./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:20:11,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:20:11,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:20:11,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:20:11,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:20:11,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:20:11,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:20:11,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:20:11,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:20:11,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:20:11,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:20:11,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:20:11,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:20:11,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:20:11,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:20:11,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:20:11,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:20:11,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:20:11,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:20:11,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:20:11,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:20:11,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:20:11,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:20:11,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:20:11,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:20:11,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:20:11,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:20:11,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:20:11,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:20:11,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:20:11,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:20:11,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:20:11,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:20:11,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:20:11,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:20:11,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:20:11,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:20:11,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:20:11,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:20:11,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:20:11,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:20:11,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:20:11,446 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:20:11,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:20:11,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:20:11,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:20:11,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:20:11,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:20:11,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:20:11,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:20:11,449 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:20:11,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:20:11,450 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:20:11,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:20:11,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:20:11,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:20:11,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:20:11,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:20:11,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:20:11,451 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:20:11,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:20:11,452 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:20:11,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:20:11,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:20:11,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:20:11,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:20:11,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:20:11,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:20:11,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:20:11,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:20:11,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:20:11,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:20:11,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:20:11,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:20:11,455 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:20:11,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:20:11,455 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:20:11,456 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:20:11,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:20:11,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:20:11,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:20:11,779 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:20:11,779 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:20:11,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-31 03:20:12,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:20:13,066 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:20:13,066 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-31 03:20:13,072 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffa5930f2/b68dc5cc636745b29f226d653b111421/FLAG1a7915011 [2023-08-31 03:20:13,082 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffa5930f2/b68dc5cc636745b29f226d653b111421 [2023-08-31 03:20:13,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:20:13,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:20:13,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:20:13,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:20:13,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:20:13,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6574d8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13, skipping insertion in model container [2023-08-31 03:20:13,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:20:13,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:20:13,310 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-31 03:20:13,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:20:13,333 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:20:13,369 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-31 03:20:13,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:20:13,383 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:20:13,385 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:20:13,391 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:20:13,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13 WrapperNode [2023-08-31 03:20:13,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:20:13,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:20:13,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:20:13,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:20:13,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,445 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 168 [2023-08-31 03:20:13,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:20:13,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:20:13,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:20:13,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:20:13,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,490 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:20:13,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:20:13,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:20:13,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:20:13,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (1/1) ... [2023-08-31 03:20:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:20:13,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:13,530 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) [2023-08-31 03:20:13,543 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 [2023-08-31 03:20:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:20:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:20:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:20:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:20:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:20:13,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:20:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:20:13,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:20:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:20:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:20:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:20:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:20:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:20:13,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:20:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:20:13,579 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:20:13,690 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:20:13,691 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:20:14,007 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:20:14,088 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:20:14,094 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 03:20:14,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:20:14 BoogieIcfgContainer [2023-08-31 03:20:14,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:20:14,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:20:14,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:20:14,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:20:14,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:20:13" (1/3) ... [2023-08-31 03:20:14,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2418e5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:20:14, skipping insertion in model container [2023-08-31 03:20:14,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:20:13" (2/3) ... [2023-08-31 03:20:14,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2418e5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:20:14, skipping insertion in model container [2023-08-31 03:20:14,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:20:14" (3/3) ... [2023-08-31 03:20:14,105 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-08-31 03:20:14,112 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:20:14,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:20:14,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:20:14,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:20:14,196 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 03:20:14,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 292 flow [2023-08-31 03:20:14,315 INFO L130 PetriNetUnfolder]: 11/136 cut-off events. [2023-08-31 03:20:14,316 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:20:14,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 136 events. 11/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-08-31 03:20:14,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 292 flow [2023-08-31 03:20:14,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 128 transitions, 268 flow [2023-08-31 03:20:14,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:20:14,342 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 128 transitions, 268 flow [2023-08-31 03:20:14,345 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 128 transitions, 268 flow [2023-08-31 03:20:14,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 268 flow [2023-08-31 03:20:14,400 INFO L130 PetriNetUnfolder]: 11/128 cut-off events. [2023-08-31 03:20:14,400 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:20:14,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-08-31 03:20:14,403 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-08-31 03:20:18,645 INFO L134 LiptonReduction]: Checked pairs total: 839 [2023-08-31 03:20:18,645 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-31 03:20:18,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:20:18,660 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a7dc95d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:20:18,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 03:20:18,667 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 03:20:18,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:20:18,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:18,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:18,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:18,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash -272600085, now seen corresponding path program 1 times [2023-08-31 03:20:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:18,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142168079] [2023-08-31 03:20:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:18,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142168079] [2023-08-31 03:20:19,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142168079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:20:19,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:20:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:20:19,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919754065] [2023-08-31 03:20:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:20:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:20:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:20:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:20:19,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2023-08-31 03:20:19,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:19,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:19,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2023-08-31 03:20:19,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:19,296 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2023-08-31 03:20:19,296 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-31 03:20:19,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 24 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2023-08-31 03:20:19,300 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2023-08-31 03:20:19,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2023-08-31 03:20:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:20:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:20:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-31 03:20:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45295202952029523 [2023-08-31 03:20:19,321 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-31 03:20:19,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-31 03:20:19,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:19,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-31 03:20:19,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:19,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:19,333 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:19,335 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 491 transitions. [2023-08-31 03:20:19,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2023-08-31 03:20:19,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 03:20:19,339 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-08-31 03:20:19,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-08-31 03:20:19,345 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-31 03:20:19,345 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-08-31 03:20:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:19,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:19,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:20:19,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:19,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -799736851, now seen corresponding path program 1 times [2023-08-31 03:20:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:19,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770896558] [2023-08-31 03:20:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770896558] [2023-08-31 03:20:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770896558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:20:19,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:20:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 03:20:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971116496] [2023-08-31 03:20:19,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:20:19,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:20:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:20:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-31 03:20:20,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2023-08-31 03:20:20,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:20,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2023-08-31 03:20:20,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:20,263 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2023-08-31 03:20:20,264 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-31 03:20:20,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2023-08-31 03:20:20,267 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2023-08-31 03:20:20,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2023-08-31 03:20:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:20:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:20:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 914 transitions. [2023-08-31 03:20:20,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215867158671587 [2023-08-31 03:20:20,271 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 914 transitions. [2023-08-31 03:20:20,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 914 transitions. [2023-08-31 03:20:20,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:20,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 914 transitions. [2023-08-31 03:20:20,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.25) internal successors, (914), 8 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,282 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,282 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 914 transitions. [2023-08-31 03:20:20,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2023-08-31 03:20:20,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 03:20:20,284 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2023-08-31 03:20:20,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-31 03:20:20,285 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-31 03:20:20,285 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2023-08-31 03:20:20,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:20,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:20,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:20:20,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:20,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 143763307, now seen corresponding path program 2 times [2023-08-31 03:20:20,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:20,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648668344] [2023-08-31 03:20:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:20,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:20,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648668344] [2023-08-31 03:20:20,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648668344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:20:20,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:20:20,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 03:20:20,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281057818] [2023-08-31 03:20:20,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:20:20,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:20:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:20:20,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 03:20:20,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-31 03:20:20,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:20,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-31 03:20:20,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:20,941 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2023-08-31 03:20:20,941 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-08-31 03:20:20,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 408 event pairs, 9 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2023-08-31 03:20:20,943 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2023-08-31 03:20:20,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2023-08-31 03:20:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:20:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:20:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 901 transitions. [2023-08-31 03:20:20,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41559040590405905 [2023-08-31 03:20:20,947 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 901 transitions. [2023-08-31 03:20:20,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 901 transitions. [2023-08-31 03:20:20,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:20,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 901 transitions. [2023-08-31 03:20:20,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.625) internal successors, (901), 8 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,954 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,954 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 901 transitions. [2023-08-31 03:20:20,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2023-08-31 03:20:20,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-08-31 03:20:20,957 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2023-08-31 03:20:20,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-31 03:20:20,958 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-08-31 03:20:20,959 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2023-08-31 03:20:20,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:20,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:20,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:20,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:20:20,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:20,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1615625679, now seen corresponding path program 3 times [2023-08-31 03:20:20,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782286933] [2023-08-31 03:20:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782286933] [2023-08-31 03:20:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782286933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:20:21,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:20:21,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:20:21,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695924876] [2023-08-31 03:20:21,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:20:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:20:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:20:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:20:21,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-08-31 03:20:21,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:21,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-08-31 03:20:21,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:21,079 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2023-08-31 03:20:21,079 INFO L131 PetriNetUnfolder]: For 122/125 co-relation queries the response was YES. [2023-08-31 03:20:21,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 122/125 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 297 event pairs, 10 based on Foata normal form. 9/108 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2023-08-31 03:20:21,081 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-08-31 03:20:21,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2023-08-31 03:20:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:20:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:20:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-31 03:20:21,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46494464944649444 [2023-08-31 03:20:21,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-31 03:20:21,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-31 03:20:21,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:21,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-31 03:20:21,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,086 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 378 transitions. [2023-08-31 03:20:21,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2023-08-31 03:20:21,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-31 03:20:21,089 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2023-08-31 03:20:21,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-31 03:20:21,090 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-31 03:20:21,090 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2023-08-31 03:20:21,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:21,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:21,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 03:20:21,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:21,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:21,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2042112127, now seen corresponding path program 4 times [2023-08-31 03:20:21,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:21,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144681076] [2023-08-31 03:20:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:21,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:21,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:21,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144681076] [2023-08-31 03:20:21,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144681076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:20:21,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:20:21,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 03:20:21,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783749510] [2023-08-31 03:20:21,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:20:21,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:20:21,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:21,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:20:21,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 03:20:21,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-31 03:20:21,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:21,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-31 03:20:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:21,605 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2023-08-31 03:20:21,605 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-31 03:20:21,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 11 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2023-08-31 03:20:21,607 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-08-31 03:20:21,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2023-08-31 03:20:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:20:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:20:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 896 transitions. [2023-08-31 03:20:21,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132841328413284 [2023-08-31 03:20:21,610 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 896 transitions. [2023-08-31 03:20:21,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 896 transitions. [2023-08-31 03:20:21,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:21,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 896 transitions. [2023-08-31 03:20:21,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.0) internal successors, (896), 8 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,616 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,616 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 896 transitions. [2023-08-31 03:20:21,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2023-08-31 03:20:21,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 03:20:21,619 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2023-08-31 03:20:21,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-31 03:20:21,620 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-08-31 03:20:21,620 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2023-08-31 03:20:21,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:21,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:21,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:21,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 03:20:21,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:21,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:21,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1023024236, now seen corresponding path program 1 times [2023-08-31 03:20:21,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:21,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781355005] [2023-08-31 03:20:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:21,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781355005] [2023-08-31 03:20:21,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781355005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459259043] [2023-08-31 03:20:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:21,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:21,750 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) [2023-08-31 03:20:21,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:20:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:21,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:20:21,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:21,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:21,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459259043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:21,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:21,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 03:20:21,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894661940] [2023-08-31 03:20:21,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:21,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:20:21,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:20:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:20:22,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 271 [2023-08-31 03:20:22,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 12 states, 12 states have (on average 114.08333333333333) internal successors, (1369), 12 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:22,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 271 [2023-08-31 03:20:22,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:22,240 INFO L130 PetriNetUnfolder]: 98/203 cut-off events. [2023-08-31 03:20:22,240 INFO L131 PetriNetUnfolder]: For 311/325 co-relation queries the response was YES. [2023-08-31 03:20:22,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 203 events. 98/203 cut-off events. For 311/325 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 697 event pairs, 36 based on Foata normal form. 14/197 useless extension candidates. Maximal degree in co-relation 757. Up to 112 conditions per place. [2023-08-31 03:20:22,242 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 46 selfloop transitions, 7 changer transitions 4/59 dead transitions. [2023-08-31 03:20:22,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 451 flow [2023-08-31 03:20:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:20:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:20:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 710 transitions. [2023-08-31 03:20:22,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43665436654366546 [2023-08-31 03:20:22,245 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 710 transitions. [2023-08-31 03:20:22,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 710 transitions. [2023-08-31 03:20:22,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:22,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 710 transitions. [2023-08-31 03:20:22,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.33333333333333) internal successors, (710), 6 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,250 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,250 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 6 states and 710 transitions. [2023-08-31 03:20:22,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 451 flow [2023-08-31 03:20:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 401 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-31 03:20:22,253 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 238 flow [2023-08-31 03:20:22,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-31 03:20:22,254 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-31 03:20:22,254 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 238 flow [2023-08-31 03:20:22,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 114.08333333333333) internal successors, (1369), 12 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:22,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:22,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:22,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 03:20:22,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:22,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1249123538, now seen corresponding path program 1 times [2023-08-31 03:20:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:22,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211183049] [2023-08-31 03:20:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:22,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:22,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:22,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211183049] [2023-08-31 03:20:22,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211183049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:20:22,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:20:22,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:20:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050411416] [2023-08-31 03:20:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:20:22,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:20:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:20:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:20:22,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-08-31 03:20:22,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:22,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-08-31 03:20:22,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:22,629 INFO L130 PetriNetUnfolder]: 109/232 cut-off events. [2023-08-31 03:20:22,629 INFO L131 PetriNetUnfolder]: For 320/334 co-relation queries the response was YES. [2023-08-31 03:20:22,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 232 events. 109/232 cut-off events. For 320/334 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 828 event pairs, 15 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 646. Up to 83 conditions per place. [2023-08-31 03:20:22,631 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 34 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-08-31 03:20:22,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 432 flow [2023-08-31 03:20:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:20:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:20:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-08-31 03:20:22,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232472324723246 [2023-08-31 03:20:22,633 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-08-31 03:20:22,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-08-31 03:20:22,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:22,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-08-31 03:20:22,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,637 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,637 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 238 flow. Second operand 4 states and 512 transitions. [2023-08-31 03:20:22,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 432 flow [2023-08-31 03:20:22,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 407 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-31 03:20:22,640 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 214 flow [2023-08-31 03:20:22,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-31 03:20:22,641 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-08-31 03:20:22,641 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 214 flow [2023-08-31 03:20:22,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:22,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:22,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 03:20:22,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:22,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 935567924, now seen corresponding path program 2 times [2023-08-31 03:20:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:22,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997535900] [2023-08-31 03:20:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:23,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:23,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997535900] [2023-08-31 03:20:23,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997535900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:23,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999092349] [2023-08-31 03:20:23,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:20:23,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:23,104 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) [2023-08-31 03:20:23,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:20:23,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:20:23,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 03:20:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:23,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:23,537 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:20:23,538 INFO L350 Elim1Store]: Elim1 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 12 [2023-08-31 03:20:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:23,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999092349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:23,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:23,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-08-31 03:20:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867756835] [2023-08-31 03:20:23,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:23,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:20:23,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:20:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:20:24,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 271 [2023-08-31 03:20:24,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:24,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:24,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 271 [2023-08-31 03:20:24,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:24,649 INFO L130 PetriNetUnfolder]: 261/504 cut-off events. [2023-08-31 03:20:24,650 INFO L131 PetriNetUnfolder]: For 771/785 co-relation queries the response was YES. [2023-08-31 03:20:24,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 504 events. 261/504 cut-off events. For 771/785 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2184 event pairs, 30 based on Foata normal form. 6/389 useless extension candidates. Maximal degree in co-relation 1540. Up to 263 conditions per place. [2023-08-31 03:20:24,654 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 92 selfloop transitions, 49 changer transitions 0/143 dead transitions. [2023-08-31 03:20:24,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 143 transitions, 1152 flow [2023-08-31 03:20:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:20:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:20:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2093 transitions. [2023-08-31 03:20:24,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40648669644591184 [2023-08-31 03:20:24,661 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2093 transitions. [2023-08-31 03:20:24,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2093 transitions. [2023-08-31 03:20:24,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:24,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2093 transitions. [2023-08-31 03:20:24,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.15789473684211) internal successors, (2093), 19 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:24,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:24,675 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:24,675 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 214 flow. Second operand 19 states and 2093 transitions. [2023-08-31 03:20:24,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 143 transitions, 1152 flow [2023-08-31 03:20:24,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 143 transitions, 959 flow, removed 93 selfloop flow, removed 3 redundant places. [2023-08-31 03:20:24,682 INFO L231 Difference]: Finished difference. Result has 63 places, 83 transitions, 708 flow [2023-08-31 03:20:24,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=708, PETRI_PLACES=63, PETRI_TRANSITIONS=83} [2023-08-31 03:20:24,684 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-08-31 03:20:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 83 transitions, 708 flow [2023-08-31 03:20:24,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:24,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:24,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:24,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:24,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-31 03:20:24,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:24,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash -912937574, now seen corresponding path program 3 times [2023-08-31 03:20:24,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:24,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506065246] [2023-08-31 03:20:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:24,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506065246] [2023-08-31 03:20:25,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506065246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856182033] [2023-08-31 03:20:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:20:25,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:25,425 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) [2023-08-31 03:20:25,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:20:25,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:20:25,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 03:20:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:25,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:20:25,784 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:20:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:25,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:25,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:20:25,946 INFO L350 Elim1Store]: Elim1 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 37 [2023-08-31 03:20:25,952 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:20:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856182033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:26,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:26,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-08-31 03:20:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86991545] [2023-08-31 03:20:26,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:20:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:20:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=503, Unknown=2, NotChecked=0, Total=600 [2023-08-31 03:20:26,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-08-31 03:20:26,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 83 transitions, 708 flow. Second operand has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:26,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:26,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-08-31 03:20:26,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:28,957 INFO L130 PetriNetUnfolder]: 506/972 cut-off events. [2023-08-31 03:20:28,958 INFO L131 PetriNetUnfolder]: For 3068/3068 co-relation queries the response was YES. [2023-08-31 03:20:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4513 conditions, 972 events. 506/972 cut-off events. For 3068/3068 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4911 event pairs, 50 based on Foata normal form. 34/943 useless extension candidates. Maximal degree in co-relation 3660. Up to 357 conditions per place. [2023-08-31 03:20:28,965 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 150 selfloop transitions, 104 changer transitions 2/256 dead transitions. [2023-08-31 03:20:28,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 256 transitions, 2421 flow [2023-08-31 03:20:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:20:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:20:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2425 transitions. [2023-08-31 03:20:28,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3195835529783869 [2023-08-31 03:20:28,974 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2425 transitions. [2023-08-31 03:20:28,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2425 transitions. [2023-08-31 03:20:28,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:28,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2425 transitions. [2023-08-31 03:20:28,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 86.60714285714286) internal successors, (2425), 28 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:28,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:28,992 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:28,993 INFO L175 Difference]: Start difference. First operand has 63 places, 83 transitions, 708 flow. Second operand 28 states and 2425 transitions. [2023-08-31 03:20:28,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 256 transitions, 2421 flow [2023-08-31 03:20:29,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 256 transitions, 2240 flow, removed 81 selfloop flow, removed 3 redundant places. [2023-08-31 03:20:29,016 INFO L231 Difference]: Finished difference. Result has 101 places, 163 transitions, 1768 flow [2023-08-31 03:20:29,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1768, PETRI_PLACES=101, PETRI_TRANSITIONS=163} [2023-08-31 03:20:29,018 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-08-31 03:20:29,018 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 163 transitions, 1768 flow [2023-08-31 03:20:29,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:29,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:29,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:29,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:29,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:29,225 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:29,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1416627676, now seen corresponding path program 4 times [2023-08-31 03:20:29,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:29,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989004829] [2023-08-31 03:20:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:29,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:29,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989004829] [2023-08-31 03:20:29,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989004829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:29,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010274369] [2023-08-31 03:20:29,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:20:29,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:29,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:29,917 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) [2023-08-31 03:20:29,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:20:30,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:20:30,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 03:20:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:30,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:30,150 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:20:30,151 INFO L350 Elim1Store]: Elim1 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 12 [2023-08-31 03:20:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:20:30,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010274369] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:30,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:20:30,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2023-08-31 03:20:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127569780] [2023-08-31 03:20:30,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:20:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 03:20:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 03:20:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:20:30,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-31 03:20:30,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 163 transitions, 1768 flow. Second operand has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:30,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:30,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-31 03:20:30,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:30,472 INFO L130 PetriNetUnfolder]: 503/943 cut-off events. [2023-08-31 03:20:30,473 INFO L131 PetriNetUnfolder]: For 5747/5747 co-relation queries the response was YES. [2023-08-31 03:20:30,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 943 events. 503/943 cut-off events. For 5747/5747 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4608 event pairs, 86 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 5136. Up to 403 conditions per place. [2023-08-31 03:20:30,483 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 119 selfloop transitions, 64 changer transitions 1/184 dead transitions. [2023-08-31 03:20:30,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 2292 flow [2023-08-31 03:20:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:20:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:20:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 683 transitions. [2023-08-31 03:20:30,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200492004920049 [2023-08-31 03:20:30,486 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 683 transitions. [2023-08-31 03:20:30,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 683 transitions. [2023-08-31 03:20:30,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:30,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 683 transitions. [2023-08-31 03:20:30,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:30,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:30,491 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:30,491 INFO L175 Difference]: Start difference. First operand has 101 places, 163 transitions, 1768 flow. Second operand 6 states and 683 transitions. [2023-08-31 03:20:30,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 2292 flow [2023-08-31 03:20:30,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 184 transitions, 2052 flow, removed 113 selfloop flow, removed 6 redundant places. [2023-08-31 03:20:30,528 INFO L231 Difference]: Finished difference. Result has 98 places, 164 transitions, 1728 flow [2023-08-31 03:20:30,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1728, PETRI_PLACES=98, PETRI_TRANSITIONS=164} [2023-08-31 03:20:30,529 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-08-31 03:20:30,529 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 164 transitions, 1728 flow [2023-08-31 03:20:30,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:30,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:30,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:30,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:30,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:30,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:30,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:30,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1886042083, now seen corresponding path program 1 times [2023-08-31 03:20:30,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:30,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120572823] [2023-08-31 03:20:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:30,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120572823] [2023-08-31 03:20:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120572823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937730965] [2023-08-31 03:20:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:31,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:31,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:31,590 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) [2023-08-31 03:20:31,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:20:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:31,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 03:20:31,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:32,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:32,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:20:32,355 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 32 [2023-08-31 03:20:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:20:32,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937730965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:32,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:32,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-08-31 03:20:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58634425] [2023-08-31 03:20:32,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:32,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 03:20:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 03:20:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-08-31 03:20:34,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-31 03:20:34,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 164 transitions, 1728 flow. Second operand has 29 states, 29 states have (on average 91.82758620689656) internal successors, (2663), 29 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:34,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:34,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-31 03:20:34,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:37,236 INFO L130 PetriNetUnfolder]: 539/1015 cut-off events. [2023-08-31 03:20:37,236 INFO L131 PetriNetUnfolder]: For 6979/6979 co-relation queries the response was YES. [2023-08-31 03:20:37,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5600 conditions, 1015 events. 539/1015 cut-off events. For 6979/6979 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5132 event pairs, 75 based on Foata normal form. 2/1017 useless extension candidates. Maximal degree in co-relation 5564. Up to 497 conditions per place. [2023-08-31 03:20:37,246 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 136 selfloop transitions, 83 changer transitions 7/226 dead transitions. [2023-08-31 03:20:37,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 226 transitions, 2636 flow [2023-08-31 03:20:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:20:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:20:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1892 transitions. [2023-08-31 03:20:37,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34907749077490774 [2023-08-31 03:20:37,252 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1892 transitions. [2023-08-31 03:20:37,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1892 transitions. [2023-08-31 03:20:37,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:37,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1892 transitions. [2023-08-31 03:20:37,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.6) internal successors, (1892), 20 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:37,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:37,264 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:37,264 INFO L175 Difference]: Start difference. First operand has 98 places, 164 transitions, 1728 flow. Second operand 20 states and 1892 transitions. [2023-08-31 03:20:37,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 226 transitions, 2636 flow [2023-08-31 03:20:37,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 226 transitions, 2604 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-31 03:20:37,340 INFO L231 Difference]: Finished difference. Result has 123 places, 180 transitions, 2111 flow [2023-08-31 03:20:37,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2111, PETRI_PLACES=123, PETRI_TRANSITIONS=180} [2023-08-31 03:20:37,341 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-08-31 03:20:37,341 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 180 transitions, 2111 flow [2023-08-31 03:20:37,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.82758620689656) internal successors, (2663), 29 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:37,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:37,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:37,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:37,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 03:20:37,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:37,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2035982271, now seen corresponding path program 2 times [2023-08-31 03:20:37,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:37,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838807951] [2023-08-31 03:20:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:37,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:38,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:38,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838807951] [2023-08-31 03:20:38,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838807951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:38,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465780087] [2023-08-31 03:20:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:20:38,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:38,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:38,391 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) [2023-08-31 03:20:38,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:20:38,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:20:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-31 03:20:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:38,942 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 3 [2023-08-31 03:20:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:39,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:39,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:20:39,417 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 32 [2023-08-31 03:20:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:20:39,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465780087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:39,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:39,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-08-31 03:20:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598645836] [2023-08-31 03:20:39,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:39,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:20:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:39,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:20:39,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:20:41,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-31 03:20:41,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 180 transitions, 2111 flow. Second operand has 28 states, 28 states have (on average 91.89285714285714) internal successors, (2573), 28 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:41,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:41,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-31 03:20:41,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:42,143 INFO L130 PetriNetUnfolder]: 598/1158 cut-off events. [2023-08-31 03:20:42,144 INFO L131 PetriNetUnfolder]: For 9311/9311 co-relation queries the response was YES. [2023-08-31 03:20:42,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 1158 events. 598/1158 cut-off events. For 9311/9311 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6291 event pairs, 52 based on Foata normal form. 2/1160 useless extension candidates. Maximal degree in co-relation 6820. Up to 856 conditions per place. [2023-08-31 03:20:42,157 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 174 selfloop transitions, 76 changer transitions 6/256 dead transitions. [2023-08-31 03:20:42,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 256 transitions, 3098 flow [2023-08-31 03:20:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 03:20:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 03:20:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2001 transitions. [2023-08-31 03:20:42,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35160780179230366 [2023-08-31 03:20:42,163 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2001 transitions. [2023-08-31 03:20:42,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2001 transitions. [2023-08-31 03:20:42,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:42,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2001 transitions. [2023-08-31 03:20:42,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.28571428571429) internal successors, (2001), 21 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:42,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:42,175 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:42,175 INFO L175 Difference]: Start difference. First operand has 123 places, 180 transitions, 2111 flow. Second operand 21 states and 2001 transitions. [2023-08-31 03:20:42,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 256 transitions, 3098 flow [2023-08-31 03:20:42,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 256 transitions, 3019 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-31 03:20:42,225 INFO L231 Difference]: Finished difference. Result has 142 places, 202 transitions, 2525 flow [2023-08-31 03:20:42,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2525, PETRI_PLACES=142, PETRI_TRANSITIONS=202} [2023-08-31 03:20:42,226 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-08-31 03:20:42,227 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 202 transitions, 2525 flow [2023-08-31 03:20:42,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.89285714285714) internal successors, (2573), 28 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:42,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:42,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:42,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 03:20:42,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:42,434 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:42,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1472029166, now seen corresponding path program 5 times [2023-08-31 03:20:42,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:42,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032931037] [2023-08-31 03:20:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:43,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:43,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032931037] [2023-08-31 03:20:43,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032931037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:43,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289203704] [2023-08-31 03:20:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:20:43,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:43,166 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) [2023-08-31 03:20:43,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:20:43,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:20:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 03:20:43,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:43,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:20:43,436 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:20:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:43,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:43,495 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_332 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_332) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-08-31 03:20:43,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:20:43,511 INFO L350 Elim1Store]: Elim1 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 37 [2023-08-31 03:20:43,514 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:20:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:20:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289203704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:43,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:43,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-08-31 03:20:43,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54367382] [2023-08-31 03:20:43,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:43,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:20:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:20:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=360, Unknown=1, NotChecked=38, Total=462 [2023-08-31 03:20:43,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-08-31 03:20:43,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 202 transitions, 2525 flow. Second operand has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:43,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:43,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-08-31 03:20:43,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:44,918 INFO L130 PetriNetUnfolder]: 717/1365 cut-off events. [2023-08-31 03:20:44,919 INFO L131 PetriNetUnfolder]: For 14585/14585 co-relation queries the response was YES. [2023-08-31 03:20:44,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8683 conditions, 1365 events. 717/1365 cut-off events. For 14585/14585 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7598 event pairs, 56 based on Foata normal form. 16/1381 useless extension candidates. Maximal degree in co-relation 8632. Up to 417 conditions per place. [2023-08-31 03:20:44,936 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 155 selfloop transitions, 136 changer transitions 2/293 dead transitions. [2023-08-31 03:20:44,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 293 transitions, 4017 flow [2023-08-31 03:20:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:20:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:20:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1633 transitions. [2023-08-31 03:20:44,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31714896096329387 [2023-08-31 03:20:44,940 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1633 transitions. [2023-08-31 03:20:44,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1633 transitions. [2023-08-31 03:20:44,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:44,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1633 transitions. [2023-08-31 03:20:44,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.94736842105263) internal successors, (1633), 19 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:44,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:44,949 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:44,949 INFO L175 Difference]: Start difference. First operand has 142 places, 202 transitions, 2525 flow. Second operand 19 states and 1633 transitions. [2023-08-31 03:20:44,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 293 transitions, 4017 flow [2023-08-31 03:20:45,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 293 transitions, 3858 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-08-31 03:20:45,015 INFO L231 Difference]: Finished difference. Result has 154 places, 234 transitions, 3280 flow [2023-08-31 03:20:45,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3280, PETRI_PLACES=154, PETRI_TRANSITIONS=234} [2023-08-31 03:20:45,016 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2023-08-31 03:20:45,016 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 234 transitions, 3280 flow [2023-08-31 03:20:45,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:45,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:45,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:45,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:45,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:45,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:45,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 154671513, now seen corresponding path program 3 times [2023-08-31 03:20:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:45,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041110696] [2023-08-31 03:20:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:45,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041110696] [2023-08-31 03:20:45,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041110696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:45,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818858372] [2023-08-31 03:20:45,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:20:45,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:45,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:45,913 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) [2023-08-31 03:20:45,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:20:46,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:20:46,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 03:20:46,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:20:46,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:46,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:20:46,936 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 32 [2023-08-31 03:20:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:20:47,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818858372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:47,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:47,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-31 03:20:47,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516426440] [2023-08-31 03:20:47,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:20:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:20:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:20:48,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-31 03:20:48,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 234 transitions, 3280 flow. Second operand has 27 states, 27 states have (on average 91.96296296296296) internal successors, (2483), 27 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:48,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:48,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-31 03:20:48,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:49,267 INFO L130 PetriNetUnfolder]: 724/1390 cut-off events. [2023-08-31 03:20:49,267 INFO L131 PetriNetUnfolder]: For 16455/16455 co-relation queries the response was YES. [2023-08-31 03:20:49,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9474 conditions, 1390 events. 724/1390 cut-off events. For 16455/16455 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7851 event pairs, 169 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 9418. Up to 1206 conditions per place. [2023-08-31 03:20:49,285 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 201 selfloop transitions, 56 changer transitions 14/271 dead transitions. [2023-08-31 03:20:49,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 271 transitions, 4013 flow [2023-08-31 03:20:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 03:20:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 03:20:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1702 transitions. [2023-08-31 03:20:49,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34891348913489134 [2023-08-31 03:20:49,289 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1702 transitions. [2023-08-31 03:20:49,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1702 transitions. [2023-08-31 03:20:49,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:49,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1702 transitions. [2023-08-31 03:20:49,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.55555555555556) internal successors, (1702), 18 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:49,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:49,298 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:49,298 INFO L175 Difference]: Start difference. First operand has 154 places, 234 transitions, 3280 flow. Second operand 18 states and 1702 transitions. [2023-08-31 03:20:49,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 271 transitions, 4013 flow [2023-08-31 03:20:49,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 271 transitions, 3910 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-31 03:20:49,376 INFO L231 Difference]: Finished difference. Result has 165 places, 236 transitions, 3332 flow [2023-08-31 03:20:49,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3332, PETRI_PLACES=165, PETRI_TRANSITIONS=236} [2023-08-31 03:20:49,377 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2023-08-31 03:20:49,377 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 236 transitions, 3332 flow [2023-08-31 03:20:49,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 91.96296296296296) internal successors, (2483), 27 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:49,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:49,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:49,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 03:20:49,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 03:20:49,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:49,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1820848081, now seen corresponding path program 4 times [2023-08-31 03:20:49,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:49,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080721957] [2023-08-31 03:20:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:49,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:50,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080721957] [2023-08-31 03:20:50,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080721957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874619545] [2023-08-31 03:20:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:20:50,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:50,517 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) [2023-08-31 03:20:50,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:20:50,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:20:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 03:20:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:51,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:51,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:20:51,391 INFO L350 Elim1Store]: Elim1 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 34 [2023-08-31 03:20:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:51,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874619545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:51,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:51,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-31 03:20:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012830703] [2023-08-31 03:20:51,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:51,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 03:20:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 03:20:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 03:20:53,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 271 [2023-08-31 03:20:53,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 236 transitions, 3332 flow. Second operand has 33 states, 33 states have (on average 85.63636363636364) internal successors, (2826), 33 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:53,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:53,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 271 [2023-08-31 03:20:53,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:56,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:20:57,950 INFO L130 PetriNetUnfolder]: 853/1644 cut-off events. [2023-08-31 03:20:57,951 INFO L131 PetriNetUnfolder]: For 22584/22584 co-relation queries the response was YES. [2023-08-31 03:20:57,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1644 events. 853/1644 cut-off events. For 22584/22584 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9730 event pairs, 114 based on Foata normal form. 7/1651 useless extension candidates. Maximal degree in co-relation 11779. Up to 1253 conditions per place. [2023-08-31 03:20:57,968 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 242 selfloop transitions, 95 changer transitions 15/352 dead transitions. [2023-08-31 03:20:57,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 352 transitions, 5208 flow [2023-08-31 03:20:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:20:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:20:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2312 transitions. [2023-08-31 03:20:57,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32812943514050524 [2023-08-31 03:20:57,974 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2312 transitions. [2023-08-31 03:20:57,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2312 transitions. [2023-08-31 03:20:57,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:57,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2312 transitions. [2023-08-31 03:20:57,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.92307692307692) internal successors, (2312), 26 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:57,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:57,985 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:57,985 INFO L175 Difference]: Start difference. First operand has 165 places, 236 transitions, 3332 flow. Second operand 26 states and 2312 transitions. [2023-08-31 03:20:57,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 352 transitions, 5208 flow [2023-08-31 03:20:58,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 352 transitions, 5066 flow, removed 6 selfloop flow, removed 15 redundant places. [2023-08-31 03:20:58,101 INFO L231 Difference]: Finished difference. Result has 185 places, 286 transitions, 4391 flow [2023-08-31 03:20:58,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4391, PETRI_PLACES=185, PETRI_TRANSITIONS=286} [2023-08-31 03:20:58,102 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-08-31 03:20:58,102 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 286 transitions, 4391 flow [2023-08-31 03:20:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.63636363636364) internal successors, (2826), 33 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:58,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:58,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:58,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 03:20:58,310 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:58,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2088997291, now seen corresponding path program 5 times [2023-08-31 03:20:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:58,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586256270] [2023-08-31 03:20:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586256270] [2023-08-31 03:20:59,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586256270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448257800] [2023-08-31 03:20:59,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:20:59,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:59,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:59,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:20:59,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:20:59,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:20:59,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 03:20:59,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:20:59,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:59,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:20:59,674 INFO L350 Elim1Store]: Elim1 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 37 [2023-08-31 03:21:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:21:00,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448257800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:00,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:00,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-31 03:21:00,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794339896] [2023-08-31 03:21:00,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:00,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:21:00,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:21:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:21:01,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-08-31 03:21:01,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 286 transitions, 4391 flow. Second operand has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:01,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:01,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-08-31 03:21:01,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:03,154 INFO L130 PetriNetUnfolder]: 842/1620 cut-off events. [2023-08-31 03:21:03,155 INFO L131 PetriNetUnfolder]: For 21513/21513 co-relation queries the response was YES. [2023-08-31 03:21:03,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 1620 events. 842/1620 cut-off events. For 21513/21513 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9571 event pairs, 122 based on Foata normal form. 2/1622 useless extension candidates. Maximal degree in co-relation 11986. Up to 927 conditions per place. [2023-08-31 03:21:03,171 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 215 selfloop transitions, 100 changer transitions 15/330 dead transitions. [2023-08-31 03:21:03,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 330 transitions, 5409 flow [2023-08-31 03:21:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:21:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:21:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1858 transitions. [2023-08-31 03:21:03,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34280442804428046 [2023-08-31 03:21:03,177 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1858 transitions. [2023-08-31 03:21:03,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1858 transitions. [2023-08-31 03:21:03,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:03,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1858 transitions. [2023-08-31 03:21:03,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 92.9) internal successors, (1858), 20 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:03,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:03,186 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:03,186 INFO L175 Difference]: Start difference. First operand has 185 places, 286 transitions, 4391 flow. Second operand 20 states and 1858 transitions. [2023-08-31 03:21:03,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 330 transitions, 5409 flow [2023-08-31 03:21:03,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 330 transitions, 5217 flow, removed 73 selfloop flow, removed 11 redundant places. [2023-08-31 03:21:03,310 INFO L231 Difference]: Finished difference. Result has 195 places, 288 transitions, 4446 flow [2023-08-31 03:21:03,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4446, PETRI_PLACES=195, PETRI_TRANSITIONS=288} [2023-08-31 03:21:03,311 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-08-31 03:21:03,311 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 288 transitions, 4446 flow [2023-08-31 03:21:03,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:03,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:03,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:03,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:21:03,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 03:21:03,517 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:21:03,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -348873531, now seen corresponding path program 6 times [2023-08-31 03:21:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:03,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056013720] [2023-08-31 03:21:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:03,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:04,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:04,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056013720] [2023-08-31 03:21:04,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056013720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:04,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047496310] [2023-08-31 03:21:04,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:21:04,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:04,613 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:21:04,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:21:05,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:21:05,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:21:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-31 03:21:05,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:05,300 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:21:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:21:05,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:05,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:05,822 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 51 [2023-08-31 03:21:05,827 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 32 [2023-08-31 03:21:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:21:06,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047496310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:06,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:06,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 30 [2023-08-31 03:21:06,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833128872] [2023-08-31 03:21:06,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:06,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 03:21:06,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:06,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 03:21:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=902, Unknown=2, NotChecked=0, Total=992 [2023-08-31 03:21:08,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:10,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:12,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:14,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:16,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:17,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-31 03:21:17,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 288 transitions, 4446 flow. Second operand has 32 states, 32 states have (on average 69.65625) internal successors, (2229), 32 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:17,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:17,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-31 03:21:17,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:19,375 INFO L130 PetriNetUnfolder]: 855/1645 cut-off events. [2023-08-31 03:21:19,375 INFO L131 PetriNetUnfolder]: For 26143/26143 co-relation queries the response was YES. [2023-08-31 03:21:19,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12289 conditions, 1645 events. 855/1645 cut-off events. For 26143/26143 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9772 event pairs, 102 based on Foata normal form. 2/1647 useless extension candidates. Maximal degree in co-relation 12215. Up to 887 conditions per place. [2023-08-31 03:21:19,393 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 202 selfloop transitions, 139 changer transitions 7/348 dead transitions. [2023-08-31 03:21:19,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 348 transitions, 5735 flow [2023-08-31 03:21:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:21:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:21:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1452 transitions. [2023-08-31 03:21:19,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26789667896678965 [2023-08-31 03:21:19,397 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1452 transitions. [2023-08-31 03:21:19,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1452 transitions. [2023-08-31 03:21:19,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:19,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1452 transitions. [2023-08-31 03:21:19,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.6) internal successors, (1452), 20 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:19,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:19,403 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:19,403 INFO L175 Difference]: Start difference. First operand has 195 places, 288 transitions, 4446 flow. Second operand 20 states and 1452 transitions. [2023-08-31 03:21:19,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 348 transitions, 5735 flow [2023-08-31 03:21:19,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 348 transitions, 5673 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-08-31 03:21:19,514 INFO L231 Difference]: Finished difference. Result has 205 places, 302 transitions, 4984 flow [2023-08-31 03:21:19,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4984, PETRI_PLACES=205, PETRI_TRANSITIONS=302} [2023-08-31 03:21:19,515 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-08-31 03:21:19,515 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 302 transitions, 4984 flow [2023-08-31 03:21:19,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 69.65625) internal successors, (2229), 32 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:19,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:19,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:19,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 03:21:19,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:21:19,722 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:21:19,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2032706171, now seen corresponding path program 7 times [2023-08-31 03:21:19,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:19,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395841631] [2023-08-31 03:21:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395841631] [2023-08-31 03:21:20,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395841631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401913671] [2023-08-31 03:21:20,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:21:20,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:20,491 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:21:20,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:21:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-31 03:21:20,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:20,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:20,865 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:21:21,057 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:21:21,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:21,060 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 10 [2023-08-31 03:21:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:21,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:21,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:21,489 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 51 [2023-08-31 03:21:21,493 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 32 [2023-08-31 03:21:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:21,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401913671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:21,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:21,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-31 03:21:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591306052] [2023-08-31 03:21:21,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:21,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 03:21:21,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 03:21:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=921, Unknown=5, NotChecked=0, Total=1056 [2023-08-31 03:21:24,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:26,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:27,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-08-31 03:21:27,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 302 transitions, 4984 flow. Second operand has 33 states, 33 states have (on average 72.57575757575758) internal successors, (2395), 33 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:27,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:27,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-08-31 03:21:27,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:35,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:37,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:40,163 INFO L130 PetriNetUnfolder]: 1017/2009 cut-off events. [2023-08-31 03:21:40,163 INFO L131 PetriNetUnfolder]: For 40551/40551 co-relation queries the response was YES. [2023-08-31 03:21:40,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15844 conditions, 2009 events. 1017/2009 cut-off events. For 40551/40551 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13066 event pairs, 57 based on Foata normal form. 5/2014 useless extension candidates. Maximal degree in co-relation 15765. Up to 646 conditions per place. [2023-08-31 03:21:40,181 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 213 selfloop transitions, 220 changer transitions 16/449 dead transitions. [2023-08-31 03:21:40,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 449 transitions, 7320 flow [2023-08-31 03:21:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 03:21:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 03:21:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2373 transitions. [2023-08-31 03:21:40,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824663730508273 [2023-08-31 03:21:40,193 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2373 transitions. [2023-08-31 03:21:40,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2373 transitions. [2023-08-31 03:21:40,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:21:40,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2373 transitions. [2023-08-31 03:21:40,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 76.54838709677419) internal successors, (2373), 31 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:40,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:40,209 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:40,210 INFO L175 Difference]: Start difference. First operand has 205 places, 302 transitions, 4984 flow. Second operand 31 states and 2373 transitions. [2023-08-31 03:21:40,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 449 transitions, 7320 flow [2023-08-31 03:21:40,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 449 transitions, 7063 flow, removed 56 selfloop flow, removed 11 redundant places. [2023-08-31 03:21:40,429 INFO L231 Difference]: Finished difference. Result has 235 places, 344 transitions, 6044 flow [2023-08-31 03:21:40,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6044, PETRI_PLACES=235, PETRI_TRANSITIONS=344} [2023-08-31 03:21:40,430 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-08-31 03:21:40,430 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 344 transitions, 6044 flow [2023-08-31 03:21:40,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.57575757575758) internal successors, (2395), 33 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:40,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:40,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:40,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 03:21:40,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 03:21:40,637 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:21:40,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 151395413, now seen corresponding path program 8 times [2023-08-31 03:21:40,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:40,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960204747] [2023-08-31 03:21:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:40,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:41,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960204747] [2023-08-31 03:21:41,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960204747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969831265] [2023-08-31 03:21:41,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:21:41,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:41,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:41,432 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:21:41,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:21:41,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:21:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:21:41,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 70 conjunts are in the unsatisfiable core [2023-08-31 03:21:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:41,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:21:41,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:21:41,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:21:41,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:21:41,948 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:21:42,106 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 3 [2023-08-31 03:21:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:42,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:43,311 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-08-31 03:21:43,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 221 [2023-08-31 03:21:43,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 339 treesize of output 324 [2023-08-31 03:21:43,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:43,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 254 [2023-08-31 03:21:43,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:43,398 INFO L350 Elim1Store]: Elim1 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 220 treesize of output 217 [2023-08-31 03:21:43,412 INFO L350 Elim1Store]: Elim1 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 208 treesize of output 196 [2023-08-31 03:21:43,423 INFO L350 Elim1Store]: Elim1 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 196 treesize of output 184 [2023-08-31 03:21:43,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:43,441 INFO L350 Elim1Store]: Elim1 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 184 treesize of output 181 [2023-08-31 03:21:43,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:43,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 194 [2023-08-31 03:21:43,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:21:43,501 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 187 [2023-08-31 03:21:43,516 INFO L350 Elim1Store]: Elim1 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 169 treesize of output 163 [2023-08-31 03:21:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:44,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969831265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:21:44,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:21:44,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-31 03:21:44,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547717843] [2023-08-31 03:21:44,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:21:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 03:21:44,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:21:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 03:21:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=980, Unknown=5, NotChecked=0, Total=1122 [2023-08-31 03:21:47,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:21:47,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-31 03:21:47,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 344 transitions, 6044 flow. Second operand has 34 states, 34 states have (on average 69.47058823529412) internal successors, (2362), 34 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:47,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:21:47,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-31 03:21:47,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:21:59,167 WARN L222 SmtUtils]: Spent 10.12s on a formula simplification. DAG size of input: 45 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:22:06,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:07,485 INFO L130 PetriNetUnfolder]: 1091/2152 cut-off events. [2023-08-31 03:22:07,485 INFO L131 PetriNetUnfolder]: For 52247/52247 co-relation queries the response was YES. [2023-08-31 03:22:07,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18388 conditions, 2152 events. 1091/2152 cut-off events. For 52247/52247 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14133 event pairs, 79 based on Foata normal form. 31/2183 useless extension candidates. Maximal degree in co-relation 18298. Up to 893 conditions per place. [2023-08-31 03:22:07,506 INFO L137 encePairwiseOnDemand]: 258/271 looper letters, 209 selfloop transitions, 260 changer transitions 35/504 dead transitions. [2023-08-31 03:22:07,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 504 transitions, 8943 flow [2023-08-31 03:22:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 03:22:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 03:22:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2997 transitions. [2023-08-31 03:22:07,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26973269732697325 [2023-08-31 03:22:07,512 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2997 transitions. [2023-08-31 03:22:07,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2997 transitions. [2023-08-31 03:22:07,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:07,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2997 transitions. [2023-08-31 03:22:07,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 73.09756097560975) internal successors, (2997), 41 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:07,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:07,529 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:07,529 INFO L175 Difference]: Start difference. First operand has 235 places, 344 transitions, 6044 flow. Second operand 41 states and 2997 transitions. [2023-08-31 03:22:07,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 504 transitions, 8943 flow [2023-08-31 03:22:07,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 504 transitions, 8619 flow, removed 118 selfloop flow, removed 17 redundant places. [2023-08-31 03:22:07,799 INFO L231 Difference]: Finished difference. Result has 269 places, 393 transitions, 7663 flow [2023-08-31 03:22:07,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5378, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7663, PETRI_PLACES=269, PETRI_TRANSITIONS=393} [2023-08-31 03:22:07,800 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 248 predicate places. [2023-08-31 03:22:07,800 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 393 transitions, 7663 flow [2023-08-31 03:22:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.47058823529412) internal successors, (2362), 34 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:07,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:07,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:07,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:08,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:08,005 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:08,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:08,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1739213093, now seen corresponding path program 9 times [2023-08-31 03:22:08,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669372860] [2023-08-31 03:22:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:08,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:08,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:08,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669372860] [2023-08-31 03:22:08,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669372860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:08,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735057767] [2023-08-31 03:22:08,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:22:08,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:08,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:08,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:08,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:22:09,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:22:09,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:09,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-31 03:22:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:22:09,792 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-08-31 03:22:10,040 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 3 [2023-08-31 03:22:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:10,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:10,472 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 1))) (or (< .cse0 0) (<= c_~n~0 .cse0) (< c_~q_back~0 0) (and (forall ((v_ArrVal_579 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_579) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)))) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) (mod (+ c_~C~0 c_~x~0) 4294967296))) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2023-08-31 03:22:10,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:10,506 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 51 [2023-08-31 03:22:10,512 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 32 [2023-08-31 03:22:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-31 03:22:11,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735057767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:11,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:11,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-31 03:22:11,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377556450] [2023-08-31 03:22:11,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:11,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:22:11,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:22:11,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=938, Unknown=5, NotChecked=64, Total=1190 [2023-08-31 03:22:11,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-08-31 03:22:11,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 393 transitions, 7663 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:11,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:11,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-08-31 03:22:11,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:17,581 INFO L130 PetriNetUnfolder]: 1243/2461 cut-off events. [2023-08-31 03:22:17,581 INFO L131 PetriNetUnfolder]: For 65227/65227 co-relation queries the response was YES. [2023-08-31 03:22:17,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22716 conditions, 2461 events. 1243/2461 cut-off events. For 65227/65227 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16635 event pairs, 162 based on Foata normal form. 7/2468 useless extension candidates. Maximal degree in co-relation 22612. Up to 1677 conditions per place. [2023-08-31 03:22:17,607 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 343 selfloop transitions, 199 changer transitions 42/584 dead transitions. [2023-08-31 03:22:17,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 584 transitions, 11644 flow [2023-08-31 03:22:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:22:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:22:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2514 transitions. [2023-08-31 03:22:17,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2811137202281114 [2023-08-31 03:22:17,612 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2514 transitions. [2023-08-31 03:22:17,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2514 transitions. [2023-08-31 03:22:17,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:17,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2514 transitions. [2023-08-31 03:22:17,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 76.18181818181819) internal successors, (2514), 33 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:17,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:17,623 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:17,623 INFO L175 Difference]: Start difference. First operand has 269 places, 393 transitions, 7663 flow. Second operand 33 states and 2514 transitions. [2023-08-31 03:22:17,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 584 transitions, 11644 flow [2023-08-31 03:22:17,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 584 transitions, 10745 flow, removed 412 selfloop flow, removed 18 redundant places. [2023-08-31 03:22:17,980 INFO L231 Difference]: Finished difference. Result has 294 places, 492 transitions, 9758 flow [2023-08-31 03:22:17,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9758, PETRI_PLACES=294, PETRI_TRANSITIONS=492} [2023-08-31 03:22:17,980 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-08-31 03:22:17,980 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 492 transitions, 9758 flow [2023-08-31 03:22:17,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:17,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:17,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:17,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-31 03:22:18,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:18,181 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:18,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash -890919087, now seen corresponding path program 10 times [2023-08-31 03:22:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:18,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595020745] [2023-08-31 03:22:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:18,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:18,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:18,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595020745] [2023-08-31 03:22:18,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595020745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:18,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401192145] [2023-08-31 03:22:18,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:22:18,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:18,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:18,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:22:18,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:22:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-31 03:22:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:19,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-31 03:22:19,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:22:19,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:22:19,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:22:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:19,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:20,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:20,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 61 [2023-08-31 03:22:20,510 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:22:20,510 INFO L350 Elim1Store]: Elim1 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 300 treesize of output 271 [2023-08-31 03:22:20,521 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:22:20,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-08-31 03:22:20,534 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 03:22:20,534 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 67 [2023-08-31 03:22:20,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:20,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2023-08-31 03:22:20,557 INFO L350 Elim1Store]: Elim1 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 154 treesize of output 138 [2023-08-31 03:22:20,563 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 4 [2023-08-31 03:22:20,567 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 4 [2023-08-31 03:22:20,574 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 4 [2023-08-31 03:22:20,581 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-08-31 03:22:20,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 1 [2023-08-31 03:22:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:20,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401192145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:20,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:20,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-31 03:22:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480671632] [2023-08-31 03:22:20,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 03:22:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 03:22:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=955, Unknown=8, NotChecked=0, Total=1122 [2023-08-31 03:22:21,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-31 03:22:21,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 492 transitions, 9758 flow. Second operand has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:21,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:21,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-31 03:22:21,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:26,415 INFO L130 PetriNetUnfolder]: 1277/2513 cut-off events. [2023-08-31 03:22:26,415 INFO L131 PetriNetUnfolder]: For 48594/48594 co-relation queries the response was YES. [2023-08-31 03:22:26,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23684 conditions, 2513 events. 1277/2513 cut-off events. For 48594/48594 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17069 event pairs, 76 based on Foata normal form. 2/2513 useless extension candidates. Maximal degree in co-relation 23571. Up to 1640 conditions per place. [2023-08-31 03:22:26,444 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 323 selfloop transitions, 277 changer transitions 11/611 dead transitions. [2023-08-31 03:22:26,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 611 transitions, 12840 flow [2023-08-31 03:22:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 03:22:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 03:22:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2321 transitions. [2023-08-31 03:22:26,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2676429889298893 [2023-08-31 03:22:26,448 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2321 transitions. [2023-08-31 03:22:26,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2321 transitions. [2023-08-31 03:22:26,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:26,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2321 transitions. [2023-08-31 03:22:26,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 72.53125) internal successors, (2321), 32 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:26,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:26,457 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:26,457 INFO L175 Difference]: Start difference. First operand has 294 places, 492 transitions, 9758 flow. Second operand 32 states and 2321 transitions. [2023-08-31 03:22:26,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 611 transitions, 12840 flow [2023-08-31 03:22:26,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 611 transitions, 12535 flow, removed 109 selfloop flow, removed 22 redundant places. [2023-08-31 03:22:26,730 INFO L231 Difference]: Finished difference. Result has 301 places, 547 transitions, 11660 flow [2023-08-31 03:22:26,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9515, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11660, PETRI_PLACES=301, PETRI_TRANSITIONS=547} [2023-08-31 03:22:26,731 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2023-08-31 03:22:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 547 transitions, 11660 flow [2023-08-31 03:22:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:26,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:26,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:26,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:26,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:26,932 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:26,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -451798573, now seen corresponding path program 11 times [2023-08-31 03:22:26,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:26,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880362702] [2023-08-31 03:22:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880362702] [2023-08-31 03:22:27,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880362702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16208243] [2023-08-31 03:22:27,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:22:27,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:27,573 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:27,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:22:28,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:22:28,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 03:22:28,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:22:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:28,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:28,572 INFO L350 Elim1Store]: Elim1 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 37 [2023-08-31 03:22:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:22:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16208243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:28,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-31 03:22:28,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691353542] [2023-08-31 03:22:28,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:22:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:22:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:22:30,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-31 03:22:30,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 547 transitions, 11660 flow. Second operand has 28 states, 28 states have (on average 91.85714285714286) internal successors, (2572), 28 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:30,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:30,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-31 03:22:30,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:31,583 INFO L130 PetriNetUnfolder]: 1275/2503 cut-off events. [2023-08-31 03:22:31,583 INFO L131 PetriNetUnfolder]: For 53104/53104 co-relation queries the response was YES. [2023-08-31 03:22:31,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 2503 events. 1275/2503 cut-off events. For 53104/53104 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16872 event pairs, 127 based on Foata normal form. 2/2503 useless extension candidates. Maximal degree in co-relation 24170. Up to 1170 conditions per place. [2023-08-31 03:22:31,608 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 408 selfloop transitions, 175 changer transitions 14/597 dead transitions. [2023-08-31 03:22:31,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 597 transitions, 13375 flow [2023-08-31 03:22:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 03:22:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 03:22:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2164 transitions. [2023-08-31 03:22:31,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34718434140863147 [2023-08-31 03:22:31,611 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2164 transitions. [2023-08-31 03:22:31,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2164 transitions. [2023-08-31 03:22:31,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:31,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2164 transitions. [2023-08-31 03:22:31,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 94.08695652173913) internal successors, (2164), 23 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:31,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:31,619 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:31,619 INFO L175 Difference]: Start difference. First operand has 301 places, 547 transitions, 11660 flow. Second operand 23 states and 2164 transitions. [2023-08-31 03:22:31,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 597 transitions, 13375 flow [2023-08-31 03:22:31,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 597 transitions, 13171 flow, removed 69 selfloop flow, removed 18 redundant places. [2023-08-31 03:22:31,986 INFO L231 Difference]: Finished difference. Result has 305 places, 547 transitions, 11911 flow [2023-08-31 03:22:31,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11911, PETRI_PLACES=305, PETRI_TRANSITIONS=547} [2023-08-31 03:22:31,986 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-08-31 03:22:31,986 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 547 transitions, 11911 flow [2023-08-31 03:22:31,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.85714285714286) internal successors, (2572), 28 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:31,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:31,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:31,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:32,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 03:22:32,187 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:32,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1660800894, now seen corresponding path program 12 times [2023-08-31 03:22:32,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:32,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420869166] [2023-08-31 03:22:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:32,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:22:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420869166] [2023-08-31 03:22:32,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420869166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124191262] [2023-08-31 03:22:32,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:22:32,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:32,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:32,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:22:32,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:22:32,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:22:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:22:32,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:22:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124191262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:32,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:32,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:22:32,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371315455] [2023-08-31 03:22:32,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:32,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:22:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:22:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:22:32,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 271 [2023-08-31 03:22:32,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 547 transitions, 11911 flow. Second operand has 18 states, 18 states have (on average 114.11111111111111) internal successors, (2054), 18 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:32,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:32,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 271 [2023-08-31 03:22:32,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:33,317 INFO L130 PetriNetUnfolder]: 656/1362 cut-off events. [2023-08-31 03:22:33,317 INFO L131 PetriNetUnfolder]: For 36525/36538 co-relation queries the response was YES. [2023-08-31 03:22:33,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13583 conditions, 1362 events. 656/1362 cut-off events. For 36525/36538 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8446 event pairs, 220 based on Foata normal form. 116/1475 useless extension candidates. Maximal degree in co-relation 13478. Up to 1014 conditions per place. [2023-08-31 03:22:33,332 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 253 selfloop transitions, 12 changer transitions 49/324 dead transitions. [2023-08-31 03:22:33,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 324 transitions, 7601 flow [2023-08-31 03:22:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:22:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:22:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 941 transitions. [2023-08-31 03:22:33,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43404059040590404 [2023-08-31 03:22:33,333 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 941 transitions. [2023-08-31 03:22:33,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 941 transitions. [2023-08-31 03:22:33,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:33,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 941 transitions. [2023-08-31 03:22:33,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.625) internal successors, (941), 8 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:33,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:33,336 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:33,336 INFO L175 Difference]: Start difference. First operand has 305 places, 547 transitions, 11911 flow. Second operand 8 states and 941 transitions. [2023-08-31 03:22:33,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 324 transitions, 7601 flow [2023-08-31 03:22:33,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 324 transitions, 6779 flow, removed 107 selfloop flow, removed 44 redundant places. [2023-08-31 03:22:33,457 INFO L231 Difference]: Finished difference. Result has 246 places, 266 transitions, 5225 flow [2023-08-31 03:22:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6066, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5225, PETRI_PLACES=246, PETRI_TRANSITIONS=266} [2023-08-31 03:22:33,458 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-08-31 03:22:33,458 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 266 transitions, 5225 flow [2023-08-31 03:22:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.11111111111111) internal successors, (2054), 18 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:33,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:33,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:33,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:33,659 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:33,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1511247871, now seen corresponding path program 13 times [2023-08-31 03:22:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:33,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994392205] [2023-08-31 03:22:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:33,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:33,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994392205] [2023-08-31 03:22:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994392205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230766090] [2023-08-31 03:22:33,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:22:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:33,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:33,817 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:33,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:22:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:22:33,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:22:33,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:22:34,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230766090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:34,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:34,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 18 [2023-08-31 03:22:34,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930423589] [2023-08-31 03:22:34,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:34,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:22:34,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:22:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:22:34,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2023-08-31 03:22:34,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 266 transitions, 5225 flow. Second operand has 19 states, 19 states have (on average 112.6842105263158) internal successors, (2141), 19 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:34,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:34,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2023-08-31 03:22:34,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:34,713 INFO L130 PetriNetUnfolder]: 902/1798 cut-off events. [2023-08-31 03:22:34,713 INFO L131 PetriNetUnfolder]: For 37232/37237 co-relation queries the response was YES. [2023-08-31 03:22:34,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16092 conditions, 1798 events. 902/1798 cut-off events. For 37232/37237 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11422 event pairs, 105 based on Foata normal form. 36/1831 useless extension candidates. Maximal degree in co-relation 16009. Up to 504 conditions per place. [2023-08-31 03:22:34,727 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 113 selfloop transitions, 147 changer transitions 108/376 dead transitions. [2023-08-31 03:22:34,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 376 transitions, 7600 flow [2023-08-31 03:22:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 03:22:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 03:22:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1631 transitions. [2023-08-31 03:22:34,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42988929889298894 [2023-08-31 03:22:34,735 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1631 transitions. [2023-08-31 03:22:34,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1631 transitions. [2023-08-31 03:22:34,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:34,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1631 transitions. [2023-08-31 03:22:34,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.5) internal successors, (1631), 14 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:34,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:34,740 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:34,740 INFO L175 Difference]: Start difference. First operand has 246 places, 266 transitions, 5225 flow. Second operand 14 states and 1631 transitions. [2023-08-31 03:22:34,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 376 transitions, 7600 flow [2023-08-31 03:22:34,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 376 transitions, 7323 flow, removed 44 selfloop flow, removed 27 redundant places. [2023-08-31 03:22:34,847 INFO L231 Difference]: Finished difference. Result has 221 places, 235 transitions, 4863 flow [2023-08-31 03:22:34,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4879, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4863, PETRI_PLACES=221, PETRI_TRANSITIONS=235} [2023-08-31 03:22:34,848 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2023-08-31 03:22:34,848 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 235 transitions, 4863 flow [2023-08-31 03:22:34,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 112.6842105263158) internal successors, (2141), 19 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:34,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:34,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:34,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:35,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:35,050 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:35,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1837096140, now seen corresponding path program 14 times [2023-08-31 03:22:35,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:35,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417656959] [2023-08-31 03:22:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:35,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417656959] [2023-08-31 03:22:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417656959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959386026] [2023-08-31 03:22:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:22:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:35,461 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:35,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:22:35,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:22:35,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:22:35,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:35,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:35,999 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:22:35,999 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-08-31 03:22:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:36,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959386026] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:36,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:36,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-08-31 03:22:36,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738698338] [2023-08-31 03:22:36,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:36,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:22:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:22:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2023-08-31 03:22:37,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 271 [2023-08-31 03:22:37,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 235 transitions, 4863 flow. Second operand has 31 states, 31 states have (on average 100.80645161290323) internal successors, (3125), 31 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:37,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:37,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 271 [2023-08-31 03:22:37,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:39,188 INFO L130 PetriNetUnfolder]: 1227/2388 cut-off events. [2023-08-31 03:22:39,188 INFO L131 PetriNetUnfolder]: For 67321/67321 co-relation queries the response was YES. [2023-08-31 03:22:39,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22634 conditions, 2388 events. 1227/2388 cut-off events. For 67321/67321 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15406 event pairs, 147 based on Foata normal form. 100/2488 useless extension candidates. Maximal degree in co-relation 22559. Up to 863 conditions per place. [2023-08-31 03:22:39,208 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 275 selfloop transitions, 275 changer transitions 0/550 dead transitions. [2023-08-31 03:22:39,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 550 transitions, 11325 flow [2023-08-31 03:22:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:22:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:22:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3486 transitions. [2023-08-31 03:22:39,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898020798389802 [2023-08-31 03:22:39,211 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3486 transitions. [2023-08-31 03:22:39,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3486 transitions. [2023-08-31 03:22:39,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:39,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3486 transitions. [2023-08-31 03:22:39,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 105.63636363636364) internal successors, (3486), 33 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:39,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:39,219 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:39,219 INFO L175 Difference]: Start difference. First operand has 221 places, 235 transitions, 4863 flow. Second operand 33 states and 3486 transitions. [2023-08-31 03:22:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 550 transitions, 11325 flow [2023-08-31 03:22:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 550 transitions, 9356 flow, removed 853 selfloop flow, removed 25 redundant places. [2023-08-31 03:22:39,417 INFO L231 Difference]: Finished difference. Result has 194 places, 430 transitions, 8393 flow [2023-08-31 03:22:39,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8393, PETRI_PLACES=194, PETRI_TRANSITIONS=430} [2023-08-31 03:22:39,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 173 predicate places. [2023-08-31 03:22:39,418 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 430 transitions, 8393 flow [2023-08-31 03:22:39,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 100.80645161290323) internal successors, (3125), 31 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:39,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:39,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:39,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:39,625 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:39,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1540184836, now seen corresponding path program 15 times [2023-08-31 03:22:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:39,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521933051] [2023-08-31 03:22:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:39,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:40,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:40,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521933051] [2023-08-31 03:22:40,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521933051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:40,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353872233] [2023-08-31 03:22:40,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:22:40,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:40,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:40,028 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:40,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:22:40,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:22:40,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 03:22:40,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:22:40,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:40,539 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:22:40,539 INFO L350 Elim1Store]: Elim1 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 12 [2023-08-31 03:22:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:22:40,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353872233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:40,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:40,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2023-08-31 03:22:40,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461408609] [2023-08-31 03:22:40,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:40,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:22:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:22:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:22:41,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-08-31 03:22:41,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 430 transitions, 8393 flow. Second operand has 19 states, 19 states have (on average 108.3157894736842) internal successors, (2058), 19 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:41,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:41,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-08-31 03:22:41,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:42,397 INFO L130 PetriNetUnfolder]: 1466/2731 cut-off events. [2023-08-31 03:22:42,397 INFO L131 PetriNetUnfolder]: For 54930/54932 co-relation queries the response was YES. [2023-08-31 03:22:42,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23925 conditions, 2731 events. 1466/2731 cut-off events. For 54930/54932 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17187 event pairs, 312 based on Foata normal form. 88/2818 useless extension candidates. Maximal degree in co-relation 23856. Up to 1782 conditions per place. [2023-08-31 03:22:42,420 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 409 selfloop transitions, 222 changer transitions 0/639 dead transitions. [2023-08-31 03:22:42,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 639 transitions, 12755 flow [2023-08-31 03:22:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:22:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:22:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3127 transitions. [2023-08-31 03:22:42,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4120980495519241 [2023-08-31 03:22:42,423 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3127 transitions. [2023-08-31 03:22:42,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3127 transitions. [2023-08-31 03:22:42,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:42,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3127 transitions. [2023-08-31 03:22:42,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 111.67857142857143) internal successors, (3127), 28 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:42,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:42,432 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:42,432 INFO L175 Difference]: Start difference. First operand has 194 places, 430 transitions, 8393 flow. Second operand 28 states and 3127 transitions. [2023-08-31 03:22:42,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 639 transitions, 12755 flow [2023-08-31 03:22:42,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 639 transitions, 11498 flow, removed 564 selfloop flow, removed 9 redundant places. [2023-08-31 03:22:42,644 INFO L231 Difference]: Finished difference. Result has 222 places, 501 transitions, 9948 flow [2023-08-31 03:22:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9948, PETRI_PLACES=222, PETRI_TRANSITIONS=501} [2023-08-31 03:22:42,645 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 201 predicate places. [2023-08-31 03:22:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 501 transitions, 9948 flow [2023-08-31 03:22:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.3157894736842) internal successors, (2058), 19 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:42,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:42,646 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:42,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 03:22:42,851 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:42,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash 675593852, now seen corresponding path program 16 times [2023-08-31 03:22:42,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:42,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192623924] [2023-08-31 03:22:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:42,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:43,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:43,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192623924] [2023-08-31 03:22:43,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192623924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:43,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050211484] [2023-08-31 03:22:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:22:43,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:43,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:43,441 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:43,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:22:43,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:22:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 03:22:43,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:22:43,822 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:22:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:43,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:44,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:44,052 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-08-31 03:22:44,055 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 18 [2023-08-31 03:22:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:44,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050211484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:44,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:44,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2023-08-31 03:22:44,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495115150] [2023-08-31 03:22:44,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:44,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 03:22:44,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:44,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 03:22:44,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=909, Unknown=7, NotChecked=0, Total=1056 [2023-08-31 03:22:45,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-08-31 03:22:45,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 501 transitions, 9948 flow. Second operand has 33 states, 33 states have (on average 82.6969696969697) internal successors, (2729), 33 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:45,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:45,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-08-31 03:22:45,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:48,291 INFO L130 PetriNetUnfolder]: 1784/3344 cut-off events. [2023-08-31 03:22:48,291 INFO L131 PetriNetUnfolder]: For 70954/70954 co-relation queries the response was YES. [2023-08-31 03:22:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28264 conditions, 3344 events. 1784/3344 cut-off events. For 70954/70954 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21669 event pairs, 250 based on Foata normal form. 102/3446 useless extension candidates. Maximal degree in co-relation 28187. Up to 1045 conditions per place. [2023-08-31 03:22:48,320 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 383 selfloop transitions, 348 changer transitions 0/731 dead transitions. [2023-08-31 03:22:48,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 731 transitions, 14768 flow [2023-08-31 03:22:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:22:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:22:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2448 transitions. [2023-08-31 03:22:48,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32261465471797574 [2023-08-31 03:22:48,327 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2448 transitions. [2023-08-31 03:22:48,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2448 transitions. [2023-08-31 03:22:48,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:48,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2448 transitions. [2023-08-31 03:22:48,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 87.42857142857143) internal successors, (2448), 28 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:48,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:48,335 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:48,335 INFO L175 Difference]: Start difference. First operand has 222 places, 501 transitions, 9948 flow. Second operand 28 states and 2448 transitions. [2023-08-31 03:22:48,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 731 transitions, 14768 flow [2023-08-31 03:22:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 731 transitions, 14408 flow, removed 118 selfloop flow, removed 12 redundant places. [2023-08-31 03:22:48,597 INFO L231 Difference]: Finished difference. Result has 248 places, 611 transitions, 12590 flow [2023-08-31 03:22:48,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9630, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12590, PETRI_PLACES=248, PETRI_TRANSITIONS=611} [2023-08-31 03:22:48,598 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2023-08-31 03:22:48,598 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 611 transitions, 12590 flow [2023-08-31 03:22:48,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 82.6969696969697) internal successors, (2729), 33 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:48,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:48,599 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:48,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:48,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 03:22:48,799 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:48,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -377762370, now seen corresponding path program 17 times [2023-08-31 03:22:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256492192] [2023-08-31 03:22:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:49,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256492192] [2023-08-31 03:22:49,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256492192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258768514] [2023-08-31 03:22:49,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:22:49,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:49,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:49,150 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:49,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:22:49,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:22:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:49,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:22:49,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:22:49,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:49,402 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:22:49,403 INFO L350 Elim1Store]: Elim1 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 12 [2023-08-31 03:22:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:22:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258768514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:49,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:49,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 21 [2023-08-31 03:22:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707542258] [2023-08-31 03:22:49,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:49,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:22:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:22:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:22:49,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 271 [2023-08-31 03:22:49,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 611 transitions, 12590 flow. Second operand has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:49,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:49,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 271 [2023-08-31 03:22:49,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:51,558 INFO L130 PetriNetUnfolder]: 1954/3612 cut-off events. [2023-08-31 03:22:51,558 INFO L131 PetriNetUnfolder]: For 83377/83377 co-relation queries the response was YES. [2023-08-31 03:22:51,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32475 conditions, 3612 events. 1954/3612 cut-off events. For 83377/83377 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23720 event pairs, 163 based on Foata normal form. 82/3694 useless extension candidates. Maximal degree in co-relation 32389. Up to 1026 conditions per place. [2023-08-31 03:22:51,588 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 349 selfloop transitions, 494 changer transitions 0/843 dead transitions. [2023-08-31 03:22:51,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 843 transitions, 18165 flow [2023-08-31 03:22:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:22:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:22:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3475 transitions. [2023-08-31 03:22:51,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3885720675388572 [2023-08-31 03:22:51,593 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3475 transitions. [2023-08-31 03:22:51,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3475 transitions. [2023-08-31 03:22:51,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:51,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3475 transitions. [2023-08-31 03:22:51,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 105.3030303030303) internal successors, (3475), 33 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:51,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:51,602 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:51,603 INFO L175 Difference]: Start difference. First operand has 248 places, 611 transitions, 12590 flow. Second operand 33 states and 3475 transitions. [2023-08-31 03:22:51,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 843 transitions, 18165 flow [2023-08-31 03:22:51,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 843 transitions, 17542 flow, removed 294 selfloop flow, removed 8 redundant places. [2023-08-31 03:22:51,975 INFO L231 Difference]: Finished difference. Result has 280 places, 717 transitions, 16445 flow [2023-08-31 03:22:51,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11847, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16445, PETRI_PLACES=280, PETRI_TRANSITIONS=717} [2023-08-31 03:22:51,976 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2023-08-31 03:22:51,976 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 717 transitions, 16445 flow [2023-08-31 03:22:51,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:51,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:51,977 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:51,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:52,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 03:22:52,183 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:52,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1254194308, now seen corresponding path program 18 times [2023-08-31 03:22:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:52,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623827708] [2023-08-31 03:22:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:52,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:52,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623827708] [2023-08-31 03:22:52,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623827708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:52,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737054270] [2023-08-31 03:22:52,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:22:52,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:52,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:52,659 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:52,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:22:52,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:22:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 03:22:52,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:22:53,055 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:22:53,181 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:22:53,181 INFO L350 Elim1Store]: Elim1 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 11 [2023-08-31 03:22:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:53,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:53,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:53,377 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-08-31 03:22:53,381 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 18 [2023-08-31 03:22:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:53,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737054270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:53,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:53,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-08-31 03:22:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920937003] [2023-08-31 03:22:53,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:22:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:22:53,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2023-08-31 03:22:54,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 271 [2023-08-31 03:22:54,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 717 transitions, 16445 flow. Second operand has 31 states, 31 states have (on average 102.58064516129032) internal successors, (3180), 31 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:54,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:54,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 271 [2023-08-31 03:22:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:22:56,937 INFO L130 PetriNetUnfolder]: 1212/2501 cut-off events. [2023-08-31 03:22:56,937 INFO L131 PetriNetUnfolder]: For 63316/63316 co-relation queries the response was YES. [2023-08-31 03:22:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22763 conditions, 2501 events. 1212/2501 cut-off events. For 63316/63316 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16423 event pairs, 235 based on Foata normal form. 190/2691 useless extension candidates. Maximal degree in co-relation 22670. Up to 1069 conditions per place. [2023-08-31 03:22:56,959 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 366 selfloop transitions, 217 changer transitions 52/643 dead transitions. [2023-08-31 03:22:56,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 643 transitions, 14086 flow [2023-08-31 03:22:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 03:22:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 03:22:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3857 transitions. [2023-08-31 03:22:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953464534645346 [2023-08-31 03:22:56,962 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3857 transitions. [2023-08-31 03:22:56,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3857 transitions. [2023-08-31 03:22:56,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:56,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3857 transitions. [2023-08-31 03:22:56,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 107.13888888888889) internal successors, (3857), 36 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:56,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:56,972 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:56,972 INFO L175 Difference]: Start difference. First operand has 280 places, 717 transitions, 16445 flow. Second operand 36 states and 3857 transitions. [2023-08-31 03:22:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 643 transitions, 14086 flow [2023-08-31 03:22:57,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 643 transitions, 13179 flow, removed 159 selfloop flow, removed 36 redundant places. [2023-08-31 03:22:57,175 INFO L231 Difference]: Finished difference. Result has 270 places, 459 transitions, 10487 flow [2023-08-31 03:22:57,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=8228, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10487, PETRI_PLACES=270, PETRI_TRANSITIONS=459} [2023-08-31 03:22:57,176 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 249 predicate places. [2023-08-31 03:22:57,176 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 459 transitions, 10487 flow [2023-08-31 03:22:57,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 102.58064516129032) internal successors, (3180), 31 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:57,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:57,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:57,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:57,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:57,381 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:22:57,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:57,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1780601278, now seen corresponding path program 19 times [2023-08-31 03:22:57,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:57,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760114552] [2023-08-31 03:22:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:57,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:57,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760114552] [2023-08-31 03:22:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760114552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:57,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064678822] [2023-08-31 03:22:57,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:22:57,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:57,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:57,889 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:57,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 03:22:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 03:22:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:58,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:22:58,272 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:22:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:58,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:58,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:58,581 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-08-31 03:22:58,585 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 18 [2023-08-31 03:22:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:59,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064678822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:59,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:59,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-08-31 03:22:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303905354] [2023-08-31 03:22:59,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 03:22:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 03:22:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=957, Unknown=3, NotChecked=0, Total=1122 [2023-08-31 03:22:59,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-08-31 03:22:59,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 459 transitions, 10487 flow. Second operand has 34 states, 34 states have (on average 82.52941176470588) internal successors, (2806), 34 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:59,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:59,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-08-31 03:22:59,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:02,586 INFO L130 PetriNetUnfolder]: 1132/2297 cut-off events. [2023-08-31 03:23:02,586 INFO L131 PetriNetUnfolder]: For 48562/48562 co-relation queries the response was YES. [2023-08-31 03:23:02,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21275 conditions, 2297 events. 1132/2297 cut-off events. For 48562/48562 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14354 event pairs, 155 based on Foata normal form. 24/2321 useless extension candidates. Maximal degree in co-relation 21188. Up to 641 conditions per place. [2023-08-31 03:23:02,607 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 267 selfloop transitions, 273 changer transitions 2/542 dead transitions. [2023-08-31 03:23:02,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 542 transitions, 11997 flow [2023-08-31 03:23:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:23:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:23:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2420 transitions. [2023-08-31 03:23:02,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3189246178176067 [2023-08-31 03:23:02,609 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2420 transitions. [2023-08-31 03:23:02,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2420 transitions. [2023-08-31 03:23:02,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:02,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2420 transitions. [2023-08-31 03:23:02,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 86.42857142857143) internal successors, (2420), 28 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:02,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:02,617 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:02,617 INFO L175 Difference]: Start difference. First operand has 270 places, 459 transitions, 10487 flow. Second operand 28 states and 2420 transitions. [2023-08-31 03:23:02,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 542 transitions, 11997 flow [2023-08-31 03:23:02,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 542 transitions, 11171 flow, removed 280 selfloop flow, removed 18 redundant places. [2023-08-31 03:23:02,788 INFO L231 Difference]: Finished difference. Result has 274 places, 454 transitions, 10098 flow [2023-08-31 03:23:02,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9533, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10098, PETRI_PLACES=274, PETRI_TRANSITIONS=454} [2023-08-31 03:23:02,789 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-08-31 03:23:02,789 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 454 transitions, 10098 flow [2023-08-31 03:23:02,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.52941176470588) internal successors, (2806), 34 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:02,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:23:02,790 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:23:02,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 03:23:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:02,990 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:23:02,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:23:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1595922428, now seen corresponding path program 20 times [2023-08-31 03:23:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:23:02,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967746562] [2023-08-31 03:23:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:23:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:23:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:03,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:23:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967746562] [2023-08-31 03:23:03,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967746562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:23:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697632741] [2023-08-31 03:23:03,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:23:03,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:03,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:23:03,745 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:23:03,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 03:23:03,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:23:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:23:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:23:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:23:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:23:04,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:23:04,050 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:23:04,051 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-08-31 03:23:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:23:04,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697632741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:23:04,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:23:04,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 20 [2023-08-31 03:23:04,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023667421] [2023-08-31 03:23:04,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:23:04,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:23:04,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:23:04,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:23:04,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:23:04,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-08-31 03:23:04,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 454 transitions, 10098 flow. Second operand has 21 states, 21 states have (on average 108.23809523809524) internal successors, (2273), 21 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:04,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:23:04,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-08-31 03:23:04,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:05,596 INFO L130 PetriNetUnfolder]: 1404/2807 cut-off events. [2023-08-31 03:23:05,596 INFO L131 PetriNetUnfolder]: For 60842/60842 co-relation queries the response was YES. [2023-08-31 03:23:05,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25857 conditions, 2807 events. 1404/2807 cut-off events. For 60842/60842 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18155 event pairs, 279 based on Foata normal form. 56/2863 useless extension candidates. Maximal degree in co-relation 25774. Up to 1649 conditions per place. [2023-08-31 03:23:05,624 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 404 selfloop transitions, 214 changer transitions 1/627 dead transitions. [2023-08-31 03:23:05,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 627 transitions, 14166 flow [2023-08-31 03:23:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:23:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:23:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2241 transitions. [2023-08-31 03:23:05,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346863468634687 [2023-08-31 03:23:05,626 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2241 transitions. [2023-08-31 03:23:05,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2241 transitions. [2023-08-31 03:23:05,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:05,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2241 transitions. [2023-08-31 03:23:05,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.05) internal successors, (2241), 20 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:05,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:05,632 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:05,632 INFO L175 Difference]: Start difference. First operand has 274 places, 454 transitions, 10098 flow. Second operand 20 states and 2241 transitions. [2023-08-31 03:23:05,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 627 transitions, 14166 flow [2023-08-31 03:23:05,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 627 transitions, 13545 flow, removed 28 selfloop flow, removed 19 redundant places. [2023-08-31 03:23:05,908 INFO L231 Difference]: Finished difference. Result has 276 places, 524 transitions, 11589 flow [2023-08-31 03:23:05,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11589, PETRI_PLACES=276, PETRI_TRANSITIONS=524} [2023-08-31 03:23:05,909 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-08-31 03:23:05,909 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 524 transitions, 11589 flow [2023-08-31 03:23:05,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 108.23809523809524) internal successors, (2273), 21 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:05,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:23:05,909 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:23:05,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 03:23:06,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-31 03:23:06,116 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:23:06,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:23:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1786705840, now seen corresponding path program 21 times [2023-08-31 03:23:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:23:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998084717] [2023-08-31 03:23:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:23:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:23:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:06,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:23:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998084717] [2023-08-31 03:23:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998084717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:23:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402180817] [2023-08-31 03:23:06,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:23:06,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:06,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:23:06,981 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:23:06,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 03:23:07,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:23:07,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:23:07,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 03:23:07,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:23:07,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:23:07,280 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2023-08-31 03:23:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:23:07,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:23:07,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:07,577 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-08-31 03:23:07,581 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 18 [2023-08-31 03:23:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:23:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402180817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:23:07,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:23:07,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-08-31 03:23:07,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954857940] [2023-08-31 03:23:07,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:23:07,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:23:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:23:07,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:23:07,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:23:08,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 271 [2023-08-31 03:23:08,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 524 transitions, 11589 flow. Second operand has 28 states, 28 states have (on average 99.89285714285714) internal successors, (2797), 28 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:08,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:23:08,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 271 [2023-08-31 03:23:08,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:10,668 INFO L130 PetriNetUnfolder]: 1624/3191 cut-off events. [2023-08-31 03:23:10,668 INFO L131 PetriNetUnfolder]: For 64741/64741 co-relation queries the response was YES. [2023-08-31 03:23:10,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29139 conditions, 3191 events. 1624/3191 cut-off events. For 64741/64741 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21055 event pairs, 164 based on Foata normal form. 88/3279 useless extension candidates. Maximal degree in co-relation 29055. Up to 1433 conditions per place. [2023-08-31 03:23:10,698 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 401 selfloop transitions, 304 changer transitions 0/705 dead transitions. [2023-08-31 03:23:10,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 705 transitions, 15913 flow [2023-08-31 03:23:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:23:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:23:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2489 transitions. [2023-08-31 03:23:10,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38268757687576876 [2023-08-31 03:23:10,701 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2489 transitions. [2023-08-31 03:23:10,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2489 transitions. [2023-08-31 03:23:10,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:10,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2489 transitions. [2023-08-31 03:23:10,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 103.70833333333333) internal successors, (2489), 24 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:10,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:10,708 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:10,708 INFO L175 Difference]: Start difference. First operand has 276 places, 524 transitions, 11589 flow. Second operand 24 states and 2489 transitions. [2023-08-31 03:23:10,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 705 transitions, 15913 flow [2023-08-31 03:23:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 705 transitions, 15718 flow, removed 64 selfloop flow, removed 7 redundant places. [2023-08-31 03:23:10,993 INFO L231 Difference]: Finished difference. Result has 300 places, 588 transitions, 13658 flow [2023-08-31 03:23:10,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11445, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13658, PETRI_PLACES=300, PETRI_TRANSITIONS=588} [2023-08-31 03:23:10,994 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-08-31 03:23:10,995 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 588 transitions, 13658 flow [2023-08-31 03:23:10,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 99.89285714285714) internal successors, (2797), 28 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:10,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:23:10,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:23:11,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 03:23:11,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-31 03:23:11,207 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:23:11,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:23:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 752855597, now seen corresponding path program 22 times [2023-08-31 03:23:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:23:11,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423005071] [2023-08-31 03:23:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:23:11,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:23:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:12,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:23:12,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423005071] [2023-08-31 03:23:12,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423005071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:23:12,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867987930] [2023-08-31 03:23:12,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:23:12,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:12,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:23:12,453 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:23:12,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 03:23:12,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:23:12,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:23:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-31 03:23:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:23:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:13,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:23:13,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:13,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-08-31 03:23:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:14,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867987930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:23:14,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:23:14,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-08-31 03:23:14,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106660713] [2023-08-31 03:23:14,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:23:14,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-31 03:23:14,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:23:14,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-31 03:23:14,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2023-08-31 03:23:17,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 271 [2023-08-31 03:23:17,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 588 transitions, 13658 flow. Second operand has 42 states, 42 states have (on average 85.5) internal successors, (3591), 42 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:17,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:23:17,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 271 [2023-08-31 03:23:17,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:20,455 INFO L130 PetriNetUnfolder]: 1755/3527 cut-off events. [2023-08-31 03:23:20,455 INFO L131 PetriNetUnfolder]: For 77323/77323 co-relation queries the response was YES. [2023-08-31 03:23:20,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 3527 events. 1755/3527 cut-off events. For 77323/77323 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24176 event pairs, 348 based on Foata normal form. 3/3530 useless extension candidates. Maximal degree in co-relation 32929. Up to 1997 conditions per place. [2023-08-31 03:23:20,486 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 380 selfloop transitions, 305 changer transitions 44/729 dead transitions. [2023-08-31 03:23:20,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 729 transitions, 16708 flow [2023-08-31 03:23:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 03:23:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 03:23:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2859 transitions. [2023-08-31 03:23:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32968173431734316 [2023-08-31 03:23:20,489 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2859 transitions. [2023-08-31 03:23:20,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2859 transitions. [2023-08-31 03:23:20,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:20,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2859 transitions. [2023-08-31 03:23:20,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 89.34375) internal successors, (2859), 32 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:20,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:20,498 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:20,498 INFO L175 Difference]: Start difference. First operand has 300 places, 588 transitions, 13658 flow. Second operand 32 states and 2859 transitions. [2023-08-31 03:23:20,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 729 transitions, 16708 flow [2023-08-31 03:23:20,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 729 transitions, 16387 flow, removed 72 selfloop flow, removed 12 redundant places. [2023-08-31 03:23:20,799 INFO L231 Difference]: Finished difference. Result has 333 places, 619 transitions, 14961 flow [2023-08-31 03:23:20,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=13339, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14961, PETRI_PLACES=333, PETRI_TRANSITIONS=619} [2023-08-31 03:23:20,800 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2023-08-31 03:23:20,800 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 619 transitions, 14961 flow [2023-08-31 03:23:20,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 85.5) internal successors, (3591), 42 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:20,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:23:20,801 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:23:20,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 03:23:21,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:21,007 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:23:21,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:23:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1899490793, now seen corresponding path program 23 times [2023-08-31 03:23:21,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:23:21,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633461775] [2023-08-31 03:23:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:23:21,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:23:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:22,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:23:22,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633461775] [2023-08-31 03:23:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633461775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:23:22,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145252923] [2023-08-31 03:23:22,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:23:22,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:23:22,233 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:23:22,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 03:23:22,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:23:22,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:23:22,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-31 03:23:22,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:23:22,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-31 03:23:22,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-31 03:23:22,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:23:22,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:23:22,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:23:22,679 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:23:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:23,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:23:24,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:24,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 107 [2023-08-31 03:23:24,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:24,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 416 treesize of output 392 [2023-08-31 03:23:24,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:24,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 140 [2023-08-31 03:23:24,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:24,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 89 [2023-08-31 03:23:25,211 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-31 03:23:25,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 1 [2023-08-31 03:23:25,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:25,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 73 [2023-08-31 03:23:25,224 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:23:25,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:25,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 50 [2023-08-31 03:23:25,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:25,235 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 37 [2023-08-31 03:23:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145252923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:23:25,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:23:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-31 03:23:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414071834] [2023-08-31 03:23:25,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:23:25,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-31 03:23:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:23:25,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-31 03:23:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1675, Unknown=5, NotChecked=0, Total=1892 [2023-08-31 03:23:26,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-31 03:23:26,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 619 transitions, 14961 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:26,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:23:26,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-31 03:23:26,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:35,016 WARN L222 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 83 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:23:41,870 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 96 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:23:49,611 INFO L130 PetriNetUnfolder]: 1787/3574 cut-off events. [2023-08-31 03:23:49,611 INFO L131 PetriNetUnfolder]: For 82558/82558 co-relation queries the response was YES. [2023-08-31 03:23:49,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34751 conditions, 3574 events. 1787/3574 cut-off events. For 82558/82558 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 24404 event pairs, 184 based on Foata normal form. 2/3576 useless extension candidates. Maximal degree in co-relation 34644. Up to 2175 conditions per place. [2023-08-31 03:23:49,651 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 356 selfloop transitions, 352 changer transitions 37/745 dead transitions. [2023-08-31 03:23:49,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 745 transitions, 17805 flow [2023-08-31 03:23:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 03:23:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 03:23:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2620 transitions. [2023-08-31 03:23:49,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2685526855268553 [2023-08-31 03:23:49,654 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2620 transitions. [2023-08-31 03:23:49,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2620 transitions. [2023-08-31 03:23:49,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:49,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2620 transitions. [2023-08-31 03:23:49,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 72.77777777777777) internal successors, (2620), 36 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:49,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:49,661 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:49,661 INFO L175 Difference]: Start difference. First operand has 333 places, 619 transitions, 14961 flow. Second operand 36 states and 2620 transitions. [2023-08-31 03:23:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 745 transitions, 17805 flow [2023-08-31 03:23:50,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 745 transitions, 17505 flow, removed 60 selfloop flow, removed 21 redundant places. [2023-08-31 03:23:50,093 INFO L231 Difference]: Finished difference. Result has 350 places, 650 transitions, 16135 flow [2023-08-31 03:23:50,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=14691, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16135, PETRI_PLACES=350, PETRI_TRANSITIONS=650} [2023-08-31 03:23:50,094 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 329 predicate places. [2023-08-31 03:23:50,095 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 650 transitions, 16135 flow [2023-08-31 03:23:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:23:50,095 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:23:50,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 03:23:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:50,302 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:23:50,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:23:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1759452985, now seen corresponding path program 24 times [2023-08-31 03:23:50,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:23:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934395906] [2023-08-31 03:23:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:23:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:23:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:51,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:23:51,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934395906] [2023-08-31 03:23:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934395906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:23:51,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367199626] [2023-08-31 03:23:51,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:23:51,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:23:51,255 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:23:51,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 03:23:51,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:23:51,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:23:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-31 03:23:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:23:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:23:51,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:23:52,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:52,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 83 [2023-08-31 03:23:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:23:52,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367199626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:23:52,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:23:52,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2023-08-31 03:23:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098013790] [2023-08-31 03:23:52,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:23:52,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 03:23:52,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:23:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 03:23:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2023-08-31 03:23:55,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 271 [2023-08-31 03:23:55,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 650 transitions, 16135 flow. Second operand has 34 states, 34 states have (on average 92.73529411764706) internal successors, (3153), 34 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:55,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:23:55,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 271 [2023-08-31 03:23:55,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:57,022 INFO L130 PetriNetUnfolder]: 1769/3540 cut-off events. [2023-08-31 03:23:57,023 INFO L131 PetriNetUnfolder]: For 89555/89555 co-relation queries the response was YES. [2023-08-31 03:23:57,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35370 conditions, 3540 events. 1769/3540 cut-off events. For 89555/89555 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24055 event pairs, 612 based on Foata normal form. 2/3542 useless extension candidates. Maximal degree in co-relation 35259. Up to 3119 conditions per place. [2023-08-31 03:23:57,062 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 554 selfloop transitions, 121 changer transitions 35/710 dead transitions. [2023-08-31 03:23:57,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 710 transitions, 17990 flow [2023-08-31 03:23:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:23:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:23:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2297 transitions. [2023-08-31 03:23:57,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35316728167281675 [2023-08-31 03:23:57,064 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2297 transitions. [2023-08-31 03:23:57,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2297 transitions. [2023-08-31 03:23:57,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:57,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2297 transitions. [2023-08-31 03:23:57,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 95.70833333333333) internal successors, (2297), 24 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:57,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:57,069 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:57,069 INFO L175 Difference]: Start difference. First operand has 350 places, 650 transitions, 16135 flow. Second operand 24 states and 2297 transitions. [2023-08-31 03:23:57,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 710 transitions, 17990 flow [2023-08-31 03:23:57,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 710 transitions, 17812 flow, removed 51 selfloop flow, removed 16 redundant places. [2023-08-31 03:23:57,450 INFO L231 Difference]: Finished difference. Result has 356 places, 648 transitions, 16142 flow [2023-08-31 03:23:57,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=15968, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=16142, PETRI_PLACES=356, PETRI_TRANSITIONS=648} [2023-08-31 03:23:57,451 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 335 predicate places. [2023-08-31 03:23:57,451 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 648 transitions, 16142 flow [2023-08-31 03:23:57,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 92.73529411764706) internal successors, (3153), 34 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:57,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:23:57,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:23:57,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 03:23:57,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:57,652 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:23:57,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:23:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1987891647, now seen corresponding path program 25 times [2023-08-31 03:23:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:23:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392189112] [2023-08-31 03:23:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:23:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:23:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:58,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:23:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392189112] [2023-08-31 03:23:58,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392189112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:23:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354640420] [2023-08-31 03:23:58,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:23:58,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:23:58,952 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:23:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 03:23:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-31 03:23:59,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:23:59,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:23:59,433 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 27 [2023-08-31 03:23:59,739 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:23:59,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:23:59,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-31 03:23:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:59,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:24:00,239 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0)) (and (forall ((v_ArrVal_1198 (Array Int Int))) (= c_~N~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1198) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))))) (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296)))) is different from false [2023-08-31 03:24:00,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:00,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 94 [2023-08-31 03:24:00,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:00,297 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 36 [2023-08-31 03:24:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-31 03:24:00,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354640420] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:24:00,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:24:00,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2023-08-31 03:24:00,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916413809] [2023-08-31 03:24:00,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:24:00,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-31 03:24:00,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:24:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-31 03:24:00,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1523, Unknown=3, NotChecked=80, Total=1806 [2023-08-31 03:24:01,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-08-31 03:24:01,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 648 transitions, 16142 flow. Second operand has 43 states, 43 states have (on average 72.44186046511628) internal successors, (3115), 43 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:24:01,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:24:01,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-08-31 03:24:01,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:24:09,185 INFO L130 PetriNetUnfolder]: 1851/3718 cut-off events. [2023-08-31 03:24:09,185 INFO L131 PetriNetUnfolder]: For 98477/98477 co-relation queries the response was YES. [2023-08-31 03:24:09,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37497 conditions, 3718 events. 1851/3718 cut-off events. For 98477/98477 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 25674 event pairs, 364 based on Foata normal form. 2/3720 useless extension candidates. Maximal degree in co-relation 37384. Up to 2004 conditions per place. [2023-08-31 03:24:09,231 INFO L137 encePairwiseOnDemand]: 258/271 looper letters, 504 selfloop transitions, 252 changer transitions 40/796 dead transitions. [2023-08-31 03:24:09,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 796 transitions, 19930 flow [2023-08-31 03:24:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 03:24:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 03:24:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2805 transitions. [2023-08-31 03:24:09,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27974468933878527 [2023-08-31 03:24:09,235 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2805 transitions. [2023-08-31 03:24:09,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2805 transitions. [2023-08-31 03:24:09,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:24:09,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2805 transitions. [2023-08-31 03:24:09,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 75.8108108108108) internal successors, (2805), 37 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:24:09,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:24:09,241 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:24:09,241 INFO L175 Difference]: Start difference. First operand has 356 places, 648 transitions, 16142 flow. Second operand 37 states and 2805 transitions. [2023-08-31 03:24:09,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 796 transitions, 19930 flow [2023-08-31 03:24:09,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 796 transitions, 19674 flow, removed 18 selfloop flow, removed 19 redundant places. [2023-08-31 03:24:09,872 INFO L231 Difference]: Finished difference. Result has 380 places, 693 transitions, 17781 flow [2023-08-31 03:24:09,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=15943, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17781, PETRI_PLACES=380, PETRI_TRANSITIONS=693} [2023-08-31 03:24:09,873 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 359 predicate places. [2023-08-31 03:24:09,873 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 693 transitions, 17781 flow [2023-08-31 03:24:09,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 72.44186046511628) internal successors, (3115), 43 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:24:09,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:24:09,874 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:24:09,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 03:24:10,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-31 03:24:10,075 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:24:10,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:24:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1912875097, now seen corresponding path program 26 times [2023-08-31 03:24:10,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:24:10,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682396528] [2023-08-31 03:24:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:24:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:24:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:24:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:24:11,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:24:11,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682396528] [2023-08-31 03:24:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682396528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:24:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436616761] [2023-08-31 03:24:11,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:24:11,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:24:11,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:24:11,233 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:24:11,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 03:24:11,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:24:11,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:24:11,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 95 conjunts are in the unsatisfiable core [2023-08-31 03:24:11,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:24:11,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:24:11,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:24:11,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:24:11,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:24:11,711 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2023-08-31 03:24:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:24:12,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:24:13,616 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-08-31 03:24:13,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 379 treesize of output 304 [2023-08-31 03:24:13,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 299 treesize of output 284 [2023-08-31 03:24:13,635 INFO L350 Elim1Store]: Elim1 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 259 treesize of output 245 [2023-08-31 03:24:13,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 232 [2023-08-31 03:24:13,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:13,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 247 [2023-08-31 03:24:13,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:13,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 519 treesize of output 549 [2023-08-31 03:24:13,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:13,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 467 treesize of output 446 [2023-08-31 03:24:13,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:13,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 427 treesize of output 438 [2023-08-31 03:24:13,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:13,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 417 treesize of output 457 [2023-08-31 03:24:13,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:13,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 375 treesize of output 354 [2023-08-31 03:24:14,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:24:14,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 346 [2023-08-31 03:24:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:24:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436616761] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:24:44,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:24:44,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-31 03:24:44,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043663180] [2023-08-31 03:24:44,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:24:44,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-31 03:24:44,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:24:44,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-31 03:24:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1644, Unknown=14, NotChecked=0, Total=1892 [2023-08-31 03:24:44,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-31 03:24:44,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 693 transitions, 17781 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:24:44,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:24:44,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-31 03:24:44,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:25:03,668 WARN L222 SmtUtils]: Spent 12.89s on a formula simplification. DAG size of input: 110 DAG size of output: 110 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:25:05,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:25:06,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:25:06,960 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse26 (* c_~q_front~0 4)) (.cse24 (* 4 c_~q_back~0))) (let ((.cse11 (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296)) (.cse21 (+ c_~q~0.offset .cse24)) (.cse7 (+ .cse26 c_~q~0.offset)) (.cse23 (select |c_#memory_int| c_~q~0.base)) (.cse6 (+ .cse26 c_~q~0.offset 4)) (.cse19 (forall ((~C~0 Int)) (let ((.cse25 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse25) 4294967296) (mod (+ c_~y~0 .cse25) 4294967296))))) (.cse5 (+ c_~q~0.offset .cse24 4))) (let ((.cse3 (or .cse19 (forall ((v_ArrVal_1242 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base) .cse5) 1))))) (.cse12 (+ (select .cse23 .cse7) (select .cse23 .cse6))) (.cse0 (not (= (select .cse23 .cse21) 1))) (.cse1 (< c_~q_back~0 0)) (.cse9 (< c_~n~0 (+ 3 c_~q_back~0))) (.cse16 (= .cse11 (mod (+ (* c_~C~0 2) c_~x~0) 4294967296))) (.cse15 (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|)) (.cse17 (< c_~n~0 (+ 2 c_~q_back~0))) (.cse2 (< c_~n~0 (+ c_~q_front~0 1))) (.cse10 (< c_~q_front~0 0))) (and (or .cse0 .cse1 .cse2 (and .cse3 (forall ((v_ArrVal_1242 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base))) (or (not (= (select .cse4 .cse5) 1)) (< 1 (+ (select .cse4 .cse6) (select .cse4 .cse7)))))) (forall ((v_ArrVal_1242 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base))) (or (not (= (select .cse8 .cse5) 1)) (< (+ (select .cse8 .cse6) (select .cse8 .cse7)) 3))))) .cse9 .cse10) (or (<= (+ c_~q_back~0 1) c_~q_front~0) (<= c_~n~0 c_~q_back~0) .cse10 (and (= .cse11 (mod (+ c_~C~0 c_~x~0) 4294967296)) (= c_~N~0 .cse12)) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) (or .cse0 .cse1 .cse2 .cse9 .cse10 (and .cse3 (forall ((v_ArrVal_1242 (Array Int Int))) (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base))) (or (not (= (select .cse13 .cse5) 1)) (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) (+ (select .cse13 .cse6) (select .cse13 .cse7)))))) (forall ((v_ArrVal_1242 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base))) (or (not (= (select .cse14 .cse5) 1)) (< (+ (select .cse14 .cse6) (select .cse14 .cse7)) (+ 3 |c_thread1Thread1of1ForFork0_~i~0#1|))))))) (or (and (< |c_thread1Thread1of1ForFork0_~i~0#1| .cse12) (< .cse12 .cse15) .cse16) .cse0 .cse17 .cse2 .cse10) (or .cse1 .cse2 .cse9 .cse10 (let ((.cse18 (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|))) (and (or .cse18 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (and .cse19 (= c_~q_front~0 c_~q_back~0)) .cse18)))) (or (and (forall ((v_ArrVal_1242 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base))) (or (not (= (select .cse20 .cse21) 1)) (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ (select .cse20 .cse6) (select .cse20 .cse7)))))) (or (forall ((v_ArrVal_1242 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base) .cse21) 1))) .cse16) (forall ((v_ArrVal_1242 (Array Int Int))) (let ((.cse22 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1242) c_~q~0.base))) (or (< (+ (select .cse22 .cse6) (select .cse22 .cse7)) .cse15) (not (= (select .cse22 .cse21) 1)))))) .cse17 .cse2 .cse10))))) is different from false [2023-08-31 03:25:25,482 WARN L222 SmtUtils]: Spent 17.18s on a formula simplification. DAG size of input: 143 DAG size of output: 126 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:25:29,401 INFO L130 PetriNetUnfolder]: 1836/3693 cut-off events. [2023-08-31 03:25:29,402 INFO L131 PetriNetUnfolder]: For 103445/103445 co-relation queries the response was YES. [2023-08-31 03:25:29,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38530 conditions, 3693 events. 1836/3693 cut-off events. For 103445/103445 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25433 event pairs, 456 based on Foata normal form. 2/3695 useless extension candidates. Maximal degree in co-relation 38408. Up to 3320 conditions per place. [2023-08-31 03:25:29,442 INFO L137 encePairwiseOnDemand]: 256/271 looper letters, 606 selfloop transitions, 122 changer transitions 38/766 dead transitions. [2023-08-31 03:25:29,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 766 transitions, 19916 flow [2023-08-31 03:25:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:25:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:25:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2528 transitions. [2023-08-31 03:25:29,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2665260938323669 [2023-08-31 03:25:29,445 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2528 transitions. [2023-08-31 03:25:29,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2528 transitions. [2023-08-31 03:25:29,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:25:29,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2528 transitions. [2023-08-31 03:25:29,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 72.22857142857143) internal successors, (2528), 35 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:29,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:29,451 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:29,451 INFO L175 Difference]: Start difference. First operand has 380 places, 693 transitions, 17781 flow. Second operand 35 states and 2528 transitions. [2023-08-31 03:25:29,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 766 transitions, 19916 flow [2023-08-31 03:25:29,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 766 transitions, 19235 flow, removed 53 selfloop flow, removed 21 redundant places. [2023-08-31 03:25:29,925 INFO L231 Difference]: Finished difference. Result has 394 places, 697 transitions, 17428 flow [2023-08-31 03:25:29,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=17108, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=17428, PETRI_PLACES=394, PETRI_TRANSITIONS=697} [2023-08-31 03:25:29,926 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 373 predicate places. [2023-08-31 03:25:29,926 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 697 transitions, 17428 flow [2023-08-31 03:25:29,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:29,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:25:29,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:25:29,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 03:25:30,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 03:25:30,127 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:25:30,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:25:30,128 INFO L85 PathProgramCache]: Analyzing trace with hash -967074237, now seen corresponding path program 27 times [2023-08-31 03:25:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:25:30,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913956922] [2023-08-31 03:25:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:25:30,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:25:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:25:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:25:31,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:25:31,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913956922] [2023-08-31 03:25:31,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913956922] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:25:31,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022955050] [2023-08-31 03:25:31,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:25:31,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:25:31,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:25:31,332 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:25:31,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 03:25:31,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:25:31,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:25:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-31 03:25:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:25:31,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2023-08-31 03:25:31,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:25:31,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:25:32,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:25:32,144 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 30 [2023-08-31 03:25:32,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:32,518 INFO L350 Elim1Store]: Elim1 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 7 [2023-08-31 03:25:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:25:32,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:25:33,375 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~q_back~0 1))) (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset 4)) (.cse2 (+ .cse4 c_~q~0.offset))) (and (forall ((v_ArrVal_1286 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1286) c_~q~0.base))) (+ (select .cse0 .cse1) (select .cse0 .cse2))) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|))) (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296)) (forall ((v_ArrVal_1286 (Array Int Int))) (< |c_thread1Thread1of1ForFork0_~i~0#1| (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1286) c_~q~0.base))) (+ (select .cse3 .cse1) (select .cse3 .cse2)))))))) (<= c_~n~0 .cse5) (< .cse5 0))) is different from false [2023-08-31 03:25:34,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:34,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 91 [2023-08-31 03:25:34,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:34,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 273 [2023-08-31 03:25:34,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:34,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 98 [2023-08-31 03:25:34,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:34,247 INFO L350 Elim1Store]: Elim1 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 46 treesize of output 20 [2023-08-31 03:25:34,620 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-08-31 03:25:34,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 1 [2023-08-31 03:25:34,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:34,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 57 [2023-08-31 03:25:34,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:34,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 50 [2023-08-31 03:25:34,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:34,658 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 37 [2023-08-31 03:25:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-31 03:25:34,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022955050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:25:34,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:25:34,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-31 03:25:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770086976] [2023-08-31 03:25:34,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:25:34,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-31 03:25:34,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:25:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-31 03:25:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1571, Unknown=11, NotChecked=82, Total=1892 [2023-08-31 03:25:35,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-31 03:25:35,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 697 transitions, 17428 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:35,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:25:35,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-31 03:25:35,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:25:45,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:25:45,543 INFO L130 PetriNetUnfolder]: 1844/3725 cut-off events. [2023-08-31 03:25:45,543 INFO L131 PetriNetUnfolder]: For 99523/99523 co-relation queries the response was YES. [2023-08-31 03:25:45,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39325 conditions, 3725 events. 1844/3725 cut-off events. For 99523/99523 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26233 event pairs, 454 based on Foata normal form. 11/3736 useless extension candidates. Maximal degree in co-relation 39201. Up to 3261 conditions per place. [2023-08-31 03:25:45,588 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 618 selfloop transitions, 159 changer transitions 20/797 dead transitions. [2023-08-31 03:25:45,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 797 transitions, 20709 flow [2023-08-31 03:25:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 03:25:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 03:25:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2884 transitions. [2023-08-31 03:25:45,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26605166051660517 [2023-08-31 03:25:45,592 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2884 transitions. [2023-08-31 03:25:45,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2884 transitions. [2023-08-31 03:25:45,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:25:45,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2884 transitions. [2023-08-31 03:25:45,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 72.1) internal successors, (2884), 40 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:45,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:45,601 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:45,601 INFO L175 Difference]: Start difference. First operand has 394 places, 697 transitions, 17428 flow. Second operand 40 states and 2884 transitions. [2023-08-31 03:25:45,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 797 transitions, 20709 flow [2023-08-31 03:25:46,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 797 transitions, 20427 flow, removed 24 selfloop flow, removed 30 redundant places. [2023-08-31 03:25:46,109 INFO L231 Difference]: Finished difference. Result has 406 places, 736 transitions, 18701 flow [2023-08-31 03:25:46,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=17055, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=18701, PETRI_PLACES=406, PETRI_TRANSITIONS=736} [2023-08-31 03:25:46,109 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 385 predicate places. [2023-08-31 03:25:46,109 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 736 transitions, 18701 flow [2023-08-31 03:25:46,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:46,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:25:46,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:25:46,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 03:25:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 03:25:46,311 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:25:46,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:25:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1480689643, now seen corresponding path program 28 times [2023-08-31 03:25:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:25:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135102823] [2023-08-31 03:25:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:25:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:25:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:25:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:25:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:25:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135102823] [2023-08-31 03:25:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135102823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:25:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422061851] [2023-08-31 03:25:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:25:47,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:25:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:25:47,255 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:25:47,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 03:25:47,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:25:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:25:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-31 03:25:47,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:25:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:25:47,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:25:48,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:48,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-08-31 03:25:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:25:48,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422061851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:25:48,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:25:48,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-08-31 03:25:48,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655416561] [2023-08-31 03:25:48,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:25:48,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:25:48,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:25:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:25:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 03:25:52,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-31 03:25:52,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 736 transitions, 18701 flow. Second operand has 35 states, 35 states have (on average 91.74285714285715) internal successors, (3211), 35 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:52,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:25:52,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-31 03:25:52,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:25:54,618 INFO L130 PetriNetUnfolder]: 1850/3724 cut-off events. [2023-08-31 03:25:54,618 INFO L131 PetriNetUnfolder]: For 103918/103918 co-relation queries the response was YES. [2023-08-31 03:25:54,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40757 conditions, 3724 events. 1850/3724 cut-off events. For 103918/103918 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26065 event pairs, 535 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 40628. Up to 3320 conditions per place. [2023-08-31 03:25:54,660 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 610 selfloop transitions, 150 changer transitions 24/784 dead transitions. [2023-08-31 03:25:54,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 784 transitions, 20899 flow [2023-08-31 03:25:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:25:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:25:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2263 transitions. [2023-08-31 03:25:54,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34793972939729395 [2023-08-31 03:25:54,662 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2263 transitions. [2023-08-31 03:25:54,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2263 transitions. [2023-08-31 03:25:54,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:25:54,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2263 transitions. [2023-08-31 03:25:54,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.29166666666667) internal successors, (2263), 24 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:54,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:54,667 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:54,667 INFO L175 Difference]: Start difference. First operand has 406 places, 736 transitions, 18701 flow. Second operand 24 states and 2263 transitions. [2023-08-31 03:25:54,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 784 transitions, 20899 flow [2023-08-31 03:25:55,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 784 transitions, 20668 flow, removed 47 selfloop flow, removed 25 redundant places. [2023-08-31 03:25:55,180 INFO L231 Difference]: Finished difference. Result has 405 places, 737 transitions, 18788 flow [2023-08-31 03:25:55,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=18470, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=18788, PETRI_PLACES=405, PETRI_TRANSITIONS=737} [2023-08-31 03:25:55,181 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 384 predicate places. [2023-08-31 03:25:55,181 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 737 transitions, 18788 flow [2023-08-31 03:25:55,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 91.74285714285715) internal successors, (3211), 35 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:25:55,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:25:55,182 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:25:55,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 03:25:55,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-31 03:25:55,383 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:25:55,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:25:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash 784922863, now seen corresponding path program 29 times [2023-08-31 03:25:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:25:55,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879669375] [2023-08-31 03:25:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:25:55,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:25:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:25:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:25:56,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:25:56,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879669375] [2023-08-31 03:25:56,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879669375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:25:56,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120820208] [2023-08-31 03:25:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:25:56,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:25:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:25:56,462 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:25:56,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 03:25:56,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:25:56,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:25:56,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 99 conjunts are in the unsatisfiable core [2023-08-31 03:25:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:25:56,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-31 03:25:56,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-31 03:25:56,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-31 03:25:56,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:25:56,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:25:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:25:57,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:25:59,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:59,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 76 [2023-08-31 03:25:59,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:59,636 INFO L350 Elim1Store]: Elim1 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 149 treesize of output 132 [2023-08-31 03:25:59,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:59,645 INFO L350 Elim1Store]: Elim1 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 132 treesize of output 119 [2023-08-31 03:25:59,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:59,653 INFO L350 Elim1Store]: Elim1 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 119 treesize of output 93 [2023-08-31 03:25:59,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:25:59,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 110 [2023-08-31 03:25:59,727 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-31 03:25:59,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 243 [2023-08-31 03:25:59,763 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-31 03:25:59,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 188 [2023-08-31 03:25:59,799 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-31 03:25:59,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 137 [2023-08-31 03:26:00,377 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-31 03:26:00,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 1 [2023-08-31 03:26:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:00,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120820208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:00,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:00,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-31 03:26:00,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600439383] [2023-08-31 03:26:00,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:00,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-31 03:26:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:00,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-31 03:26:00,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1561, Unknown=17, NotChecked=0, Total=1806 [2023-08-31 03:26:03,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:26:05,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-31 03:26:05,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 737 transitions, 18788 flow. Second operand has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:05,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:05,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-31 03:26:05,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:09,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:26:11,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:26:11,392 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse18 (* 4 c_~q_back~0)) (.cse19 (* c_~q_front~0 4)) (.cse24 (+ c_~q_front~0 1))) (let ((.cse0 (< .cse24 0)) (.cse3 (<= c_~n~0 .cse24)) (.cse7 (+ .cse19 c_~q~0.offset 4)) (.cse6 (+ .cse19 c_~q~0.offset)) (.cse4 (forall ((~C~0 Int)) (let ((.cse23 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse23) 4294967296) (mod (+ c_~y~0 .cse23) 4294967296))))) (.cse8 (+ c_~q~0.offset .cse18 4)) (.cse2 (+ c_~q~0.offset .cse18)) (.cse9 (< c_~q_back~0 0)) (.cse10 (< c_~n~0 (+ 3 c_~q_back~0)))) (and (let ((.cse1 (select |c_#memory_int| c_~q~0.base))) (or .cse0 (not (= (select .cse1 .cse2) 1)) .cse3 (let ((.cse5 (+ (select .cse1 .cse6) (select .cse1 .cse7)))) (and .cse4 (< .cse5 3) (< 1 .cse5))) (not (= (select .cse1 .cse8) 1)) .cse9 .cse10)) (or .cse0 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse3 (let ((.cse15 (+ .cse19 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse16 (+ .cse19 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse12 (+ .cse18 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse13 (+ .cse18 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1370 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1369) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1370) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse11 .cse12) 1)) (not (= (select .cse11 .cse13) 1))))) .cse4) (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1370 (Array Int Int))) (let ((.cse14 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1369) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1370) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse14 .cse12) 1)) (not (= (select .cse14 .cse13) 1)) (< (+ (select .cse14 .cse15) (select .cse14 .cse16)) 3)))) (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1370 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1369) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1370) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< 1 (+ (select .cse17 .cse15) (select .cse17 .cse16))) (not (= (select .cse17 .cse12) 1)) (not (= (select .cse17 .cse13) 1))))))) .cse9 .cse10) (or .cse0 .cse3 (and (forall ((v_ArrVal_1370 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1370) c_~q~0.base))) (or (not (= (select .cse20 .cse8) 1)) (< (+ (select .cse20 .cse7) (select .cse20 .cse6)) 3) (not (= (select .cse20 .cse2) 1))))) (forall ((v_ArrVal_1370 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1370) c_~q~0.base))) (or (< 1 (+ (select .cse21 .cse7) (select .cse21 .cse6))) (not (= (select .cse21 .cse8) 1)) (not (= (select .cse21 .cse2) 1))))) (or .cse4 (forall ((v_ArrVal_1370 (Array Int Int))) (let ((.cse22 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1370) c_~q~0.base))) (or (not (= (select .cse22 .cse8) 1)) (not (= (select .cse22 .cse2) 1))))))) .cse9 .cse10)))) is different from false [2023-08-31 03:26:23,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:26:26,152 INFO L130 PetriNetUnfolder]: 1963/3959 cut-off events. [2023-08-31 03:26:26,152 INFO L131 PetriNetUnfolder]: For 114446/114446 co-relation queries the response was YES. [2023-08-31 03:26:26,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44060 conditions, 3959 events. 1963/3959 cut-off events. For 114446/114446 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27825 event pairs, 446 based on Foata normal form. 2/3961 useless extension candidates. Maximal degree in co-relation 43929. Up to 3496 conditions per place. [2023-08-31 03:26:26,199 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 685 selfloop transitions, 158 changer transitions 44/887 dead transitions. [2023-08-31 03:26:26,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 887 transitions, 23746 flow [2023-08-31 03:26:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 03:26:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 03:26:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2679 transitions. [2023-08-31 03:26:26,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26717861773212326 [2023-08-31 03:26:26,201 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2679 transitions. [2023-08-31 03:26:26,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2679 transitions. [2023-08-31 03:26:26,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:26,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2679 transitions. [2023-08-31 03:26:26,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 72.4054054054054) internal successors, (2679), 37 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:26,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:26,208 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:26,208 INFO L175 Difference]: Start difference. First operand has 405 places, 737 transitions, 18788 flow. Second operand 37 states and 2679 transitions. [2023-08-31 03:26:26,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 887 transitions, 23746 flow [2023-08-31 03:26:26,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 887 transitions, 23423 flow, removed 21 selfloop flow, removed 19 redundant places. [2023-08-31 03:26:26,777 INFO L231 Difference]: Finished difference. Result has 429 places, 791 transitions, 20884 flow [2023-08-31 03:26:26,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=18525, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20884, PETRI_PLACES=429, PETRI_TRANSITIONS=791} [2023-08-31 03:26:26,778 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 408 predicate places. [2023-08-31 03:26:26,778 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 791 transitions, 20884 flow [2023-08-31 03:26:26,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:26,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:26,779 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:26:26,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-31 03:26:26,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-31 03:26:26,979 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:26:26,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:26,980 INFO L85 PathProgramCache]: Analyzing trace with hash 79078061, now seen corresponding path program 30 times [2023-08-31 03:26:26,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:26,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150978430] [2023-08-31 03:26:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:26,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:28,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:28,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150978430] [2023-08-31 03:26:28,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150978430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:28,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824372096] [2023-08-31 03:26:28,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:26:28,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:28,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:28,061 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:26:28,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 03:26:28,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:26:28,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:26:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-31 03:26:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:26:28,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:29,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:26:29,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-08-31 03:26:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:26:29,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824372096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:29,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:29,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 34 [2023-08-31 03:26:29,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759613812] [2023-08-31 03:26:29,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:29,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:26:29,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:26:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2023-08-31 03:26:32,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:26:36,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 271 [2023-08-31 03:26:36,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 791 transitions, 20884 flow. Second operand has 36 states, 36 states have (on average 86.69444444444444) internal successors, (3121), 36 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:36,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:36,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 271 [2023-08-31 03:26:36,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:40,112 INFO L130 PetriNetUnfolder]: 1987/4028 cut-off events. [2023-08-31 03:26:40,112 INFO L131 PetriNetUnfolder]: For 118313/118313 co-relation queries the response was YES. [2023-08-31 03:26:40,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45043 conditions, 4028 events. 1987/4028 cut-off events. For 118313/118313 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28594 event pairs, 437 based on Foata normal form. 6/4034 useless extension candidates. Maximal degree in co-relation 44904. Up to 3385 conditions per place. [2023-08-31 03:26:40,161 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 663 selfloop transitions, 197 changer transitions 51/911 dead transitions. [2023-08-31 03:26:40,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 911 transitions, 24633 flow [2023-08-31 03:26:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 03:26:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 03:26:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3656 transitions. [2023-08-31 03:26:40,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3290432904329043 [2023-08-31 03:26:40,165 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3656 transitions. [2023-08-31 03:26:40,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3656 transitions. [2023-08-31 03:26:40,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:40,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3656 transitions. [2023-08-31 03:26:40,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 89.17073170731707) internal successors, (3656), 41 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:40,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:40,176 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:40,176 INFO L175 Difference]: Start difference. First operand has 429 places, 791 transitions, 20884 flow. Second operand 41 states and 3656 transitions. [2023-08-31 03:26:40,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 911 transitions, 24633 flow [2023-08-31 03:26:40,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 911 transitions, 24418 flow, removed 40 selfloop flow, removed 26 redundant places. [2023-08-31 03:26:40,869 INFO L231 Difference]: Finished difference. Result has 451 places, 807 transitions, 21680 flow [2023-08-31 03:26:40,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=20681, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21680, PETRI_PLACES=451, PETRI_TRANSITIONS=807} [2023-08-31 03:26:40,870 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 430 predicate places. [2023-08-31 03:26:40,870 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 807 transitions, 21680 flow [2023-08-31 03:26:40,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.69444444444444) internal successors, (3121), 36 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:40,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:40,871 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:26:40,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 03:26:41,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:41,071 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:26:41,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash -94169631, now seen corresponding path program 31 times [2023-08-31 03:26:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737623643] [2023-08-31 03:26:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:41,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:41,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737623643] [2023-08-31 03:26:41,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737623643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:41,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257231950] [2023-08-31 03:26:41,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:26:41,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:41,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:41,993 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:26:41,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 03:26:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-31 03:26:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:42,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:26:43,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:26:43,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 69 [2023-08-31 03:26:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:44,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257231950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:26:44,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:26:44,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-31 03:26:44,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401065091] [2023-08-31 03:26:44,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:26:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 03:26:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:26:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 03:26:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2023-08-31 03:26:47,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-08-31 03:26:47,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 807 transitions, 21680 flow. Second operand has 40 states, 40 states have (on average 89.55) internal successors, (3582), 40 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:47,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:26:47,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-08-31 03:26:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:26:54,648 INFO L130 PetriNetUnfolder]: 1972/3964 cut-off events. [2023-08-31 03:26:54,648 INFO L131 PetriNetUnfolder]: For 120317/120317 co-relation queries the response was YES. [2023-08-31 03:26:54,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44925 conditions, 3964 events. 1972/3964 cut-off events. For 120317/120317 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28139 event pairs, 236 based on Foata normal form. 2/3966 useless extension candidates. Maximal degree in co-relation 44784. Up to 1392 conditions per place. [2023-08-31 03:26:54,702 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 399 selfloop transitions, 460 changer transitions 28/887 dead transitions. [2023-08-31 03:26:54,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 887 transitions, 24662 flow [2023-08-31 03:26:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:26:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:26:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3050 transitions. [2023-08-31 03:26:54,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34104886503410486 [2023-08-31 03:26:54,706 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3050 transitions. [2023-08-31 03:26:54,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3050 transitions. [2023-08-31 03:26:54,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:26:54,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3050 transitions. [2023-08-31 03:26:54,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 92.42424242424242) internal successors, (3050), 33 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:54,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:54,712 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:54,712 INFO L175 Difference]: Start difference. First operand has 451 places, 807 transitions, 21680 flow. Second operand 33 states and 3050 transitions. [2023-08-31 03:26:54,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 887 transitions, 24662 flow [2023-08-31 03:26:55,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 887 transitions, 24173 flow, removed 33 selfloop flow, removed 27 redundant places. [2023-08-31 03:26:55,369 INFO L231 Difference]: Finished difference. Result has 452 places, 818 transitions, 22528 flow [2023-08-31 03:26:55,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=21210, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22528, PETRI_PLACES=452, PETRI_TRANSITIONS=818} [2023-08-31 03:26:55,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-08-31 03:26:55,370 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 818 transitions, 22528 flow [2023-08-31 03:26:55,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 89.55) internal successors, (3582), 40 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:26:55,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:26:55,371 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:26:55,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-31 03:26:55,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:55,571 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:26:55,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:26:55,572 INFO L85 PathProgramCache]: Analyzing trace with hash -531818569, now seen corresponding path program 32 times [2023-08-31 03:26:55,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:26:55,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991279833] [2023-08-31 03:26:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:26:55,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:26:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:26:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:56,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:26:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991279833] [2023-08-31 03:26:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991279833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:26:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604053715] [2023-08-31 03:26:56,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:26:56,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:26:56,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:26:56,679 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:26:56,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-31 03:26:56,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:26:56,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:26:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-31 03:26:56,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:26:56,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:26:57,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:26:57,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-31 03:26:57,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 03:26:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:26:57,480 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 30 [2023-08-31 03:26:57,945 INFO L321 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-31 03:26:57,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-08-31 03:26:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:26:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:27:05,830 WARN L222 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:27:12,179 INFO L321 Elim1Store]: treesize reduction 156, result has 49.2 percent of original size [2023-08-31 03:27:12,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 502 treesize of output 420 [2023-08-31 03:27:12,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 424 treesize of output 403 [2023-08-31 03:27:12,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:27:12,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 368 treesize of output 388 [2023-08-31 03:27:12,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:27:12,294 INFO L350 Elim1Store]: Elim1 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 343 treesize of output 328 [2023-08-31 03:27:12,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:27:12,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 354 treesize of output 437 [2023-08-31 03:27:12,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 281 [2023-08-31 03:27:12,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:27:12,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 316 treesize of output 335 [2023-08-31 03:27:12,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:27:12,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 522 treesize of output 577 [2023-08-31 03:27:12,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:27:12,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 338 treesize of output 358 [2023-08-31 03:27:12,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:27:12,891 INFO L350 Elim1Store]: Elim1 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 313 treesize of output 298 [2023-08-31 03:29:31,573 WARN L222 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 518 DAG size of output: 601 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15