./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:02:52,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:02:52,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:02:52,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:02:52,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:02:52,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:02:52,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:02:52,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:02:52,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:02:52,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:02:52,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:02:52,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:02:52,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:02:52,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:02:52,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:02:52,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:02:52,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:02:52,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:02:52,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:02:52,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:02:52,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:02:52,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:02:52,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:02:52,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:02:52,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:02:52,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:02:52,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:02:52,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:02:52,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:02:52,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:02:52,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:02:52,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:02:52,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:02:52,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:02:52,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:02:52,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:02:52,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:02:52,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:02:52,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:02:52,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:02:52,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:02:52,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:02:53,021 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:02:53,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:02:53,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:02:53,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:02:53,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:02:53,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:02:53,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:02:53,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:02:53,023 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:02:53,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:02:53,024 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:02:53,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:02:53,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:02:53,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:02:53,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:02:53,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:02:53,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:02:53,025 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:02:53,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:02:53,025 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:02:53,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:02:53,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:02:53,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:02:53,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:02:53,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:02:53,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:02:53,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:02:53,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:02:53,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:02:53,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:02:53,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:02:53,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:02:53,027 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:02:53,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:02:53,028 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:02:53,028 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:02:53,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:02:53,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:02:53,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:02:53,293 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:02:53,294 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:02:53,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-08-30 23:02:54,384 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:02:54,573 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:02:54,574 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-08-30 23:02:54,582 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65568060e/35d1e9e4c898479ca9d24e8629597264/FLAGc07196986 [2023-08-30 23:02:54,593 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65568060e/35d1e9e4c898479ca9d24e8629597264 [2023-08-30 23:02:54,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:02:54,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:02:54,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:02:54,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:02:54,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:02:54,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:54,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2900bbb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54, skipping insertion in model container [2023-08-30 23:02:54,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:54,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:02:54,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:02:54,728 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:02:54,834 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2023-08-30 23:02:54,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:02:54,852 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:02:54,871 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:02:54,885 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2023-08-30 23:02:54,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:02:54,926 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:02:54,927 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:02:54,927 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:02:54,932 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:02:54,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54 WrapperNode [2023-08-30 23:02:54,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:02:54,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:02:54,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:02:54,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:02:54,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:54,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:54,983 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 76 [2023-08-30 23:02:54,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:02:54,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:02:54,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:02:54,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:02:54,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:54,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:54,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:54,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:55,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:55,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:55,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:55,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:55,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:02:55,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:02:55,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:02:55,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:02:55,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (1/1) ... [2023-08-30 23:02:55,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:02:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:02:55,061 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) [2023-08-30 23:02:55,077 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 [2023-08-30 23:02:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 23:02:55,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 23:02:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:02:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:02:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:02:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:02:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:02:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:02:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:02:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:02:55,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:02:55,088 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 23:02:55,206 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:02:55,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:02:55,312 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:02:55,338 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:02:55,338 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 23:02:55,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:02:55 BoogieIcfgContainer [2023-08-30 23:02:55,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:02:55,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:02:55,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:02:55,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:02:55,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:02:54" (1/3) ... [2023-08-30 23:02:55,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52188ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:02:55, skipping insertion in model container [2023-08-30 23:02:55,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:02:54" (2/3) ... [2023-08-30 23:02:55,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52188ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:02:55, skipping insertion in model container [2023-08-30 23:02:55,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:02:55" (3/3) ... [2023-08-30 23:02:55,345 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-08-30 23:02:55,350 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:02:55,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:02:55,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:02:55,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:02:55,410 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:02:55,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 129 flow [2023-08-30 23:02:55,474 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2023-08-30 23:02:55,474 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:02:55,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 4/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-08-30 23:02:55,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 62 transitions, 129 flow [2023-08-30 23:02:55,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 62 transitions, 129 flow [2023-08-30 23:02:55,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:02:55,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 62 transitions, 129 flow [2023-08-30 23:02:55,491 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 62 transitions, 129 flow [2023-08-30 23:02:55,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 129 flow [2023-08-30 23:02:55,503 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2023-08-30 23:02:55,503 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:02:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 4/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-08-30 23:02:55,504 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-30 23:02:56,864 INFO L134 LiptonReduction]: Checked pairs total: 751 [2023-08-30 23:02:56,864 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-30 23:02:56,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:02:56,884 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3251bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:02:56,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 23:02:56,887 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 23:02:56,887 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:02:56,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:56,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:02:56,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:02:56,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 9800033, now seen corresponding path program 1 times [2023-08-30 23:02:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:56,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397087369] [2023-08-30 23:02:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:56,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:57,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:57,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397087369] [2023-08-30 23:02:57,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397087369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:02:57,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:02:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:02:57,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552969067] [2023-08-30 23:02:57,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:02:57,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:02:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:02:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:02:57,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 123 [2023-08-30 23:02:57,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:57,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:57,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 123 [2023-08-30 23:02:57,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:57,156 INFO L130 PetriNetUnfolder]: 7/20 cut-off events. [2023-08-30 23:02:57,156 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:02:57,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 2 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 13 conditions per place. [2023-08-30 23:02:57,157 INFO L137 encePairwiseOnDemand]: 119/123 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2023-08-30 23:02:57,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 43 flow [2023-08-30 23:02:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:02:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:02:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-08-30 23:02:57,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2023-08-30 23:02:57,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-08-30 23:02:57,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-08-30 23:02:57,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:57,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-08-30 23:02:57,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:57,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 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) [2023-08-30 23:02:57,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 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) [2023-08-30 23:02:57,184 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 3 states and 168 transitions. [2023-08-30 23:02:57,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 43 flow [2023-08-30 23:02:57,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:02:57,187 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 25 flow [2023-08-30 23:02:57,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=25, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-08-30 23:02:57,192 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 0 predicate places. [2023-08-30 23:02:57,192 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 25 flow [2023-08-30 23:02:57,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:57,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:57,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 23:02:57,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:02:57,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:02:57,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash 827866320, now seen corresponding path program 1 times [2023-08-30 23:02:57,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:57,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380741096] [2023-08-30 23:02:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:57,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:02:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:57,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:02:57,273 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:02:57,274 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 23:02:57,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 23:02:57,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 23:02:57,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:02:57,278 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:02:57,281 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:02:57,281 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:02:57,303 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:02:57,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 210 flow [2023-08-30 23:02:57,344 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-08-30 23:02:57,344 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:02:57,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 7/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-08-30 23:02:57,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 210 flow [2023-08-30 23:02:57,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 210 flow [2023-08-30 23:02:57,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:02:57,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 210 flow [2023-08-30 23:02:57,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 210 flow [2023-08-30 23:02:57,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 210 flow [2023-08-30 23:02:57,358 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-08-30 23:02:57,358 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:02:57,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 7/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-08-30 23:02:57,361 INFO L119 LiptonReduction]: Number of co-enabled transitions 4536 [2023-08-30 23:02:58,725 INFO L134 LiptonReduction]: Checked pairs total: 5748 [2023-08-30 23:02:58,725 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-30 23:02:58,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:02:58,728 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3251bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:02:58,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:02:58,729 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:02:58,729 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:02:58,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:58,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:02:58,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:02:58,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:58,730 INFO L85 PathProgramCache]: Analyzing trace with hash 16692852, now seen corresponding path program 1 times [2023-08-30 23:02:58,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:58,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879326076] [2023-08-30 23:02:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:58,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:58,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879326076] [2023-08-30 23:02:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879326076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:02:58,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:02:58,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:02:58,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992285708] [2023-08-30 23:02:58,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:02:58,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:02:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:02:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:02:58,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 191 [2023-08-30 23:02:58,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:58,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:58,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 191 [2023-08-30 23:02:58,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:58,815 INFO L130 PetriNetUnfolder]: 129/237 cut-off events. [2023-08-30 23:02:58,815 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 23:02:58,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 237 events. 129/237 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 931 event pairs, 47 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 198. Up to 125 conditions per place. [2023-08-30 23:02:58,817 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 27 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-08-30 23:02:58,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 33 transitions, 143 flow [2023-08-30 23:02:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:02:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:02:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-30 23:02:58,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886561954624782 [2023-08-30 23:02:58,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-30 23:02:58,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-30 23:02:58,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:58,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-30 23:02:58,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:58,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:58,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:58,821 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 56 flow. Second operand 3 states and 280 transitions. [2023-08-30 23:02:58,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 33 transitions, 143 flow [2023-08-30 23:02:58,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 141 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 23:02:58,822 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 73 flow [2023-08-30 23:02:58,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-30 23:02:58,823 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-30 23:02:58,823 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 73 flow [2023-08-30 23:02:58,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:58,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:58,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 23:02:58,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:02:58,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:02:58,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1500600905, now seen corresponding path program 1 times [2023-08-30 23:02:58,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:58,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545259285] [2023-08-30 23:02:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:58,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:58,848 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:02:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:58,873 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:02:58,873 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:02:58,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 23:02:58,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 23:02:58,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 23:02:58,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 23:02:58,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:02:58,874 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:02:58,875 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:02:58,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 23:02:58,889 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:02:58,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 293 flow [2023-08-30 23:02:58,903 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2023-08-30 23:02:58,903 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:02:58,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 170 events. 10/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-30 23:02:58,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 136 transitions, 293 flow [2023-08-30 23:02:58,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 136 transitions, 293 flow [2023-08-30 23:02:58,905 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:02:58,905 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 136 transitions, 293 flow [2023-08-30 23:02:58,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 136 transitions, 293 flow [2023-08-30 23:02:58,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 293 flow [2023-08-30 23:02:58,916 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2023-08-30 23:02:58,916 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:02:58,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 170 events. 10/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-30 23:02:58,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 10800 [2023-08-30 23:03:00,565 INFO L134 LiptonReduction]: Checked pairs total: 13800 [2023-08-30 23:03:00,565 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-30 23:03:00,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:00,567 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3251bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:00,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 23:03:00,568 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:00,568 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:00,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:00,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:00,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:00,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:00,569 INFO L85 PathProgramCache]: Analyzing trace with hash 25815472, now seen corresponding path program 1 times [2023-08-30 23:03:00,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:00,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975882349] [2023-08-30 23:03:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:00,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:00,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:00,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975882349] [2023-08-30 23:03:00,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975882349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:00,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:00,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:00,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81488238] [2023-08-30 23:03:00,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:00,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:00,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:00,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 262 [2023-08-30 23:03:00,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:00,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 262 [2023-08-30 23:03:00,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:00,759 INFO L130 PetriNetUnfolder]: 1525/2241 cut-off events. [2023-08-30 23:03:00,760 INFO L131 PetriNetUnfolder]: For 292/292 co-relation queries the response was YES. [2023-08-30 23:03:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 2241 events. 1525/2241 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10963 event pairs, 461 based on Foata normal form. 0/1800 useless extension candidates. Maximal degree in co-relation 862. Up to 1621 conditions per place. [2023-08-30 23:03:00,770 INFO L137 encePairwiseOnDemand]: 254/262 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-08-30 23:03:00,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 215 flow [2023-08-30 23:03:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-30 23:03:00,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48982188295165396 [2023-08-30 23:03:00,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-30 23:03:00,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-30 23:03:00,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:00,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-30 23:03:00,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,776 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 81 flow. Second operand 3 states and 385 transitions. [2023-08-30 23:03:00,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 215 flow [2023-08-30 23:03:00,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 207 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:00,778 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 103 flow [2023-08-30 23:03:00,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-08-30 23:03:00,779 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-30 23:03:00,779 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 103 flow [2023-08-30 23:03:00,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:00,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:00,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:03:00,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:00,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1592627597, now seen corresponding path program 1 times [2023-08-30 23:03:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:00,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129517495] [2023-08-30 23:03:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:00,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:03:00,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:00,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129517495] [2023-08-30 23:03:00,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129517495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:00,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:00,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:00,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225155312] [2023-08-30 23:03:00,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:00,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:00,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:00,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:00,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:00,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 262 [2023-08-30 23:03:00,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:00,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 262 [2023-08-30 23:03:00,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:00,961 INFO L130 PetriNetUnfolder]: 1237/1837 cut-off events. [2023-08-30 23:03:00,961 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-08-30 23:03:00,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4108 conditions, 1837 events. 1237/1837 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8346 event pairs, 935 based on Foata normal form. 128/1928 useless extension candidates. Maximal degree in co-relation 2052. Up to 1755 conditions per place. [2023-08-30 23:03:00,968 INFO L137 encePairwiseOnDemand]: 258/262 looper letters, 25 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 23:03:00,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 143 flow [2023-08-30 23:03:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-30 23:03:00,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46055979643765904 [2023-08-30 23:03:00,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-30 23:03:00,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-30 23:03:00,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:00,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-30 23:03:00,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,973 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 103 flow. Second operand 3 states and 362 transitions. [2023-08-30 23:03:00,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 143 flow [2023-08-30 23:03:00,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:00,974 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 89 flow [2023-08-30 23:03:00,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-30 23:03:00,975 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-30 23:03:00,975 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 89 flow [2023-08-30 23:03:00,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:00,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:00,976 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 23:03:00,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:03:00,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:00,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash -795684680, now seen corresponding path program 1 times [2023-08-30 23:03:00,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:00,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77520357] [2023-08-30 23:03:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:00,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:00,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:00,992 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:00,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 23:03:00,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 23:03:00,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 23:03:00,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 23:03:00,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 23:03:00,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:03:00,993 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:03:00,993 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:00,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 23:03:01,013 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:01,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 378 flow [2023-08-30 23:03:01,030 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2023-08-30 23:03:01,030 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:03:01,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 219 events. 13/219 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 600 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 178. Up to 10 conditions per place. [2023-08-30 23:03:01,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 173 transitions, 378 flow [2023-08-30 23:03:01,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 173 transitions, 378 flow [2023-08-30 23:03:01,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:01,032 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 173 transitions, 378 flow [2023-08-30 23:03:01,032 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 173 transitions, 378 flow [2023-08-30 23:03:01,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 378 flow [2023-08-30 23:03:01,046 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2023-08-30 23:03:01,046 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:03:01,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 219 events. 13/219 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 600 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 178. Up to 10 conditions per place. [2023-08-30 23:03:01,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 19728 [2023-08-30 23:03:03,302 INFO L134 LiptonReduction]: Checked pairs total: 24108 [2023-08-30 23:03:03,303 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 23:03:03,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:03,304 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3251bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:03,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:03:03,310 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:03:03,312 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:03,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:03,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:03,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:03,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash 37347658, now seen corresponding path program 1 times [2023-08-30 23:03:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963433084] [2023-08-30 23:03:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963433084] [2023-08-30 23:03:03,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963433084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:03,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:03,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865099366] [2023-08-30 23:03:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:03,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 340 [2023-08-30 23:03:03,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:03,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:03,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 340 [2023-08-30 23:03:03,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:04,731 INFO L130 PetriNetUnfolder]: 15543/20499 cut-off events. [2023-08-30 23:03:04,731 INFO L131 PetriNetUnfolder]: For 3384/3384 co-relation queries the response was YES. [2023-08-30 23:03:04,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42616 conditions, 20499 events. 15543/20499 cut-off events. For 3384/3384 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 110519 event pairs, 4221 based on Foata normal form. 0/15984 useless extension candidates. Maximal degree in co-relation 4715. Up to 17335 conditions per place. [2023-08-30 23:03:04,834 INFO L137 encePairwiseOnDemand]: 330/340 looper letters, 53 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-08-30 23:03:04,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 291 flow [2023-08-30 23:03:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-30 23:03:04,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2023-08-30 23:03:04,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-30 23:03:04,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-30 23:03:04,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:04,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-30 23:03:04,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:04,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:04,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:04,840 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 108 flow. Second operand 3 states and 490 transitions. [2023-08-30 23:03:04,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 291 flow [2023-08-30 23:03:04,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 273 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:04,845 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 133 flow [2023-08-30 23:03:04,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=340, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 23:03:04,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-30 23:03:04,846 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 133 flow [2023-08-30 23:03:04,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:04,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:04,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:04,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:03:04,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:04,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1990224832, now seen corresponding path program 1 times [2023-08-30 23:03:04,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:04,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161723368] [2023-08-30 23:03:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:04,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:03:04,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:04,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161723368] [2023-08-30 23:03:04,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161723368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:04,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:04,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679201824] [2023-08-30 23:03:04,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:04,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:04,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 340 [2023-08-30 23:03:04,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:04,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:04,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 340 [2023-08-30 23:03:04,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:05,811 INFO L130 PetriNetUnfolder]: 10525/14077 cut-off events. [2023-08-30 23:03:05,811 INFO L131 PetriNetUnfolder]: For 2790/2790 co-relation queries the response was YES. [2023-08-30 23:03:05,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31221 conditions, 14077 events. 10525/14077 cut-off events. For 2790/2790 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 70158 event pairs, 7967 based on Foata normal form. 1344/15217 useless extension candidates. Maximal degree in co-relation 15760. Up to 13635 conditions per place. [2023-08-30 23:03:05,873 INFO L137 encePairwiseOnDemand]: 335/340 looper letters, 33 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 23:03:05,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 185 flow [2023-08-30 23:03:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-30 23:03:05,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2023-08-30 23:03:05,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-30 23:03:05,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-30 23:03:05,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:05,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-30 23:03:05,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:05,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:05,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:05,879 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 133 flow. Second operand 3 states and 460 transitions. [2023-08-30 23:03:05,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 185 flow [2023-08-30 23:03:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:05,883 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 114 flow [2023-08-30 23:03:05,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=340, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-30 23:03:05,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-30 23:03:05,884 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 114 flow [2023-08-30 23:03:05,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:05,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:05,885 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:05,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:03:05,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:05,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1805955286, now seen corresponding path program 1 times [2023-08-30 23:03:05,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:05,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412273077] [2023-08-30 23:03:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:05,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:05,901 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:05,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:05,919 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:05,919 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 23:03:05,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 23:03:05,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 23:03:05,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 23:03:05,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 23:03:05,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 23:03:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:03:05,920 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:03:05,921 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:05,921 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 23:03:05,949 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:05,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 210 transitions, 465 flow [2023-08-30 23:03:05,975 INFO L130 PetriNetUnfolder]: 16/268 cut-off events. [2023-08-30 23:03:05,976 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:03:05,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 268 events. 16/268 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 232. Up to 12 conditions per place. [2023-08-30 23:03:05,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 210 transitions, 465 flow [2023-08-30 23:03:05,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 210 transitions, 465 flow [2023-08-30 23:03:05,979 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:05,979 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 210 transitions, 465 flow [2023-08-30 23:03:05,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 210 transitions, 465 flow [2023-08-30 23:03:05,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 210 transitions, 465 flow [2023-08-30 23:03:06,005 INFO L130 PetriNetUnfolder]: 16/268 cut-off events. [2023-08-30 23:03:06,005 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:03:06,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 268 events. 16/268 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 232. Up to 12 conditions per place. [2023-08-30 23:03:06,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 31320 [2023-08-30 23:03:08,356 INFO L134 LiptonReduction]: Checked pairs total: 37498 [2023-08-30 23:03:08,356 INFO L136 LiptonReduction]: Total number of compositions: 201 [2023-08-30 23:03:08,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:08,357 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3251bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:08,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 23:03:08,358 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 23:03:08,358 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:08,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:08,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:08,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:08,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 51466468, now seen corresponding path program 1 times [2023-08-30 23:03:08,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:08,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538906225] [2023-08-30 23:03:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:08,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538906225] [2023-08-30 23:03:08,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538906225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:08,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:08,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844991074] [2023-08-30 23:03:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:08,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:08,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:08,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 411 [2023-08-30 23:03:08,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:08,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:08,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 411 [2023-08-30 23:03:08,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:18,449 INFO L130 PetriNetUnfolder]: 146239/181311 cut-off events. [2023-08-30 23:03:18,450 INFO L131 PetriNetUnfolder]: For 35720/35720 co-relation queries the response was YES. [2023-08-30 23:03:18,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376753 conditions, 181311 events. 146239/181311 cut-off events. For 35720/35720 co-relation queries the response was YES. Maximal size of possible extension queue 6701. Compared 1019999 event pairs, 38427 based on Foata normal form. 0/138378 useless extension candidates. Maximal degree in co-relation 43003. Up to 165923 conditions per place. [2023-08-30 23:03:19,393 INFO L137 encePairwiseOnDemand]: 399/411 looper letters, 66 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-08-30 23:03:19,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 371 flow [2023-08-30 23:03:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-30 23:03:19,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48256285482562855 [2023-08-30 23:03:19,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-30 23:03:19,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-30 23:03:19,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:19,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-30 23:03:19,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:19,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:19,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:19,400 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 137 flow. Second operand 3 states and 595 transitions. [2023-08-30 23:03:19,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 371 flow [2023-08-30 23:03:19,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 339 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:19,423 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 163 flow [2023-08-30 23:03:19,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-30 23:03:19,424 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-30 23:03:19,424 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 163 flow [2023-08-30 23:03:19,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:19,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:19,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 23:03:19,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:19,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash -992478722, now seen corresponding path program 1 times [2023-08-30 23:03:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:19,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500240962] [2023-08-30 23:03:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:03:19,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:19,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500240962] [2023-08-30 23:03:19,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500240962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:19,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:19,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742298376] [2023-08-30 23:03:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:19,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:19,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 411 [2023-08-30 23:03:19,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:19,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:19,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 411 [2023-08-30 23:03:19,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:25,694 INFO L130 PetriNetUnfolder]: 81805/102893 cut-off events. [2023-08-30 23:03:25,694 INFO L131 PetriNetUnfolder]: For 21702/21702 co-relation queries the response was YES. [2023-08-30 23:03:25,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226854 conditions, 102893 events. 81805/102893 cut-off events. For 21702/21702 co-relation queries the response was YES. Maximal size of possible extension queue 3167. Compared 543477 event pairs, 62095 based on Foata normal form. 11744/113472 useless extension candidates. Maximal degree in co-relation 114504. Up to 100467 conditions per place. [2023-08-30 23:03:26,177 INFO L137 encePairwiseOnDemand]: 405/411 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 23:03:26,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 227 flow [2023-08-30 23:03:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-08-30 23:03:26,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45255474452554745 [2023-08-30 23:03:26,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-08-30 23:03:26,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-08-30 23:03:26,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:26,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-08-30 23:03:26,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:26,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:26,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:26,182 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 163 flow. Second operand 3 states and 558 transitions. [2023-08-30 23:03:26,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 227 flow [2023-08-30 23:03:26,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:26,199 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 139 flow [2023-08-30 23:03:26,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-30 23:03:26,200 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-30 23:03:26,200 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 139 flow [2023-08-30 23:03:26,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:26,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:26,201 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:26,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 23:03:26,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:26,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:26,201 INFO L85 PathProgramCache]: Analyzing trace with hash 617858253, now seen corresponding path program 1 times [2023-08-30 23:03:26,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166534570] [2023-08-30 23:03:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:26,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:26,210 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:26,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:26,217 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:26,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 23:03:26,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 23:03:26,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 23:03:26,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 23:03:26,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 23:03:26,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 23:03:26,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 23:03:26,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 23:03:26,218 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 23:03:26,219 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:26,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 23:03:26,238 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:26,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 247 transitions, 554 flow [2023-08-30 23:03:26,265 INFO L130 PetriNetUnfolder]: 19/317 cut-off events. [2023-08-30 23:03:26,265 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:03:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 317 events. 19/317 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1026 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 289. Up to 14 conditions per place. [2023-08-30 23:03:26,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 247 transitions, 554 flow [2023-08-30 23:03:26,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 247 transitions, 554 flow [2023-08-30 23:03:26,269 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:26,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 247 transitions, 554 flow [2023-08-30 23:03:26,270 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 247 transitions, 554 flow [2023-08-30 23:03:26,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 247 transitions, 554 flow [2023-08-30 23:03:26,294 INFO L130 PetriNetUnfolder]: 19/317 cut-off events. [2023-08-30 23:03:26,295 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:03:26,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 317 events. 19/317 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1026 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 289. Up to 14 conditions per place. [2023-08-30 23:03:26,306 INFO L119 LiptonReduction]: Number of co-enabled transitions 45576 [2023-08-30 23:03:29,261 INFO L134 LiptonReduction]: Checked pairs total: 57787 [2023-08-30 23:03:29,261 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-08-30 23:03:29,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:29,262 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3251bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:29,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 23:03:29,263 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 23:03:29,263 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:29,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:29,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:29,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:03:29,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash 67447063, now seen corresponding path program 1 times [2023-08-30 23:03:29,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:29,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175873258] [2023-08-30 23:03:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:29,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:03:29,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:29,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175873258] [2023-08-30 23:03:29,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175873258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:29,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:29,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531117485] [2023-08-30 23:03:29,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:29,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:29,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 487 [2023-08-30 23:03:29,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:03:29,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:29,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 487 [2023-08-30 23:03:29,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:05:11,320 INFO L130 PetriNetUnfolder]: 1303053/1553181 cut-off events. [2023-08-30 23:05:11,320 INFO L131 PetriNetUnfolder]: For 355810/355810 co-relation queries the response was YES. [2023-08-30 23:05:13,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225484 conditions, 1553181 events. 1303053/1553181 cut-off events. For 355810/355810 co-relation queries the response was YES. Maximal size of possible extension queue 44456. Compared 8951080 event pairs, 345987 based on Foata normal form. 0/1168070 useless extension candidates. Maximal degree in co-relation 379363. Up to 1480705 conditions per place. [2023-08-30 23:05:19,879 INFO L137 encePairwiseOnDemand]: 473/487 looper letters, 79 selfloop transitions, 7 changer transitions 0/89 dead transitions. [2023-08-30 23:05:19,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 455 flow [2023-08-30 23:05:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:05:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:05:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-30 23:05:19,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791238877481177 [2023-08-30 23:05:19,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-30 23:05:19,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-30 23:05:19,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:05:19,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-30 23:05:19,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:19,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:19,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:19,895 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 168 flow. Second operand 3 states and 700 transitions. [2023-08-30 23:05:19,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 455 flow [2023-08-30 23:05:21,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 405 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-30 23:05:21,075 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 193 flow [2023-08-30 23:05:21,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-30 23:05:21,086 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-30 23:05:21,086 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 193 flow [2023-08-30 23:05:21,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:21,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:21,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:21,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 23:05:21,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:05:21,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -243540146, now seen corresponding path program 1 times [2023-08-30 23:05:21,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:21,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827445740] [2023-08-30 23:05:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:05:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:05:21,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:05:21,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827445740] [2023-08-30 23:05:21,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827445740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:05:21,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:05:21,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:05:21,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568020724] [2023-08-30 23:05:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:05:21,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:05:21,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:05:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:05:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:05:21,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 487 [2023-08-30 23:05:21,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:21,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:05:21,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 487 [2023-08-30 23:05:21,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand