./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/fkp2013-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-lit/fkp2013-1.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 ac100ce7c66b3266dc643fb77471441d693f59fe8c56e13ccaa684a73cdda8b0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:10:39,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:10:39,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:10:39,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:10:39,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:10:39,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:10:39,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:10:39,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:10:39,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:10:39,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:10:39,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:10:39,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:10:39,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:10:39,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:10:39,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:10:39,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:10:39,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:10:39,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:10:39,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:10:39,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:10:39,215 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:10:39,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:10:39,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:10:39,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:10:39,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:10:39,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:10:39,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:10:39,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:10:39,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:10:39,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:10:39,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:10:39,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:10:39,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:10:39,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:10:39,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:10:39,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:10:39,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:10:39,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:10:39,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:10:39,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:10:39,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:10:39,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:10:39,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:10:39,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:10:39,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:10:39,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:10:39,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:10:39,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:10:39,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:10:39,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:10:39,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:10:39,260 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:10:39,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:10:39,261 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:10:39,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:10:39,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:10:39,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:10:39,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:10:39,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:10:39,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:10:39,262 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:10:39,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:10:39,263 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:10:39,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:10:39,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:10:39,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:10:39,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:10:39,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:10:39,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:10:39,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:10:39,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:10:39,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:10:39,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:10:39,264 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:10:39,265 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:10:39,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:10:39,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac100ce7c66b3266dc643fb77471441d693f59fe8c56e13ccaa684a73cdda8b0 [2022-07-12 10:10:39,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:10:39,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:10:39,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:10:39,484 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:10:39,484 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:10:39,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/fkp2013-1.i [2022-07-12 10:10:39,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de524ce55/2496f9afe8854baabf90694e7aac7ae2/FLAG3e65974d3 [2022-07-12 10:10:39,956 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:10:39,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2013-1.i [2022-07-12 10:10:39,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de524ce55/2496f9afe8854baabf90694e7aac7ae2/FLAG3e65974d3 [2022-07-12 10:10:39,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de524ce55/2496f9afe8854baabf90694e7aac7ae2 [2022-07-12 10:10:39,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:10:39,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:10:39,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:10:39,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:10:39,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:10:39,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:10:39" (1/1) ... [2022-07-12 10:10:39,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e620d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:39, skipping insertion in model container [2022-07-12 10:10:39,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:10:39" (1/1) ... [2022-07-12 10:10:39,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:10:40,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:10:40,228 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-lit/fkp2013-1.i[30003,30016] [2022-07-12 10:10:40,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:10:40,243 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:10:40,264 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-lit/fkp2013-1.i[30003,30016] [2022-07-12 10:10:40,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:10:40,288 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:10:40,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40 WrapperNode [2022-07-12 10:10:40,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:10:40,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:10:40,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:10:40,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:10:40,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,330 INFO L137 Inliner]: procedures = 172, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-07-12 10:10:40,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:10:40,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:10:40,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:10:40,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:10:40,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:10:40,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:10:40,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:10:40,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:10:40,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (1/1) ... [2022-07-12 10:10:40,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:10:40,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:10:40,380 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) [2022-07-12 10:10:40,398 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 [2022-07-12 10:10:40,409 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-12 10:10:40,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-12 10:10:40,409 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:10:40,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:10:40,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:10:40,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:10:40,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:10:40,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:10:40,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:10:40,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:10:40,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:10:40,411 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:10:40,494 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:10:40,495 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:10:40,600 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:10:40,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:10:40,605 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 10:10:40,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:10:40 BoogieIcfgContainer [2022-07-12 10:10:40,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:10:40,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:10:40,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:10:40,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:10:40,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:10:39" (1/3) ... [2022-07-12 10:10:40,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1224e7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:10:40, skipping insertion in model container [2022-07-12 10:10:40,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:10:40" (2/3) ... [2022-07-12 10:10:40,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1224e7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:10:40, skipping insertion in model container [2022-07-12 10:10:40,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:10:40" (3/3) ... [2022-07-12 10:10:40,612 INFO L111 eAbstractionObserver]: Analyzing ICFG fkp2013-1.i [2022-07-12 10:10:40,630 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:10:40,636 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:10:40,636 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:10:40,636 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:10:40,680 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:10:40,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 68 transitions, 146 flow [2022-07-12 10:10:40,724 INFO L129 PetriNetUnfolder]: 3/81 cut-off events. [2022-07-12 10:10:40,725 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:10:40,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 81 events. 3/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 103 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-07-12 10:10:40,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 68 transitions, 146 flow [2022-07-12 10:10:40,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 67 transitions, 142 flow [2022-07-12 10:10:40,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:10:40,741 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@e9b682d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@635193eb [2022-07-12 10:10:40,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:10:40,749 INFO L129 PetriNetUnfolder]: 1/42 cut-off events. [2022-07-12 10:10:40,749 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:10:40,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:40,750 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:40,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:10:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:40,754 INFO L85 PathProgramCache]: Analyzing trace with hash 702214347, now seen corresponding path program 1 times [2022-07-12 10:10:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648518797] [2022-07-12 10:10:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:40,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648518797] [2022-07-12 10:10:40,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648518797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:40,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:40,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:10:40,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470094655] [2022-07-12 10:10:40,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:40,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:10:40,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:10:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:10:40,986 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 68 [2022-07-12 10:10:40,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 55.4) internal successors, (277), 5 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:40,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:40,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 68 [2022-07-12 10:10:40,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:41,108 INFO L129 PetriNetUnfolder]: 11/142 cut-off events. [2022-07-12 10:10:41,110 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:10:41,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 142 events. 11/142 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 466 event pairs, 2 based on Foata normal form. 20/155 useless extension candidates. Maximal degree in co-relation 165. Up to 10 conditions per place. [2022-07-12 10:10:41,114 INFO L132 encePairwiseOnDemand]: 60/68 looper letters, 16 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2022-07-12 10:10:41,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 216 flow [2022-07-12 10:10:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:10:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:10:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 466 transitions. [2022-07-12 10:10:41,129 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8566176470588235 [2022-07-12 10:10:41,130 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 466 transitions. [2022-07-12 10:10:41,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 466 transitions. [2022-07-12 10:10:41,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:41,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 466 transitions. [2022-07-12 10:10:41,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.25) internal successors, (466), 8 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,147 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,148 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 142 flow. Second operand 8 states and 466 transitions. [2022-07-12 10:10:41,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 216 flow [2022-07-12 10:10:41,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:10:41,158 INFO L242 Difference]: Finished difference. Result has 80 places, 70 transitions, 183 flow [2022-07-12 10:10:41,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=183, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2022-07-12 10:10:41,164 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2022-07-12 10:10:41,164 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 183 flow [2022-07-12 10:10:41,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.4) internal successors, (277), 5 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,165 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:41,165 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, 1] [2022-07-12 10:10:41,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:10:41,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:10:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 30111252, now seen corresponding path program 1 times [2022-07-12 10:10:41,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:41,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184701319] [2022-07-12 10:10:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:41,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:10:41,219 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:10:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:10:41,271 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:10:41,271 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:10:41,272 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:10:41,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:10:41,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-12 10:10:41,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:10:41,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:10:41,275 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:10:41,277 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:10:41,277 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:10:41,300 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:10:41,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 89 transitions, 202 flow [2022-07-12 10:10:41,316 INFO L129 PetriNetUnfolder]: 4/107 cut-off events. [2022-07-12 10:10:41,316 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:10:41,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 107 events. 4/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 143 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 116. Up to 6 conditions per place. [2022-07-12 10:10:41,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 89 transitions, 202 flow [2022-07-12 10:10:41,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 74 transitions, 163 flow [2022-07-12 10:10:41,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:10:41,327 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@e9b682d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@635193eb [2022-07-12 10:10:41,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:10:41,331 INFO L129 PetriNetUnfolder]: 2/46 cut-off events. [2022-07-12 10:10:41,332 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:10:41,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:41,332 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:41,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:10:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -980089482, now seen corresponding path program 1 times [2022-07-12 10:10:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:41,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588343255] [2022-07-12 10:10:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:41,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:41,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588343255] [2022-07-12 10:10:41,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588343255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:41,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:41,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:10:41,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273375453] [2022-07-12 10:10:41,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:41,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:10:41,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:10:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:10:41,382 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 89 [2022-07-12 10:10:41,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:41,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 89 [2022-07-12 10:10:41,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:41,492 INFO L129 PetriNetUnfolder]: 97/386 cut-off events. [2022-07-12 10:10:41,492 INFO L130 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-07-12 10:10:41,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 386 events. 97/386 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2105 event pairs, 6 based on Foata normal form. 95/459 useless extension candidates. Maximal degree in co-relation 625. Up to 55 conditions per place. [2022-07-12 10:10:41,496 INFO L132 encePairwiseOnDemand]: 80/89 looper letters, 42 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2022-07-12 10:10:41,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 377 flow [2022-07-12 10:10:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:10:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:10:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 607 transitions. [2022-07-12 10:10:41,498 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8525280898876404 [2022-07-12 10:10:41,498 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 607 transitions. [2022-07-12 10:10:41,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 607 transitions. [2022-07-12 10:10:41,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:41,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 607 transitions. [2022-07-12 10:10:41,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 75.875) internal successors, (607), 8 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,500 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,500 INFO L186 Difference]: Start difference. First operand has 80 places, 74 transitions, 163 flow. Second operand 8 states and 607 transitions. [2022-07-12 10:10:41,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 377 flow [2022-07-12 10:10:41,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 374 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:10:41,503 INFO L242 Difference]: Finished difference. Result has 90 places, 81 transitions, 236 flow [2022-07-12 10:10:41,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=236, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2022-07-12 10:10:41,503 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 10 predicate places. [2022-07-12 10:10:41,504 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 236 flow [2022-07-12 10:10:41,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:41,504 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:41,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:10:41,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:10:41,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:41,505 INFO L85 PathProgramCache]: Analyzing trace with hash 692131209, now seen corresponding path program 1 times [2022-07-12 10:10:41,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:41,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774537444] [2022-07-12 10:10:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:41,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:41,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774537444] [2022-07-12 10:10:41,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774537444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:41,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:41,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:10:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689410664] [2022-07-12 10:10:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:10:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:10:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:10:41,571 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 89 [2022-07-12 10:10:41,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:41,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 89 [2022-07-12 10:10:41,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:41,826 INFO L129 PetriNetUnfolder]: 131/767 cut-off events. [2022-07-12 10:10:41,826 INFO L130 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2022-07-12 10:10:41,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 767 events. 131/767 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5643 event pairs, 20 based on Foata normal form. 5/739 useless extension candidates. Maximal degree in co-relation 1399. Up to 56 conditions per place. [2022-07-12 10:10:41,833 INFO L132 encePairwiseOnDemand]: 81/89 looper letters, 61 selfloop transitions, 33 changer transitions 0/150 dead transitions. [2022-07-12 10:10:41,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 150 transitions, 727 flow [2022-07-12 10:10:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:10:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:10:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1365 transitions. [2022-07-12 10:10:41,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8072146658781786 [2022-07-12 10:10:41,835 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1365 transitions. [2022-07-12 10:10:41,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1365 transitions. [2022-07-12 10:10:41,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:41,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1365 transitions. [2022-07-12 10:10:41,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 71.84210526315789) internal successors, (1365), 19 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 89.0) internal successors, (1780), 20 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,841 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 89.0) internal successors, (1780), 20 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,841 INFO L186 Difference]: Start difference. First operand has 90 places, 81 transitions, 236 flow. Second operand 19 states and 1365 transitions. [2022-07-12 10:10:41,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 150 transitions, 727 flow [2022-07-12 10:10:41,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 150 transitions, 727 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:10:41,848 INFO L242 Difference]: Finished difference. Result has 118 places, 104 transitions, 498 flow [2022-07-12 10:10:41,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=498, PETRI_PLACES=118, PETRI_TRANSITIONS=104} [2022-07-12 10:10:41,850 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 38 predicate places. [2022-07-12 10:10:41,850 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 104 transitions, 498 flow [2022-07-12 10:10:41,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:41,851 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:41,851 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:41,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:10:41,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:10:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash -196327125, now seen corresponding path program 1 times [2022-07-12 10:10:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088683723] [2022-07-12 10:10:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:10:41,890 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:10:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:10:41,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:10:41,914 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:10:41,914 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:10:41,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:10:41,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-12 10:10:41,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:10:41,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:10:41,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:10:41,918 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:10:41,919 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:10:41,919 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:10:41,945 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:10:41,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 120 places, 110 transitions, 262 flow [2022-07-12 10:10:41,966 INFO L129 PetriNetUnfolder]: 5/133 cut-off events. [2022-07-12 10:10:41,966 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:10:41,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 133 events. 5/133 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-07-12 10:10:41,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 110 transitions, 262 flow [2022-07-12 10:10:41,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 81 transitions, 186 flow [2022-07-12 10:10:41,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:10:41,976 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@e9b682d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@635193eb [2022-07-12 10:10:41,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:10:41,980 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2022-07-12 10:10:41,981 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:10:41,981 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:41,981 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:41,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:10:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash 980719107, now seen corresponding path program 1 times [2022-07-12 10:10:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:41,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315497154] [2022-07-12 10:10:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:42,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315497154] [2022-07-12 10:10:42,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315497154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:42,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:42,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:10:42,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395606859] [2022-07-12 10:10:42,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:42,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:10:42,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:10:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:10:42,051 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 110 [2022-07-12 10:10:42,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:42,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 110 [2022-07-12 10:10:42,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:42,251 INFO L129 PetriNetUnfolder]: 541/1578 cut-off events. [2022-07-12 10:10:42,251 INFO L130 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2022-07-12 10:10:42,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2822 conditions, 1578 events. 541/1578 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11849 event pairs, 184 based on Foata normal form. 274/1742 useless extension candidates. Maximal degree in co-relation 2787. Up to 318 conditions per place. [2022-07-12 10:10:42,265 INFO L132 encePairwiseOnDemand]: 100/110 looper letters, 60 selfloop transitions, 14 changer transitions 0/135 dead transitions. [2022-07-12 10:10:42,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 135 transitions, 520 flow [2022-07-12 10:10:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:10:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:10:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 740 transitions. [2022-07-12 10:10:42,267 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2022-07-12 10:10:42,267 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 740 transitions. [2022-07-12 10:10:42,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 740 transitions. [2022-07-12 10:10:42,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:42,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 740 transitions. [2022-07-12 10:10:42,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 92.5) internal successors, (740), 8 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,269 INFO L186 Difference]: Start difference. First operand has 89 places, 81 transitions, 186 flow. Second operand 8 states and 740 transitions. [2022-07-12 10:10:42,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 135 transitions, 520 flow [2022-07-12 10:10:42,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 135 transitions, 501 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-12 10:10:42,274 INFO L242 Difference]: Finished difference. Result has 99 places, 91 transitions, 278 flow [2022-07-12 10:10:42,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=278, PETRI_PLACES=99, PETRI_TRANSITIONS=91} [2022-07-12 10:10:42,276 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 10 predicate places. [2022-07-12 10:10:42,276 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 91 transitions, 278 flow [2022-07-12 10:10:42,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:42,276 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:42,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:10:42,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:10:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash 941136163, now seen corresponding path program 1 times [2022-07-12 10:10:42,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:42,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789329650] [2022-07-12 10:10:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:42,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:42,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789329650] [2022-07-12 10:10:42,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789329650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:42,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:42,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:10:42,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975018036] [2022-07-12 10:10:42,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:42,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:10:42,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:10:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:10:42,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 110 [2022-07-12 10:10:42,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 91 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 82.57142857142857) internal successors, (578), 7 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:42,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 110 [2022-07-12 10:10:42,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:42,834 INFO L129 PetriNetUnfolder]: 921/3317 cut-off events. [2022-07-12 10:10:42,834 INFO L130 PetriNetUnfolder]: For 2190/2190 co-relation queries the response was YES. [2022-07-12 10:10:42,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7098 conditions, 3317 events. 921/3317 cut-off events. For 2190/2190 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32178 event pairs, 206 based on Foata normal form. 19/3198 useless extension candidates. Maximal degree in co-relation 7057. Up to 415 conditions per place. [2022-07-12 10:10:42,863 INFO L132 encePairwiseOnDemand]: 101/110 looper letters, 122 selfloop transitions, 44 changer transitions 0/226 dead transitions. [2022-07-12 10:10:42,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 226 transitions, 1261 flow [2022-07-12 10:10:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:10:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:10:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1703 transitions. [2022-07-12 10:10:42,866 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8148325358851675 [2022-07-12 10:10:42,866 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1703 transitions. [2022-07-12 10:10:42,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1703 transitions. [2022-07-12 10:10:42,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:42,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1703 transitions. [2022-07-12 10:10:42,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 89.63157894736842) internal successors, (1703), 19 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,874 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,874 INFO L186 Difference]: Start difference. First operand has 99 places, 91 transitions, 278 flow. Second operand 19 states and 1703 transitions. [2022-07-12 10:10:42,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 226 transitions, 1261 flow [2022-07-12 10:10:42,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 226 transitions, 1261 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:10:42,884 INFO L242 Difference]: Finished difference. Result has 128 places, 123 transitions, 661 flow [2022-07-12 10:10:42,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=661, PETRI_PLACES=128, PETRI_TRANSITIONS=123} [2022-07-12 10:10:42,886 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 39 predicate places. [2022-07-12 10:10:42,886 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 123 transitions, 661 flow [2022-07-12 10:10:42,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.57142857142857) internal successors, (578), 7 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,887 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:42,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:42,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:10:42,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:10:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:42,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2121700525, now seen corresponding path program 1 times [2022-07-12 10:10:42,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:42,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777610520] [2022-07-12 10:10:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:42,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:10:42,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:42,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777610520] [2022-07-12 10:10:42,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777610520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:42,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:10:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642057212] [2022-07-12 10:10:42,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:42,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:10:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:10:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:10:42,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 110 [2022-07-12 10:10:42,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 123 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:42,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:42,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 110 [2022-07-12 10:10:42,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:43,609 INFO L129 PetriNetUnfolder]: 1144/3944 cut-off events. [2022-07-12 10:10:43,609 INFO L130 PetriNetUnfolder]: For 10849/10855 co-relation queries the response was YES. [2022-07-12 10:10:43,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12044 conditions, 3944 events. 1144/3944 cut-off events. For 10849/10855 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 40792 event pairs, 281 based on Foata normal form. 33/3859 useless extension candidates. Maximal degree in co-relation 11990. Up to 636 conditions per place. [2022-07-12 10:10:43,686 INFO L132 encePairwiseOnDemand]: 101/110 looper letters, 163 selfloop transitions, 86 changer transitions 0/309 dead transitions. [2022-07-12 10:10:43,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 309 transitions, 2759 flow [2022-07-12 10:10:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:10:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:10:43,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1701 transitions. [2022-07-12 10:10:43,689 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138755980861244 [2022-07-12 10:10:43,689 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1701 transitions. [2022-07-12 10:10:43,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1701 transitions. [2022-07-12 10:10:43,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:43,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1701 transitions. [2022-07-12 10:10:43,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 89.52631578947368) internal successors, (1701), 19 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:43,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:43,695 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:43,695 INFO L186 Difference]: Start difference. First operand has 128 places, 123 transitions, 661 flow. Second operand 19 states and 1701 transitions. [2022-07-12 10:10:43,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 309 transitions, 2759 flow [2022-07-12 10:10:43,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 309 transitions, 2552 flow, removed 83 selfloop flow, removed 3 redundant places. [2022-07-12 10:10:43,790 INFO L242 Difference]: Finished difference. Result has 154 places, 186 transitions, 1550 flow [2022-07-12 10:10:43,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1550, PETRI_PLACES=154, PETRI_TRANSITIONS=186} [2022-07-12 10:10:43,791 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 65 predicate places. [2022-07-12 10:10:43,791 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 186 transitions, 1550 flow [2022-07-12 10:10:43,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:43,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:43,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:43,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:10:43,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:10:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1557261265, now seen corresponding path program 1 times [2022-07-12 10:10:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:43,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408568679] [2022-07-12 10:10:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:43,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408568679] [2022-07-12 10:10:43,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408568679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:10:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847734778] [2022-07-12 10:10:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:43,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:10:43,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:10:43,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:10:43,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:10:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:10:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:10:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:44,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:10:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:44,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847734778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:10:44,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:10:44,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:10:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873299991] [2022-07-12 10:10:44,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:10:44,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:10:44,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:10:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:10:44,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 110 [2022-07-12 10:10:44,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 186 transitions, 1550 flow. Second operand has 18 states, 18 states have (on average 82.0) internal successors, (1476), 18 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:44,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:44,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 110 [2022-07-12 10:10:44,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:45,802 INFO L129 PetriNetUnfolder]: 1451/5580 cut-off events. [2022-07-12 10:10:45,803 INFO L130 PetriNetUnfolder]: For 24278/24278 co-relation queries the response was YES. [2022-07-12 10:10:45,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17928 conditions, 5580 events. 1451/5580 cut-off events. For 24278/24278 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 63147 event pairs, 209 based on Foata normal form. 10/5396 useless extension candidates. Maximal degree in co-relation 17862. Up to 597 conditions per place. [2022-07-12 10:10:45,871 INFO L132 encePairwiseOnDemand]: 100/110 looper letters, 230 selfloop transitions, 192 changer transitions 0/481 dead transitions. [2022-07-12 10:10:45,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 481 transitions, 5027 flow [2022-07-12 10:10:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-12 10:10:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-12 10:10:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4913 transitions. [2022-07-12 10:10:45,878 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7835725677830941 [2022-07-12 10:10:45,878 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4913 transitions. [2022-07-12 10:10:45,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4913 transitions. [2022-07-12 10:10:45,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:45,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4913 transitions. [2022-07-12 10:10:45,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 86.19298245614036) internal successors, (4913), 57 states have internal predecessors, (4913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:45,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 110.0) internal successors, (6380), 58 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:45,897 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 110.0) internal successors, (6380), 58 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:45,897 INFO L186 Difference]: Start difference. First operand has 154 places, 186 transitions, 1550 flow. Second operand 57 states and 4913 transitions. [2022-07-12 10:10:45,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 481 transitions, 5027 flow [2022-07-12 10:10:46,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 481 transitions, 4763 flow, removed 132 selfloop flow, removed 0 redundant places. [2022-07-12 10:10:46,010 INFO L242 Difference]: Finished difference. Result has 232 places, 282 transitions, 3258 flow [2022-07-12 10:10:46,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=3258, PETRI_PLACES=232, PETRI_TRANSITIONS=282} [2022-07-12 10:10:46,010 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 143 predicate places. [2022-07-12 10:10:46,011 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 282 transitions, 3258 flow [2022-07-12 10:10:46,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.0) internal successors, (1476), 18 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:46,011 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:46,011 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:46,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:10:46,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:10:46,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:10:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1737120457, now seen corresponding path program 1 times [2022-07-12 10:10:46,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:46,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760579135] [2022-07-12 10:10:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:46,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:10:46,241 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:10:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:10:46,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:10:46,254 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:10:46,254 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:10:46,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:10:46,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-12 10:10:46,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:10:46,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:10:46,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:10:46,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:10:46,255 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:10:46,255 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:10:46,255 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:10:46,272 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:10:46,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 144 places, 131 transitions, 326 flow [2022-07-12 10:10:46,280 INFO L129 PetriNetUnfolder]: 6/159 cut-off events. [2022-07-12 10:10:46,280 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:10:46,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 159 events. 6/159 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 226 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 179. Up to 10 conditions per place. [2022-07-12 10:10:46,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 131 transitions, 326 flow [2022-07-12 10:10:46,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 88 transitions, 211 flow [2022-07-12 10:10:46,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:10:46,282 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@e9b682d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@635193eb [2022-07-12 10:10:46,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:10:46,283 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2022-07-12 10:10:46,283 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:10:46,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:46,284 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:46,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:10:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2005294478, now seen corresponding path program 1 times [2022-07-12 10:10:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764972245] [2022-07-12 10:10:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:46,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:46,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:46,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764972245] [2022-07-12 10:10:46,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764972245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:46,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:46,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:10:46,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916970868] [2022-07-12 10:10:46,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:46,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:10:46,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:10:46,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:10:46,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 131 [2022-07-12 10:10:46,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:46,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:46,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 131 [2022-07-12 10:10:46,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:46,912 INFO L129 PetriNetUnfolder]: 2465/5719 cut-off events. [2022-07-12 10:10:46,912 INFO L130 PetriNetUnfolder]: For 2918/2918 co-relation queries the response was YES. [2022-07-12 10:10:46,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10838 conditions, 5719 events. 2465/5719 cut-off events. For 2918/2918 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 50370 event pairs, 734 based on Foata normal form. 1002/6427 useless extension candidates. Maximal degree in co-relation 10802. Up to 1465 conditions per place. [2022-07-12 10:10:46,965 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 78 selfloop transitions, 17 changer transitions 0/160 dead transitions. [2022-07-12 10:10:46,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 160 transitions, 677 flow [2022-07-12 10:10:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:10:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:10:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 873 transitions. [2022-07-12 10:10:46,966 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8330152671755725 [2022-07-12 10:10:46,966 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 873 transitions. [2022-07-12 10:10:46,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 873 transitions. [2022-07-12 10:10:46,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:46,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 873 transitions. [2022-07-12 10:10:46,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 109.125) internal successors, (873), 8 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:46,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:46,969 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:46,970 INFO L186 Difference]: Start difference. First operand has 98 places, 88 transitions, 211 flow. Second operand 8 states and 873 transitions. [2022-07-12 10:10:46,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 160 transitions, 677 flow [2022-07-12 10:10:46,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 160 transitions, 628 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-12 10:10:46,972 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 320 flow [2022-07-12 10:10:46,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-07-12 10:10:46,973 INFO L279 CegarLoopForPetriNet]: 98 programPoint places, 10 predicate places. [2022-07-12 10:10:46,973 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 320 flow [2022-07-12 10:10:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:46,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:46,973 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:46,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:10:46,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:10:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1225581279, now seen corresponding path program 1 times [2022-07-12 10:10:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:46,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854817151] [2022-07-12 10:10:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:10:47,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:47,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854817151] [2022-07-12 10:10:47,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854817151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:47,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:47,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:10:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557750787] [2022-07-12 10:10:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:47,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:10:47,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:10:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:10:47,010 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 131 [2022-07-12 10:10:47,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:47,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:47,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 131 [2022-07-12 10:10:47,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:48,321 INFO L129 PetriNetUnfolder]: 4859/11815 cut-off events. [2022-07-12 10:10:48,321 INFO L130 PetriNetUnfolder]: For 9938/9938 co-relation queries the response was YES. [2022-07-12 10:10:48,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29439 conditions, 11815 events. 4859/11815 cut-off events. For 9938/9938 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 123251 event pairs, 1050 based on Foata normal form. 65/11505 useless extension candidates. Maximal degree in co-relation 29397. Up to 2287 conditions per place. [2022-07-12 10:10:48,437 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 166 selfloop transitions, 54 changer transitions 0/284 dead transitions. [2022-07-12 10:10:48,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 284 transitions, 1669 flow [2022-07-12 10:10:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:10:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:10:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2023 transitions. [2022-07-12 10:10:48,440 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8127762153475291 [2022-07-12 10:10:48,440 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2023 transitions. [2022-07-12 10:10:48,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2023 transitions. [2022-07-12 10:10:48,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:48,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2023 transitions. [2022-07-12 10:10:48,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 106.47368421052632) internal successors, (2023), 19 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:48,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 131.0) internal successors, (2620), 20 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:48,446 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 131.0) internal successors, (2620), 20 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:48,446 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 320 flow. Second operand 19 states and 2023 transitions. [2022-07-12 10:10:48,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 284 transitions, 1669 flow [2022-07-12 10:10:48,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 284 transitions, 1669 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:10:48,467 INFO L242 Difference]: Finished difference. Result has 137 places, 140 transitions, 794 flow [2022-07-12 10:10:48,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=794, PETRI_PLACES=137, PETRI_TRANSITIONS=140} [2022-07-12 10:10:48,467 INFO L279 CegarLoopForPetriNet]: 98 programPoint places, 39 predicate places. [2022-07-12 10:10:48,467 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 140 transitions, 794 flow [2022-07-12 10:10:48,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:48,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:48,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:48,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:10:48,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:10:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1933405436, now seen corresponding path program 1 times [2022-07-12 10:10:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983430685] [2022-07-12 10:10:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:48,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:10:48,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983430685] [2022-07-12 10:10:48,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983430685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:48,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:48,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:10:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934411173] [2022-07-12 10:10:48,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:48,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:10:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:10:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:10:48,504 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 131 [2022-07-12 10:10:48,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 140 transitions, 794 flow. Second operand has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:48,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:48,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 131 [2022-07-12 10:10:48,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:50,896 INFO L129 PetriNetUnfolder]: 7508/19212 cut-off events. [2022-07-12 10:10:50,897 INFO L130 PetriNetUnfolder]: For 62206/62206 co-relation queries the response was YES. [2022-07-12 10:10:51,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65870 conditions, 19212 events. 7508/19212 cut-off events. For 62206/62206 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 228346 event pairs, 1832 based on Foata normal form. 108/18764 useless extension candidates. Maximal degree in co-relation 65815. Up to 4037 conditions per place. [2022-07-12 10:10:51,426 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 226 selfloop transitions, 102 changer transitions 0/392 dead transitions. [2022-07-12 10:10:51,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 392 transitions, 3611 flow [2022-07-12 10:10:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:10:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:10:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2021 transitions. [2022-07-12 10:10:51,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8119726797910808 [2022-07-12 10:10:51,430 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2021 transitions. [2022-07-12 10:10:51,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2021 transitions. [2022-07-12 10:10:51,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:51,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2021 transitions. [2022-07-12 10:10:51,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 106.36842105263158) internal successors, (2021), 19 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:51,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 131.0) internal successors, (2620), 20 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:51,447 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 131.0) internal successors, (2620), 20 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:51,447 INFO L186 Difference]: Start difference. First operand has 137 places, 140 transitions, 794 flow. Second operand 19 states and 2021 transitions. [2022-07-12 10:10:51,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 392 transitions, 3611 flow [2022-07-12 10:10:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 392 transitions, 3286 flow, removed 136 selfloop flow, removed 3 redundant places. [2022-07-12 10:10:51,738 INFO L242 Difference]: Finished difference. Result has 163 places, 213 transitions, 1825 flow [2022-07-12 10:10:51,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1825, PETRI_PLACES=163, PETRI_TRANSITIONS=213} [2022-07-12 10:10:51,738 INFO L279 CegarLoopForPetriNet]: 98 programPoint places, 65 predicate places. [2022-07-12 10:10:51,739 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 213 transitions, 1825 flow [2022-07-12 10:10:51,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:51,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:51,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:51,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:10:51,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:10:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1164470650, now seen corresponding path program 1 times [2022-07-12 10:10:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:51,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11460996] [2022-07-12 10:10:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:51,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:10:51,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11460996] [2022-07-12 10:10:51,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11460996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:51,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:51,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 10:10:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370625595] [2022-07-12 10:10:51,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:51,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:10:51,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:10:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 10:10:51,787 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 131 [2022-07-12 10:10:51,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 213 transitions, 1825 flow. Second operand has 9 states, 9 states have (on average 95.66666666666667) internal successors, (861), 9 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:51,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:51,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 131 [2022-07-12 10:10:51,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:10:56,150 INFO L129 PetriNetUnfolder]: 9460/26062 cut-off events. [2022-07-12 10:10:56,151 INFO L130 PetriNetUnfolder]: For 155821/155821 co-relation queries the response was YES. [2022-07-12 10:10:56,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97483 conditions, 26062 events. 9460/26062 cut-off events. For 155821/155821 co-relation queries the response was YES. Maximal size of possible extension queue 1834. Compared 329171 event pairs, 1908 based on Foata normal form. 19/25137 useless extension candidates. Maximal degree in co-relation 97416. Up to 4102 conditions per place. [2022-07-12 10:10:56,641 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 345 selfloop transitions, 204 changer transitions 0/612 dead transitions. [2022-07-12 10:10:56,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 612 transitions, 6450 flow [2022-07-12 10:10:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:10:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:10:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4707 transitions. [2022-07-12 10:10:56,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7984732824427481 [2022-07-12 10:10:56,648 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4707 transitions. [2022-07-12 10:10:56,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4707 transitions. [2022-07-12 10:10:56,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:10:56,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4707 transitions. [2022-07-12 10:10:56,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 104.6) internal successors, (4707), 45 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:56,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 131.0) internal successors, (6026), 46 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:56,664 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 131.0) internal successors, (6026), 46 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:56,664 INFO L186 Difference]: Start difference. First operand has 163 places, 213 transitions, 1825 flow. Second operand 45 states and 4707 transitions. [2022-07-12 10:10:56,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 612 transitions, 6450 flow [2022-07-12 10:10:57,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 612 transitions, 6104 flow, removed 173 selfloop flow, removed 0 redundant places. [2022-07-12 10:10:57,802 INFO L242 Difference]: Finished difference. Result has 219 places, 300 transitions, 3326 flow [2022-07-12 10:10:57,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3326, PETRI_PLACES=219, PETRI_TRANSITIONS=300} [2022-07-12 10:10:57,803 INFO L279 CegarLoopForPetriNet]: 98 programPoint places, 121 predicate places. [2022-07-12 10:10:57,803 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 300 transitions, 3326 flow [2022-07-12 10:10:57,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 95.66666666666667) internal successors, (861), 9 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:57,804 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:10:57,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:10:57,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:10:57,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:10:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:10:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 797242042, now seen corresponding path program 2 times [2022-07-12 10:10:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:10:57,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666297528] [2022-07-12 10:10:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:10:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:10:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:10:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:10:57,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:10:57,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666297528] [2022-07-12 10:10:57,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666297528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:10:57,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:10:57,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 10:10:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306274913] [2022-07-12 10:10:57,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:10:57,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:10:57,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:10:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:10:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 10:10:57,852 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 131 [2022-07-12 10:10:57,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 300 transitions, 3326 flow. Second operand has 9 states, 9 states have (on average 95.66666666666667) internal successors, (861), 9 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:10:57,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:10:57,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 131 [2022-07-12 10:10:57,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:11:02,909 INFO L129 PetriNetUnfolder]: 9851/26613 cut-off events. [2022-07-12 10:11:02,909 INFO L130 PetriNetUnfolder]: For 244938/244938 co-relation queries the response was YES. [2022-07-12 10:11:03,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113823 conditions, 26613 events. 9851/26613 cut-off events. For 244938/244938 co-relation queries the response was YES. Maximal size of possible extension queue 1966. Compared 337914 event pairs, 1512 based on Foata normal form. 19/25889 useless extension candidates. Maximal degree in co-relation 113742. Up to 3803 conditions per place. [2022-07-12 10:11:03,618 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 366 selfloop transitions, 240 changer transitions 0/669 dead transitions. [2022-07-12 10:11:03,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 669 transitions, 8225 flow [2022-07-12 10:11:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:11:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:11:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4707 transitions. [2022-07-12 10:11:03,623 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7984732824427481 [2022-07-12 10:11:03,623 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4707 transitions. [2022-07-12 10:11:03,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4707 transitions. [2022-07-12 10:11:03,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:11:03,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4707 transitions. [2022-07-12 10:11:03,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 104.6) internal successors, (4707), 45 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:03,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 131.0) internal successors, (6026), 46 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:03,636 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 131.0) internal successors, (6026), 46 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:03,636 INFO L186 Difference]: Start difference. First operand has 219 places, 300 transitions, 3326 flow. Second operand 45 states and 4707 transitions. [2022-07-12 10:11:03,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 669 transitions, 8225 flow [2022-07-12 10:11:06,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 669 transitions, 7737 flow, removed 179 selfloop flow, removed 12 redundant places. [2022-07-12 10:11:06,051 INFO L242 Difference]: Finished difference. Result has 263 places, 355 transitions, 4479 flow [2022-07-12 10:11:06,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4479, PETRI_PLACES=263, PETRI_TRANSITIONS=355} [2022-07-12 10:11:06,052 INFO L279 CegarLoopForPetriNet]: 98 programPoint places, 165 predicate places. [2022-07-12 10:11:06,052 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 355 transitions, 4479 flow [2022-07-12 10:11:06,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 95.66666666666667) internal successors, (861), 9 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:06,052 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:11:06,053 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:11:06,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:11:06,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:11:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:11:06,054 INFO L85 PathProgramCache]: Analyzing trace with hash -701023176, now seen corresponding path program 1 times [2022-07-12 10:11:06,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:11:06,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704784410] [2022-07-12 10:11:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:11:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:11:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:11:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:11:06,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:11:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704784410] [2022-07-12 10:11:06,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704784410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:11:06,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:11:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:11:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527489569] [2022-07-12 10:11:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:11:06,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:11:06,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:11:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:11:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:11:06,127 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 131 [2022-07-12 10:11:06,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 355 transitions, 4479 flow. Second operand has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:06,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:11:06,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 131 [2022-07-12 10:11:06,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:11:12,012 INFO L129 PetriNetUnfolder]: 12295/32704 cut-off events. [2022-07-12 10:11:12,013 INFO L130 PetriNetUnfolder]: For 523354/523354 co-relation queries the response was YES. [2022-07-12 10:11:13,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178847 conditions, 32704 events. 12295/32704 cut-off events. For 523354/523354 co-relation queries the response was YES. Maximal size of possible extension queue 2728. Compared 436437 event pairs, 2567 based on Foata normal form. 201/32542 useless extension candidates. Maximal degree in co-relation 178754. Up to 5567 conditions per place. [2022-07-12 10:11:13,337 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 673 selfloop transitions, 317 changer transitions 0/1054 dead transitions. [2022-07-12 10:11:13,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1054 transitions, 17846 flow [2022-07-12 10:11:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:11:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:11:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2010 transitions. [2022-07-12 10:11:13,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8075532342306148 [2022-07-12 10:11:13,340 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2010 transitions. [2022-07-12 10:11:13,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2010 transitions. [2022-07-12 10:11:13,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:11:13,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2010 transitions. [2022-07-12 10:11:13,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 105.78947368421052) internal successors, (2010), 19 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:13,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 131.0) internal successors, (2620), 20 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:13,345 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 131.0) internal successors, (2620), 20 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:13,345 INFO L186 Difference]: Start difference. First operand has 263 places, 355 transitions, 4479 flow. Second operand 19 states and 2010 transitions. [2022-07-12 10:11:13,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1054 transitions, 17846 flow [2022-07-12 10:11:23,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1054 transitions, 16524 flow, removed 489 selfloop flow, removed 18 redundant places. [2022-07-12 10:11:23,086 INFO L242 Difference]: Finished difference. Result has 274 places, 605 transitions, 9755 flow [2022-07-12 10:11:23,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9755, PETRI_PLACES=274, PETRI_TRANSITIONS=605} [2022-07-12 10:11:23,087 INFO L279 CegarLoopForPetriNet]: 98 programPoint places, 176 predicate places. [2022-07-12 10:11:23,088 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 605 transitions, 9755 flow [2022-07-12 10:11:23,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:23,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:11:23,088 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:11:23,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:11:23,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:11:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:11:23,089 INFO L85 PathProgramCache]: Analyzing trace with hash -930440522, now seen corresponding path program 1 times [2022-07-12 10:11:23,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:11:23,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066096050] [2022-07-12 10:11:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:11:23,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:11:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:11:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:11:23,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:11:23,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066096050] [2022-07-12 10:11:23,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066096050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:11:23,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:11:23,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 10:11:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642303740] [2022-07-12 10:11:23,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:11:23,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:11:23,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:11:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:11:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 10:11:23,148 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 131 [2022-07-12 10:11:23,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 605 transitions, 9755 flow. Second operand has 9 states, 9 states have (on average 95.77777777777777) internal successors, (862), 9 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:11:23,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:11:23,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 131 [2022-07-12 10:11:23,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand