./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/weaver/popl20-nonblocking-cntr-alt.wvr.c -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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:48:41,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:48:41,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:48:41,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:48:41,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:48:41,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:48:41,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:48:41,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:48:41,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:48:41,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:48:41,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:48:41,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:48:41,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:48:41,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:48:41,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:48:41,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:48:41,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:48:41,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:48:41,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:48:41,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:48:41,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:48:41,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:48:41,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:48:41,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:48:41,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:48:41,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:48:41,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:48:41,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:48:41,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:48:41,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:48:41,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:48:41,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:48:41,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:48:41,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:48:41,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:48:41,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:48:41,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:48:41,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:48:41,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:48:41,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:48:41,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:48:41,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:48:41,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:48:41,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:48:41,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:48:41,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:48:41,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:48:41,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:48:41,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:48:41,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:48:41,466 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:48:41,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:48:41,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:48:41,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:48:41,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:48:41,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:48:41,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:48:41,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:48:41,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:48:41,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:48:41,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:48:41,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:48:41,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:48:41,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:48:41,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:48:41,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:48:41,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:48:41,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:48:41,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:48:41,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:48:41,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:48:41,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:48:41,471 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:48:41,472 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:48:41,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:48:41,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:48:41,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2021-12-22 13:48:41,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:48:41,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:48:41,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:48:41,665 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:48:41,665 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:48:41,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-22 13:48:41,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1c8e354/076f3c631da8464ab78f8cd519cd1dbf/FLAGa2fcc9c1b [2021-12-22 13:48:42,070 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:48:42,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-22 13:48:42,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1c8e354/076f3c631da8464ab78f8cd519cd1dbf/FLAGa2fcc9c1b [2021-12-22 13:48:42,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1c8e354/076f3c631da8464ab78f8cd519cd1dbf [2021-12-22 13:48:42,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:48:42,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:48:42,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:48:42,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:48:42,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:48:42,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188eba5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42, skipping insertion in model container [2021-12-22 13:48:42,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:48:42,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:48:42,240 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/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-22 13:48:42,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:48:42,248 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:48:42,260 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/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-22 13:48:42,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:48:42,270 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:48:42,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42 WrapperNode [2021-12-22 13:48:42,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:48:42,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:48:42,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:48:42,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:48:42,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,299 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2021-12-22 13:48:42,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:48:42,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:48:42,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:48:42,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:48:42,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:48:42,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:48:42,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:48:42,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:48:42,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (1/1) ... [2021-12-22 13:48:42,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:48:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:42,365 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) [2021-12-22 13:48:42,387 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 [2021-12-22 13:48:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:48:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:48:42,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:48:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:48:42,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:48:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:48:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:48:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:48:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:48:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:48:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:48:42,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:48:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:48:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:48:42,410 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:48:42,477 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:48:42,478 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:48:42,592 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:48:42,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:48:42,619 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:48:42,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:48:42 BoogieIcfgContainer [2021-12-22 13:48:42,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:48:42,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:48:42,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:48:42,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:48:42,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:48:42" (1/3) ... [2021-12-22 13:48:42,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43230d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:48:42, skipping insertion in model container [2021-12-22 13:48:42,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:42" (2/3) ... [2021-12-22 13:48:42,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43230d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:48:42, skipping insertion in model container [2021-12-22 13:48:42,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:48:42" (3/3) ... [2021-12-22 13:48:42,626 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2021-12-22 13:48:42,629 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:48:42,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:48:42,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:48:42,630 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:48:42,687 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,688 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,688 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,688 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,689 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,689 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,689 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,691 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,691 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,691 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,691 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,691 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,692 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,699 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,699 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,700 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,700 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,700 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,700 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,701 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,701 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,701 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,702 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,702 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,702 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,702 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,703 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,703 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,703 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,703 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,703 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,703 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,704 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,704 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,704 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,704 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,705 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,705 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,705 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,705 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,717 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,718 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,719 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,719 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,719 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,719 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:42,729 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:48:42,764 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:48:42,769 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 [2021-12-22 13:48:42,769 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:48:42,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2021-12-22 13:48:42,805 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2021-12-22 13:48:42,806 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:48:42,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-22 13:48:42,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2021-12-22 13:48:42,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2021-12-22 13:48:42,825 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-22 13:48:42,825 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:48:42,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:42,826 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] [2021-12-22 13:48:42,826 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:42,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:42,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2021-12-22 13:48:42,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:42,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767797995] [2021-12-22 13:48:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:42,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:42,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767797995] [2021-12-22 13:48:42,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767797995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:42,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:42,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:48:42,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379119556] [2021-12-22 13:48:42,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:42,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:48:42,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:48:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:48:43,013 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2021-12-22 13:48:43,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-12-22 13:48:43,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:43,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2021-12-22 13:48:43,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:43,053 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2021-12-22 13:48:43,054 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2021-12-22 13:48:43,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2021-12-22 13:48:43,056 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2021-12-22 13:48:43,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2021-12-22 13:48:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:48:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:48:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2021-12-22 13:48:43,066 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2021-12-22 13:48:43,067 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2021-12-22 13:48:43,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2021-12-22 13:48:43,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:43,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2021-12-22 13:48:43,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:43,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2021-12-22 13:48:43,081 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2021-12-22 13:48:43,082 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2021-12-22 13:48:43,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2021-12-22 13:48:43,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:48:43,092 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2021-12-22 13:48:43,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2021-12-22 13:48:43,100 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2021-12-22 13:48:43,101 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2021-12-22 13:48:43,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-12-22 13:48:43,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:43,101 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] [2021-12-22 13:48:43,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:48:43,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -305653797, now seen corresponding path program 1 times [2021-12-22 13:48:43,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383812706] [2021-12-22 13:48:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:43,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:43,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:43,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383812706] [2021-12-22 13:48:43,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383812706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:43,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:43,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:48:43,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199288439] [2021-12-22 13:48:43,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:43,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:48:43,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:48:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:48:43,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2021-12-22 13:48:43,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 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) [2021-12-22 13:48:43,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:43,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2021-12-22 13:48:43,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:43,476 INFO L129 PetriNetUnfolder]: 41/148 cut-off events. [2021-12-22 13:48:43,476 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-22 13:48:43,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 148 events. 41/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 13 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2021-12-22 13:48:43,477 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2021-12-22 13:48:43,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 213 flow [2021-12-22 13:48:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:48:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:48:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2021-12-22 13:48:43,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2021-12-22 13:48:43,480 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2021-12-22 13:48:43,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2021-12-22 13:48:43,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:43,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2021-12-22 13:48:43,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 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) [2021-12-22 13:48:43,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 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) [2021-12-22 13:48:43,484 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 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) [2021-12-22 13:48:43,484 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 366 transitions. [2021-12-22 13:48:43,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 213 flow [2021-12-22 13:48:43,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:48:43,486 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2021-12-22 13:48:43,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2021-12-22 13:48:43,487 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2021-12-22 13:48:43,487 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2021-12-22 13:48:43,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 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) [2021-12-22 13:48:43,487 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:43,487 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] [2021-12-22 13:48:43,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:48:43,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash -443057429, now seen corresponding path program 1 times [2021-12-22 13:48:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:43,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469019219] [2021-12-22 13:48:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:43,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:43,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469019219] [2021-12-22 13:48:43,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469019219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:48:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275828460] [2021-12-22 13:48:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:43,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:43,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:43,584 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) [2021-12-22 13:48:43,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:48:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:43,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:48:43,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:48:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:43,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:48:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:44,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275828460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:44,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:44,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-22 13:48:44,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162446210] [2021-12-22 13:48:44,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:44,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:48:44,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:48:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:48:44,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2021-12-22 13:48:44,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 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) [2021-12-22 13:48:44,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:44,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2021-12-22 13:48:44,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:44,102 INFO L129 PetriNetUnfolder]: 27/138 cut-off events. [2021-12-22 13:48:44,102 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-12-22 13:48:44,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 138 events. 27/138 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 357 event pairs, 5 based on Foata normal form. 4/136 useless extension candidates. Maximal degree in co-relation 221. Up to 25 conditions per place. [2021-12-22 13:48:44,104 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 19 selfloop transitions, 7 changer transitions 2/83 dead transitions. [2021-12-22 13:48:44,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 254 flow [2021-12-22 13:48:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:48:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:48:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2021-12-22 13:48:44,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441860465116279 [2021-12-22 13:48:44,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2021-12-22 13:48:44,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2021-12-22 13:48:44,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:44,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2021-12-22 13:48:44,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 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) [2021-12-22 13:48:44,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 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) [2021-12-22 13:48:44,115 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 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) [2021-12-22 13:48:44,115 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 5 states and 363 transitions. [2021-12-22 13:48:44,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 254 flow [2021-12-22 13:48:44,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:48:44,118 INFO L242 Difference]: Finished difference. Result has 81 places, 76 transitions, 212 flow [2021-12-22 13:48:44,119 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2021-12-22 13:48:44,120 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2021-12-22 13:48:44,120 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 212 flow [2021-12-22 13:48:44,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 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) [2021-12-22 13:48:44,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:44,121 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] [2021-12-22 13:48:44,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:48:44,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:44,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:44,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1484029817, now seen corresponding path program 1 times [2021-12-22 13:48:44,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:44,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340768848] [2021-12-22 13:48:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:44,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:44,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340768848] [2021-12-22 13:48:44,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340768848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:48:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103396604] [2021-12-22 13:48:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:44,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:44,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:44,596 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) [2021-12-22 13:48:44,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:48:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:44,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:48:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:48:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:45,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:48:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:45,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103396604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:45,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:45,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:48:45,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451085036] [2021-12-22 13:48:45,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:45,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:48:45,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:45,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:48:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:48:45,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:48:45,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 212 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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) [2021-12-22 13:48:45,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:45,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:48:45,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:47,181 INFO L129 PetriNetUnfolder]: 260/787 cut-off events. [2021-12-22 13:48:47,181 INFO L130 PetriNetUnfolder]: For 564/572 co-relation queries the response was YES. [2021-12-22 13:48:47,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 787 events. 260/787 cut-off events. For 564/572 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4626 event pairs, 6 based on Foata normal form. 7/754 useless extension candidates. Maximal degree in co-relation 2076. Up to 143 conditions per place. [2021-12-22 13:48:47,186 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 112 selfloop transitions, 121 changer transitions 53/327 dead transitions. [2021-12-22 13:48:47,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 327 transitions, 1946 flow [2021-12-22 13:48:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-22 13:48:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-22 13:48:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3152 transitions. [2021-12-22 13:48:47,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430028559771522 [2021-12-22 13:48:47,192 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3152 transitions. [2021-12-22 13:48:47,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3152 transitions. [2021-12-22 13:48:47,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:47,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3152 transitions. [2021-12-22 13:48:47,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.29824561403509) internal successors, (3152), 57 states have internal predecessors, (3152), 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) [2021-12-22 13:48:47,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 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) [2021-12-22 13:48:47,205 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 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) [2021-12-22 13:48:47,206 INFO L186 Difference]: Start difference. First operand has 81 places, 76 transitions, 212 flow. Second operand 57 states and 3152 transitions. [2021-12-22 13:48:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 327 transitions, 1946 flow [2021-12-22 13:48:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 327 transitions, 1946 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:48:47,213 INFO L242 Difference]: Finished difference. Result has 168 places, 203 transitions, 1379 flow [2021-12-22 13:48:47,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1379, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2021-12-22 13:48:47,214 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2021-12-22 13:48:47,214 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 1379 flow [2021-12-22 13:48:47,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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) [2021-12-22 13:48:47,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:47,215 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] [2021-12-22 13:48:47,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:48:47,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 13:48:47,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1760521617, now seen corresponding path program 2 times [2021-12-22 13:48:47,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:47,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227856139] [2021-12-22 13:48:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:47,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:47,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:47,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227856139] [2021-12-22 13:48:47,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227856139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:48:47,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503205329] [2021-12-22 13:48:47,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:48:47,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:47,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:48:47,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:48:47,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:48:47,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:48:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:48:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:48:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:48,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:48:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:48,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503205329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:48,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:48,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:48:48,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923804343] [2021-12-22 13:48:48,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:48,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:48:48,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:48:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:48:48,551 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:48:48,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 1379 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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) [2021-12-22 13:48:48,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:48,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:48:48,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:50,887 INFO L129 PetriNetUnfolder]: 347/1098 cut-off events. [2021-12-22 13:48:50,887 INFO L130 PetriNetUnfolder]: For 3000/3000 co-relation queries the response was YES. [2021-12-22 13:48:50,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 1098 events. 347/1098 cut-off events. For 3000/3000 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7229 event pairs, 15 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 4224. Up to 224 conditions per place. [2021-12-22 13:48:50,899 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 136 selfloop transitions, 230 changer transitions 34/441 dead transitions. [2021-12-22 13:48:50,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 441 transitions, 4005 flow [2021-12-22 13:48:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-22 13:48:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-12-22 13:48:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4115 transitions. [2021-12-22 13:48:50,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.637984496124031 [2021-12-22 13:48:50,908 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4115 transitions. [2021-12-22 13:48:50,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4115 transitions. [2021-12-22 13:48:50,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:50,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4115 transitions. [2021-12-22 13:48:50,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 54.86666666666667) internal successors, (4115), 75 states have internal predecessors, (4115), 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) [2021-12-22 13:48:50,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 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) [2021-12-22 13:48:50,929 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 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) [2021-12-22 13:48:50,929 INFO L186 Difference]: Start difference. First operand has 168 places, 203 transitions, 1379 flow. Second operand 75 states and 4115 transitions. [2021-12-22 13:48:50,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 441 transitions, 4005 flow [2021-12-22 13:48:50,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 3689 flow, removed 158 selfloop flow, removed 14 redundant places. [2021-12-22 13:48:50,955 INFO L242 Difference]: Finished difference. Result has 230 places, 332 transitions, 3004 flow [2021-12-22 13:48:50,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=3004, PETRI_PLACES=230, PETRI_TRANSITIONS=332} [2021-12-22 13:48:50,957 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 154 predicate places. [2021-12-22 13:48:50,957 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 332 transitions, 3004 flow [2021-12-22 13:48:50,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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) [2021-12-22 13:48:50,958 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:50,958 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] [2021-12-22 13:48:50,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:48:51,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:51,171 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1200502709, now seen corresponding path program 3 times [2021-12-22 13:48:51,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663753215] [2021-12-22 13:48:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:51,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:51,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663753215] [2021-12-22 13:48:51,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663753215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:48:51,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209220957] [2021-12-22 13:48:51,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:48:51,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:51,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:48:51,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:48:51,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:48:51,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:48:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:48:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:48:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:51,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:48:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:52,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209220957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:52,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:52,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-22 13:48:52,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288443581] [2021-12-22 13:48:52,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:52,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:48:52,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:48:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-12-22 13:48:52,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:48:52,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 332 transitions, 3004 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 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) [2021-12-22 13:48:52,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:52,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:48:52,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:54,342 INFO L129 PetriNetUnfolder]: 544/1748 cut-off events. [2021-12-22 13:48:54,342 INFO L130 PetriNetUnfolder]: For 7138/7157 co-relation queries the response was YES. [2021-12-22 13:48:54,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 1748 events. 544/1748 cut-off events. For 7138/7157 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13271 event pairs, 31 based on Foata normal form. 9/1751 useless extension candidates. Maximal degree in co-relation 7890. Up to 483 conditions per place. [2021-12-22 13:48:54,358 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 255 selfloop transitions, 331 changer transitions 37/664 dead transitions. [2021-12-22 13:48:54,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 664 transitions, 7611 flow [2021-12-22 13:48:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-22 13:48:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-22 13:48:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3363 transitions. [2021-12-22 13:48:54,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410598551277163 [2021-12-22 13:48:54,362 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3363 transitions. [2021-12-22 13:48:54,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3363 transitions. [2021-12-22 13:48:54,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:54,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3363 transitions. [2021-12-22 13:48:54,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 55.131147540983605) internal successors, (3363), 61 states have internal predecessors, (3363), 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) [2021-12-22 13:48:54,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 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) [2021-12-22 13:48:54,374 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 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) [2021-12-22 13:48:54,374 INFO L186 Difference]: Start difference. First operand has 230 places, 332 transitions, 3004 flow. Second operand 61 states and 3363 transitions. [2021-12-22 13:48:54,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 664 transitions, 7611 flow [2021-12-22 13:48:54,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 664 transitions, 7140 flow, removed 138 selfloop flow, removed 20 redundant places. [2021-12-22 13:48:54,418 INFO L242 Difference]: Finished difference. Result has 299 places, 542 transitions, 6409 flow [2021-12-22 13:48:54,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6409, PETRI_PLACES=299, PETRI_TRANSITIONS=542} [2021-12-22 13:48:54,419 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 223 predicate places. [2021-12-22 13:48:54,419 INFO L470 AbstractCegarLoop]: Abstraction has has 299 places, 542 transitions, 6409 flow [2021-12-22 13:48:54,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 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) [2021-12-22 13:48:54,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:54,420 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] [2021-12-22 13:48:54,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 13:48:54,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:54,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -596230533, now seen corresponding path program 4 times [2021-12-22 13:48:54,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:54,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416377464] [2021-12-22 13:48:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:54,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:54,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:54,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416377464] [2021-12-22 13:48:54,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416377464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:48:54,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544841494] [2021-12-22 13:48:54,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:48:54,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:54,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:54,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:48:54,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:48:54,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:48:54,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:48:54,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:48:54,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:48:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:55,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:48:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:55,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544841494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:55,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:55,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-22 13:48:55,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707835805] [2021-12-22 13:48:55,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:55,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:48:55,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:55,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:48:55,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-22 13:48:55,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:48:55,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 542 transitions, 6409 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 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) [2021-12-22 13:48:55,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:55,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:48:55,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:58,245 INFO L129 PetriNetUnfolder]: 757/2442 cut-off events. [2021-12-22 13:48:58,246 INFO L130 PetriNetUnfolder]: For 18516/18567 co-relation queries the response was YES. [2021-12-22 13:48:58,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 2442 events. 757/2442 cut-off events. For 18516/18567 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20302 event pairs, 59 based on Foata normal form. 11/2447 useless extension candidates. Maximal degree in co-relation 13254. Up to 786 conditions per place. [2021-12-22 13:48:58,273 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 342 selfloop transitions, 462 changer transitions 48/893 dead transitions. [2021-12-22 13:48:58,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 893 transitions, 12607 flow [2021-12-22 13:48:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-22 13:48:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-22 13:48:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3585 transitions. [2021-12-22 13:48:58,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413237924865832 [2021-12-22 13:48:58,284 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3585 transitions. [2021-12-22 13:48:58,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3585 transitions. [2021-12-22 13:48:58,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:58,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3585 transitions. [2021-12-22 13:48:58,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.15384615384615) internal successors, (3585), 65 states have internal predecessors, (3585), 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) [2021-12-22 13:48:58,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 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) [2021-12-22 13:48:58,313 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 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) [2021-12-22 13:48:58,313 INFO L186 Difference]: Start difference. First operand has 299 places, 542 transitions, 6409 flow. Second operand 65 states and 3585 transitions. [2021-12-22 13:48:58,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 893 transitions, 12607 flow [2021-12-22 13:48:58,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 893 transitions, 12293 flow, removed 152 selfloop flow, removed 9 redundant places. [2021-12-22 13:48:58,466 INFO L242 Difference]: Finished difference. Result has 387 places, 757 transitions, 11210 flow [2021-12-22 13:48:58,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11210, PETRI_PLACES=387, PETRI_TRANSITIONS=757} [2021-12-22 13:48:58,467 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 311 predicate places. [2021-12-22 13:48:58,468 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 757 transitions, 11210 flow [2021-12-22 13:48:58,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 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) [2021-12-22 13:48:58,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:58,469 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] [2021-12-22 13:48:58,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:48:58,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:58,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:48:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1699910441, now seen corresponding path program 5 times [2021-12-22 13:48:58,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:58,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731998181] [2021-12-22 13:48:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:58,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:58,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731998181] [2021-12-22 13:48:58,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731998181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:48:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681247294] [2021-12-22 13:48:58,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:48:58,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:48:58,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:58,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:48:58,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:48:58,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:48:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:48:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:48:58,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:48:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:59,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:48:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:59,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681247294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:48:59,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:48:59,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:48:59,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559459677] [2021-12-22 13:48:59,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:48:59,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:48:59,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:48:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:48:59,772 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:48:59,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 757 transitions, 11210 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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) [2021-12-22 13:48:59,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:59,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:48:59,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:02,863 INFO L129 PetriNetUnfolder]: 792/2558 cut-off events. [2021-12-22 13:49:02,864 INFO L130 PetriNetUnfolder]: For 32950/32974 co-relation queries the response was YES. [2021-12-22 13:49:02,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16678 conditions, 2558 events. 792/2558 cut-off events. For 32950/32974 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21500 event pairs, 25 based on Foata normal form. 7/2563 useless extension candidates. Maximal degree in co-relation 16564. Up to 504 conditions per place. [2021-12-22 13:49:02,898 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 232 selfloop transitions, 633 changer transitions 38/944 dead transitions. [2021-12-22 13:49:02,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 944 transitions, 15762 flow [2021-12-22 13:49:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-22 13:49:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-22 13:49:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4176 transitions. [2021-12-22 13:49:02,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6389228886168911 [2021-12-22 13:49:02,902 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4176 transitions. [2021-12-22 13:49:02,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4176 transitions. [2021-12-22 13:49:02,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:02,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4176 transitions. [2021-12-22 13:49:02,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.94736842105263) internal successors, (4176), 76 states have internal predecessors, (4176), 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) [2021-12-22 13:49:02,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 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) [2021-12-22 13:49:02,914 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 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) [2021-12-22 13:49:02,914 INFO L186 Difference]: Start difference. First operand has 387 places, 757 transitions, 11210 flow. Second operand 76 states and 4176 transitions. [2021-12-22 13:49:02,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 944 transitions, 15762 flow [2021-12-22 13:49:03,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 944 transitions, 15182 flow, removed 285 selfloop flow, removed 8 redundant places. [2021-12-22 13:49:03,166 INFO L242 Difference]: Finished difference. Result has 456 places, 822 transitions, 13352 flow [2021-12-22 13:49:03,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=13352, PETRI_PLACES=456, PETRI_TRANSITIONS=822} [2021-12-22 13:49:03,168 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 380 predicate places. [2021-12-22 13:49:03,168 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 822 transitions, 13352 flow [2021-12-22 13:49:03,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 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) [2021-12-22 13:49:03,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:03,169 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] [2021-12-22 13:49:03,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:03,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:03,383 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 351983375, now seen corresponding path program 6 times [2021-12-22 13:49:03,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:03,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185517041] [2021-12-22 13:49:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:03,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:03,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185517041] [2021-12-22 13:49:03,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185517041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039849247] [2021-12-22 13:49:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:49:03,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:03,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:03,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:49:03,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-22 13:49:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:03,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:03,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:03,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:04,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039849247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:04,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:04,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-22 13:49:04,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103685460] [2021-12-22 13:49:04,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:04,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:49:04,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:49:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-22 13:49:04,427 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:04,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 822 transitions, 13352 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 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) [2021-12-22 13:49:04,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:04,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:04,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:07,238 INFO L129 PetriNetUnfolder]: 907/3024 cut-off events. [2021-12-22 13:49:07,238 INFO L130 PetriNetUnfolder]: For 48445/48480 co-relation queries the response was YES. [2021-12-22 13:49:07,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 3024 events. 907/3024 cut-off events. For 48445/48480 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26809 event pairs, 100 based on Foata normal form. 5/3019 useless extension candidates. Maximal degree in co-relation 20828. Up to 1057 conditions per place. [2021-12-22 13:49:07,320 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 421 selfloop transitions, 567 changer transitions 50/1079 dead transitions. [2021-12-22 13:49:07,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1079 transitions, 19817 flow [2021-12-22 13:49:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-22 13:49:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-22 13:49:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3529 transitions. [2021-12-22 13:49:07,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6411700581395349 [2021-12-22 13:49:07,326 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3529 transitions. [2021-12-22 13:49:07,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3529 transitions. [2021-12-22 13:49:07,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:07,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3529 transitions. [2021-12-22 13:49:07,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.140625) internal successors, (3529), 64 states have internal predecessors, (3529), 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) [2021-12-22 13:49:07,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 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) [2021-12-22 13:49:07,339 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 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) [2021-12-22 13:49:07,339 INFO L186 Difference]: Start difference. First operand has 456 places, 822 transitions, 13352 flow. Second operand 64 states and 3529 transitions. [2021-12-22 13:49:07,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1079 transitions, 19817 flow [2021-12-22 13:49:07,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1079 transitions, 18789 flow, removed 174 selfloop flow, removed 40 redundant places. [2021-12-22 13:49:07,660 INFO L242 Difference]: Finished difference. Result has 497 places, 944 transitions, 17074 flow [2021-12-22 13:49:07,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=12570, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17074, PETRI_PLACES=497, PETRI_TRANSITIONS=944} [2021-12-22 13:49:07,661 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 421 predicate places. [2021-12-22 13:49:07,662 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 944 transitions, 17074 flow [2021-12-22 13:49:07,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 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) [2021-12-22 13:49:07,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:07,662 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] [2021-12-22 13:49:07,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:07,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:07,870 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -381220039, now seen corresponding path program 7 times [2021-12-22 13:49:07,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:07,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842634916] [2021-12-22 13:49:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:07,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:08,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:08,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842634916] [2021-12-22 13:49:08,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842634916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:08,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144154843] [2021-12-22 13:49:08,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:49:08,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:08,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:08,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:08,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:49:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:08,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:08,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144154843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:08,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:08,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:49:08,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590539560] [2021-12-22 13:49:08,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:08,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:49:08,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:49:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:49:08,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:08,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 944 transitions, 17074 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:08,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:08,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:08,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:12,560 INFO L129 PetriNetUnfolder]: 1130/3900 cut-off events. [2021-12-22 13:49:12,560 INFO L130 PetriNetUnfolder]: For 95550/95585 co-relation queries the response was YES. [2021-12-22 13:49:12,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29889 conditions, 3900 events. 1130/3900 cut-off events. For 95550/95585 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 37369 event pairs, 45 based on Foata normal form. 14/3910 useless extension candidates. Maximal degree in co-relation 29750. Up to 766 conditions per place. [2021-12-22 13:49:12,619 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 446 selfloop transitions, 830 changer transitions 31/1348 dead transitions. [2021-12-22 13:49:12,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1348 transitions, 27580 flow [2021-12-22 13:49:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-22 13:49:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-22 13:49:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4259 transitions. [2021-12-22 13:49:12,622 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6431591664149804 [2021-12-22 13:49:12,622 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4259 transitions. [2021-12-22 13:49:12,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4259 transitions. [2021-12-22 13:49:12,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:12,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4259 transitions. [2021-12-22 13:49:12,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.311688311688314) internal successors, (4259), 77 states have internal predecessors, (4259), 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) [2021-12-22 13:49:12,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 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) [2021-12-22 13:49:12,633 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 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) [2021-12-22 13:49:12,633 INFO L186 Difference]: Start difference. First operand has 497 places, 944 transitions, 17074 flow. Second operand 77 states and 4259 transitions. [2021-12-22 13:49:12,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1348 transitions, 27580 flow [2021-12-22 13:49:13,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1348 transitions, 26329 flow, removed 525 selfloop flow, removed 28 redundant places. [2021-12-22 13:49:13,339 INFO L242 Difference]: Finished difference. Result has 562 places, 1159 transitions, 23296 flow [2021-12-22 13:49:13,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=16312, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=23296, PETRI_PLACES=562, PETRI_TRANSITIONS=1159} [2021-12-22 13:49:13,341 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 486 predicate places. [2021-12-22 13:49:13,341 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 1159 transitions, 23296 flow [2021-12-22 13:49:13,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:13,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:13,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:13,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 13:49:13,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 13:49:13,555 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1766817381, now seen corresponding path program 8 times [2021-12-22 13:49:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513541415] [2021-12-22 13:49:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:13,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:13,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513541415] [2021-12-22 13:49:13,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513541415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368763205] [2021-12-22 13:49:13,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:49:13,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:13,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:13,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:13,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:49:13,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:49:13,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:13,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:14,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:14,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368763205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:14,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:14,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:49:14,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248982710] [2021-12-22 13:49:14,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:14,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:49:14,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:14,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:49:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:49:14,522 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:14,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1159 transitions, 23296 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 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) [2021-12-22 13:49:14,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:14,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:14,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:18,319 INFO L129 PetriNetUnfolder]: 1131/3759 cut-off events. [2021-12-22 13:49:18,320 INFO L130 PetriNetUnfolder]: For 115420/115455 co-relation queries the response was YES. [2021-12-22 13:49:18,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31640 conditions, 3759 events. 1131/3759 cut-off events. For 115420/115455 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35156 event pairs, 68 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 31500. Up to 766 conditions per place. [2021-12-22 13:49:18,377 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 325 selfloop transitions, 876 changer transitions 46/1288 dead transitions. [2021-12-22 13:49:18,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1288 transitions, 27966 flow [2021-12-22 13:49:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-22 13:49:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-22 13:49:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4384 transitions. [2021-12-22 13:49:18,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2021-12-22 13:49:18,382 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4384 transitions. [2021-12-22 13:49:18,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4384 transitions. [2021-12-22 13:49:18,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:18,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4384 transitions. [2021-12-22 13:49:18,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 54.8) internal successors, (4384), 80 states have internal predecessors, (4384), 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) [2021-12-22 13:49:18,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 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) [2021-12-22 13:49:18,393 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 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) [2021-12-22 13:49:18,394 INFO L186 Difference]: Start difference. First operand has 562 places, 1159 transitions, 23296 flow. Second operand 80 states and 4384 transitions. [2021-12-22 13:49:18,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1288 transitions, 27966 flow [2021-12-22 13:49:19,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1288 transitions, 26972 flow, removed 325 selfloop flow, removed 32 redundant places. [2021-12-22 13:49:19,163 INFO L242 Difference]: Finished difference. Result has 610 places, 1153 transitions, 24222 flow [2021-12-22 13:49:19,164 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22503, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=24222, PETRI_PLACES=610, PETRI_TRANSITIONS=1153} [2021-12-22 13:49:19,165 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 534 predicate places. [2021-12-22 13:49:19,165 INFO L470 AbstractCegarLoop]: Abstraction has has 610 places, 1153 transitions, 24222 flow [2021-12-22 13:49:19,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 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) [2021-12-22 13:49:19,165 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:19,165 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] [2021-12-22 13:49:19,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:19,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:19,379 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1296723879, now seen corresponding path program 9 times [2021-12-22 13:49:19,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:19,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364191768] [2021-12-22 13:49:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:19,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:19,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364191768] [2021-12-22 13:49:19,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364191768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846773933] [2021-12-22 13:49:19,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:49:19,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:19,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:19,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:19,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:49:19,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 13:49:19,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:19,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:20,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846773933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:20,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:20,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:49:20,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744715472] [2021-12-22 13:49:20,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:20,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:49:20,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:49:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:49:20,392 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:20,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1153 transitions, 24222 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:20,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:20,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:20,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:23,512 INFO L129 PetriNetUnfolder]: 1389/4472 cut-off events. [2021-12-22 13:49:23,512 INFO L130 PetriNetUnfolder]: For 142331/142366 co-relation queries the response was YES. [2021-12-22 13:49:23,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39489 conditions, 4472 events. 1389/4472 cut-off events. For 142331/142366 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43173 event pairs, 96 based on Foata normal form. 8/4464 useless extension candidates. Maximal degree in co-relation 39351. Up to 1427 conditions per place. [2021-12-22 13:49:23,577 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 450 selfloop transitions, 1094 changer transitions 23/1608 dead transitions. [2021-12-22 13:49:23,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1608 transitions, 37635 flow [2021-12-22 13:49:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-22 13:49:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-22 13:49:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3184 transitions. [2021-12-22 13:49:23,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383319967923016 [2021-12-22 13:49:23,580 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3184 transitions. [2021-12-22 13:49:23,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3184 transitions. [2021-12-22 13:49:23,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:23,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3184 transitions. [2021-12-22 13:49:23,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.89655172413793) internal successors, (3184), 58 states have internal predecessors, (3184), 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) [2021-12-22 13:49:23,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 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) [2021-12-22 13:49:23,587 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 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) [2021-12-22 13:49:23,587 INFO L186 Difference]: Start difference. First operand has 610 places, 1153 transitions, 24222 flow. Second operand 58 states and 3184 transitions. [2021-12-22 13:49:23,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1608 transitions, 37635 flow [2021-12-22 13:49:24,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1608 transitions, 35381 flow, removed 57 selfloop flow, removed 69 redundant places. [2021-12-22 13:49:24,552 INFO L242 Difference]: Finished difference. Result has 600 places, 1498 transitions, 34421 flow [2021-12-22 13:49:24,553 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22585, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=34421, PETRI_PLACES=600, PETRI_TRANSITIONS=1498} [2021-12-22 13:49:24,553 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 524 predicate places. [2021-12-22 13:49:24,554 INFO L470 AbstractCegarLoop]: Abstraction has has 600 places, 1498 transitions, 34421 flow [2021-12-22 13:49:24,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:24,554 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:24,554 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] [2021-12-22 13:49:24,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:24,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 13:49:24,755 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944037, now seen corresponding path program 10 times [2021-12-22 13:49:24,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:24,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847727957] [2021-12-22 13:49:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:24,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:24,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:24,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847727957] [2021-12-22 13:49:24,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847727957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:24,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137427135] [2021-12-22 13:49:24,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:49:24,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:24,918 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:24,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:49:24,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:49:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:24,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:24,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:25,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137427135] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:25,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:25,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:49:25,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493170712] [2021-12-22 13:49:25,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:25,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:49:25,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:49:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:49:25,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:25,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1498 transitions, 34421 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:25,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:25,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:25,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:30,263 INFO L129 PetriNetUnfolder]: 1542/5029 cut-off events. [2021-12-22 13:49:30,263 INFO L130 PetriNetUnfolder]: For 177983/178018 co-relation queries the response was YES. [2021-12-22 13:49:30,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45724 conditions, 5029 events. 1542/5029 cut-off events. For 177983/178018 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 50386 event pairs, 118 based on Foata normal form. 8/5019 useless extension candidates. Maximal degree in co-relation 45577. Up to 1425 conditions per place. [2021-12-22 13:49:30,338 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 426 selfloop transitions, 1299 changer transitions 53/1819 dead transitions. [2021-12-22 13:49:30,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1819 transitions, 45250 flow [2021-12-22 13:49:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-22 13:49:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-12-22 13:49:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3752 transitions. [2021-12-22 13:49:30,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415868673050615 [2021-12-22 13:49:30,341 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3752 transitions. [2021-12-22 13:49:30,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3752 transitions. [2021-12-22 13:49:30,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:30,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3752 transitions. [2021-12-22 13:49:30,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.1764705882353) internal successors, (3752), 68 states have internal predecessors, (3752), 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) [2021-12-22 13:49:30,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 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) [2021-12-22 13:49:30,350 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 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) [2021-12-22 13:49:30,350 INFO L186 Difference]: Start difference. First operand has 600 places, 1498 transitions, 34421 flow. Second operand 68 states and 3752 transitions. [2021-12-22 13:49:30,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1819 transitions, 45250 flow [2021-12-22 13:49:31,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1819 transitions, 44072 flow, removed 409 selfloop flow, removed 21 redundant places. [2021-12-22 13:49:31,854 INFO L242 Difference]: Finished difference. Result has 662 places, 1680 transitions, 41710 flow [2021-12-22 13:49:31,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=33397, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=41710, PETRI_PLACES=662, PETRI_TRANSITIONS=1680} [2021-12-22 13:49:31,857 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 586 predicate places. [2021-12-22 13:49:31,857 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 1680 transitions, 41710 flow [2021-12-22 13:49:31,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:31,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:31,858 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] [2021-12-22 13:49:31,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:32,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 13:49:32,075 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash -815631631, now seen corresponding path program 11 times [2021-12-22 13:49:32,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:32,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631012069] [2021-12-22 13:49:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:32,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:32,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631012069] [2021-12-22 13:49:32,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631012069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661034188] [2021-12-22 13:49:32,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:49:32,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:32,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:32,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:49:32,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:49:32,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:32,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:32,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:32,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:33,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661034188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:33,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:33,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:49:33,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061927017] [2021-12-22 13:49:33,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:33,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:49:33,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:33,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:49:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:49:33,142 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:33,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 1680 transitions, 41710 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 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) [2021-12-22 13:49:33,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:33,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:33,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:37,427 INFO L129 PetriNetUnfolder]: 1479/4684 cut-off events. [2021-12-22 13:49:37,428 INFO L130 PetriNetUnfolder]: For 177210/177234 co-relation queries the response was YES. [2021-12-22 13:49:37,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 4684 events. 1479/4684 cut-off events. For 177210/177234 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 45371 event pairs, 101 based on Foata normal form. 7/4685 useless extension candidates. Maximal degree in co-relation 44739. Up to 1349 conditions per place. [2021-12-22 13:49:37,509 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 543 selfloop transitions, 1161 changer transitions 26/1771 dead transitions. [2021-12-22 13:49:37,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1771 transitions, 46862 flow [2021-12-22 13:49:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-22 13:49:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-12-22 13:49:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3405 transitions. [2021-12-22 13:49:37,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6385971492873218 [2021-12-22 13:49:37,512 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3405 transitions. [2021-12-22 13:49:37,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3405 transitions. [2021-12-22 13:49:37,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:37,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3405 transitions. [2021-12-22 13:49:37,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.91935483870968) internal successors, (3405), 62 states have internal predecessors, (3405), 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) [2021-12-22 13:49:37,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 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) [2021-12-22 13:49:37,520 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 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) [2021-12-22 13:49:37,520 INFO L186 Difference]: Start difference. First operand has 662 places, 1680 transitions, 41710 flow. Second operand 62 states and 3405 transitions. [2021-12-22 13:49:37,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1771 transitions, 46862 flow [2021-12-22 13:49:39,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1771 transitions, 45530 flow, removed 278 selfloop flow, removed 37 redundant places. [2021-12-22 13:49:39,100 INFO L242 Difference]: Finished difference. Result has 690 places, 1692 transitions, 43205 flow [2021-12-22 13:49:39,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40459, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=43205, PETRI_PLACES=690, PETRI_TRANSITIONS=1692} [2021-12-22 13:49:39,102 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 614 predicate places. [2021-12-22 13:49:39,102 INFO L470 AbstractCegarLoop]: Abstraction has has 690 places, 1692 transitions, 43205 flow [2021-12-22 13:49:39,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 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) [2021-12-22 13:49:39,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:39,103 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] [2021-12-22 13:49:39,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:39,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:49:39,319 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1921340575, now seen corresponding path program 12 times [2021-12-22 13:49:39,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:39,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121691008] [2021-12-22 13:49:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:39,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:39,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:39,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121691008] [2021-12-22 13:49:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121691008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:39,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33603697] [2021-12-22 13:49:39,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:49:39,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:39,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:39,492 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:39,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:49:39,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-22 13:49:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:39,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:40,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33603697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:40,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:40,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:49:40,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657063235] [2021-12-22 13:49:40,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:40,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:49:40,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:49:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:49:40,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:40,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1692 transitions, 43205 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:40,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:40,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:40,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:43,602 INFO L129 PetriNetUnfolder]: 1561/4845 cut-off events. [2021-12-22 13:49:43,602 INFO L130 PetriNetUnfolder]: For 189682/189706 co-relation queries the response was YES. [2021-12-22 13:49:43,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48552 conditions, 4845 events. 1561/4845 cut-off events. For 189682/189706 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 46770 event pairs, 116 based on Foata normal form. 5/4837 useless extension candidates. Maximal degree in co-relation 48390. Up to 2011 conditions per place. [2021-12-22 13:49:43,686 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 754 selfloop transitions, 1114 changer transitions 14/1923 dead transitions. [2021-12-22 13:49:43,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1923 transitions, 52668 flow [2021-12-22 13:49:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-22 13:49:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-22 13:49:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2211 transitions. [2021-12-22 13:49:43,688 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427325581395349 [2021-12-22 13:49:43,688 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2211 transitions. [2021-12-22 13:49:43,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2211 transitions. [2021-12-22 13:49:43,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:43,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2211 transitions. [2021-12-22 13:49:43,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.275) internal successors, (2211), 40 states have internal predecessors, (2211), 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) [2021-12-22 13:49:43,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 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) [2021-12-22 13:49:43,692 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 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) [2021-12-22 13:49:43,692 INFO L186 Difference]: Start difference. First operand has 690 places, 1692 transitions, 43205 flow. Second operand 40 states and 2211 transitions. [2021-12-22 13:49:43,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1923 transitions, 52668 flow [2021-12-22 13:49:45,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 691 places, 1923 transitions, 52017 flow, removed 82 selfloop flow, removed 30 redundant places. [2021-12-22 13:49:45,161 INFO L242 Difference]: Finished difference. Result has 708 places, 1847 transitions, 50811 flow [2021-12-22 13:49:45,163 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=42646, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=980, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=50811, PETRI_PLACES=708, PETRI_TRANSITIONS=1847} [2021-12-22 13:49:45,163 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 632 predicate places. [2021-12-22 13:49:45,163 INFO L470 AbstractCegarLoop]: Abstraction has has 708 places, 1847 transitions, 50811 flow [2021-12-22 13:49:45,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:45,164 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:45,164 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] [2021-12-22 13:49:45,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:45,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:49:45,382 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash 394267245, now seen corresponding path program 13 times [2021-12-22 13:49:45,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:45,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343821638] [2021-12-22 13:49:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:45,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:45,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343821638] [2021-12-22 13:49:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343821638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032705816] [2021-12-22 13:49:45,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:49:45,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:45,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:45,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:49:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:49:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:46,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:46,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032705816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:46,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:46,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-22 13:49:46,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851664556] [2021-12-22 13:49:46,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:49:46,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:49:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:49:46,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-22 13:49:46,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1847 transitions, 50811 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 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) [2021-12-22 13:49:46,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:46,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-22 13:49:46,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand