./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe023_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe023_tso.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 b87483e693fd72a28f6c7edd484e610e6e0dbb17679c8092f6f9c9cd35d4acca --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:50:04,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:50:04,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:50:04,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:50:04,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:50:04,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:50:04,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:50:04,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:50:04,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:50:04,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:50:04,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:50:04,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:50:04,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:50:04,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:50:04,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:50:04,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:50:04,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:50:04,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:50:04,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:50:04,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:50:04,058 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:50:04,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:50:04,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:50:04,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:50:04,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:50:04,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:50:04,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:50:04,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:50:04,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:50:04,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:50:04,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:50:04,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:50:04,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:50:04,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:50:04,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:50:04,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:50:04,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:50:04,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:50:04,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:50:04,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:50:04,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:50:04,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:50:04,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:50:04,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:50:04,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:50:04,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:50:04,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:50:04,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:50:04,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:50:04,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:50:04,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:50:04,109 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:50:04,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:50:04,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:50:04,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:50:04,112 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:50:04,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:50:04,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:50:04,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:50:04,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:50:04,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:50:04,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:50:04,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:50:04,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:50:04,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:50:04,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:50:04,113 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:50:04,113 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:50:04,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:50:04,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b87483e693fd72a28f6c7edd484e610e6e0dbb17679c8092f6f9c9cd35d4acca [2022-07-13 21:50:04,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:50:04,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:50:04,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:50:04,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:50:04,318 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:50:04,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe023_tso.i [2022-07-13 21:50:04,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1b50bdf/0f4d45bdfa00462f81db8ab931096753/FLAGbccb282ea [2022-07-13 21:50:04,739 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:50:04,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe023_tso.i [2022-07-13 21:50:04,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1b50bdf/0f4d45bdfa00462f81db8ab931096753/FLAGbccb282ea [2022-07-13 21:50:05,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1b50bdf/0f4d45bdfa00462f81db8ab931096753 [2022-07-13 21:50:05,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:50:05,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:50:05,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:50:05,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:50:05,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:50:05,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ef7256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05, skipping insertion in model container [2022-07-13 21:50:05,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:50:05,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:50:05,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe023_tso.i[945,958] [2022-07-13 21:50:05,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:50:05,454 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:50:05,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe023_tso.i[945,958] [2022-07-13 21:50:05,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:50:05,517 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:50:05,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05 WrapperNode [2022-07-13 21:50:05,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:50:05,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:50:05,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:50:05,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:50:05,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,566 INFO L137 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-07-13 21:50:05,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:50:05,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:50:05,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:50:05,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:50:05,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:50:05,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:50:05,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:50:05,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:50:05,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (1/1) ... [2022-07-13 21:50:05,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:50:05,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:50:05,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:50:05,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:50:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:50:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:50:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:50:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:50:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:50:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-07-13 21:50:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-07-13 21:50:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-07-13 21:50:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-07-13 21:50:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-07-13 21:50:05,638 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-07-13 21:50:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:50:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:50:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:50:05,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:50:05,639 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:50:05,747 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:50:05,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:50:05,873 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:50:05,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:50:05,878 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 21:50:05,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:50:05 BoogieIcfgContainer [2022-07-13 21:50:05,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:50:05,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:50:05,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:50:05,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:50:05,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:50:05" (1/3) ... [2022-07-13 21:50:05,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abff9f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:50:05, skipping insertion in model container [2022-07-13 21:50:05,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:05" (2/3) ... [2022-07-13 21:50:05,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abff9f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:50:05, skipping insertion in model container [2022-07-13 21:50:05,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:50:05" (3/3) ... [2022-07-13 21:50:05,886 INFO L111 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2022-07-13 21:50:05,890 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:50:05,897 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:50:05,898 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:50:05,898 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:50:05,934 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:50:05,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 199 flow [2022-07-13 21:50:06,042 INFO L129 PetriNetUnfolder]: 2/89 cut-off events. [2022-07-13 21:50:06,043 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:50:06,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2022-07-13 21:50:06,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 199 flow [2022-07-13 21:50:06,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 159 flow [2022-07-13 21:50:06,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:50:06,091 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@29f343df, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3c684dc1 [2022-07-13 21:50:06,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:50:06,115 INFO L129 PetriNetUnfolder]: 1/74 cut-off events. [2022-07-13 21:50:06,115 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:50:06,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:06,116 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:06,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1011825075, now seen corresponding path program 1 times [2022-07-13 21:50:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:06,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991923547] [2022-07-13 21:50:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991923547] [2022-07-13 21:50:06,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991923547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:06,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:06,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:50:06,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000802505] [2022-07-13 21:50:06,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:06,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:50:06,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:50:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:50:06,536 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-13 21:50:06,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:06,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:06,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-13 21:50:06,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:06,888 INFO L129 PetriNetUnfolder]: 331/774 cut-off events. [2022-07-13 21:50:06,888 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-13 21:50:06,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1364 conditions, 774 events. 331/774 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4101 event pairs, 14 based on Foata normal form. 28/770 useless extension candidates. Maximal degree in co-relation 1326. Up to 173 conditions per place. [2022-07-13 21:50:06,896 INFO L132 encePairwiseOnDemand]: 80/92 looper letters, 22 selfloop transitions, 7 changer transitions 47/132 dead transitions. [2022-07-13 21:50:06,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 425 flow [2022-07-13 21:50:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 21:50:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 21:50:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 992 transitions. [2022-07-13 21:50:06,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8294314381270903 [2022-07-13 21:50:06,914 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 992 transitions. [2022-07-13 21:50:06,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 992 transitions. [2022-07-13 21:50:06,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:06,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 992 transitions. [2022-07-13 21:50:06,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.3076923076923) internal successors, (992), 13 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:06,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:06,929 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:06,930 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 159 flow. Second operand 13 states and 992 transitions. [2022-07-13 21:50:06,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 425 flow [2022-07-13 21:50:06,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 132 transitions, 422 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:50:06,935 INFO L242 Difference]: Finished difference. Result has 105 places, 78 transitions, 244 flow [2022-07-13 21:50:06,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=244, PETRI_PLACES=105, PETRI_TRANSITIONS=78} [2022-07-13 21:50:06,939 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2022-07-13 21:50:06,940 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 78 transitions, 244 flow [2022-07-13 21:50:06,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:06,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:06,940 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:06,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:50:06,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1758137004, now seen corresponding path program 1 times [2022-07-13 21:50:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:06,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249630722] [2022-07-13 21:50:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:07,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:07,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249630722] [2022-07-13 21:50:07,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249630722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:07,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:07,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:50:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190359481] [2022-07-13 21:50:07,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:50:07,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:50:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:50:07,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-13 21:50:07,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 78 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:07,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-13 21:50:07,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:07,257 INFO L129 PetriNetUnfolder]: 146/538 cut-off events. [2022-07-13 21:50:07,258 INFO L130 PetriNetUnfolder]: For 1073/1303 co-relation queries the response was YES. [2022-07-13 21:50:07,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1567 conditions, 538 events. 146/538 cut-off events. For 1073/1303 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2970 event pairs, 10 based on Foata normal form. 19/539 useless extension candidates. Maximal degree in co-relation 1516. Up to 127 conditions per place. [2022-07-13 21:50:07,261 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 28 selfloop transitions, 7 changer transitions 44/135 dead transitions. [2022-07-13 21:50:07,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 812 flow [2022-07-13 21:50:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 21:50:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 21:50:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 975 transitions. [2022-07-13 21:50:07,263 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8152173913043478 [2022-07-13 21:50:07,263 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 975 transitions. [2022-07-13 21:50:07,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 975 transitions. [2022-07-13 21:50:07,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:07,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 975 transitions. [2022-07-13 21:50:07,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.0) internal successors, (975), 13 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,268 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,268 INFO L186 Difference]: Start difference. First operand has 105 places, 78 transitions, 244 flow. Second operand 13 states and 975 transitions. [2022-07-13 21:50:07,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 812 flow [2022-07-13 21:50:07,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 776 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-07-13 21:50:07,278 INFO L242 Difference]: Finished difference. Result has 116 places, 81 transitions, 315 flow [2022-07-13 21:50:07,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=315, PETRI_PLACES=116, PETRI_TRANSITIONS=81} [2022-07-13 21:50:07,279 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2022-07-13 21:50:07,279 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 81 transitions, 315 flow [2022-07-13 21:50:07,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,280 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:07,280 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:50:07,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 26176765, now seen corresponding path program 1 times [2022-07-13 21:50:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639117551] [2022-07-13 21:50:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:07,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:07,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639117551] [2022-07-13 21:50:07,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639117551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:07,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:07,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:50:07,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767336105] [2022-07-13 21:50:07,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:07,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:50:07,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:50:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:50:07,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2022-07-13 21:50:07,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 81 transitions, 315 flow. Second operand has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:07,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2022-07-13 21:50:07,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:07,568 INFO L129 PetriNetUnfolder]: 46/348 cut-off events. [2022-07-13 21:50:07,568 INFO L130 PetriNetUnfolder]: For 1082/1233 co-relation queries the response was YES. [2022-07-13 21:50:07,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 348 events. 46/348 cut-off events. For 1082/1233 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1773 event pairs, 3 based on Foata normal form. 11/348 useless extension candidates. Maximal degree in co-relation 971. Up to 55 conditions per place. [2022-07-13 21:50:07,571 INFO L132 encePairwiseOnDemand]: 80/92 looper letters, 25 selfloop transitions, 13 changer transitions 28/122 dead transitions. [2022-07-13 21:50:07,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 122 transitions, 836 flow [2022-07-13 21:50:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 21:50:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 21:50:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 966 transitions. [2022-07-13 21:50:07,574 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8076923076923077 [2022-07-13 21:50:07,574 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 966 transitions. [2022-07-13 21:50:07,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 966 transitions. [2022-07-13 21:50:07,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:07,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 966 transitions. [2022-07-13 21:50:07,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.3076923076923) internal successors, (966), 13 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,579 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,579 INFO L186 Difference]: Start difference. First operand has 116 places, 81 transitions, 315 flow. Second operand 13 states and 966 transitions. [2022-07-13 21:50:07,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 122 transitions, 836 flow [2022-07-13 21:50:07,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 122 transitions, 712 flow, removed 59 selfloop flow, removed 7 redundant places. [2022-07-13 21:50:07,585 INFO L242 Difference]: Finished difference. Result has 124 places, 86 transitions, 423 flow [2022-07-13 21:50:07,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=423, PETRI_PLACES=124, PETRI_TRANSITIONS=86} [2022-07-13 21:50:07,587 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 40 predicate places. [2022-07-13 21:50:07,588 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 86 transitions, 423 flow [2022-07-13 21:50:07,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:07,588 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:07,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:50:07,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -363933122, now seen corresponding path program 1 times [2022-07-13 21:50:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:07,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914884669] [2022-07-13 21:50:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:07,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:07,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914884669] [2022-07-13 21:50:07,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914884669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:07,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:07,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:50:07,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747218521] [2022-07-13 21:50:07,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:07,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:50:07,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:50:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:50:07,686 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:50:07,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 86 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:07,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:50:07,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:07,796 INFO L129 PetriNetUnfolder]: 22/209 cut-off events. [2022-07-13 21:50:07,797 INFO L130 PetriNetUnfolder]: For 651/828 co-relation queries the response was YES. [2022-07-13 21:50:07,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 209 events. 22/209 cut-off events. For 651/828 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 822 event pairs, 1 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 553. Up to 23 conditions per place. [2022-07-13 21:50:07,799 INFO L132 encePairwiseOnDemand]: 84/92 looper letters, 10 selfloop transitions, 5 changer transitions 22/100 dead transitions. [2022-07-13 21:50:07,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 100 transitions, 579 flow [2022-07-13 21:50:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:50:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:50:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 778 transitions. [2022-07-13 21:50:07,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8456521739130435 [2022-07-13 21:50:07,801 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 778 transitions. [2022-07-13 21:50:07,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 778 transitions. [2022-07-13 21:50:07,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:07,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 778 transitions. [2022-07-13 21:50:07,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.8) internal successors, (778), 10 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,804 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,804 INFO L186 Difference]: Start difference. First operand has 124 places, 86 transitions, 423 flow. Second operand 10 states and 778 transitions. [2022-07-13 21:50:07,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 100 transitions, 579 flow [2022-07-13 21:50:07,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 100 transitions, 485 flow, removed 47 selfloop flow, removed 15 redundant places. [2022-07-13 21:50:07,809 INFO L242 Difference]: Finished difference. Result has 117 places, 77 transitions, 293 flow [2022-07-13 21:50:07,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=293, PETRI_PLACES=117, PETRI_TRANSITIONS=77} [2022-07-13 21:50:07,810 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2022-07-13 21:50:07,810 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 77 transitions, 293 flow [2022-07-13 21:50:07,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:07,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:07,811 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:07,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:50:07,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash 210064944, now seen corresponding path program 1 times [2022-07-13 21:50:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201086041] [2022-07-13 21:50:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:07,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201086041] [2022-07-13 21:50:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201086041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:07,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:50:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080411250] [2022-07-13 21:50:07,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:50:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:50:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:50:07,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:50:07,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 77 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 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) [2022-07-13 21:50:07,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:07,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:50:07,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:08,006 INFO L129 PetriNetUnfolder]: 154/471 cut-off events. [2022-07-13 21:50:08,006 INFO L130 PetriNetUnfolder]: For 184/211 co-relation queries the response was YES. [2022-07-13 21:50:08,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 471 events. 154/471 cut-off events. For 184/211 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2649 event pairs, 14 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 902. Up to 111 conditions per place. [2022-07-13 21:50:08,009 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 25 selfloop transitions, 14 changer transitions 7/109 dead transitions. [2022-07-13 21:50:08,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 109 transitions, 453 flow [2022-07-13 21:50:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:50:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:50:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2022-07-13 21:50:08,011 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8673913043478261 [2022-07-13 21:50:08,011 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2022-07-13 21:50:08,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2022-07-13 21:50:08,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:08,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2022-07-13 21:50:08,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.8) internal successors, (798), 10 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,015 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,016 INFO L186 Difference]: Start difference. First operand has 117 places, 77 transitions, 293 flow. Second operand 10 states and 798 transitions. [2022-07-13 21:50:08,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 109 transitions, 453 flow [2022-07-13 21:50:08,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 403 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-13 21:50:08,019 INFO L242 Difference]: Finished difference. Result has 112 places, 89 transitions, 346 flow [2022-07-13 21:50:08,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=346, PETRI_PLACES=112, PETRI_TRANSITIONS=89} [2022-07-13 21:50:08,020 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 28 predicate places. [2022-07-13 21:50:08,020 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 89 transitions, 346 flow [2022-07-13 21:50:08,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 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) [2022-07-13 21:50:08,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:08,020 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:50:08,021 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1192792765, now seen corresponding path program 1 times [2022-07-13 21:50:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:08,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540454142] [2022-07-13 21:50:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:08,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540454142] [2022-07-13 21:50:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540454142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:08,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:08,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:50:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81137055] [2022-07-13 21:50:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:50:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:50:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:50:08,103 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:50:08,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 89 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:08,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:50:08,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:08,241 INFO L129 PetriNetUnfolder]: 130/443 cut-off events. [2022-07-13 21:50:08,241 INFO L130 PetriNetUnfolder]: For 857/907 co-relation queries the response was YES. [2022-07-13 21:50:08,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 443 events. 130/443 cut-off events. For 857/907 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2581 event pairs, 0 based on Foata normal form. 12/440 useless extension candidates. Maximal degree in co-relation 1370. Up to 137 conditions per place. [2022-07-13 21:50:08,245 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 21 selfloop transitions, 26 changer transitions 17/127 dead transitions. [2022-07-13 21:50:08,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 127 transitions, 710 flow [2022-07-13 21:50:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 21:50:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 21:50:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1035 transitions. [2022-07-13 21:50:08,247 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8653846153846154 [2022-07-13 21:50:08,247 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1035 transitions. [2022-07-13 21:50:08,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1035 transitions. [2022-07-13 21:50:08,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:08,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1035 transitions. [2022-07-13 21:50:08,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.61538461538461) internal successors, (1035), 13 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,251 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,252 INFO L186 Difference]: Start difference. First operand has 112 places, 89 transitions, 346 flow. Second operand 13 states and 1035 transitions. [2022-07-13 21:50:08,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 127 transitions, 710 flow [2022-07-13 21:50:08,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 127 transitions, 701 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 21:50:08,255 INFO L242 Difference]: Finished difference. Result has 128 places, 101 transitions, 508 flow [2022-07-13 21:50:08,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=508, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2022-07-13 21:50:08,256 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 44 predicate places. [2022-07-13 21:50:08,256 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 508 flow [2022-07-13 21:50:08,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:08,257 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:08,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:50:08,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1608061126, now seen corresponding path program 1 times [2022-07-13 21:50:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311214345] [2022-07-13 21:50:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:08,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:08,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311214345] [2022-07-13 21:50:08,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311214345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:08,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:08,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:50:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53646077] [2022-07-13 21:50:08,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:08,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:50:08,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:50:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:50:08,322 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2022-07-13 21:50:08,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 508 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:08,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2022-07-13 21:50:08,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:08,480 INFO L129 PetriNetUnfolder]: 76/299 cut-off events. [2022-07-13 21:50:08,481 INFO L130 PetriNetUnfolder]: For 1236/1348 co-relation queries the response was YES. [2022-07-13 21:50:08,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 299 events. 76/299 cut-off events. For 1236/1348 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1616 event pairs, 0 based on Foata normal form. 10/294 useless extension candidates. Maximal degree in co-relation 1157. Up to 79 conditions per place. [2022-07-13 21:50:08,483 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 0 selfloop transitions, 0 changer transitions 119/119 dead transitions. [2022-07-13 21:50:08,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 119 transitions, 770 flow [2022-07-13 21:50:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 21:50:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 21:50:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1250 transitions. [2022-07-13 21:50:08,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8491847826086957 [2022-07-13 21:50:08,486 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1250 transitions. [2022-07-13 21:50:08,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1250 transitions. [2022-07-13 21:50:08,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:08,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1250 transitions. [2022-07-13 21:50:08,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 78.125) internal successors, (1250), 16 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 92.0) internal successors, (1564), 17 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,491 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 92.0) internal successors, (1564), 17 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,491 INFO L186 Difference]: Start difference. First operand has 128 places, 101 transitions, 508 flow. Second operand 16 states and 1250 transitions. [2022-07-13 21:50:08,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 119 transitions, 770 flow [2022-07-13 21:50:08,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 119 transitions, 703 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-07-13 21:50:08,496 INFO L242 Difference]: Finished difference. Result has 130 places, 0 transitions, 0 flow [2022-07-13 21:50:08,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=130, PETRI_TRANSITIONS=0} [2022-07-13 21:50:08,496 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2022-07-13 21:50:08,497 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 0 transitions, 0 flow [2022-07-13 21:50:08,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:50:08,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-07-13 21:50:08,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-07-13 21:50:08,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-13 21:50:08,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-07-13 21:50:08,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:50:08,501 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:08,503 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-13 21:50:08,503 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 21:50:08,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:50:08 BasicIcfg [2022-07-13 21:50:08,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 21:50:08,508 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 21:50:08,508 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 21:50:08,508 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 21:50:08,509 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:50:05" (3/4) ... [2022-07-13 21:50:08,510 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 21:50:08,515 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2022-07-13 21:50:08,515 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2022-07-13 21:50:08,515 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2022-07-13 21:50:08,518 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-07-13 21:50:08,518 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-13 21:50:08,519 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 21:50:08,519 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 21:50:08,543 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 21:50:08,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 21:50:08,544 INFO L158 Benchmark]: Toolchain (without parser) took 3382.51ms. Allocated memory was 107.0MB in the beginning and 165.7MB in the end (delta: 58.7MB). Free memory was 66.1MB in the beginning and 118.9MB in the end (delta: -52.8MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. [2022-07-13 21:50:08,544 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 107.0MB. Free memory was 84.0MB in the beginning and 83.9MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:50:08,544 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.84ms. Allocated memory is still 107.0MB. Free memory was 65.8MB in the beginning and 71.8MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 21:50:08,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.19ms. Allocated memory is still 107.0MB. Free memory was 71.8MB in the beginning and 69.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:50:08,545 INFO L158 Benchmark]: Boogie Preprocessor took 14.34ms. Allocated memory is still 107.0MB. Free memory was 69.7MB in the beginning and 68.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:50:08,545 INFO L158 Benchmark]: RCFGBuilder took 297.72ms. Allocated memory is still 107.0MB. Free memory was 68.4MB in the beginning and 56.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 21:50:08,545 INFO L158 Benchmark]: TraceAbstraction took 2626.44ms. Allocated memory was 107.0MB in the beginning and 165.7MB in the end (delta: 58.7MB). Free memory was 55.4MB in the beginning and 121.0MB in the end (delta: -65.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:50:08,546 INFO L158 Benchmark]: Witness Printer took 35.28ms. Allocated memory is still 165.7MB. Free memory was 121.0MB in the beginning and 118.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:50:08,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 107.0MB. Free memory was 84.0MB in the beginning and 83.9MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.84ms. Allocated memory is still 107.0MB. Free memory was 65.8MB in the beginning and 71.8MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.19ms. Allocated memory is still 107.0MB. Free memory was 71.8MB in the beginning and 69.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.34ms. Allocated memory is still 107.0MB. Free memory was 69.7MB in the beginning and 68.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 297.72ms. Allocated memory is still 107.0MB. Free memory was 68.4MB in the beginning and 56.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2626.44ms. Allocated memory was 107.0MB in the beginning and 165.7MB in the end (delta: 58.7MB). Free memory was 55.4MB in the beginning and 121.0MB in the end (delta: -65.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 35.28ms. Allocated memory is still 165.7MB. Free memory was 121.0MB in the beginning and 118.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 316 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 316 mSDsluCounter, 395 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 385 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 454 IncrementalHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 92 mSDtfsCounter, 454 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=508occurred in iteration=6, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 419 ConstructedInterpolants, 0 QuantifiedInterpolants, 1799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-13 21:50:08,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE