./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/01b_inc.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-ext/01b_inc.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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:40:39,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:40:39,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:40:39,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:40:39,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:40:39,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:40:39,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:40:39,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:40:39,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:40:39,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:40:39,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:40:39,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:40:39,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:40:39,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:40:39,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:40:39,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:40:39,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:40:39,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:40:39,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:40:39,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:40:39,319 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:40:39,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:40:39,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:40:39,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:40:39,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:40:39,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:40:39,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:40:39,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:40:39,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:40:39,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:40:39,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:40:39,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:40:39,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:40:39,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:40:39,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:40:39,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:40:39,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:40:39,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:40:39,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:40:39,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:40:39,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:40:39,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:40:39,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:40:39,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:40:39,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:40:39,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:40:39,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:40:39,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:40:39,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:40:39,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:40:39,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:40:39,352 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:40:39,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:40:39,353 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:40:39,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:40:39,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:40:39,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:40:39,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:40:39,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:40:39,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:40:39,354 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:40:39,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:40:39,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:40:39,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:40:39,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:40:39,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:40:39,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:40:39,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:40:39,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:40:39,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:40:39,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:40:39,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:40:39,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:40:39,356 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:40:39,356 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:40:39,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:40:39,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 [2022-07-13 21:40:39,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:40:39,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:40:39,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:40:39,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:40:39,565 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:40:39,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/01b_inc.i [2022-07-13 21:40:39,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0213c74ad/ce005b2b9d204a519f285a3fd153ff0f/FLAGd1d608ed8 [2022-07-13 21:40:39,971 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:40:39,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/01b_inc.i [2022-07-13 21:40:39,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0213c74ad/ce005b2b9d204a519f285a3fd153ff0f/FLAGd1d608ed8 [2022-07-13 21:40:40,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0213c74ad/ce005b2b9d204a519f285a3fd153ff0f [2022-07-13 21:40:40,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:40:40,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:40:40,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:40:40,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:40:40,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:40:40,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f565cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40, skipping insertion in model container [2022-07-13 21:40:40,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:40:40,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:40:40,531 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:40:40,631 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-ext/01b_inc.i[31005,31018] [2022-07-13 21:40:40,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:40:40,643 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:40:40,669 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:40:40,680 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-ext/01b_inc.i[31005,31018] [2022-07-13 21:40:40,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:40:40,715 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:40:40,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40 WrapperNode [2022-07-13 21:40:40,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:40:40,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:40:40,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:40:40,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:40:40,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,743 INFO L137 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2022-07-13 21:40:40,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:40:40,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:40:40,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:40:40,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:40:40,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:40:40,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:40:40,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:40:40,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:40:40,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (1/1) ... [2022-07-13 21:40:40,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:40:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:40,785 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 21:40:40,786 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 21:40:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-13 21:40:40,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-13 21:40:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:40:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:40:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:40:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:40:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:40:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:40:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:40:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:40:40,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:40:40,818 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 21:40:40,887 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:40:40,888 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:40:41,014 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:40:41,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:40:41,051 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 21:40:41,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:40:41 BoogieIcfgContainer [2022-07-13 21:40:41,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:40:41,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:40:41,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:40:41,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:40:41,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:40:40" (1/3) ... [2022-07-13 21:40:41,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b6af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:40:41, skipping insertion in model container [2022-07-13 21:40:41,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:40" (2/3) ... [2022-07-13 21:40:41,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b6af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:40:41, skipping insertion in model container [2022-07-13 21:40:41,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:40:41" (3/3) ... [2022-07-13 21:40:41,072 INFO L111 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2022-07-13 21:40:41,076 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:40:41,083 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:40:41,083 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:40:41,083 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:40:41,118 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:41,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2022-07-13 21:40:41,160 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-13 21:40:41,160 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:40:41,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 55 events. 3/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2022-07-13 21:40:41,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 93 flow [2022-07-13 21:40:41,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 93 flow [2022-07-13 21:40:41,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:41,177 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@4a7d9a93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2bc5a1dc [2022-07-13 21:40:41,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:40:41,185 INFO L129 PetriNetUnfolder]: 2/49 cut-off events. [2022-07-13 21:40:41,185 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:40:41,185 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:41,186 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:41,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:40:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:41,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1465134151, now seen corresponding path program 1 times [2022-07-13 21:40:41,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193147173] [2022-07-13 21:40:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:41,288 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:40:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:41,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:40:41,340 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:40:41,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-13 21:40:41,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-13 21:40:41,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-13 21:40:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:40:41,343 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:40:41,346 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:40:41,346 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:40:41,374 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:41,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 61 places, 59 transitions, 130 flow [2022-07-13 21:40:41,393 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2022-07-13 21:40:41,394 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:40:41,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 83 events. 5/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 149 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 56. Up to 6 conditions per place. [2022-07-13 21:40:41,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 59 transitions, 130 flow [2022-07-13 21:40:41,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 59 transitions, 130 flow [2022-07-13 21:40:41,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:41,403 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@4a7d9a93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2bc5a1dc [2022-07-13 21:40:41,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:40:41,411 INFO L129 PetriNetUnfolder]: 3/56 cut-off events. [2022-07-13 21:40:41,411 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:40:41,411 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:41,411 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] [2022-07-13 21:40:41,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:40:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1378291579, now seen corresponding path program 1 times [2022-07-13 21:40:41,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936069885] [2022-07-13 21:40:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:41,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:41,588 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 21:40:41,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:41,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936069885] [2022-07-13 21:40:41,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936069885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:41,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:41,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:40:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037959849] [2022-07-13 21:40:41,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:40:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:40:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:40:41,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 59 [2022-07-13 21:40:41,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 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 21:40:41,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:41,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 59 [2022-07-13 21:40:41,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:41,827 INFO L129 PetriNetUnfolder]: 85/311 cut-off events. [2022-07-13 21:40:41,828 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-13 21:40:41,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 311 events. 85/311 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1516 event pairs, 37 based on Foata normal form. 122/394 useless extension candidates. Maximal degree in co-relation 416. Up to 69 conditions per place. [2022-07-13 21:40:41,831 INFO L132 encePairwiseOnDemand]: 49/59 looper letters, 40 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2022-07-13 21:40:41,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 278 flow [2022-07-13 21:40:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:40:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:40:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 273 transitions. [2022-07-13 21:40:41,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7711864406779662 [2022-07-13 21:40:41,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 273 transitions. [2022-07-13 21:40:41,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 273 transitions. [2022-07-13 21:40:41,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:41,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 273 transitions. [2022-07-13 21:40:41,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 0 states have call successors, (0), 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 21:40:41,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 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 21:40:41,856 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 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 21:40:41,857 INFO L186 Difference]: Start difference. First operand has 61 places, 59 transitions, 130 flow. Second operand 6 states and 273 transitions. [2022-07-13 21:40:41,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 278 flow [2022-07-13 21:40:41,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 276 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:41,861 INFO L242 Difference]: Finished difference. Result has 64 places, 58 transitions, 170 flow [2022-07-13 21:40:41,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2022-07-13 21:40:41,865 INFO L279 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2022-07-13 21:40:41,865 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 170 flow [2022-07-13 21:40:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 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 21:40:41,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:41,865 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:40:41,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:40:41,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:41,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1144847341, now seen corresponding path program 1 times [2022-07-13 21:40:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287192832] [2022-07-13 21:40:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:41,879 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:40:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:41,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:40:41,890 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:40:41,890 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:40:41,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:40:41,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-13 21:40:41,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:40:41,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:40:41,891 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:40:41,891 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:40:41,891 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:40:41,903 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:41,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 169 flow [2022-07-13 21:40:41,913 INFO L129 PetriNetUnfolder]: 7/111 cut-off events. [2022-07-13 21:40:41,913 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:40:41,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 111 events. 7/111 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 234 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 87. Up to 8 conditions per place. [2022-07-13 21:40:41,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 169 flow [2022-07-13 21:40:41,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 74 transitions, 169 flow [2022-07-13 21:40:41,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:41,916 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@4a7d9a93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2bc5a1dc [2022-07-13 21:40:41,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:40:41,934 INFO L129 PetriNetUnfolder]: 3/54 cut-off events. [2022-07-13 21:40:41,934 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:40:41,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:41,934 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] [2022-07-13 21:40:41,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:40:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1314245879, now seen corresponding path program 1 times [2022-07-13 21:40:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914906519] [2022-07-13 21:40:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:41,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:42,060 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 21:40:42,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914906519] [2022-07-13 21:40:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914906519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:42,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:42,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:40:42,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132415913] [2022-07-13 21:40:42,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:42,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:40:42,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:42,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:40:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:40:42,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 74 [2022-07-13 21:40:42,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 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 21:40:42,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:42,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 74 [2022-07-13 21:40:42,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:42,679 INFO L129 PetriNetUnfolder]: 2447/4992 cut-off events. [2022-07-13 21:40:42,680 INFO L130 PetriNetUnfolder]: For 784/784 co-relation queries the response was YES. [2022-07-13 21:40:42,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9480 conditions, 4992 events. 2447/4992 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 39384 event pairs, 1117 based on Foata normal form. 1519/5687 useless extension candidates. Maximal degree in co-relation 4058. Up to 1793 conditions per place. [2022-07-13 21:40:42,725 INFO L132 encePairwiseOnDemand]: 62/74 looper letters, 89 selfloop transitions, 12 changer transitions 0/136 dead transitions. [2022-07-13 21:40:42,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 136 transitions, 533 flow [2022-07-13 21:40:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:40:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:40:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 357 transitions. [2022-07-13 21:40:42,728 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8040540540540541 [2022-07-13 21:40:42,728 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 357 transitions. [2022-07-13 21:40:42,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 357 transitions. [2022-07-13 21:40:42,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:42,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 357 transitions. [2022-07-13 21:40:42,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 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 21:40:42,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 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 21:40:42,733 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 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 21:40:42,734 INFO L186 Difference]: Start difference. First operand has 77 places, 74 transitions, 169 flow. Second operand 6 states and 357 transitions. [2022-07-13 21:40:42,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 136 transitions, 533 flow [2022-07-13 21:40:42,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 136 transitions, 519 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:42,739 INFO L242 Difference]: Finished difference. Result has 80 places, 79 transitions, 240 flow [2022-07-13 21:40:42,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2022-07-13 21:40:42,740 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-07-13 21:40:42,741 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 240 flow [2022-07-13 21:40:42,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 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 21:40:42,741 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:42,742 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:40:42,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:40:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -465754956, now seen corresponding path program 1 times [2022-07-13 21:40:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:42,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775072995] [2022-07-13 21:40:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:42,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:42,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775072995] [2022-07-13 21:40:42,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775072995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:42,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:42,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:40:42,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899513853] [2022-07-13 21:40:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:40:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:40:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:40:42,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 74 [2022-07-13 21:40:42,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 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 21:40:42,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:42,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 74 [2022-07-13 21:40:42,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:43,535 INFO L129 PetriNetUnfolder]: 3323/6727 cut-off events. [2022-07-13 21:40:43,536 INFO L130 PetriNetUnfolder]: For 2023/2033 co-relation queries the response was YES. [2022-07-13 21:40:43,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14478 conditions, 6727 events. 3323/6727 cut-off events. For 2023/2033 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 55943 event pairs, 1227 based on Foata normal form. 10/6146 useless extension candidates. Maximal degree in co-relation 14385. Up to 2718 conditions per place. [2022-07-13 21:40:43,592 INFO L132 encePairwiseOnDemand]: 67/74 looper letters, 94 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2022-07-13 21:40:43,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 149 transitions, 694 flow [2022-07-13 21:40:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:40:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:40:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 341 transitions. [2022-07-13 21:40:43,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7680180180180181 [2022-07-13 21:40:43,598 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 341 transitions. [2022-07-13 21:40:43,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 341 transitions. [2022-07-13 21:40:43,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:43,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 341 transitions. [2022-07-13 21:40:43,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 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 21:40:43,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 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 21:40:43,601 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 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 21:40:43,601 INFO L186 Difference]: Start difference. First operand has 80 places, 79 transitions, 240 flow. Second operand 6 states and 341 transitions. [2022-07-13 21:40:43,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 149 transitions, 694 flow [2022-07-13 21:40:43,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 149 transitions, 694 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:43,613 INFO L242 Difference]: Finished difference. Result has 87 places, 91 transitions, 370 flow [2022-07-13 21:40:43,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2022-07-13 21:40:43,615 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 10 predicate places. [2022-07-13 21:40:43,616 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 370 flow [2022-07-13 21:40:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 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 21:40:43,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:43,616 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:43,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:40:43,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:40:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash 670576747, now seen corresponding path program 1 times [2022-07-13 21:40:43,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:43,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164733454] [2022-07-13 21:40:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:43,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:43,653 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:40:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:43,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:40:43,669 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:40:43,669 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:40:43,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:40:43,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-13 21:40:43,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:40:43,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:40:43,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:40:43,671 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:40:43,671 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:40:43,671 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:40:43,698 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:43,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 93 places, 89 transitions, 210 flow [2022-07-13 21:40:43,714 INFO L129 PetriNetUnfolder]: 9/139 cut-off events. [2022-07-13 21:40:43,714 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:40:43,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 139 events. 9/139 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 299 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 119. Up to 10 conditions per place. [2022-07-13 21:40:43,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 89 transitions, 210 flow [2022-07-13 21:40:43,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 89 transitions, 210 flow [2022-07-13 21:40:43,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:43,721 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@4a7d9a93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2bc5a1dc [2022-07-13 21:40:43,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:40:43,724 INFO L129 PetriNetUnfolder]: 2/51 cut-off events. [2022-07-13 21:40:43,724 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:40:43,724 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:43,724 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] [2022-07-13 21:40:43,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:40:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash -781406249, now seen corresponding path program 1 times [2022-07-13 21:40:43,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:43,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291850854] [2022-07-13 21:40:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:43,780 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 21:40:43,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:43,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291850854] [2022-07-13 21:40:43,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291850854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:43,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:43,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:40:43,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149390972] [2022-07-13 21:40:43,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:43,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:40:43,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:40:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:40:43,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2022-07-13 21:40:43,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 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 21:40:43,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:43,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2022-07-13 21:40:43,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:48,580 INFO L129 PetriNetUnfolder]: 44351/70797 cut-off events. [2022-07-13 21:40:48,580 INFO L130 PetriNetUnfolder]: For 15385/15385 co-relation queries the response was YES. [2022-07-13 21:40:48,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139247 conditions, 70797 events. 44351/70797 cut-off events. For 15385/15385 co-relation queries the response was YES. Maximal size of possible extension queue 3210. Compared 618927 event pairs, 21629 based on Foata normal form. 17293/74856 useless extension candidates. Maximal degree in co-relation 58478. Up to 30317 conditions per place. [2022-07-13 21:40:49,485 INFO L132 encePairwiseOnDemand]: 75/89 looper letters, 126 selfloop transitions, 15 changer transitions 0/181 dead transitions. [2022-07-13 21:40:49,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 181 transitions, 750 flow [2022-07-13 21:40:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:40:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:40:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-07-13 21:40:49,487 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8033707865168539 [2022-07-13 21:40:49,487 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-07-13 21:40:49,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-07-13 21:40:49,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:49,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-07-13 21:40:49,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 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 21:40:49,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 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 21:40:49,490 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 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 21:40:49,490 INFO L186 Difference]: Start difference. First operand has 93 places, 89 transitions, 210 flow. Second operand 6 states and 429 transitions. [2022-07-13 21:40:49,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 181 transitions, 750 flow [2022-07-13 21:40:49,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 181 transitions, 714 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:49,496 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 302 flow [2022-07-13 21:40:49,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-07-13 21:40:49,496 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, 3 predicate places. [2022-07-13 21:40:49,497 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 302 flow [2022-07-13 21:40:49,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 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 21:40:49,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:49,497 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:49,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:40:49,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:40:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1373759277, now seen corresponding path program 1 times [2022-07-13 21:40:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:49,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910433027] [2022-07-13 21:40:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:49,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910433027] [2022-07-13 21:40:49,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910433027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:49,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:49,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:40:49,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460983988] [2022-07-13 21:40:49,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:40:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:40:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:40:49,586 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2022-07-13 21:40:49,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 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 21:40:49,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:49,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2022-07-13 21:40:49,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:57,620 INFO L129 PetriNetUnfolder]: 69435/112976 cut-off events. [2022-07-13 21:40:57,621 INFO L130 PetriNetUnfolder]: For 39628/39694 co-relation queries the response was YES. [2022-07-13 21:40:58,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 249371 conditions, 112976 events. 69435/112976 cut-off events. For 39628/39694 co-relation queries the response was YES. Maximal size of possible extension queue 4671. Compared 1076890 event pairs, 26947 based on Foata normal form. 66/102479 useless extension candidates. Maximal degree in co-relation 249277. Up to 51002 conditions per place. [2022-07-13 21:40:58,855 INFO L132 encePairwiseOnDemand]: 81/89 looper letters, 137 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2022-07-13 21:40:58,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 203 transitions, 975 flow [2022-07-13 21:40:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:40:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:40:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 411 transitions. [2022-07-13 21:40:58,857 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7696629213483146 [2022-07-13 21:40:58,857 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 411 transitions. [2022-07-13 21:40:58,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 411 transitions. [2022-07-13 21:40:58,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:58,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 411 transitions. [2022-07-13 21:40:58,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.5) internal successors, (411), 6 states have internal predecessors, (411), 0 states have call successors, (0), 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 21:40:58,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 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 21:40:58,859 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 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 21:40:58,859 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 302 flow. Second operand 6 states and 411 transitions. [2022-07-13 21:40:58,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 203 transitions, 975 flow [2022-07-13 21:40:59,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 203 transitions, 975 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:59,119 INFO L242 Difference]: Finished difference. Result has 103 places, 114 transitions, 473 flow [2022-07-13 21:40:59,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=473, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2022-07-13 21:40:59,120 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, 10 predicate places. [2022-07-13 21:40:59,120 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 473 flow [2022-07-13 21:40:59,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 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 21:40:59,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:59,120 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:40:59,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:40:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2119532954, now seen corresponding path program 1 times [2022-07-13 21:40:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:59,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606604160] [2022-07-13 21:40:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:59,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:59,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606604160] [2022-07-13 21:40:59,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606604160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:59,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:59,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:40:59,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982310013] [2022-07-13 21:40:59,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:59,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:40:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:40:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:40:59,197 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 89 [2022-07-13 21:40:59,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 473 flow. Second operand has 7 states, 7 states have (on average 46.142857142857146) internal successors, (323), 7 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:40:59,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:59,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 89 [2022-07-13 21:40:59,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:41:07,622 INFO L129 PetriNetUnfolder]: 73221/118472 cut-off events. [2022-07-13 21:41:07,622 INFO L130 PetriNetUnfolder]: For 79719/79719 co-relation queries the response was YES. [2022-07-13 21:41:08,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 280012 conditions, 118472 events. 73221/118472 cut-off events. For 79719/79719 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 1128345 event pairs, 35299 based on Foata normal form. 1727/111926 useless extension candidates. Maximal degree in co-relation 264286. Up to 48918 conditions per place. [2022-07-13 21:41:09,003 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 199 selfloop transitions, 29 changer transitions 0/267 dead transitions. [2022-07-13 21:41:09,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 267 transitions, 1398 flow [2022-07-13 21:41:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:41:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:41:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-07-13 21:41:09,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7702871410736579 [2022-07-13 21:41:09,006 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-07-13 21:41:09,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-07-13 21:41:09,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:41:09,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-07-13 21:41:09,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 0 states have call successors, (0), 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 21:41:09,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 89.0) internal successors, (890), 10 states have internal predecessors, (890), 0 states have call successors, (0), 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 21:41:09,008 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 89.0) internal successors, (890), 10 states have internal predecessors, (890), 0 states have call successors, (0), 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 21:41:09,009 INFO L186 Difference]: Start difference. First operand has 103 places, 114 transitions, 473 flow. Second operand 9 states and 617 transitions. [2022-07-13 21:41:09,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 267 transitions, 1398 flow [2022-07-13 21:41:09,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 267 transitions, 1398 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:41:09,100 INFO L242 Difference]: Finished difference. Result has 115 places, 121 transitions, 618 flow [2022-07-13 21:41:09,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=618, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2022-07-13 21:41:09,100 INFO L279 CegarLoopForPetriNet]: 93 programPoint places, 22 predicate places. [2022-07-13 21:41:09,101 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 618 flow [2022-07-13 21:41:09,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.142857142857146) internal successors, (323), 7 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:41:09,101 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:09,101 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:41:09,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:41:09,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:41:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash -248224180, now seen corresponding path program 2 times [2022-07-13 21:41:09,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:09,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151553243] [2022-07-13 21:41:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:09,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:41:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:41:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:41:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151553243] [2022-07-13 21:41:09,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151553243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:41:09,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:41:09,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:41:09,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147357790] [2022-07-13 21:41:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:41:09,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:41:09,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:41:09,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:41:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:41:09,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 89 [2022-07-13 21:41:09,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 46.5) internal successors, (279), 6 states have internal predecessors, (279), 0 states have call successors, (0), 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 21:41:09,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:41:09,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 89 [2022-07-13 21:41:09,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand