./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:04:57,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:04:57,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:04:57,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:04:57,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:04:57,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:04:57,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:04:57,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:04:57,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:04:57,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:04:57,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:04:57,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:04:57,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:04:57,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:04:57,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:04:57,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:04:57,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:04:57,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:04:57,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:04:57,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:04:57,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:04:57,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:04:57,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:04:57,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:04:57,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:04:57,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:04:57,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:04:57,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:04:57,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:04:57,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:04:57,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:04:57,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:04:57,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:04:57,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:04:57,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:04:57,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:04:57,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:04:57,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:04:57,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:04:57,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:04:57,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:04:57,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:04:57,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:04:57,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:04:57,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:04:57,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:04:57,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:04:57,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:04:57,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:04:57,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:04:57,527 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:04:57,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:04:57,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:04:57,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:04:57,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:04:57,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:04:57,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:04:57,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:04:57,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:04:57,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:04:57,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:04:57,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:04:57,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:04:57,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:04:57,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:04:57,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:04:57,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:04:57,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:04:57,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:04:57,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:04:57,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:04:57,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:04:57,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:04:57,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:04:57,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:04:57,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:04:57,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2021-12-17 23:04:57,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:04:57,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:04:57,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:04:57,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:04:57,771 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:04:57,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-12-17 23:04:57,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eac45f41/3d900735253e41078e7b3fe43eed9069/FLAG260aa2b8a [2021-12-17 23:04:58,200 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:04:58,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-12-17 23:04:58,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eac45f41/3d900735253e41078e7b3fe43eed9069/FLAG260aa2b8a [2021-12-17 23:04:58,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eac45f41/3d900735253e41078e7b3fe43eed9069 [2021-12-17 23:04:58,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:04:58,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:04:58,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:04:58,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:04:58,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:04:58,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35597d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58, skipping insertion in model container [2021-12-17 23:04:58,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:04:58,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:04:58,420 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-more-queue-add-2-nl.wvr.c[2870,2883] [2021-12-17 23:04:58,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:04:58,436 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:04:58,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-12-17 23:04:58,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:04:58,478 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:04:58,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58 WrapperNode [2021-12-17 23:04:58,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:04:58,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:04:58,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:04:58,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:04:58,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,520 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2021-12-17 23:04:58,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:04:58,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:04:58,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:04:58,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:04:58,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:04:58,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:04:58,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:04:58,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:04:58,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (1/1) ... [2021-12-17 23:04:58,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:04:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:04:58,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 23:04:58,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 23:04:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:04:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:04:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:04:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:04:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:04:58,664 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:04:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:04:58,664 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:04:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:04:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:04:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:04:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:04:58,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:04:58,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:04:58,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:04:58,666 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:04:58,750 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:04:58,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:04:58,995 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:04:59,065 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:04:59,065 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 23:04:59,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:04:59 BoogieIcfgContainer [2021-12-17 23:04:59,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:04:59,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:04:59,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:04:59,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:04:59,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:04:58" (1/3) ... [2021-12-17 23:04:59,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e168042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:04:59, skipping insertion in model container [2021-12-17 23:04:59,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:04:58" (2/3) ... [2021-12-17 23:04:59,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e168042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:04:59, skipping insertion in model container [2021-12-17 23:04:59,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:04:59" (3/3) ... [2021-12-17 23:04:59,074 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2021-12-17 23:04:59,085 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:04:59,086 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:04:59,086 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:04:59,086 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:04:59,121 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,121 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,121 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,122 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,122 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,122 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,122 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,122 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,123 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,123 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,123 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,123 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,123 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,123 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,124 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,124 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,124 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,124 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,125 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,125 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,125 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,126 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,126 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,126 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,126 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,127 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,127 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,127 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,127 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,127 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,127 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,128 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,128 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,128 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,128 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,128 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,129 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,129 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,129 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,129 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,130 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,131 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,132 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,133 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,133 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,133 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,137 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,137 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,138 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,138 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,138 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,138 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,140 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,140 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,140 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,141 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,141 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,141 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,141 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:04:59,143 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 23:04:59,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:04:59,187 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 23:04:59,188 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 23:04:59,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2021-12-17 23:04:59,238 INFO L129 PetriNetUnfolder]: 11/143 cut-off events. [2021-12-17 23:04:59,239 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:04:59,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2021-12-17 23:04:59,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2021-12-17 23:04:59,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2021-12-17 23:04:59,264 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2021-12-17 23:04:59,264 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:04:59,264 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:04:59,265 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:04:59,265 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:04:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:04:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 956022790, now seen corresponding path program 1 times [2021-12-17 23:04:59,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:04:59,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905055575] [2021-12-17 23:04:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:04:59,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:04:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:04:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:04:59,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:04:59,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905055575] [2021-12-17 23:04:59,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905055575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:04:59,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:04:59,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:04:59,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369328249] [2021-12-17 23:04:59,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:04:59,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:04:59,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:04:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:04:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:04:59,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2021-12-17 23:04:59,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:04:59,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2021-12-17 23:04:59,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:04:59,540 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2021-12-17 23:04:59,541 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-17 23:04:59,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 160 events. 12/160 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 5 based on Foata normal form. 14/161 useless extension candidates. Maximal degree in co-relation 104. Up to 22 conditions per place. [2021-12-17 23:04:59,543 INFO L132 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2021-12-17 23:04:59,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2021-12-17 23:04:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:04:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 23:04:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2021-12-17 23:04:59,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2021-12-17 23:04:59,562 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2021-12-17 23:04:59,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2021-12-17 23:04:59,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:04:59,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2021-12-17 23:04:59,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,572 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,573 INFO L186 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2021-12-17 23:04:59,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2021-12-17 23:04:59,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:04:59,579 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2021-12-17 23:04:59,582 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2021-12-17 23:04:59,584 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2021-12-17 23:04:59,584 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2021-12-17 23:04:59,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:04:59,585 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:04:59,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:04:59,585 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:04:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:04:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1518951431, now seen corresponding path program 1 times [2021-12-17 23:04:59,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:04:59,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707767783] [2021-12-17 23:04:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:04:59,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:04:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:04:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:04:59,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:04:59,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707767783] [2021-12-17 23:04:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707767783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:04:59,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:04:59,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:04:59,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637760142] [2021-12-17 23:04:59,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:04:59,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:04:59,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:04:59,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:04:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:04:59,709 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2021-12-17 23:04:59,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:04:59,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2021-12-17 23:04:59,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:04:59,789 INFO L129 PetriNetUnfolder]: 12/193 cut-off events. [2021-12-17 23:04:59,796 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:04:59,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 193 events. 12/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 294 event pairs, 5 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2021-12-17 23:04:59,797 INFO L132 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2021-12-17 23:04:59,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2021-12-17 23:04:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:04:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:04:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2021-12-17 23:04:59,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2021-12-17 23:04:59,801 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2021-12-17 23:04:59,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2021-12-17 23:04:59,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:04:59,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2021-12-17 23:04:59,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,809 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,809 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2021-12-17 23:04:59,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2021-12-17 23:04:59,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:04:59,813 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2021-12-17 23:04:59,814 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2021-12-17 23:04:59,815 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2021-12-17 23:04:59,815 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2021-12-17 23:04:59,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,815 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:04:59,816 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:04:59,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:04:59,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:04:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:04:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2021-12-17 23:04:59,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:04:59,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171656481] [2021-12-17 23:04:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:04:59,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:04:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:04:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:04:59,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:04:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171656481] [2021-12-17 23:04:59,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171656481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:04:59,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:04:59,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 23:04:59,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945568303] [2021-12-17 23:04:59,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:04:59,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 23:04:59,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:04:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 23:04:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:04:59,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 145 [2021-12-17 23:04:59,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:04:59,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 145 [2021-12-17 23:04:59,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:04:59,981 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2021-12-17 23:04:59,981 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-12-17 23:04:59,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 163 events. 12/163 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 216. Up to 22 conditions per place. [2021-12-17 23:04:59,983 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 12 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2021-12-17 23:04:59,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 319 flow [2021-12-17 23:04:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 23:04:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 23:04:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2021-12-17 23:04:59,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8827586206896552 [2021-12-17 23:04:59,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2021-12-17 23:04:59,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2021-12-17 23:04:59,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:04:59,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2021-12-17 23:04:59,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,987 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 384 transitions. [2021-12-17 23:04:59,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 319 flow [2021-12-17 23:04:59,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:04:59,989 INFO L242 Difference]: Finished difference. Result has 129 places, 125 transitions, 293 flow [2021-12-17 23:04:59,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2021-12-17 23:04:59,990 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2021-12-17 23:04:59,990 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 293 flow [2021-12-17 23:04:59,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:59,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:04:59,991 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:04:59,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:04:59,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:04:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:04:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1090197722, now seen corresponding path program 2 times [2021-12-17 23:04:59,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:04:59,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981436199] [2021-12-17 23:04:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:04:59,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:00,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981436199] [2021-12-17 23:05:00,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981436199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:00,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:00,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:00,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405951551] [2021-12-17 23:05:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:00,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:00,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:00,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:00,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:00,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:00,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 293 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:00,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:00,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:00,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:00,916 INFO L129 PetriNetUnfolder]: 120/413 cut-off events. [2021-12-17 23:05:00,916 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2021-12-17 23:05:00,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 413 events. 120/413 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1611 event pairs, 19 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 803. Up to 174 conditions per place. [2021-12-17 23:05:00,919 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 64 selfloop transitions, 21 changer transitions 6/171 dead transitions. [2021-12-17 23:05:00,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 604 flow [2021-12-17 23:05:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:05:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-17 23:05:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1605 transitions. [2021-12-17 23:05:00,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6511156186612576 [2021-12-17 23:05:00,923 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1605 transitions. [2021-12-17 23:05:00,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1605 transitions. [2021-12-17 23:05:00,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:00,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1605 transitions. [2021-12-17 23:05:00,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.41176470588235) internal successors, (1605), 17 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:00,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:00,930 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:00,930 INFO L186 Difference]: Start difference. First operand has 129 places, 125 transitions, 293 flow. Second operand 17 states and 1605 transitions. [2021-12-17 23:05:00,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 604 flow [2021-12-17 23:05:00,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 574 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-12-17 23:05:00,934 INFO L242 Difference]: Finished difference. Result has 151 places, 141 transitions, 395 flow [2021-12-17 23:05:00,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=395, PETRI_PLACES=151, PETRI_TRANSITIONS=141} [2021-12-17 23:05:00,935 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 21 predicate places. [2021-12-17 23:05:00,935 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 141 transitions, 395 flow [2021-12-17 23:05:00,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:00,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:00,936 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:00,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:05:00,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:00,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:00,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1592501492, now seen corresponding path program 3 times [2021-12-17 23:05:00,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:00,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313601652] [2021-12-17 23:05:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:00,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:01,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313601652] [2021-12-17 23:05:01,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313601652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:01,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:01,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:01,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100464563] [2021-12-17 23:05:01,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:01,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:01,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:01,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:01,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:01,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:01,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 141 transitions, 395 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:01,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:01,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:01,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:01,646 INFO L129 PetriNetUnfolder]: 130/473 cut-off events. [2021-12-17 23:05:01,646 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2021-12-17 23:05:01,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 473 events. 130/473 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2165 event pairs, 18 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1053. Up to 172 conditions per place. [2021-12-17 23:05:01,649 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 69 selfloop transitions, 26 changer transitions 6/181 dead transitions. [2021-12-17 23:05:01,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 755 flow [2021-12-17 23:05:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 23:05:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-17 23:05:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2021-12-17 23:05:01,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2021-12-17 23:05:01,653 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2021-12-17 23:05:01,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2021-12-17 23:05:01,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:01,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2021-12-17 23:05:01,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:01,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:01,660 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:01,660 INFO L186 Difference]: Start difference. First operand has 151 places, 141 transitions, 395 flow. Second operand 18 states and 1701 transitions. [2021-12-17 23:05:01,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 755 flow [2021-12-17 23:05:01,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 735 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-12-17 23:05:01,664 INFO L242 Difference]: Finished difference. Result has 164 places, 146 transitions, 482 flow [2021-12-17 23:05:01,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=482, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2021-12-17 23:05:01,665 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 34 predicate places. [2021-12-17 23:05:01,665 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 482 flow [2021-12-17 23:05:01,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:01,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:01,666 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:01,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:05:01,667 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash -310511406, now seen corresponding path program 4 times [2021-12-17 23:05:01,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:01,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361377123] [2021-12-17 23:05:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:01,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:01,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361377123] [2021-12-17 23:05:01,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361377123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:01,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:01,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:01,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100760216] [2021-12-17 23:05:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:01,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:01,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:01,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:01,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 482 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:01,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:01,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:01,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:02,285 INFO L129 PetriNetUnfolder]: 141/517 cut-off events. [2021-12-17 23:05:02,286 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2021-12-17 23:05:02,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 517 events. 141/517 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2543 event pairs, 46 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 1321. Up to 229 conditions per place. [2021-12-17 23:05:02,289 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 29 changer transitions 6/185 dead transitions. [2021-12-17 23:05:02,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 901 flow [2021-12-17 23:05:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2021-12-17 23:05:02,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2021-12-17 23:05:02,293 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2021-12-17 23:05:02,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2021-12-17 23:05:02,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:02,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2021-12-17 23:05:02,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,299 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,299 INFO L186 Difference]: Start difference. First operand has 164 places, 146 transitions, 482 flow. Second operand 16 states and 1517 transitions. [2021-12-17 23:05:02,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 901 flow [2021-12-17 23:05:02,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 185 transitions, 813 flow, removed 26 selfloop flow, removed 12 redundant places. [2021-12-17 23:05:02,304 INFO L242 Difference]: Finished difference. Result has 172 places, 158 transitions, 615 flow [2021-12-17 23:05:02,304 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=615, PETRI_PLACES=172, PETRI_TRANSITIONS=158} [2021-12-17 23:05:02,305 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 42 predicate places. [2021-12-17 23:05:02,305 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 158 transitions, 615 flow [2021-12-17 23:05:02,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:02,306 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:02,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:05:02,306 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:02,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1331714556, now seen corresponding path program 5 times [2021-12-17 23:05:02,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:02,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674745926] [2021-12-17 23:05:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:02,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:02,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:02,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674745926] [2021-12-17 23:05:02,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674745926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:02,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:02,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:02,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731241600] [2021-12-17 23:05:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:02,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:02,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:02,633 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:02,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 158 transitions, 615 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:02,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:02,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:02,900 INFO L129 PetriNetUnfolder]: 145/538 cut-off events. [2021-12-17 23:05:02,900 INFO L130 PetriNetUnfolder]: For 746/746 co-relation queries the response was YES. [2021-12-17 23:05:02,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 538 events. 145/538 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2705 event pairs, 48 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 1506. Up to 241 conditions per place. [2021-12-17 23:05:02,904 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 74 selfloop transitions, 35 changer transitions 6/195 dead transitions. [2021-12-17 23:05:02,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 195 transitions, 1077 flow [2021-12-17 23:05:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2021-12-17 23:05:02,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2021-12-17 23:05:02,908 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2021-12-17 23:05:02,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2021-12-17 23:05:02,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:02,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2021-12-17 23:05:02,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,915 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,915 INFO L186 Difference]: Start difference. First operand has 172 places, 158 transitions, 615 flow. Second operand 16 states and 1519 transitions. [2021-12-17 23:05:02,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 195 transitions, 1077 flow [2021-12-17 23:05:02,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 195 transitions, 1016 flow, removed 15 selfloop flow, removed 9 redundant places. [2021-12-17 23:05:02,922 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 815 flow [2021-12-17 23:05:02,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=815, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2021-12-17 23:05:02,923 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 53 predicate places. [2021-12-17 23:05:02,923 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 815 flow [2021-12-17 23:05:02,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:02,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:02,924 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:02,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 23:05:02,925 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash 496787528, now seen corresponding path program 6 times [2021-12-17 23:05:02,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:02,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42856410] [2021-12-17 23:05:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:02,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:03,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:03,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42856410] [2021-12-17 23:05:03,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42856410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:03,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:03,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:03,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393012632] [2021-12-17 23:05:03,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:03,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:03,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:03,222 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:03,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 815 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:03,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:03,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:03,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:03,469 INFO L129 PetriNetUnfolder]: 146/545 cut-off events. [2021-12-17 23:05:03,470 INFO L130 PetriNetUnfolder]: For 1213/1213 co-relation queries the response was YES. [2021-12-17 23:05:03,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 545 events. 146/545 cut-off events. For 1213/1213 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2805 event pairs, 43 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 1652. Up to 255 conditions per place. [2021-12-17 23:05:03,474 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 78 selfloop transitions, 30 changer transitions 7/195 dead transitions. [2021-12-17 23:05:03,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 1186 flow [2021-12-17 23:05:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2021-12-17 23:05:03,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2021-12-17 23:05:03,478 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2021-12-17 23:05:03,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2021-12-17 23:05:03,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:03,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2021-12-17 23:05:03,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.5) internal successors, (1512), 16 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:03,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:03,486 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:03,486 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 815 flow. Second operand 16 states and 1512 transitions. [2021-12-17 23:05:03,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 1186 flow [2021-12-17 23:05:03,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 1105 flow, removed 36 selfloop flow, removed 7 redundant places. [2021-12-17 23:05:03,493 INFO L242 Difference]: Finished difference. Result has 192 places, 173 transitions, 832 flow [2021-12-17 23:05:03,494 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=832, PETRI_PLACES=192, PETRI_TRANSITIONS=173} [2021-12-17 23:05:03,496 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 62 predicate places. [2021-12-17 23:05:03,515 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 173 transitions, 832 flow [2021-12-17 23:05:03,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:03,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:03,516 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:03,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 23:05:03,517 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1259341386, now seen corresponding path program 7 times [2021-12-17 23:05:03,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388334890] [2021-12-17 23:05:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:03,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:03,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388334890] [2021-12-17 23:05:03,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388334890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:03,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:03,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:03,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332458144] [2021-12-17 23:05:03,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:03,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:03,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:03,829 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:03,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 173 transitions, 832 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:03,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:03,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:03,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:04,101 INFO L129 PetriNetUnfolder]: 149/551 cut-off events. [2021-12-17 23:05:04,102 INFO L130 PetriNetUnfolder]: For 1324/1324 co-relation queries the response was YES. [2021-12-17 23:05:04,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1713 conditions, 551 events. 149/551 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2866 event pairs, 45 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 1683. Up to 255 conditions per place. [2021-12-17 23:05:04,105 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 31 changer transitions 6/197 dead transitions. [2021-12-17 23:05:04,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 1212 flow [2021-12-17 23:05:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2021-12-17 23:05:04,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2021-12-17 23:05:04,109 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2021-12-17 23:05:04,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2021-12-17 23:05:04,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:04,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2021-12-17 23:05:04,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,115 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,115 INFO L186 Difference]: Start difference. First operand has 192 places, 173 transitions, 832 flow. Second operand 16 states and 1514 transitions. [2021-12-17 23:05:04,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 1212 flow [2021-12-17 23:05:04,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1141 flow, removed 11 selfloop flow, removed 12 redundant places. [2021-12-17 23:05:04,122 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 855 flow [2021-12-17 23:05:04,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=855, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2021-12-17 23:05:04,123 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 65 predicate places. [2021-12-17 23:05:04,123 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 855 flow [2021-12-17 23:05:04,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:04,124 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:04,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 23:05:04,124 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:04,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2033596040, now seen corresponding path program 8 times [2021-12-17 23:05:04,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:04,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306892396] [2021-12-17 23:05:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:04,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:04,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306892396] [2021-12-17 23:05:04,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306892396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:04,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:04,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:04,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468506602] [2021-12-17 23:05:04,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:04,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:04,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:04,382 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:04,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 855 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:04,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:04,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:04,729 INFO L129 PetriNetUnfolder]: 153/574 cut-off events. [2021-12-17 23:05:04,730 INFO L130 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2021-12-17 23:05:04,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 574 events. 153/574 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3089 event pairs, 47 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1785. Up to 247 conditions per place. [2021-12-17 23:05:04,734 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 36 changer transitions 6/202 dead transitions. [2021-12-17 23:05:04,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 202 transitions, 1285 flow [2021-12-17 23:05:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:05:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-17 23:05:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2021-12-17 23:05:04,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2021-12-17 23:05:04,736 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2021-12-17 23:05:04,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2021-12-17 23:05:04,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:04,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2021-12-17 23:05:04,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.52941176470588) internal successors, (1607), 17 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,742 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,742 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 855 flow. Second operand 17 states and 1607 transitions. [2021-12-17 23:05:04,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 202 transitions, 1285 flow [2021-12-17 23:05:04,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 202 transitions, 1201 flow, removed 12 selfloop flow, removed 14 redundant places. [2021-12-17 23:05:04,748 INFO L242 Difference]: Finished difference. Result has 200 places, 177 transitions, 908 flow [2021-12-17 23:05:04,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=908, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2021-12-17 23:05:04,749 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2021-12-17 23:05:04,749 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 908 flow [2021-12-17 23:05:04,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:04,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:04,750 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 23:05:04,751 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1724094068, now seen corresponding path program 9 times [2021-12-17 23:05:04,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:04,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840565320] [2021-12-17 23:05:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:04,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:05,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840565320] [2021-12-17 23:05:05,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840565320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:05,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:05,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:05,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698661515] [2021-12-17 23:05:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:05,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:05,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:05,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:05,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:05,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:05,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:05,297 INFO L129 PetriNetUnfolder]: 154/581 cut-off events. [2021-12-17 23:05:05,297 INFO L130 PetriNetUnfolder]: For 2009/2009 co-relation queries the response was YES. [2021-12-17 23:05:05,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 581 events. 154/581 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3154 event pairs, 53 based on Foata normal form. 1/570 useless extension candidates. Maximal degree in co-relation 1867. Up to 275 conditions per place. [2021-12-17 23:05:05,301 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 83 selfloop transitions, 32 changer transitions 7/202 dead transitions. [2021-12-17 23:05:05,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 202 transitions, 1346 flow [2021-12-17 23:05:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2021-12-17 23:05:05,303 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2021-12-17 23:05:05,303 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2021-12-17 23:05:05,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2021-12-17 23:05:05,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:05,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2021-12-17 23:05:05,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,308 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,308 INFO L186 Difference]: Start difference. First operand has 200 places, 177 transitions, 908 flow. Second operand 16 states and 1514 transitions. [2021-12-17 23:05:05,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 202 transitions, 1346 flow [2021-12-17 23:05:05,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 1234 flow, removed 24 selfloop flow, removed 13 redundant places. [2021-12-17 23:05:05,316 INFO L242 Difference]: Finished difference. Result has 203 places, 179 transitions, 921 flow [2021-12-17 23:05:05,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=921, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2021-12-17 23:05:05,316 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 73 predicate places. [2021-12-17 23:05:05,316 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 921 flow [2021-12-17 23:05:05,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:05,317 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:05,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 23:05:05,317 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1551141820, now seen corresponding path program 10 times [2021-12-17 23:05:05,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374138253] [2021-12-17 23:05:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:05,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:05,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:05,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374138253] [2021-12-17 23:05:05,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374138253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:05,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:05,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:05,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207128358] [2021-12-17 23:05:05,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:05,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:05,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:05,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:05,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:05,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 921 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:05,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:05,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:05,885 INFO L129 PetriNetUnfolder]: 157/584 cut-off events. [2021-12-17 23:05:05,885 INFO L130 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2021-12-17 23:05:05,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 584 events. 157/584 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3188 event pairs, 47 based on Foata normal form. 1/573 useless extension candidates. Maximal degree in co-relation 1878. Up to 275 conditions per place. [2021-12-17 23:05:05,890 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 33 changer transitions 6/204 dead transitions. [2021-12-17 23:05:05,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 1348 flow [2021-12-17 23:05:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2021-12-17 23:05:05,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2021-12-17 23:05:05,892 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2021-12-17 23:05:05,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2021-12-17 23:05:05,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:05,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2021-12-17 23:05:05,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,896 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,896 INFO L186 Difference]: Start difference. First operand has 203 places, 179 transitions, 921 flow. Second operand 16 states and 1516 transitions. [2021-12-17 23:05:05,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 1348 flow [2021-12-17 23:05:05,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1270 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-17 23:05:05,905 INFO L242 Difference]: Finished difference. Result has 206 places, 180 transitions, 945 flow [2021-12-17 23:05:05,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=945, PETRI_PLACES=206, PETRI_TRANSITIONS=180} [2021-12-17 23:05:05,906 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2021-12-17 23:05:05,906 INFO L470 AbstractCegarLoop]: Abstraction has has 206 places, 180 transitions, 945 flow [2021-12-17 23:05:05,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:05,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:05,907 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:05,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 23:05:05,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -292756896, now seen corresponding path program 11 times [2021-12-17 23:05:05,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:05,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346134224] [2021-12-17 23:05:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:05,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:06,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346134224] [2021-12-17 23:05:06,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346134224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:06,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:06,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:06,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780717129] [2021-12-17 23:05:06,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:06,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:06,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:06,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:06,174 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:06,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 180 transitions, 945 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:06,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:06,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:06,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:06,493 INFO L129 PetriNetUnfolder]: 159/598 cut-off events. [2021-12-17 23:05:06,493 INFO L130 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2021-12-17 23:05:06,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 598 events. 159/598 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3307 event pairs, 51 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 1953. Up to 261 conditions per place. [2021-12-17 23:05:06,498 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 39 changer transitions 6/207 dead transitions. [2021-12-17 23:05:06,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 1407 flow [2021-12-17 23:05:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:05:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-17 23:05:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2021-12-17 23:05:06,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2021-12-17 23:05:06,502 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2021-12-17 23:05:06,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2021-12-17 23:05:06,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:06,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2021-12-17 23:05:06,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:06,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:06,510 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:06,510 INFO L186 Difference]: Start difference. First operand has 206 places, 180 transitions, 945 flow. Second operand 17 states and 1609 transitions. [2021-12-17 23:05:06,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 1407 flow [2021-12-17 23:05:06,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 207 transitions, 1315 flow, removed 14 selfloop flow, removed 14 redundant places. [2021-12-17 23:05:06,521 INFO L242 Difference]: Finished difference. Result has 210 places, 182 transitions, 986 flow [2021-12-17 23:05:06,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=986, PETRI_PLACES=210, PETRI_TRANSITIONS=182} [2021-12-17 23:05:06,522 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 80 predicate places. [2021-12-17 23:05:06,522 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 182 transitions, 986 flow [2021-12-17 23:05:06,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:06,523 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:06,523 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:06,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 23:05:06,523 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:06,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:06,524 INFO L85 PathProgramCache]: Analyzing trace with hash 789017708, now seen corresponding path program 12 times [2021-12-17 23:05:06,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:06,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619066955] [2021-12-17 23:05:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:06,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:06,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619066955] [2021-12-17 23:05:06,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619066955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:06,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:06,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:06,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412688213] [2021-12-17 23:05:06,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:06,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:06,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:06,812 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:06,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 182 transitions, 986 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:06,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:06,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:06,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:07,084 INFO L129 PetriNetUnfolder]: 160/599 cut-off events. [2021-12-17 23:05:07,085 INFO L130 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2021-12-17 23:05:07,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 599 events. 160/599 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3272 event pairs, 79 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 2016. Up to 289 conditions per place. [2021-12-17 23:05:07,090 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 35 changer transitions 7/207 dead transitions. [2021-12-17 23:05:07,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 207 transitions, 1465 flow [2021-12-17 23:05:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2021-12-17 23:05:07,092 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2021-12-17 23:05:07,092 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2021-12-17 23:05:07,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2021-12-17 23:05:07,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:07,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2021-12-17 23:05:07,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,099 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,099 INFO L186 Difference]: Start difference. First operand has 210 places, 182 transitions, 986 flow. Second operand 16 states and 1516 transitions. [2021-12-17 23:05:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 207 transitions, 1465 flow [2021-12-17 23:05:07,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 207 transitions, 1334 flow, removed 28 selfloop flow, removed 14 redundant places. [2021-12-17 23:05:07,110 INFO L242 Difference]: Finished difference. Result has 212 places, 184 transitions, 991 flow [2021-12-17 23:05:07,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=991, PETRI_PLACES=212, PETRI_TRANSITIONS=184} [2021-12-17 23:05:07,111 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 82 predicate places. [2021-12-17 23:05:07,111 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 184 transitions, 991 flow [2021-12-17 23:05:07,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:07,112 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:07,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 23:05:07,112 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1447154114, now seen corresponding path program 13 times [2021-12-17 23:05:07,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:07,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878805367] [2021-12-17 23:05:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:07,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:07,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:07,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878805367] [2021-12-17 23:05:07,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878805367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:07,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:07,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:05:07,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694200382] [2021-12-17 23:05:07,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:07,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:05:07,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:07,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:05:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:05:07,387 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-17 23:05:07,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 184 transitions, 991 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:07,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-17 23:05:07,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:07,658 INFO L129 PetriNetUnfolder]: 163/605 cut-off events. [2021-12-17 23:05:07,658 INFO L130 PetriNetUnfolder]: For 2717/2717 co-relation queries the response was YES. [2021-12-17 23:05:07,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 605 events. 163/605 cut-off events. For 2717/2717 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3286 event pairs, 82 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2024. Up to 289 conditions per place. [2021-12-17 23:05:07,663 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 87 selfloop transitions, 36 changer transitions 6/209 dead transitions. [2021-12-17 23:05:07,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 1457 flow [2021-12-17 23:05:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:05:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 23:05:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2021-12-17 23:05:07,665 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2021-12-17 23:05:07,665 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2021-12-17 23:05:07,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2021-12-17 23:05:07,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:07,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2021-12-17 23:05:07,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.875) internal successors, (1518), 16 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,670 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,670 INFO L186 Difference]: Start difference. First operand has 212 places, 184 transitions, 991 flow. Second operand 16 states and 1518 transitions. [2021-12-17 23:05:07,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 1457 flow [2021-12-17 23:05:07,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 209 transitions, 1370 flow, removed 15 selfloop flow, removed 12 redundant places. [2021-12-17 23:05:07,680 INFO L242 Difference]: Finished difference. Result has 215 places, 185 transitions, 1016 flow [2021-12-17 23:05:07,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1016, PETRI_PLACES=215, PETRI_TRANSITIONS=185} [2021-12-17 23:05:07,681 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2021-12-17 23:05:07,681 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 185 transitions, 1016 flow [2021-12-17 23:05:07,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:07,682 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:07,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 23:05:07,682 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -414570916, now seen corresponding path program 1 times [2021-12-17 23:05:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:07,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454846492] [2021-12-17 23:05:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:07,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:05:07,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454846492] [2021-12-17 23:05:07,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454846492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:05:07,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:05:07,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:05:07,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969219480] [2021-12-17 23:05:07,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:05:07,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:05:07,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:07,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:05:07,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:05:07,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2021-12-17 23:05:07,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 185 transitions, 1016 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:07,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2021-12-17 23:05:07,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:07,786 INFO L129 PetriNetUnfolder]: 42/481 cut-off events. [2021-12-17 23:05:07,787 INFO L130 PetriNetUnfolder]: For 3254/3333 co-relation queries the response was YES. [2021-12-17 23:05:07,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 481 events. 42/481 cut-off events. For 3254/3333 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2553 event pairs, 7 based on Foata normal form. 49/523 useless extension candidates. Maximal degree in co-relation 1339. Up to 48 conditions per place. [2021-12-17 23:05:07,790 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 16 selfloop transitions, 7 changer transitions 36/181 dead transitions. [2021-12-17 23:05:07,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 181 transitions, 1014 flow [2021-12-17 23:05:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:05:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 23:05:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2021-12-17 23:05:07,791 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9017241379310345 [2021-12-17 23:05:07,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2021-12-17 23:05:07,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2021-12-17 23:05:07,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:07,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2021-12-17 23:05:07,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,794 INFO L186 Difference]: Start difference. First operand has 215 places, 185 transitions, 1016 flow. Second operand 4 states and 523 transitions. [2021-12-17 23:05:07,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 181 transitions, 1014 flow [2021-12-17 23:05:07,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 181 transitions, 920 flow, removed 3 selfloop flow, removed 19 redundant places. [2021-12-17 23:05:07,801 INFO L242 Difference]: Finished difference. Result has 198 places, 139 transitions, 538 flow [2021-12-17 23:05:07,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=538, PETRI_PLACES=198, PETRI_TRANSITIONS=139} [2021-12-17 23:05:07,802 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 68 predicate places. [2021-12-17 23:05:07,804 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 139 transitions, 538 flow [2021-12-17 23:05:07,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:07,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:07,804 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:07,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 23:05:07,805 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:07,805 INFO L85 PathProgramCache]: Analyzing trace with hash 764234139, now seen corresponding path program 1 times [2021-12-17 23:05:07,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:07,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248866119] [2021-12-17 23:05:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:07,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:07,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248866119] [2021-12-17 23:05:07,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248866119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:05:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821786371] [2021-12-17 23:05:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:07,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:05:07,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:05:07,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:05:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 23:05:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:05:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:08,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:05:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:08,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821786371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:05:08,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:05:08,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-17 23:05:08,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405217579] [2021-12-17 23:05:08,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:05:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:05:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:05:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:05:08,554 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2021-12-17 23:05:08,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 139 transitions, 538 flow. Second operand has 19 states, 19 states have (on average 114.73684210526316) internal successors, (2180), 19 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:08,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:08,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2021-12-17 23:05:08,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:08,733 INFO L129 PetriNetUnfolder]: 40/411 cut-off events. [2021-12-17 23:05:08,733 INFO L130 PetriNetUnfolder]: For 2369/2429 co-relation queries the response was YES. [2021-12-17 23:05:08,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 411 events. 40/411 cut-off events. For 2369/2429 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1519 event pairs, 11 based on Foata normal form. 10/414 useless extension candidates. Maximal degree in co-relation 1143. Up to 58 conditions per place. [2021-12-17 23:05:08,736 INFO L132 encePairwiseOnDemand]: 133/145 looper letters, 28 selfloop transitions, 11 changer transitions 6/153 dead transitions. [2021-12-17 23:05:08,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 153 transitions, 697 flow [2021-12-17 23:05:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:05:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 23:05:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2021-12-17 23:05:08,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2021-12-17 23:05:08,738 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2021-12-17 23:05:08,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2021-12-17 23:05:08,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:08,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2021-12-17 23:05:08,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:08,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:08,742 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:08,743 INFO L186 Difference]: Start difference. First operand has 198 places, 139 transitions, 538 flow. Second operand 12 states and 1385 transitions. [2021-12-17 23:05:08,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 153 transitions, 697 flow [2021-12-17 23:05:08,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 153 transitions, 558 flow, removed 57 selfloop flow, removed 23 redundant places. [2021-12-17 23:05:08,747 INFO L242 Difference]: Finished difference. Result has 162 places, 143 transitions, 484 flow [2021-12-17 23:05:08,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=484, PETRI_PLACES=162, PETRI_TRANSITIONS=143} [2021-12-17 23:05:08,747 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 32 predicate places. [2021-12-17 23:05:08,748 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 143 transitions, 484 flow [2021-12-17 23:05:08,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.73684210526316) internal successors, (2180), 19 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:08,748 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:08,748 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:08,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 23:05:08,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 23:05:08,970 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 59982, now seen corresponding path program 2 times [2021-12-17 23:05:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:08,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875373353] [2021-12-17 23:05:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:08,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:09,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:09,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875373353] [2021-12-17 23:05:09,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875373353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:05:09,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363835901] [2021-12-17 23:05:09,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:05:09,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:09,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:05:09,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:05:09,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:05:09,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:05:09,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:05:09,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 23:05:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:05:10,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:05:10,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:05:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2021-12-17 23:05:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:10,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:05:10,732 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-17 23:05:10,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-12-17 23:05:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:11,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363835901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:05:11,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:05:11,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 14] total 50 [2021-12-17 23:05:11,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234448456] [2021-12-17 23:05:11,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:05:11,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 23:05:11,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:11,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 23:05:11,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 23:05:11,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2021-12-17 23:05:11,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 143 transitions, 484 flow. Second operand has 50 states, 50 states have (on average 76.14) internal successors, (3807), 50 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:11,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:11,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2021-12-17 23:05:11,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:13,791 INFO L129 PetriNetUnfolder]: 986/3457 cut-off events. [2021-12-17 23:05:13,792 INFO L130 PetriNetUnfolder]: For 3061/3169 co-relation queries the response was YES. [2021-12-17 23:05:13,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7914 conditions, 3457 events. 986/3457 cut-off events. For 3061/3169 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 31117 event pairs, 142 based on Foata normal form. 40/3271 useless extension candidates. Maximal degree in co-relation 7892. Up to 470 conditions per place. [2021-12-17 23:05:13,811 INFO L132 encePairwiseOnDemand]: 113/145 looper letters, 267 selfloop transitions, 121 changer transitions 0/459 dead transitions. [2021-12-17 23:05:13,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 459 transitions, 2541 flow [2021-12-17 23:05:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 23:05:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-17 23:05:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4145 transitions. [2021-12-17 23:05:13,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5497347480106101 [2021-12-17 23:05:13,823 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4145 transitions. [2021-12-17 23:05:13,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4145 transitions. [2021-12-17 23:05:13,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:13,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4145 transitions. [2021-12-17 23:05:13,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 79.71153846153847) internal successors, (4145), 52 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:13,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:13,843 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:13,844 INFO L186 Difference]: Start difference. First operand has 162 places, 143 transitions, 484 flow. Second operand 52 states and 4145 transitions. [2021-12-17 23:05:13,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 459 transitions, 2541 flow [2021-12-17 23:05:13,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 459 transitions, 2430 flow, removed 51 selfloop flow, removed 6 redundant places. [2021-12-17 23:05:13,853 INFO L242 Difference]: Finished difference. Result has 230 places, 271 transitions, 1678 flow [2021-12-17 23:05:13,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1678, PETRI_PLACES=230, PETRI_TRANSITIONS=271} [2021-12-17 23:05:13,853 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 100 predicate places. [2021-12-17 23:05:13,853 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 271 transitions, 1678 flow [2021-12-17 23:05:13,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 76.14) internal successors, (3807), 50 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:13,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:13,855 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:13,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 23:05:14,071 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,SelfDestructingSolverStorable17 [2021-12-17 23:05:14,071 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1659202116, now seen corresponding path program 3 times [2021-12-17 23:05:14,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:14,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988395580] [2021-12-17 23:05:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:14,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:14,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988395580] [2021-12-17 23:05:14,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988395580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:05:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003873637] [2021-12-17 23:05:14,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:05:14,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:05:14,404 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) [2021-12-17 23:05:14,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:05:14,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:05:14,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:05:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 23:05:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:05:15,033 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 23:05:15,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 23:05:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:05:15,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:05:15,129 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-17 23:05:15,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-12-17 23:05:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:05:15,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003873637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:05:15,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:05:15,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 22 [2021-12-17 23:05:15,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465241460] [2021-12-17 23:05:15,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:05:15,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:05:15,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:05:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:05:15,390 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2021-12-17 23:05:15,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 271 transitions, 1678 flow. Second operand has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:15,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:15,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2021-12-17 23:05:15,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:16,489 INFO L129 PetriNetUnfolder]: 1289/4321 cut-off events. [2021-12-17 23:05:16,490 INFO L130 PetriNetUnfolder]: For 13238/13760 co-relation queries the response was YES. [2021-12-17 23:05:16,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12593 conditions, 4321 events. 1289/4321 cut-off events. For 13238/13760 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 40850 event pairs, 309 based on Foata normal form. 182/4271 useless extension candidates. Maximal degree in co-relation 12548. Up to 1293 conditions per place. [2021-12-17 23:05:16,525 INFO L132 encePairwiseOnDemand]: 122/145 looper letters, 211 selfloop transitions, 100 changer transitions 0/396 dead transitions. [2021-12-17 23:05:16,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 396 transitions, 3280 flow [2021-12-17 23:05:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 23:05:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-17 23:05:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2685 transitions. [2021-12-17 23:05:16,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6613300492610837 [2021-12-17 23:05:16,528 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2685 transitions. [2021-12-17 23:05:16,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2685 transitions. [2021-12-17 23:05:16,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:16,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2685 transitions. [2021-12-17 23:05:16,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 95.89285714285714) internal successors, (2685), 28 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:16,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:16,535 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:16,535 INFO L186 Difference]: Start difference. First operand has 230 places, 271 transitions, 1678 flow. Second operand 28 states and 2685 transitions. [2021-12-17 23:05:16,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 396 transitions, 3280 flow [2021-12-17 23:05:16,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 396 transitions, 2909 flow, removed 164 selfloop flow, removed 16 redundant places. [2021-12-17 23:05:16,571 INFO L242 Difference]: Finished difference. Result has 249 places, 320 transitions, 2199 flow [2021-12-17 23:05:16,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2199, PETRI_PLACES=249, PETRI_TRANSITIONS=320} [2021-12-17 23:05:16,572 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 119 predicate places. [2021-12-17 23:05:16,572 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 320 transitions, 2199 flow [2021-12-17 23:05:16,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.95454545454545) internal successors, (2089), 22 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:16,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:16,573 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:16,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 23:05:16,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:16,791 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:16,791 INFO L85 PathProgramCache]: Analyzing trace with hash 357999926, now seen corresponding path program 4 times [2021-12-17 23:05:16,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:16,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107052252] [2021-12-17 23:05:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:16,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:17,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107052252] [2021-12-17 23:05:17,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107052252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:05:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045983375] [2021-12-17 23:05:17,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:05:17,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:17,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:05:17,244 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) [2021-12-17 23:05:17,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:05:17,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:05:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:05:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 23:05:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:05:18,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:05:18,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:05:18,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 23:05:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:18,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:05:18,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:05:18,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-12-17 23:05:18,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-17 23:05:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:19,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045983375] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:05:19,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:05:19,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2021-12-17 23:05:19,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686320646] [2021-12-17 23:05:19,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:05:19,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-17 23:05:19,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-17 23:05:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3006, Unknown=1, NotChecked=0, Total=3306 [2021-12-17 23:05:19,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2021-12-17 23:05:19,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 320 transitions, 2199 flow. Second operand has 58 states, 58 states have (on average 84.34482758620689) internal successors, (4892), 58 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:19,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:19,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2021-12-17 23:05:19,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:25,892 INFO L129 PetriNetUnfolder]: 2269/8063 cut-off events. [2021-12-17 23:05:25,893 INFO L130 PetriNetUnfolder]: For 35742/36521 co-relation queries the response was YES. [2021-12-17 23:05:25,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25101 conditions, 8063 events. 2269/8063 cut-off events. For 35742/36521 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 87534 event pairs, 325 based on Foata normal form. 526/8270 useless extension candidates. Maximal degree in co-relation 25050. Up to 1082 conditions per place. [2021-12-17 23:05:25,953 INFO L132 encePairwiseOnDemand]: 118/145 looper letters, 341 selfloop transitions, 280 changer transitions 0/700 dead transitions. [2021-12-17 23:05:25,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 700 transitions, 6381 flow [2021-12-17 23:05:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-17 23:05:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-12-17 23:05:25,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5942 transitions. [2021-12-17 23:05:25,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6026369168356998 [2021-12-17 23:05:25,980 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5942 transitions. [2021-12-17 23:05:25,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5942 transitions. [2021-12-17 23:05:25,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:25,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5942 transitions. [2021-12-17 23:05:25,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 87.38235294117646) internal successors, (5942), 68 states have internal predecessors, (5942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:26,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 145.0) internal successors, (10005), 69 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:26,012 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 145.0) internal successors, (10005), 69 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:26,012 INFO L186 Difference]: Start difference. First operand has 249 places, 320 transitions, 2199 flow. Second operand 68 states and 5942 transitions. [2021-12-17 23:05:26,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 700 transitions, 6381 flow [2021-12-17 23:05:26,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 700 transitions, 6270 flow, removed 36 selfloop flow, removed 18 redundant places. [2021-12-17 23:05:26,117 INFO L242 Difference]: Finished difference. Result has 322 places, 463 transitions, 4550 flow [2021-12-17 23:05:26,118 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4550, PETRI_PLACES=322, PETRI_TRANSITIONS=463} [2021-12-17 23:05:26,118 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 192 predicate places. [2021-12-17 23:05:26,118 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 463 transitions, 4550 flow [2021-12-17 23:05:26,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 84.34482758620689) internal successors, (4892), 58 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:26,120 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:26,120 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:26,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:05:26,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:26,337 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:26,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2137219766, now seen corresponding path program 5 times [2021-12-17 23:05:26,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:26,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38342243] [2021-12-17 23:05:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:26,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:26,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38342243] [2021-12-17 23:05:26,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38342243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:05:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876101931] [2021-12-17 23:05:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:05:26,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:05:26,921 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) [2021-12-17 23:05:26,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:05:26,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-17 23:05:26,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:05:26,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 23:05:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:05:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:05:27,204 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:05:27,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-17 23:05:27,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:05:28,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 23:05:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:28,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:05:28,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:05:28,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-12-17 23:05:28,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-17 23:05:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:29,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876101931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:05:29,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:05:29,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 57 [2021-12-17 23:05:29,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002522055] [2021-12-17 23:05:29,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:05:29,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 23:05:29,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 23:05:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2882, Unknown=11, NotChecked=0, Total=3192 [2021-12-17 23:05:29,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2021-12-17 23:05:29,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 463 transitions, 4550 flow. Second operand has 57 states, 57 states have (on average 84.33333333333333) internal successors, (4807), 57 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:29,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:29,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2021-12-17 23:05:29,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:05:35,120 INFO L129 PetriNetUnfolder]: 3465/11695 cut-off events. [2021-12-17 23:05:35,121 INFO L130 PetriNetUnfolder]: For 109784/112006 co-relation queries the response was YES. [2021-12-17 23:05:35,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44288 conditions, 11695 events. 3465/11695 cut-off events. For 109784/112006 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 130946 event pairs, 802 based on Foata normal form. 834/11867 useless extension candidates. Maximal degree in co-relation 44213. Up to 1677 conditions per place. [2021-12-17 23:05:35,263 INFO L132 encePairwiseOnDemand]: 118/145 looper letters, 473 selfloop transitions, 268 changer transitions 1/821 dead transitions. [2021-12-17 23:05:35,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 821 transitions, 10061 flow [2021-12-17 23:05:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 23:05:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-12-17 23:05:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4902 transitions. [2021-12-17 23:05:35,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6036945812807881 [2021-12-17 23:05:35,268 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4902 transitions. [2021-12-17 23:05:35,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4902 transitions. [2021-12-17 23:05:35,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:05:35,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4902 transitions. [2021-12-17 23:05:35,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 87.53571428571429) internal successors, (4902), 56 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:35,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 145.0) internal successors, (8265), 57 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:35,281 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 145.0) internal successors, (8265), 57 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:35,282 INFO L186 Difference]: Start difference. First operand has 322 places, 463 transitions, 4550 flow. Second operand 56 states and 4902 transitions. [2021-12-17 23:05:35,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 821 transitions, 10061 flow [2021-12-17 23:05:35,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 821 transitions, 9344 flow, removed 310 selfloop flow, removed 34 redundant places. [2021-12-17 23:05:35,820 INFO L242 Difference]: Finished difference. Result has 359 places, 546 transitions, 6354 flow [2021-12-17 23:05:35,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3631, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=6354, PETRI_PLACES=359, PETRI_TRANSITIONS=546} [2021-12-17 23:05:35,821 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 229 predicate places. [2021-12-17 23:05:35,821 INFO L470 AbstractCegarLoop]: Abstraction has has 359 places, 546 transitions, 6354 flow [2021-12-17 23:05:35,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 84.33333333333333) internal successors, (4807), 57 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:35,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:05:35,823 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:05:35,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:05:36,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:36,038 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:05:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:05:36,038 INFO L85 PathProgramCache]: Analyzing trace with hash 375060444, now seen corresponding path program 1 times [2021-12-17 23:05:36,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:05:36,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469204470] [2021-12-17 23:05:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:36,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:05:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:38,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:05:38,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469204470] [2021-12-17 23:05:38,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469204470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:05:38,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078853030] [2021-12-17 23:05:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:05:38,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:05:38,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:05:38,411 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) [2021-12-17 23:05:38,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:05:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:05:38,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-17 23:05:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:05:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:05:40,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:05:40,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-17 23:05:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:41,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:05:42,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:05:42,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2021-12-17 23:05:42,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-17 23:05:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:05:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078853030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:05:45,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:05:45,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 38, 37] total 110 [2021-12-17 23:05:45,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382560527] [2021-12-17 23:05:45,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:05:45,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-17 23:05:45,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:05:45,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-17 23:05:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=11245, Unknown=18, NotChecked=0, Total=11990 [2021-12-17 23:05:45,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2021-12-17 23:05:45,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 546 transitions, 6354 flow. Second operand has 110 states, 110 states have (on average 49.22727272727273) internal successors, (5415), 110 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:05:45,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:05:45,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2021-12-17 23:05:45,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:06:23,148 INFO L129 PetriNetUnfolder]: 19154/39091 cut-off events. [2021-12-17 23:06:23,148 INFO L130 PetriNetUnfolder]: For 375229/375249 co-relation queries the response was YES. [2021-12-17 23:06:23,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181106 conditions, 39091 events. 19154/39091 cut-off events. For 375229/375249 co-relation queries the response was YES. Maximal size of possible extension queue 1441. Compared 403789 event pairs, 2305 based on Foata normal form. 99/39125 useless extension candidates. Maximal degree in co-relation 181021. Up to 14644 conditions per place. [2021-12-17 23:06:24,091 INFO L132 encePairwiseOnDemand]: 101/145 looper letters, 636 selfloop transitions, 1153 changer transitions 233/2063 dead transitions. [2021-12-17 23:06:24,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 2063 transitions, 27834 flow [2021-12-17 23:06:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-12-17 23:06:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-12-17 23:06:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 8422 transitions. [2021-12-17 23:06:24,100 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35853554704129414 [2021-12-17 23:06:24,100 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 8422 transitions. [2021-12-17 23:06:24,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 8422 transitions. [2021-12-17 23:06:24,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:06:24,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 8422 transitions. [2021-12-17 23:06:24,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 51.98765432098765) internal successors, (8422), 162 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:24,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 145.0) internal successors, (23635), 163 states have internal predecessors, (23635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:24,126 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 145.0) internal successors, (23635), 163 states have internal predecessors, (23635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:24,126 INFO L186 Difference]: Start difference. First operand has 359 places, 546 transitions, 6354 flow. Second operand 162 states and 8422 transitions. [2021-12-17 23:06:24,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 2063 transitions, 27834 flow [2021-12-17 23:06:28,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 2063 transitions, 27276 flow, removed 163 selfloop flow, removed 28 redundant places. [2021-12-17 23:06:28,143 INFO L242 Difference]: Finished difference. Result has 520 places, 1438 transitions, 21578 flow [2021-12-17 23:06:28,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6117, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=21578, PETRI_PLACES=520, PETRI_TRANSITIONS=1438} [2021-12-17 23:06:28,144 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 390 predicate places. [2021-12-17 23:06:28,144 INFO L470 AbstractCegarLoop]: Abstraction has has 520 places, 1438 transitions, 21578 flow [2021-12-17 23:06:28,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 49.22727272727273) internal successors, (5415), 110 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:28,145 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:06:28,145 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:06:28,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:06:28,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:06:28,349 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:06:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:06:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2122696784, now seen corresponding path program 2 times [2021-12-17 23:06:28,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:06:28,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842004016] [2021-12-17 23:06:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:06:28,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:06:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:06:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:06:29,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:06:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842004016] [2021-12-17 23:06:29,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842004016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:06:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079428248] [2021-12-17 23:06:29,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:06:29,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:06:29,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:06:29,579 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) [2021-12-17 23:06:29,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:06:29,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:06:29,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:06:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-17 23:06:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:06:31,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-17 23:06:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:06:32,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:06:33,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:06:33,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-12-17 23:06:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:06:34,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079428248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:06:34,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:06:34,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 30] total 92 [2021-12-17 23:06:34,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444235675] [2021-12-17 23:06:34,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:06:34,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-17 23:06:34,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:06:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-17 23:06:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=7558, Unknown=0, NotChecked=0, Total=8372 [2021-12-17 23:06:34,994 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2021-12-17 23:06:34,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1438 transitions, 21578 flow. Second operand has 92 states, 92 states have (on average 58.40217391304348) internal successors, (5373), 92 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:34,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:06:34,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2021-12-17 23:06:34,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:06:53,772 INFO L129 PetriNetUnfolder]: 21396/43070 cut-off events. [2021-12-17 23:06:53,772 INFO L130 PetriNetUnfolder]: For 549328/549357 co-relation queries the response was YES. [2021-12-17 23:06:55,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253858 conditions, 43070 events. 21396/43070 cut-off events. For 549328/549357 co-relation queries the response was YES. Maximal size of possible extension queue 1542. Compared 445405 event pairs, 4558 based on Foata normal form. 30/42966 useless extension candidates. Maximal degree in co-relation 253747. Up to 26236 conditions per place. [2021-12-17 23:06:55,227 INFO L132 encePairwiseOnDemand]: 105/145 looper letters, 859 selfloop transitions, 1571 changer transitions 15/2491 dead transitions. [2021-12-17 23:06:55,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 2491 transitions, 42845 flow [2021-12-17 23:06:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 23:06:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-17 23:06:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4661 transitions. [2021-12-17 23:06:55,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42295825771324863 [2021-12-17 23:06:55,235 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4661 transitions. [2021-12-17 23:06:55,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4661 transitions. [2021-12-17 23:06:55,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:06:55,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4661 transitions. [2021-12-17 23:06:55,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 61.328947368421055) internal successors, (4661), 76 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:55,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 145.0) internal successors, (11165), 77 states have internal predecessors, (11165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:55,246 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 145.0) internal successors, (11165), 77 states have internal predecessors, (11165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:06:55,246 INFO L186 Difference]: Start difference. First operand has 520 places, 1438 transitions, 21578 flow. Second operand 76 states and 4661 transitions. [2021-12-17 23:06:55,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 2491 transitions, 42845 flow [2021-12-17 23:07:03,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 2491 transitions, 42059 flow, removed 335 selfloop flow, removed 43 redundant places. [2021-12-17 23:07:03,726 INFO L242 Difference]: Finished difference. Result has 540 places, 2239 transitions, 40975 flow [2021-12-17 23:07:03,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=21122, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=853, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=40975, PETRI_PLACES=540, PETRI_TRANSITIONS=2239} [2021-12-17 23:07:03,728 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 410 predicate places. [2021-12-17 23:07:03,728 INFO L470 AbstractCegarLoop]: Abstraction has has 540 places, 2239 transitions, 40975 flow [2021-12-17 23:07:03,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 58.40217391304348) internal successors, (5373), 92 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:03,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:03,729 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:07:03,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:07:03,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:07:03,933 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:07:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1619917466, now seen corresponding path program 3 times [2021-12-17 23:07:03,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:03,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688410581] [2021-12-17 23:07:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:03,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:05,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:05,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688410581] [2021-12-17 23:07:05,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688410581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:07:05,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250894505] [2021-12-17 23:07:05,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:07:05,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:07:05,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:07:05,511 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) [2021-12-17 23:07:05,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:07:05,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:07:05,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:07:05,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 23:07:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:07:06,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 23:07:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:07:07,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:07:08,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:07:08,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-12-17 23:07:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:07:08,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250894505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:07:08,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:07:08,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 23, 22] total 77 [2021-12-17 23:07:08,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317826090] [2021-12-17 23:07:08,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:07:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-17 23:07:08,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-17 23:07:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=5469, Unknown=0, NotChecked=0, Total=5852 [2021-12-17 23:07:08,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 145 [2021-12-17 23:07:08,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2239 transitions, 40975 flow. Second operand has 77 states, 77 states have (on average 51.896103896103895) internal successors, (3996), 77 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:08,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:08,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 145 [2021-12-17 23:07:08,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:41,399 INFO L129 PetriNetUnfolder]: 22950/47003 cut-off events. [2021-12-17 23:07:41,399 INFO L130 PetriNetUnfolder]: For 806097/806139 co-relation queries the response was YES. [2021-12-17 23:07:43,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 319589 conditions, 47003 events. 22950/47003 cut-off events. For 806097/806139 co-relation queries the response was YES. Maximal size of possible extension queue 1782. Compared 500782 event pairs, 3027 based on Foata normal form. 38/46853 useless extension candidates. Maximal degree in co-relation 319465. Up to 20741 conditions per place. [2021-12-17 23:07:43,523 INFO L132 encePairwiseOnDemand]: 106/145 looper letters, 1609 selfloop transitions, 1543 changer transitions 82/3277 dead transitions. [2021-12-17 23:07:43,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 3277 transitions, 62187 flow [2021-12-17 23:07:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-17 23:07:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-12-17 23:07:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 6649 transitions. [2021-12-17 23:07:43,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3728062797869358 [2021-12-17 23:07:43,531 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 6649 transitions. [2021-12-17 23:07:43,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 6649 transitions. [2021-12-17 23:07:43,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:43,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 6649 transitions. [2021-12-17 23:07:43,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 54.05691056910569) internal successors, (6649), 123 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:43,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 145.0) internal successors, (17980), 124 states have internal predecessors, (17980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:43,553 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 145.0) internal successors, (17980), 124 states have internal predecessors, (17980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:43,553 INFO L186 Difference]: Start difference. First operand has 540 places, 2239 transitions, 40975 flow. Second operand 123 states and 6649 transitions. [2021-12-17 23:07:43,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 3277 transitions, 62187 flow [2021-12-17 23:07:56,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 3277 transitions, 61588 flow, removed 271 selfloop flow, removed 30 redundant places. [2021-12-17 23:07:56,310 INFO L242 Difference]: Finished difference. Result has 663 places, 2717 transitions, 52797 flow [2021-12-17 23:07:56,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=40542, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=52797, PETRI_PLACES=663, PETRI_TRANSITIONS=2717} [2021-12-17 23:07:56,312 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 533 predicate places. [2021-12-17 23:07:56,313 INFO L470 AbstractCegarLoop]: Abstraction has has 663 places, 2717 transitions, 52797 flow [2021-12-17 23:07:56,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 51.896103896103895) internal successors, (3996), 77 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,313 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:56,313 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:07:56,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 23:07:56,527 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,SelfDestructingSolverStorable23 [2021-12-17 23:07:56,528 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:07:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -574762340, now seen corresponding path program 4 times [2021-12-17 23:07:56,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:56,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285073846] [2021-12-17 23:07:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:56,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:57,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:57,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285073846] [2021-12-17 23:07:57,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285073846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:07:57,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736282809] [2021-12-17 23:07:57,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:07:57,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:07:57,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:07:57,750 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) [2021-12-17 23:07:57,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 23:07:57,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:07:57,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:07:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-17 23:07:57,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:07:59,743 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-17 23:07:59,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-12-17 23:08:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:00,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:08:01,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:08:01,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2021-12-17 23:08:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:03,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736282809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:08:03,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:08:03,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 32] total 91 [2021-12-17 23:08:03,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656320800] [2021-12-17 23:08:03,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:08:03,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-17 23:08:03,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-17 23:08:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=7493, Unknown=0, NotChecked=0, Total=8190 [2021-12-17 23:08:03,017 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2021-12-17 23:08:03,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 2717 transitions, 52797 flow. Second operand has 91 states, 91 states have (on average 58.42857142857143) internal successors, (5317), 91 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:03,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:03,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2021-12-17 23:08:03,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand