions, 2 changer transitions 6/63 dead transitions. [2023-01-27 21:18:15,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 321 flow [2023-01-27 21:18:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2023-01-27 21:18:15,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734208880550344 [2023-01-27 21:18:15,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2023-01-27 21:18:15,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2023-01-27 21:18:15,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:15,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2023-01-27 21:18:15,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 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 21:18:15,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:15,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:15,296 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 122 flow. Second operand 3 states and 757 transitions. [2023-01-27 21:18:15,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 321 flow [2023-01-27 21:18:15,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:15,298 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 132 flow [2023-01-27 21:18:15,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-01-27 21:18:15,300 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-01-27 21:18:15,300 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 132 flow [2023-01-27 21:18:15,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 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 21:18:15,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:15,300 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, 1, 1] [2023-01-27 21:18:15,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 21:18:15,301 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 21:18:15,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -4226639, now seen corresponding path program 1 times [2023-01-27 21:18:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:15,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198801739] [2023-01-27 21:18:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:15,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:15,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:15,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198801739] [2023-01-27 21:18:15,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198801739] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:15,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:15,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:18:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285983906] [2023-01-27 21:18:15,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:15,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:15,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:18:15,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 533 [2023-01-27 21:18:15,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 21:18:15,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:15,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 533 [2023-01-27 21:18:15,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:15,540 INFO L130 PetriNetUnfolder]: 1590/2226 cut-off events. [2023-01-27 21:18:15,540 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2023-01-27 21:18:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2226 events. 1590/2226 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8480 event pairs, 467 based on Foata normal form. 0/1703 useless extension candidates. Maximal degree in co-relation 5801. Up to 1288 conditions per place. [2023-01-27 21:18:15,548 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 51 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-01-27 21:18:15,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 282 flow [2023-01-27 21:18:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 737 transitions. [2023-01-27 21:18:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46091307066916826 [2023-01-27 21:18:15,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 737 transitions. [2023-01-27 21:18:15,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 737 transitions. [2023-01-27 21:18:15,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:15,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 737 transitions. [2023-01-27 21:18:15,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:15,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:15,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:15,553 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 132 flow. Second operand 3 states and 737 transitions. [2023-01-27 21:18:15,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 282 flow [2023-01-27 21:18:15,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:15,555 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 146 flow [2023-01-27 21:18:15,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-01-27 21:18:15,556 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-01-27 21:18:15,556 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 146 flow [2023-01-27 21:18:15,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 21:18:15,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:15,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:15,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 21:18:15,557 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 21:18:15,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash 950240521, now seen corresponding path program 1 times [2023-01-27 21:18:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:15,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782557462] [2023-01-27 21:18:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:15,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:15,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782557462] [2023-01-27 21:18:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782557462] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:15,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:18:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148604402] [2023-01-27 21:18:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:15,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:15,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:18:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 533 [2023-01-27 21:18:15,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 21:18:15,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:15,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 533 [2023-01-27 21:18:15,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:15,846 INFO L130 PetriNetUnfolder]: 2252/3132 cut-off events. [2023-01-27 21:18:15,846 INFO L131 PetriNetUnfolder]: For 1970/1970 co-relation queries the response was YES. [2023-01-27 21:18:15,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8762 conditions, 3132 events. 2252/3132 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12337 event pairs, 887 based on Foata normal form. 0/2503 useless extension candidates. Maximal degree in co-relation 8750. Up to 2073 conditions per place. [2023-01-27 21:18:15,856 INFO L137 encePairwiseOnDemand]: 528/533 looper letters, 48 selfloop transitions, 4 changer transitions 6/58 dead transitions. [2023-01-27 21:18:15,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 324 flow [2023-01-27 21:18:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-01-27 21:18:15,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442151344590369 [2023-01-27 21:18:15,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-01-27 21:18:15,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-01-27 21:18:15,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:15,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-01-27 21:18:15,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 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 21:18:15,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:15,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:15,862 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 146 flow. Second operand 3 states and 707 transitions. [2023-01-27 21:18:15,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 324 flow [2023-01-27 21:18:15,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 21:18:15,867 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 176 flow [2023-01-27 21:18:15,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-01-27 21:18:15,868 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2023-01-27 21:18:15,868 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 176 flow [2023-01-27 21:18:15,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 21:18:15,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:15,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:15,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 21:18:15,871 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 21:18:15,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash 898013115, now seen corresponding path program 2 times [2023-01-27 21:18:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:15,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950783996] [2023-01-27 21:18:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:15,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:16,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:16,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950783996] [2023-01-27 21:18:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950783996] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:16,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:18:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969491675] [2023-01-27 21:18:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:18:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:18:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:18:16,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 533 [2023-01-27 21:18:16,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 21:18:16,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:16,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 533 [2023-01-27 21:18:16,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:16,365 INFO L130 PetriNetUnfolder]: 2852/3948 cut-off events. [2023-01-27 21:18:16,365 INFO L131 PetriNetUnfolder]: For 2542/2542 co-relation queries the response was YES. [2023-01-27 21:18:16,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 3948 events. 2852/3948 cut-off events. For 2542/2542 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16060 event pairs, 1079 based on Foata normal form. 72/3217 useless extension candidates. Maximal degree in co-relation 11822. Up to 2045 conditions per place. [2023-01-27 21:18:16,381 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 40 selfloop transitions, 5 changer transitions 15/60 dead transitions. [2023-01-27 21:18:16,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 362 flow [2023-01-27 21:18:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:18:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:18:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2023-01-27 21:18:16,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045028142589118 [2023-01-27 21:18:16,383 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2023-01-27 21:18:16,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2023-01-27 21:18:16,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:16,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2023-01-27 21:18:16,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 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 21:18:16,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 21:18:16,388 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 21:18:16,388 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 176 flow. Second operand 5 states and 1078 transitions. [2023-01-27 21:18:16,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 362 flow [2023-01-27 21:18:16,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 21:18:16,393 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 175 flow [2023-01-27 21:18:16,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-01-27 21:18:16,395 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2023-01-27 21:18:16,395 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 175 flow [2023-01-27 21:18:16,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 21:18:16,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:16,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:16,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 21:18:16,396 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 21:18:16,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1169813069, now seen corresponding path program 3 times [2023-01-27 21:18:16,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:16,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175924649] [2023-01-27 21:18:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:16,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:16,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:16,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175924649] [2023-01-27 21:18:16,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175924649] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:16,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162840026] [2023-01-27 21:18:16,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:18:16,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:16,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:16,647 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 21:18:16,672 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 21:18:16,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:18:16,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:18:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:18:16,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 21:18:16,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162840026] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:16,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 21:18:16,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-01-27 21:18:16,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608323402] [2023-01-27 21:18:16,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:18:16,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 533 [2023-01-27 21:18:16,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 21:18:16,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:16,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 533 [2023-01-27 21:18:16,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:17,191 INFO L130 PetriNetUnfolder]: 2797/3939 cut-off events. [2023-01-27 21:18:17,191 INFO L131 PetriNetUnfolder]: For 2929/2929 co-relation queries the response was YES. [2023-01-27 21:18:17,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11868 conditions, 3939 events. 2797/3939 cut-off events. For 2929/2929 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16608 event pairs, 911 based on Foata normal form. 140/3324 useless extension candidates. Maximal degree in co-relation 11854. Up to 2998 conditions per place. [2023-01-27 21:18:17,202 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 60 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-01-27 21:18:17,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 398 flow [2023-01-27 21:18:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2023-01-27 21:18:17,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627892432770482 [2023-01-27 21:18:17,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2023-01-27 21:18:17,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2023-01-27 21:18:17,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:17,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2023-01-27 21:18:17,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 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 21:18:17,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:17,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:17,209 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 175 flow. Second operand 3 states and 740 transitions. [2023-01-27 21:18:17,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 398 flow [2023-01-27 21:18:17,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 379 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-01-27 21:18:17,213 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 180 flow [2023-01-27 21:18:17,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-01-27 21:18:17,214 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2023-01-27 21:18:17,214 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 180 flow [2023-01-27 21:18:17,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 21:18:17,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:17,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:17,223 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 21:18:17,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:17,421 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 21:18:17,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash 279207723, now seen corresponding path program 4 times [2023-01-27 21:18:17,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:17,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525458187] [2023-01-27 21:18:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525458187] [2023-01-27 21:18:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525458187] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807980448] [2023-01-27 21:18:17,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:18:17,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:17,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:17,610 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 21:18:17,625 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 21:18:17,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:18:17,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:18:17,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:18:17,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 21:18:17,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807980448] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:17,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 21:18:17,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-01-27 21:18:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745622377] [2023-01-27 21:18:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:18:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:18:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:18:17,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 533 [2023-01-27 21:18:17,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 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 21:18:17,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:17,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 533 [2023-01-27 21:18:17,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:18,134 INFO L130 PetriNetUnfolder]: 2840/4022 cut-off events. [2023-01-27 21:18:18,135 INFO L131 PetriNetUnfolder]: For 3815/3815 co-relation queries the response was YES. [2023-01-27 21:18:18,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12390 conditions, 4022 events. 2840/4022 cut-off events. For 3815/3815 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16641 event pairs, 884 based on Foata normal form. 176/3507 useless extension candidates. Maximal degree in co-relation 12376. Up to 2410 conditions per place. [2023-01-27 21:18:18,144 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 56 selfloop transitions, 3 changer transitions 4/63 dead transitions. [2023-01-27 21:18:18,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 396 flow [2023-01-27 21:18:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:18:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:18:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-01-27 21:18:18,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659161976235147 [2023-01-27 21:18:18,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-01-27 21:18:18,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-01-27 21:18:18,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:18,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-01-27 21:18:18,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 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 21:18:18,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:18,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 21:18:18,150 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 180 flow. Second operand 3 states and 745 transitions. [2023-01-27 21:18:18,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 396 flow [2023-01-27 21:18:18,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:18:18,152 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 201 flow [2023-01-27 21:18:18,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-01-27 21:18:18,153 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2023-01-27 21:18:18,153 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 201 flow [2023-01-27 21:18:18,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 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 21:18:18,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:18,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:18,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:18,359 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,SelfDestructingSolverStorable9 [2023-01-27 21:18:18,359 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 21:18:18,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1250184703, now seen corresponding path program 5 times [2023-01-27 21:18:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:18,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561379787] [2023-01-27 21:18:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:18,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:18,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:18,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561379787] [2023-01-27 21:18:18,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561379787] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:18:18,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:18:18,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:18:18,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467427513] [2023-01-27 21:18:18,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:18:18,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:18:18,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:18,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:18:18,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:18:18,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 533 [2023-01-27 21:18:18,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 201 flow. Second operand has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 21:18:18,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:18,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 533 [2023-01-27 21:18:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:18,788 INFO L130 PetriNetUnfolder]: 2728/3862 cut-off events. [2023-01-27 21:18:18,788 INFO L131 PetriNetUnfolder]: For 3991/3991 co-relation queries the response was YES. [2023-01-27 21:18:18,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12763 conditions, 3862 events. 2728/3862 cut-off events. For 3991/3991 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16677 event pairs, 878 based on Foata normal form. 20/3203 useless extension candidates. Maximal degree in co-relation 12748. Up to 2227 conditions per place. [2023-01-27 21:18:18,801 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 49 selfloop transitions, 5 changer transitions 8/62 dead transitions. [2023-01-27 21:18:18,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 408 flow [2023-01-27 21:18:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:18:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:18:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1075 transitions. [2023-01-27 21:18:18,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337711069418386 [2023-01-27 21:18:18,804 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1075 transitions. [2023-01-27 21:18:18,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1075 transitions. [2023-01-27 21:18:18,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:18,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1075 transitions. [2023-01-27 21:18:18,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 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 21:18:18,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 21:18:18,808 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 21:18:18,809 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 201 flow. Second operand 5 states and 1075 transitions. [2023-01-27 21:18:18,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 408 flow [2023-01-27 21:18:18,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 383 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-27 21:18:18,813 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 203 flow [2023-01-27 21:18:18,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-01-27 21:18:18,813 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2023-01-27 21:18:18,814 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 203 flow [2023-01-27 21:18:18,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 21:18:18,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:18,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:18,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 21:18:18,814 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 21:18:18,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash 928404999, now seen corresponding path program 6 times [2023-01-27 21:18:18,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:18,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150013809] [2023-01-27 21:18:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:18,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:19,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:19,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150013809] [2023-01-27 21:18:19,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150013809] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:19,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176941472] [2023-01-27 21:18:19,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:18:19,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:19,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:19,026 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 21:18:19,028 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 21:18:19,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:18:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:18:19,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:19,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-01-27 21:18:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:18:19,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:19,386 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 21:18:19,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-27 21:18:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 21:18:19,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176941472] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:19,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:19,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-27 21:18:19,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703769042] [2023-01-27 21:18:19,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:19,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:18:19,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:18:19,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:18:19,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 533 [2023-01-27 21:18:19,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 203 flow. Second operand has 11 states, 11 states have (on average 201.9090909090909) internal successors, (2221), 11 states have internal predecessors, (2221), 0 states have call successors, (0), 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 21:18:19,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:19,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 533 [2023-01-27 21:18:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:19,787 INFO L130 PetriNetUnfolder]: 1956/2781 cut-off events. [2023-01-27 21:18:19,788 INFO L131 PetriNetUnfolder]: For 3631/3631 co-relation queries the response was YES. [2023-01-27 21:18:19,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8912 conditions, 2781 events. 1956/2781 cut-off events. For 3631/3631 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11034 event pairs, 342 based on Foata normal form. 122/2442 useless extension candidates. Maximal degree in co-relation 8897. Up to 962 conditions per place. [2023-01-27 21:18:19,795 INFO L137 encePairwiseOnDemand]: 524/533 looper letters, 0 selfloop transitions, 0 changer transitions 99/99 dead transitions. [2023-01-27 21:18:19,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 694 flow [2023-01-27 21:18:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:18:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:18:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2243 transitions. [2023-01-27 21:18:19,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825686508613338 [2023-01-27 21:18:19,800 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2243 transitions. [2023-01-27 21:18:19,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2243 transitions. [2023-01-27 21:18:19,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:19,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2243 transitions. [2023-01-27 21:18:19,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 203.9090909090909) internal successors, (2243), 11 states have internal predecessors, (2243), 0 states have call successors, (0), 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 21:18:19,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 533.0) internal successors, (6396), 12 states have internal predecessors, (6396), 0 states have call successors, (0), 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 21:18:19,820 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 533.0) internal successors, (6396), 12 states have internal predecessors, (6396), 0 states have call successors, (0), 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 21:18:19,820 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 203 flow. Second operand 11 states and 2243 transitions. [2023-01-27 21:18:19,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 694 flow [2023-01-27 21:18:19,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 619 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-01-27 21:18:19,824 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2023-01-27 21:18:19,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2023-01-27 21:18:19,825 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-01-27 21:18:19,825 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2023-01-27 21:18:19,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 201.9090909090909) internal successors, (2221), 11 states have internal predecessors, (2221), 0 states have call successors, (0), 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 21:18:19,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-27 21:18:19,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-27 21:18:19,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-27 21:18:19,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-27 21:18:19,834 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 21:18:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:20,034 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:20,036 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 21:18:20,036 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 21:18:20,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 09:18:20 BasicIcfg [2023-01-27 21:18:20,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 21:18:20,039 INFO L158 Benchmark]: Toolchain (without parser) took 14421.82ms. Allocated memory was 379.6MB in the beginning and 660.6MB in the end (delta: 281.0MB). Free memory was 348.2MB in the beginning and 303.8MB in the end (delta: 44.5MB). Peak memory consumption was 325.9MB. Max. memory is 16.0GB. [2023-01-27 21:18:20,039 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:18:20,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.54ms. Allocated memory is still 379.6MB. Free memory was 347.9MB in the beginning and 335.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 21:18:20,039 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.99ms. Allocated memory is still 379.6MB. Free memory was 335.3MB in the beginning and 332.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:18:20,040 INFO L158 Benchmark]: Boogie Preprocessor took 40.84ms. Allocated memory is still 379.6MB. Free memory was 332.9MB in the beginning and 330.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:18:20,040 INFO L158 Benchmark]: RCFGBuilder took 604.21ms. Allocated memory is still 379.6MB. Free memory was 330.8MB in the beginning and 288.8MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.0GB. [2023-01-27 21:18:20,040 INFO L158 Benchmark]: TraceAbstraction took 13540.49ms. Allocated memory was 379.6MB in the beginning and 660.6MB in the end (delta: 281.0MB). Free memory was 288.5MB in the beginning and 303.8MB in the end (delta: -15.3MB). Peak memory consumption was 267.2MB. Max. memory is 16.0GB. [2023-01-27 21:18:20,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 179.54ms. Allocated memory is still 379.6MB. Free memory was 347.9MB in the beginning and 335.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.99ms. Allocated memory is still 379.6MB. Free memory was 335.3MB in the beginning and 332.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.84ms. Allocated memory is still 379.6MB. Free memory was 332.9MB in the beginning and 330.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 604.21ms. Allocated memory is still 379.6MB. Free memory was 330.8MB in the beginning and 288.8MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.0GB. * TraceAbstraction took 13540.49ms. Allocated memory was 379.6MB in the beginning and 660.6MB in the end (delta: 281.0MB). Free memory was 288.5MB in the beginning and 303.8MB in the end (delta: -15.3MB). Peak memory consumption was 267.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.8s, 238 PlacesBefore, 37 PlacesAfterwards, 253 TransitionsBefore, 37 TransitionsAfterwards, 2820 CoEnabledTransitionPairs, 8 FixpointIterations, 159 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 35 TrivialYvCompositions, 14 ConcurrentYvCompositions, 15 ChoiceCompositions, 267 TotalNumberOfCompositions, 5537 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4134, independent: 3984, independent conditional: 0, independent unconditional: 3984, dependent: 150, dependent conditional: 0, dependent unconditional: 150, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1717, independent: 1685, independent conditional: 0, independent unconditional: 1685, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4134, independent: 2299, independent conditional: 0, independent unconditional: 2299, dependent: 118, dependent conditional: 0, dependent unconditional: 118, unknown: 1717, unknown conditional: 0, unknown unconditional: 1717] , Statistics on independence cache: Total cache size (in pairs): 157, Positive cache size: 146, Positive conditional cache size: 0, Positive unconditional cache size: 146, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 156]: 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, 287 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: 13.4s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 304 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 304 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1242 IncrementalHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 0 mSDtfsCounter, 1242 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=11, InterpolantAutomatonStates: 51, 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 451 NumberOfCodeBlocks, 444 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 468 ConstructedInterpolants, 0 QuantifiedInterpolants, 1566 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1210 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 16 InterpolantComputations, 11 PerfectInterpolantSequences, 72/80 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 21:18:20,060 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...