./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-nondet/nondet-array-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-nondet/nondet-array-2.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 2796c466e7d8363340777400f1e90c0fc7eb53096f49ded0fb8aa6814bf1ef21 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:26:25,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:26:25,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:26:25,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:26:25,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:26:25,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:26:25,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:26:25,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:26:25,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:26:25,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:26:25,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:26:25,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:26:25,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:26:25,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:26:25,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:26:25,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:26:25,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:26:25,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:26:25,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:26:25,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:26:25,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:26:25,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:26:25,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:26:25,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:26:25,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:26:25,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:26:25,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:26:25,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:26:25,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:26:25,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:26:25,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:26:25,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:26:25,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:26:25,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:26:25,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:26:25,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:26:25,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:26:25,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:26:25,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:26:25,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:26:25,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:26:25,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:26:25,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:26:25,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:26:25,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:26:25,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:26:25,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:26:25,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:26:25,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:26:25,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:26:25,325 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:26:25,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:26:25,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:26:25,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:26:25,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:26:25,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:26:25,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:26:25,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:26:25,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:26:25,327 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:26:25,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:26:25,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:26:25,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:26:25,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:26:25,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:26:25,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:26:25,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:26:25,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:26:25,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:26:25,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:26:25,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:26:25,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:26:25,329 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:26:25,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:26:25,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:26:25,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:26:25,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2796c466e7d8363340777400f1e90c0fc7eb53096f49ded0fb8aa6814bf1ef21 [2021-12-17 22:26:25,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:26:25,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:26:25,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:26:25,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:26:25,517 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:26:25,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-nondet/nondet-array-2.i [2021-12-17 22:26:25,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0af2fb8d1/70c9272836d74e748d2f005668ba033b/FLAGa25beeeb2 [2021-12-17 22:26:25,887 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:26:25,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-array-2.i [2021-12-17 22:26:25,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0af2fb8d1/70c9272836d74e748d2f005668ba033b/FLAGa25beeeb2 [2021-12-17 22:26:26,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0af2fb8d1/70c9272836d74e748d2f005668ba033b [2021-12-17 22:26:26,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:26:26,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:26:26,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:26:26,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:26:26,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:26:26,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7e1187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26, skipping insertion in model container [2021-12-17 22:26:26,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:26:26,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:26:26,538 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-nondet/nondet-array-2.i[30035,30048] [2021-12-17 22:26:26,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:26:26,570 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:26:26,596 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-nondet/nondet-array-2.i[30035,30048] [2021-12-17 22:26:26,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:26:26,621 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:26:26,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26 WrapperNode [2021-12-17 22:26:26,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:26:26,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:26:26,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:26:26,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:26:26,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,652 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-17 22:26:26,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:26:26,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:26:26,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:26:26,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:26:26,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:26:26,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:26:26,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:26:26,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:26:26,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (1/1) ... [2021-12-17 22:26:26,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:26:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:26:26,701 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) [2021-12-17 22:26:26,709 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 [2021-12-17 22:26:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-17 22:26:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:26:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:26:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2021-12-17 22:26:26,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2021-12-17 22:26:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:26:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:26:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:26:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:26:26,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:26:26,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:26:26,735 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:26:26,835 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:26:26,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:26:26,963 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:26:26,971 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:26:26,971 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 22:26:26,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:26:26 BoogieIcfgContainer [2021-12-17 22:26:26,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:26:26,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:26:26,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:26:26,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:26:26,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:26:26" (1/3) ... [2021-12-17 22:26:26,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1684342c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:26:26, skipping insertion in model container [2021-12-17 22:26:26,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:26:26" (2/3) ... [2021-12-17 22:26:26,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1684342c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:26:26, skipping insertion in model container [2021-12-17 22:26:26,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:26:26" (3/3) ... [2021-12-17 22:26:26,980 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-2.i [2021-12-17 22:26:26,985 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:26:26,985 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:26:26,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:26:26,985 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:26:27,006 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,006 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,006 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,007 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,007 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,007 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,007 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,007 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,008 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,008 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,008 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,008 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,008 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,008 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,011 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,011 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,011 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,011 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,011 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,024 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-12-17 22:26:27,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:26:27,097 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:26:27,097 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 22:26:27,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 88 transitions, 184 flow [2021-12-17 22:26:27,162 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2021-12-17 22:26:27,163 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-17 22:26:27,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 12/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 225 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2021-12-17 22:26:27,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 88 transitions, 184 flow [2021-12-17 22:26:27,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 164 flow [2021-12-17 22:26:27,190 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-17 22:26:27,190 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:26:27,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:27,191 INFO L254 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] [2021-12-17 22:26:27,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash -744396743, now seen corresponding path program 1 times [2021-12-17 22:26:27,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:27,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714310283] [2021-12-17 22:26:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:27,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:27,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:27,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714310283] [2021-12-17 22:26:27,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714310283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:27,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:27,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:26:27,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165214744] [2021-12-17 22:26:27,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:27,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:26:27,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:26:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:26:27,421 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 88 [2021-12-17 22:26:27,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2021-12-17 22:26:27,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:27,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 88 [2021-12-17 22:26:27,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:27,461 INFO L129 PetriNetUnfolder]: 3/99 cut-off events. [2021-12-17 22:26:27,461 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-17 22:26:27,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 3/99 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2021-12-17 22:26:27,463 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 2 selfloop transitions, 0 changer transitions 1/74 dead transitions. [2021-12-17 22:26:27,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 160 flow [2021-12-17 22:26:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:26:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:26:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-12-17 22:26:27,472 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9431818181818182 [2021-12-17 22:26:27,473 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-12-17 22:26:27,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-12-17 22:26:27,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:27,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-12-17 22:26:27,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 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) [2021-12-17 22:26:27,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2021-12-17 22:26:27,490 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2021-12-17 22:26:27,491 INFO L186 Difference]: Start difference. First operand has 75 places, 78 transitions, 164 flow. Second operand 2 states and 166 transitions. [2021-12-17 22:26:27,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 160 flow [2021-12-17 22:26:27,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:27,499 INFO L242 Difference]: Finished difference. Result has 76 places, 73 transitions, 154 flow [2021-12-17 22:26:27,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=154, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2021-12-17 22:26:27,507 INFO L334 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2021-12-17 22:26:27,507 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 154 flow [2021-12-17 22:26:27,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2021-12-17 22:26:27,508 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:27,509 INFO L254 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] [2021-12-17 22:26:27,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:26:27,511 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -53406567, now seen corresponding path program 1 times [2021-12-17 22:26:27,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:27,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406186022] [2021-12-17 22:26:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:27,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:27,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406186022] [2021-12-17 22:26:27,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406186022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:27,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:27,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:27,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232530258] [2021-12-17 22:26:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:27,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:27,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:27,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2021-12-17 22:26:27,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 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) [2021-12-17 22:26:27,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:27,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2021-12-17 22:26:27,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:27,672 INFO L129 PetriNetUnfolder]: 3/114 cut-off events. [2021-12-17 22:26:27,672 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-17 22:26:27,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 114 events. 3/114 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 141. Up to 16 conditions per place. [2021-12-17 22:26:27,672 INFO L132 encePairwiseOnDemand]: 83/88 looper letters, 8 selfloop transitions, 2 changer transitions 3/77 dead transitions. [2021-12-17 22:26:27,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 188 flow [2021-12-17 22:26:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:26:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:26:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 374 transitions. [2021-12-17 22:26:27,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-12-17 22:26:27,678 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 374 transitions. [2021-12-17 22:26:27,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 374 transitions. [2021-12-17 22:26:27,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:27,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 374 transitions. [2021-12-17 22:26:27,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 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) [2021-12-17 22:26:27,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 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) [2021-12-17 22:26:27,683 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 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) [2021-12-17 22:26:27,683 INFO L186 Difference]: Start difference. First operand has 76 places, 73 transitions, 154 flow. Second operand 5 states and 374 transitions. [2021-12-17 22:26:27,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 188 flow [2021-12-17 22:26:27,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:27,686 INFO L242 Difference]: Finished difference. Result has 82 places, 74 transitions, 170 flow [2021-12-17 22:26:27,687 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2021-12-17 22:26:27,687 INFO L334 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2021-12-17 22:26:27,688 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 170 flow [2021-12-17 22:26:27,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 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) [2021-12-17 22:26:27,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:27,688 INFO L254 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] [2021-12-17 22:26:27,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:26:27,689 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash -658806082, now seen corresponding path program 1 times [2021-12-17 22:26:27,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:27,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320593406] [2021-12-17 22:26:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:27,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:27,721 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 22:26:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:27,755 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 22:26:27,758 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 22:26:27,758 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-17 22:26:27,760 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 22:26:27,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:26:27,763 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-17 22:26:27,764 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-17 22:26:27,764 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-12-17 22:26:27,770 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,771 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,771 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,771 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,771 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,771 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,771 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,771 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,772 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,772 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,772 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,772 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,772 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,772 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,773 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,773 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,773 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,773 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,773 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,773 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,773 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,774 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,774 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,774 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,774 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,774 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,775 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,775 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,775 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,776 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,776 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,776 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,777 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,778 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,778 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,779 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,779 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,779 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:27,780 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 22:26:27,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:26:27,786 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:26:27,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 22:26:27,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 208 flow [2021-12-17 22:26:27,810 INFO L129 PetriNetUnfolder]: 23/217 cut-off events. [2021-12-17 22:26:27,811 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-17 22:26:27,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 217 events. 23/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 512 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 128. Up to 8 conditions per place. [2021-12-17 22:26:27,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 95 transitions, 208 flow [2021-12-17 22:26:27,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 188 flow [2021-12-17 22:26:27,822 INFO L129 PetriNetUnfolder]: 7/76 cut-off events. [2021-12-17 22:26:27,822 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:26:27,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:27,823 INFO L254 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] [2021-12-17 22:26:27,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash 477382265, now seen corresponding path program 1 times [2021-12-17 22:26:27,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:27,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316901562] [2021-12-17 22:26:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:27,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:27,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316901562] [2021-12-17 22:26:27,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316901562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:27,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:27,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:26:27,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28982139] [2021-12-17 22:26:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:27,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:26:27,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:26:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:26:27,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 95 [2021-12-17 22:26:27,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 188 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-12-17 22:26:27,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:27,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 95 [2021-12-17 22:26:27,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:27,878 INFO L129 PetriNetUnfolder]: 7/165 cut-off events. [2021-12-17 22:26:27,879 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-12-17 22:26:27,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 165 events. 7/165 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 344 event pairs, 0 based on Foata normal form. 12/165 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2021-12-17 22:26:27,880 INFO L132 encePairwiseOnDemand]: 91/95 looper letters, 4 selfloop transitions, 0 changer transitions 1/81 dead transitions. [2021-12-17 22:26:27,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 188 flow [2021-12-17 22:26:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:26:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:26:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 178 transitions. [2021-12-17 22:26:27,881 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9368421052631579 [2021-12-17 22:26:27,881 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 178 transitions. [2021-12-17 22:26:27,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 178 transitions. [2021-12-17 22:26:27,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:27,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 178 transitions. [2021-12-17 22:26:27,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 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) [2021-12-17 22:26:27,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2021-12-17 22:26:27,886 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2021-12-17 22:26:27,886 INFO L186 Difference]: Start difference. First operand has 83 places, 85 transitions, 188 flow. Second operand 2 states and 178 transitions. [2021-12-17 22:26:27,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 188 flow [2021-12-17 22:26:27,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:27,888 INFO L242 Difference]: Finished difference. Result has 84 places, 80 transitions, 178 flow [2021-12-17 22:26:27,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2021-12-17 22:26:27,889 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2021-12-17 22:26:27,889 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 178 flow [2021-12-17 22:26:27,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-12-17 22:26:27,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:27,890 INFO L254 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] [2021-12-17 22:26:27,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:26:27,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash 280868760, now seen corresponding path program 1 times [2021-12-17 22:26:27,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942467935] [2021-12-17 22:26:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:27,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:27,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:27,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942467935] [2021-12-17 22:26:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942467935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:27,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:27,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:27,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570195736] [2021-12-17 22:26:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:27,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:27,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:27,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2021-12-17 22:26:27,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 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) [2021-12-17 22:26:27,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:27,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2021-12-17 22:26:27,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:28,021 INFO L129 PetriNetUnfolder]: 7/196 cut-off events. [2021-12-17 22:26:28,022 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-12-17 22:26:28,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 196 events. 7/196 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 462 event pairs, 0 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 254. Up to 32 conditions per place. [2021-12-17 22:26:28,023 INFO L132 encePairwiseOnDemand]: 90/95 looper letters, 10 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2021-12-17 22:26:28,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 216 flow [2021-12-17 22:26:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:26:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:26:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 401 transitions. [2021-12-17 22:26:28,026 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442105263157895 [2021-12-17 22:26:28,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 401 transitions. [2021-12-17 22:26:28,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 401 transitions. [2021-12-17 22:26:28,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:28,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 401 transitions. [2021-12-17 22:26:28,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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) [2021-12-17 22:26:28,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 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) [2021-12-17 22:26:28,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 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) [2021-12-17 22:26:28,030 INFO L186 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 5 states and 401 transitions. [2021-12-17 22:26:28,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 216 flow [2021-12-17 22:26:28,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:28,035 INFO L242 Difference]: Finished difference. Result has 90 places, 81 transitions, 194 flow [2021-12-17 22:26:28,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2021-12-17 22:26:28,036 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2021-12-17 22:26:28,036 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 194 flow [2021-12-17 22:26:28,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 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) [2021-12-17 22:26:28,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,037 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:26:28,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:26:28,037 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash -123182927, now seen corresponding path program 1 times [2021-12-17 22:26:28,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577803829] [2021-12-17 22:26:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:28,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:28,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577803829] [2021-12-17 22:26:28,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577803829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:28,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:28,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:28,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246964637] [2021-12-17 22:26:28,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:28,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:28,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:28,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:28,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:28,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 95 [2021-12-17 22:26:28,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 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) [2021-12-17 22:26:28,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:28,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 95 [2021-12-17 22:26:28,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:28,204 INFO L129 PetriNetUnfolder]: 7/190 cut-off events. [2021-12-17 22:26:28,204 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-17 22:26:28,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 190 events. 7/190 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 409 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 317. Up to 49 conditions per place. [2021-12-17 22:26:28,206 INFO L132 encePairwiseOnDemand]: 84/95 looper letters, 34 selfloop transitions, 6 changer transitions 7/102 dead transitions. [2021-12-17 22:26:28,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 336 flow [2021-12-17 22:26:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:26:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:26:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 301 transitions. [2021-12-17 22:26:28,207 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7921052631578948 [2021-12-17 22:26:28,208 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 301 transitions. [2021-12-17 22:26:28,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 301 transitions. [2021-12-17 22:26:28,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:28,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 301 transitions. [2021-12-17 22:26:28,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 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) [2021-12-17 22:26:28,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2021-12-17 22:26:28,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2021-12-17 22:26:28,212 INFO L186 Difference]: Start difference. First operand has 90 places, 81 transitions, 194 flow. Second operand 4 states and 301 transitions. [2021-12-17 22:26:28,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 336 flow [2021-12-17 22:26:28,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 330 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 22:26:28,216 INFO L242 Difference]: Finished difference. Result has 90 places, 84 transitions, 228 flow [2021-12-17 22:26:28,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2021-12-17 22:26:28,222 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2021-12-17 22:26:28,223 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 228 flow [2021-12-17 22:26:28,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 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) [2021-12-17 22:26:28,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,223 INFO L254 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] [2021-12-17 22:26:28,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 22:26:28,224 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 618023769, now seen corresponding path program 1 times [2021-12-17 22:26:28,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160629446] [2021-12-17 22:26:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:28,260 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 22:26:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:28,280 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 22:26:28,281 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 22:26:28,281 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-17 22:26:28,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 22:26:28,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 22:26:28,282 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-17 22:26:28,282 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-17 22:26:28,282 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,291 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,292 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,292 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,292 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,292 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,292 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,292 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,292 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,294 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,294 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,302 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,302 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,302 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,302 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,302 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,302 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,302 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,303 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,303 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,303 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,303 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,303 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,303 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,304 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,304 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,304 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,304 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,304 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,304 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,305 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,305 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,305 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,305 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,305 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,305 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,305 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,307 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,308 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-17 22:26:28,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:26:28,315 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:26:28,315 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 22:26:28,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 234 flow [2021-12-17 22:26:28,335 INFO L129 PetriNetUnfolder]: 45/383 cut-off events. [2021-12-17 22:26:28,335 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-12-17 22:26:28,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 45/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1193 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 225. Up to 16 conditions per place. [2021-12-17 22:26:28,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 102 transitions, 234 flow [2021-12-17 22:26:28,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 92 transitions, 214 flow [2021-12-17 22:26:28,342 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-17 22:26:28,342 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:26:28,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,342 INFO L254 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] [2021-12-17 22:26:28,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash -783703138, now seen corresponding path program 1 times [2021-12-17 22:26:28,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33852296] [2021-12-17 22:26:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:28,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:28,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33852296] [2021-12-17 22:26:28,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33852296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:28,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:28,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:26:28,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36488174] [2021-12-17 22:26:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:26:28,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:26:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:26:28,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 102 [2021-12-17 22:26:28,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 214 flow. Second operand has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 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) [2021-12-17 22:26:28,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:28,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 102 [2021-12-17 22:26:28,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:28,418 INFO L129 PetriNetUnfolder]: 16/282 cut-off events. [2021-12-17 22:26:28,419 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2021-12-17 22:26:28,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 282 events. 16/282 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 769 event pairs, 1 based on Foata normal form. 21/282 useless extension candidates. Maximal degree in co-relation 179. Up to 16 conditions per place. [2021-12-17 22:26:28,420 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 6 selfloop transitions, 0 changer transitions 1/88 dead transitions. [2021-12-17 22:26:28,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 218 flow [2021-12-17 22:26:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:26:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:26:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2021-12-17 22:26:28,421 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9313725490196079 [2021-12-17 22:26:28,421 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2021-12-17 22:26:28,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2021-12-17 22:26:28,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:28,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2021-12-17 22:26:28,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 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) [2021-12-17 22:26:28,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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) [2021-12-17 22:26:28,423 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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) [2021-12-17 22:26:28,424 INFO L186 Difference]: Start difference. First operand has 91 places, 92 transitions, 214 flow. Second operand 2 states and 190 transitions. [2021-12-17 22:26:28,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 218 flow [2021-12-17 22:26:28,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:28,425 INFO L242 Difference]: Finished difference. Result has 92 places, 87 transitions, 204 flow [2021-12-17 22:26:28,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2021-12-17 22:26:28,427 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2021-12-17 22:26:28,427 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 204 flow [2021-12-17 22:26:28,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 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) [2021-12-17 22:26:28,428 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,428 INFO L254 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] [2021-12-17 22:26:28,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 22:26:28,428 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 232883262, now seen corresponding path program 1 times [2021-12-17 22:26:28,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250271555] [2021-12-17 22:26:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:28,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250271555] [2021-12-17 22:26:28,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250271555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:28,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:28,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:28,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22569592] [2021-12-17 22:26:28,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:28,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:28,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:28,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:28,482 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-17 22:26:28,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 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) [2021-12-17 22:26:28,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:28,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-17 22:26:28,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:28,537 INFO L129 PetriNetUnfolder]: 16/345 cut-off events. [2021-12-17 22:26:28,537 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2021-12-17 22:26:28,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 345 events. 16/345 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1116 event pairs, 1 based on Foata normal form. 8/325 useless extension candidates. Maximal degree in co-relation 465. Up to 65 conditions per place. [2021-12-17 22:26:28,539 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 12 selfloop transitions, 2 changer transitions 3/91 dead transitions. [2021-12-17 22:26:28,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 246 flow [2021-12-17 22:26:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:26:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:26:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 428 transitions. [2021-12-17 22:26:28,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8392156862745098 [2021-12-17 22:26:28,541 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 428 transitions. [2021-12-17 22:26:28,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 428 transitions. [2021-12-17 22:26:28,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:28,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 428 transitions. [2021-12-17 22:26:28,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 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) [2021-12-17 22:26:28,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 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) [2021-12-17 22:26:28,543 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 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) [2021-12-17 22:26:28,543 INFO L186 Difference]: Start difference. First operand has 92 places, 87 transitions, 204 flow. Second operand 5 states and 428 transitions. [2021-12-17 22:26:28,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 246 flow [2021-12-17 22:26:28,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:28,546 INFO L242 Difference]: Finished difference. Result has 98 places, 88 transitions, 220 flow [2021-12-17 22:26:28,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2021-12-17 22:26:28,547 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2021-12-17 22:26:28,547 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 220 flow [2021-12-17 22:26:28,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 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) [2021-12-17 22:26:28,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,547 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:26:28,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 22:26:28,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 293691249, now seen corresponding path program 1 times [2021-12-17 22:26:28,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000940173] [2021-12-17 22:26:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:28,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000940173] [2021-12-17 22:26:28,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000940173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:28,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:28,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:28,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590050905] [2021-12-17 22:26:28,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:28,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:28,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:28,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:28,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:28,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 102 [2021-12-17 22:26:28,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 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) [2021-12-17 22:26:28,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:28,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 102 [2021-12-17 22:26:28,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:28,648 INFO L129 PetriNetUnfolder]: 18/353 cut-off events. [2021-12-17 22:26:28,648 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2021-12-17 22:26:28,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 353 events. 18/353 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1275 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 614. Up to 107 conditions per place. [2021-12-17 22:26:28,650 INFO L132 encePairwiseOnDemand]: 91/102 looper letters, 37 selfloop transitions, 6 changer transitions 7/110 dead transitions. [2021-12-17 22:26:28,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 373 flow [2021-12-17 22:26:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:26:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:26:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2021-12-17 22:26:28,652 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2021-12-17 22:26:28,652 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2021-12-17 22:26:28,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2021-12-17 22:26:28,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:28,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2021-12-17 22:26:28,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2021-12-17 22:26:28,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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) [2021-12-17 22:26:28,654 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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) [2021-12-17 22:26:28,654 INFO L186 Difference]: Start difference. First operand has 98 places, 88 transitions, 220 flow. Second operand 4 states and 324 transitions. [2021-12-17 22:26:28,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 373 flow [2021-12-17 22:26:28,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 367 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 22:26:28,658 INFO L242 Difference]: Finished difference. Result has 98 places, 91 transitions, 254 flow [2021-12-17 22:26:28,658 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2021-12-17 22:26:28,660 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2021-12-17 22:26:28,660 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 254 flow [2021-12-17 22:26:28,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 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) [2021-12-17 22:26:28,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,660 INFO L254 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, 1, 1, 1, 1] [2021-12-17 22:26:28,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 22:26:28,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1470109151, now seen corresponding path program 1 times [2021-12-17 22:26:28,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70591641] [2021-12-17 22:26:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:28,686 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 22:26:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:28,721 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 22:26:28,721 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 22:26:28,721 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-17 22:26:28,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 22:26:28,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 22:26:28,722 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-17 22:26:28,722 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-17 22:26:28,722 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-12-17 22:26:28,730 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,731 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,732 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,732 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,732 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,732 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,732 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,732 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,732 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,733 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,733 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,733 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,733 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,733 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,733 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,733 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,734 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,735 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,735 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,735 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,735 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,735 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,735 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,736 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,736 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,736 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,736 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,736 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,736 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,738 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,738 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,738 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,738 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,738 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,738 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,739 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,739 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,739 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,739 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,740 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,740 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,740 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,740 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,741 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,741 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,741 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,741 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,741 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,742 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,742 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,742 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,742 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,743 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:28,744 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-17 22:26:28,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:26:28,746 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:26:28,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 22:26:28,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 108 places, 109 transitions, 262 flow [2021-12-17 22:26:28,793 INFO L129 PetriNetUnfolder]: 91/701 cut-off events. [2021-12-17 22:26:28,794 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-12-17 22:26:28,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 91/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3012 event pairs, 6 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2021-12-17 22:26:28,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 109 transitions, 262 flow [2021-12-17 22:26:28,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 242 flow [2021-12-17 22:26:28,800 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-17 22:26:28,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:26:28,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,800 INFO L254 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] [2021-12-17 22:26:28,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -888353237, now seen corresponding path program 1 times [2021-12-17 22:26:28,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288477821] [2021-12-17 22:26:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:28,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:28,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288477821] [2021-12-17 22:26:28,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288477821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:28,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:28,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:26:28,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673088186] [2021-12-17 22:26:28,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:28,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:26:28,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:26:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:26:28,821 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 109 [2021-12-17 22:26:28,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 242 flow. Second operand has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 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) [2021-12-17 22:26:28,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:28,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 109 [2021-12-17 22:26:28,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:28,862 INFO L129 PetriNetUnfolder]: 37/503 cut-off events. [2021-12-17 22:26:28,863 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-12-17 22:26:28,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 503 events. 37/503 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2010 event pairs, 6 based on Foata normal form. 38/503 useless extension candidates. Maximal degree in co-relation 317. Up to 37 conditions per place. [2021-12-17 22:26:28,866 INFO L132 encePairwiseOnDemand]: 105/109 looper letters, 8 selfloop transitions, 0 changer transitions 1/95 dead transitions. [2021-12-17 22:26:28,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 95 transitions, 250 flow [2021-12-17 22:26:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:26:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:26:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2021-12-17 22:26:28,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926605504587156 [2021-12-17 22:26:28,867 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2021-12-17 22:26:28,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2021-12-17 22:26:28,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:28,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2021-12-17 22:26:28,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 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) [2021-12-17 22:26:28,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2021-12-17 22:26:28,868 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2021-12-17 22:26:28,868 INFO L186 Difference]: Start difference. First operand has 99 places, 99 transitions, 242 flow. Second operand 2 states and 202 transitions. [2021-12-17 22:26:28,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 95 transitions, 250 flow [2021-12-17 22:26:28,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 95 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:28,870 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 232 flow [2021-12-17 22:26:28,870 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2021-12-17 22:26:28,871 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2021-12-17 22:26:28,872 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 232 flow [2021-12-17 22:26:28,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 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) [2021-12-17 22:26:28,872 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:28,872 INFO L254 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] [2021-12-17 22:26:28,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 22:26:28,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:28,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -197363061, now seen corresponding path program 1 times [2021-12-17 22:26:28,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:28,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668066892] [2021-12-17 22:26:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:28,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:28,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:28,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668066892] [2021-12-17 22:26:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668066892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:28,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:28,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:28,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011240743] [2021-12-17 22:26:28,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:28,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:28,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:28,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 109 [2021-12-17 22:26:28,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 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) [2021-12-17 22:26:28,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:28,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 109 [2021-12-17 22:26:28,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:29,008 INFO L129 PetriNetUnfolder]: 37/630 cut-off events. [2021-12-17 22:26:29,009 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-12-17 22:26:29,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 630 events. 37/630 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2856 event pairs, 6 based on Foata normal form. 16/593 useless extension candidates. Maximal degree in co-relation 877. Up to 134 conditions per place. [2021-12-17 22:26:29,012 INFO L132 encePairwiseOnDemand]: 104/109 looper letters, 14 selfloop transitions, 2 changer transitions 3/98 dead transitions. [2021-12-17 22:26:29,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 278 flow [2021-12-17 22:26:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:26:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:26:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 455 transitions. [2021-12-17 22:26:29,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8348623853211009 [2021-12-17 22:26:29,014 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 455 transitions. [2021-12-17 22:26:29,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 455 transitions. [2021-12-17 22:26:29,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:29,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 455 transitions. [2021-12-17 22:26:29,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 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) [2021-12-17 22:26:29,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 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) [2021-12-17 22:26:29,017 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 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) [2021-12-17 22:26:29,017 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 232 flow. Second operand 5 states and 455 transitions. [2021-12-17 22:26:29,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 278 flow [2021-12-17 22:26:29,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 98 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:29,019 INFO L242 Difference]: Finished difference. Result has 106 places, 95 transitions, 248 flow [2021-12-17 22:26:29,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2021-12-17 22:26:29,021 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2021-12-17 22:26:29,021 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 248 flow [2021-12-17 22:26:29,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 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) [2021-12-17 22:26:29,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:29,021 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:26:29,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 22:26:29,021 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash 402314257, now seen corresponding path program 1 times [2021-12-17 22:26:29,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:29,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226495160] [2021-12-17 22:26:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:29,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:29,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:29,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226495160] [2021-12-17 22:26:29,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226495160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:29,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:29,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:29,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106097327] [2021-12-17 22:26:29,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:29,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:29,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:29,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:29,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:29,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 109 [2021-12-17 22:26:29,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 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) [2021-12-17 22:26:29,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:29,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 109 [2021-12-17 22:26:29,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:29,175 INFO L129 PetriNetUnfolder]: 42/656 cut-off events. [2021-12-17 22:26:29,175 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-12-17 22:26:29,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 656 events. 42/656 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3214 event pairs, 1 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 1172. Up to 222 conditions per place. [2021-12-17 22:26:29,177 INFO L132 encePairwiseOnDemand]: 98/109 looper letters, 40 selfloop transitions, 6 changer transitions 7/118 dead transitions. [2021-12-17 22:26:29,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 118 transitions, 412 flow [2021-12-17 22:26:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:26:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:26:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2021-12-17 22:26:29,179 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7958715596330275 [2021-12-17 22:26:29,179 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2021-12-17 22:26:29,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2021-12-17 22:26:29,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:29,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2021-12-17 22:26:29,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 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) [2021-12-17 22:26:29,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 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) [2021-12-17 22:26:29,181 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 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) [2021-12-17 22:26:29,181 INFO L186 Difference]: Start difference. First operand has 106 places, 95 transitions, 248 flow. Second operand 4 states and 347 transitions. [2021-12-17 22:26:29,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 118 transitions, 412 flow [2021-12-17 22:26:29,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 406 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 22:26:29,183 INFO L242 Difference]: Finished difference. Result has 106 places, 98 transitions, 282 flow [2021-12-17 22:26:29,183 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2021-12-17 22:26:29,184 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2021-12-17 22:26:29,184 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 282 flow [2021-12-17 22:26:29,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 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) [2021-12-17 22:26:29,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:29,184 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:26:29,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 22:26:29,185 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1092255810, now seen corresponding path program 1 times [2021-12-17 22:26:29,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122109044] [2021-12-17 22:26:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:29,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:26:29,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:29,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122109044] [2021-12-17 22:26:29,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122109044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:26:29,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547524628] [2021-12-17 22:26:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:29,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:26:29,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:26:29,288 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) [2021-12-17 22:26:29,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 22:26:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:29,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 22:26:29,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:26:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:26:29,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:26:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:26:29,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547524628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:26:29,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:26:29,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2021-12-17 22:26:29,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850351356] [2021-12-17 22:26:29,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:26:29,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 22:26:29,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:29,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 22:26:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-17 22:26:29,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 109 [2021-12-17 22:26:29,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 282 flow. Second operand has 24 states, 24 states have (on average 45.958333333333336) internal successors, (1103), 24 states have internal predecessors, (1103), 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) [2021-12-17 22:26:29,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:29,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 109 [2021-12-17 22:26:29,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:39,952 INFO L129 PetriNetUnfolder]: 62875/102731 cut-off events. [2021-12-17 22:26:39,953 INFO L130 PetriNetUnfolder]: For 11793/11793 co-relation queries the response was YES. [2021-12-17 22:26:40,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215977 conditions, 102731 events. 62875/102731 cut-off events. For 11793/11793 co-relation queries the response was YES. Maximal size of possible extension queue 2017. Compared 877325 event pairs, 6202 based on Foata normal form. 278/102765 useless extension candidates. Maximal degree in co-relation 215966. Up to 10176 conditions per place. [2021-12-17 22:26:40,685 INFO L132 encePairwiseOnDemand]: 80/109 looper letters, 459 selfloop transitions, 164 changer transitions 24/682 dead transitions. [2021-12-17 22:26:40,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 682 transitions, 3054 flow [2021-12-17 22:26:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 22:26:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-17 22:26:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3220 transitions. [2021-12-17 22:26:40,692 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48428335087983154 [2021-12-17 22:26:40,692 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3220 transitions. [2021-12-17 22:26:40,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3220 transitions. [2021-12-17 22:26:40,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:40,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3220 transitions. [2021-12-17 22:26:40,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 52.78688524590164) internal successors, (3220), 61 states have internal predecessors, (3220), 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) [2021-12-17 22:26:40,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 109.0) internal successors, (6758), 62 states have internal predecessors, (6758), 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) [2021-12-17 22:26:40,710 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 109.0) internal successors, (6758), 62 states have internal predecessors, (6758), 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) [2021-12-17 22:26:40,710 INFO L186 Difference]: Start difference. First operand has 106 places, 98 transitions, 282 flow. Second operand 61 states and 3220 transitions. [2021-12-17 22:26:40,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 682 transitions, 3054 flow [2021-12-17 22:26:40,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 682 transitions, 2990 flow, removed 21 selfloop flow, removed 2 redundant places. [2021-12-17 22:26:40,921 INFO L242 Difference]: Finished difference. Result has 197 places, 264 transitions, 1453 flow [2021-12-17 22:26:40,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1453, PETRI_PLACES=197, PETRI_TRANSITIONS=264} [2021-12-17 22:26:40,922 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 98 predicate places. [2021-12-17 22:26:40,922 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 264 transitions, 1453 flow [2021-12-17 22:26:40,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 45.958333333333336) internal successors, (1103), 24 states have internal predecessors, (1103), 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) [2021-12-17 22:26:40,923 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:40,923 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:26:40,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 22:26:41,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 22:26:41,124 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1090444432, now seen corresponding path program 1 times [2021-12-17 22:26:41,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:41,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289224826] [2021-12-17 22:26:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:41,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:41,140 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 22:26:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:26:41,154 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 22:26:41,156 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 22:26:41,156 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-17 22:26:41,157 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 22:26:41,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 22:26:41,157 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-17 22:26:41,158 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-17 22:26:41,158 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-12-17 22:26:41,167 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,167 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,167 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,167 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,167 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,167 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,167 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,168 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,168 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,168 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,168 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,168 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,169 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,170 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,171 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,172 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,173 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,174 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,174 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,174 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,174 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,174 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,174 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,174 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,175 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,176 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,176 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,176 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,176 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,176 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,176 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,177 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,177 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,177 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,177 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,177 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,177 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,177 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,178 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,178 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,178 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,178 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,178 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,178 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,178 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,179 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,179 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,179 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,179 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,179 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:26:41,180 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-12-17 22:26:41,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:26:41,182 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:26:41,182 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 22:26:41,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 116 transitions, 292 flow [2021-12-17 22:26:41,251 INFO L129 PetriNetUnfolder]: 189/1327 cut-off events. [2021-12-17 22:26:41,251 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-12-17 22:26:41,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1438 conditions, 1327 events. 189/1327 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7613 event pairs, 23 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 746. Up to 80 conditions per place. [2021-12-17 22:26:41,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 116 transitions, 292 flow [2021-12-17 22:26:41,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 106 transitions, 272 flow [2021-12-17 22:26:41,265 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-17 22:26:41,265 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:26:41,265 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:41,265 INFO L254 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] [2021-12-17 22:26:41,265 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1138952928, now seen corresponding path program 1 times [2021-12-17 22:26:41,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:41,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025024706] [2021-12-17 22:26:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:41,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:41,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:41,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025024706] [2021-12-17 22:26:41,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025024706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:41,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:41,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:26:41,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299145343] [2021-12-17 22:26:41,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:41,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:26:41,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:26:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:26:41,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 116 [2021-12-17 22:26:41,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 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) [2021-12-17 22:26:41,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:41,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 116 [2021-12-17 22:26:41,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:41,460 INFO L129 PetriNetUnfolder]: 86/936 cut-off events. [2021-12-17 22:26:41,460 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2021-12-17 22:26:41,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 936 events. 86/936 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4964 event pairs, 23 based on Foata normal form. 71/936 useless extension candidates. Maximal degree in co-relation 584. Up to 86 conditions per place. [2021-12-17 22:26:41,464 INFO L132 encePairwiseOnDemand]: 112/116 looper letters, 10 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2021-12-17 22:26:41,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 102 transitions, 284 flow [2021-12-17 22:26:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:26:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:26:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 214 transitions. [2021-12-17 22:26:41,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9224137931034483 [2021-12-17 22:26:41,465 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 214 transitions. [2021-12-17 22:26:41,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 214 transitions. [2021-12-17 22:26:41,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:41,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 214 transitions. [2021-12-17 22:26:41,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 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) [2021-12-17 22:26:41,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2021-12-17 22:26:41,468 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2021-12-17 22:26:41,468 INFO L186 Difference]: Start difference. First operand has 107 places, 106 transitions, 272 flow. Second operand 2 states and 214 transitions. [2021-12-17 22:26:41,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 102 transitions, 284 flow [2021-12-17 22:26:41,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:41,470 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 262 flow [2021-12-17 22:26:41,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=262, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2021-12-17 22:26:41,471 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2021-12-17 22:26:41,471 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 262 flow [2021-12-17 22:26:41,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 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) [2021-12-17 22:26:41,471 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:41,471 INFO L254 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] [2021-12-17 22:26:41,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 22:26:41,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1009870209, now seen corresponding path program 1 times [2021-12-17 22:26:41,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:41,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076639334] [2021-12-17 22:26:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:41,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:41,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076639334] [2021-12-17 22:26:41,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076639334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:41,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:41,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:41,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979759062] [2021-12-17 22:26:41,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:41,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:41,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:41,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 116 [2021-12-17 22:26:41,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 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) [2021-12-17 22:26:41,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:41,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 116 [2021-12-17 22:26:41,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:41,602 INFO L129 PetriNetUnfolder]: 86/1191 cut-off events. [2021-12-17 22:26:41,603 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2021-12-17 22:26:41,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 1191 events. 86/1191 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 7134 event pairs, 23 based on Foata normal form. 32/1121 useless extension candidates. Maximal degree in co-relation 1702. Up to 279 conditions per place. [2021-12-17 22:26:41,607 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 16 selfloop transitions, 2 changer transitions 3/105 dead transitions. [2021-12-17 22:26:41,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 105 transitions, 312 flow [2021-12-17 22:26:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:26:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:26:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2021-12-17 22:26:41,610 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8310344827586207 [2021-12-17 22:26:41,610 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2021-12-17 22:26:41,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2021-12-17 22:26:41,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:41,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2021-12-17 22:26:41,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 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) [2021-12-17 22:26:41,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 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) [2021-12-17 22:26:41,613 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 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) [2021-12-17 22:26:41,613 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 262 flow. Second operand 5 states and 482 transitions. [2021-12-17 22:26:41,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 105 transitions, 312 flow [2021-12-17 22:26:41,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 105 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:26:41,615 INFO L242 Difference]: Finished difference. Result has 114 places, 102 transitions, 278 flow [2021-12-17 22:26:41,615 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2021-12-17 22:26:41,615 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2021-12-17 22:26:41,615 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 278 flow [2021-12-17 22:26:41,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 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) [2021-12-17 22:26:41,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:41,616 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:26:41,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 22:26:41,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:41,617 INFO L85 PathProgramCache]: Analyzing trace with hash 202686097, now seen corresponding path program 1 times [2021-12-17 22:26:41,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:41,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864526141] [2021-12-17 22:26:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:41,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:41,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:41,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864526141] [2021-12-17 22:26:41,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864526141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:26:41,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:26:41,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:26:41,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370861384] [2021-12-17 22:26:41,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:26:41,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:26:41,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:41,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:26:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:26:41,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 116 [2021-12-17 22:26:41,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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) [2021-12-17 22:26:41,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:41,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 116 [2021-12-17 22:26:41,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:26:41,774 INFO L129 PetriNetUnfolder]: 95/1239 cut-off events. [2021-12-17 22:26:41,774 INFO L130 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2021-12-17 22:26:41,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 1239 events. 95/1239 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7807 event pairs, 7 based on Foata normal form. 0/1135 useless extension candidates. Maximal degree in co-relation 2255. Up to 454 conditions per place. [2021-12-17 22:26:41,779 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 43 selfloop transitions, 6 changer transitions 7/126 dead transitions. [2021-12-17 22:26:41,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 453 flow [2021-12-17 22:26:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:26:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:26:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2021-12-17 22:26:41,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7974137931034483 [2021-12-17 22:26:41,780 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2021-12-17 22:26:41,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2021-12-17 22:26:41,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:26:41,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2021-12-17 22:26:41,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 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) [2021-12-17 22:26:41,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 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) [2021-12-17 22:26:41,782 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 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) [2021-12-17 22:26:41,782 INFO L186 Difference]: Start difference. First operand has 114 places, 102 transitions, 278 flow. Second operand 4 states and 370 transitions. [2021-12-17 22:26:41,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 453 flow [2021-12-17 22:26:41,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 447 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 22:26:41,785 INFO L242 Difference]: Finished difference. Result has 114 places, 105 transitions, 312 flow [2021-12-17 22:26:41,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=114, PETRI_TRANSITIONS=105} [2021-12-17 22:26:41,786 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2021-12-17 22:26:41,786 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 105 transitions, 312 flow [2021-12-17 22:26:41,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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) [2021-12-17 22:26:41,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:26:41,786 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:26:41,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 22:26:41,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:26:41,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:26:41,787 INFO L85 PathProgramCache]: Analyzing trace with hash -796867189, now seen corresponding path program 1 times [2021-12-17 22:26:41,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:26:41,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975186776] [2021-12-17 22:26:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:41,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:26:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:26:41,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:26:41,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975186776] [2021-12-17 22:26:41,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975186776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:26:41,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499616505] [2021-12-17 22:26:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:26:41,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:26:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:26:41,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:26:41,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 22:26:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:26:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 22:26:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:26:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:26:42,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:26:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:26:42,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499616505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:26:42,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:26:42,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 28 [2021-12-17 22:26:42,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406854609] [2021-12-17 22:26:42,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:26:42,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 22:26:42,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:26:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 22:26:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-12-17 22:26:42,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 116 [2021-12-17 22:26:42,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 105 transitions, 312 flow. Second operand has 28 states, 28 states have (on average 45.57142857142857) internal successors, (1276), 28 states have internal predecessors, (1276), 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) [2021-12-17 22:26:42,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:26:42,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 116 [2021-12-17 22:26:42,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand