./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:17:31,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:17:31,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:17:31,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:17:31,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:17:31,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:17:31,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:17:31,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:17:31,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:17:31,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:17:31,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:17:31,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:17:31,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:17:31,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:17:31,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:17:31,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:17:31,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:17:31,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:17:31,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:17:31,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:17:31,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:17:31,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:17:31,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:17:31,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:17:31,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:17:31,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:17:31,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:17:31,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:17:31,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:17:31,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:17:31,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:17:31,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:17:31,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:17:31,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:17:31,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:17:31,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:17:31,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:17:31,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:17:31,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:17:31,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:17:31,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:17:31,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:17:31,556 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:17:31,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:17:31,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:17:31,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:17:31,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:17:31,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:17:31,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:17:31,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:17:31,560 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:17:31,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:17:31,561 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:17:31,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:17:31,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:17:31,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:17:31,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:17:31,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:17:31,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:17:31,562 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:17:31,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:17:31,562 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:17:31,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:17:31,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:17:31,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:17:31,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:17:31,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:17:31,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:17:31,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:17:31,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:17:31,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:17:31,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:17:31,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:17:31,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:17:31,565 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:17:31,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:17:31,565 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:17:31,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:17:31,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:17:31,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:17:31,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:17:31,905 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:17:31,905 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:17:31,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 21:17:33,158 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:17:33,349 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:17:33,349 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 21:17:33,354 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25600bfb3/0d8490874dea4b1c80329b61a8c3ae85/FLAG9fa8daf8e [2023-08-30 21:17:33,363 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25600bfb3/0d8490874dea4b1c80329b61a8c3ae85 [2023-08-30 21:17:33,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:17:33,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:17:33,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:17:33,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:17:33,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:17:33,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ced5b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33, skipping insertion in model container [2023-08-30 21:17:33,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:17:33,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:17:33,572 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-prod-cons.wvr.c[3056,3069] [2023-08-30 21:17:33,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:17:33,599 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:17:33,635 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-prod-cons.wvr.c[3056,3069] [2023-08-30 21:17:33,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:17:33,654 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:17:33,654 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:17:33,660 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:17:33,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33 WrapperNode [2023-08-30 21:17:33,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:17:33,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:17:33,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:17:33,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:17:33,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,714 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 170 [2023-08-30 21:17:33,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:17:33,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:17:33,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:17:33,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:17:33,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,758 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:17:33,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:17:33,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:17:33,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:17:33,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (1/1) ... [2023-08-30 21:17:33,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:17:33,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:17:33,795 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) [2023-08-30 21:17:33,810 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 [2023-08-30 21:17:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:17:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:17:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:17:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:17:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:17:33,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:17:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:17:33,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:17:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 21:17:33,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 21:17:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:17:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:17:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:17:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:17:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:17:33,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:17:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:17:33,837 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:17:33,975 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:17:33,977 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:17:34,247 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:17:34,344 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:17:34,344 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:17:34,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:17:34 BoogieIcfgContainer [2023-08-30 21:17:34,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:17:34,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:17:34,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:17:34,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:17:34,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:17:33" (1/3) ... [2023-08-30 21:17:34,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8ddadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:17:34, skipping insertion in model container [2023-08-30 21:17:34,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:17:33" (2/3) ... [2023-08-30 21:17:34,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8ddadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:17:34, skipping insertion in model container [2023-08-30 21:17:34,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:17:34" (3/3) ... [2023-08-30 21:17:34,354 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-08-30 21:17:34,361 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:17:34,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:17:34,370 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:17:34,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:17:34,431 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 21:17:34,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 148 transitions, 320 flow [2023-08-30 21:17:34,600 INFO L130 PetriNetUnfolder]: 11/145 cut-off events. [2023-08-30 21:17:34,600 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:17:34,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 11/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2023-08-30 21:17:34,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 148 transitions, 320 flow [2023-08-30 21:17:34,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 135 transitions, 288 flow [2023-08-30 21:17:34,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:17:34,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 135 transitions, 288 flow [2023-08-30 21:17:34,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 135 transitions, 288 flow [2023-08-30 21:17:34,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 135 transitions, 288 flow [2023-08-30 21:17:34,686 INFO L130 PetriNetUnfolder]: 11/135 cut-off events. [2023-08-30 21:17:34,690 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:17:34,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 11/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2023-08-30 21:17:34,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 1082 [2023-08-30 21:17:39,304 INFO L134 LiptonReduction]: Checked pairs total: 2030 [2023-08-30 21:17:39,305 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-30 21:17:39,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:17:39,321 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;@1c08e0d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:17:39,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 21:17:39,326 INFO L130 PetriNetUnfolder]: 3/24 cut-off events. [2023-08-30 21:17:39,326 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:17:39,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:17:39,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:17:39,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:17:39,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:17:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1050761945, now seen corresponding path program 1 times [2023-08-30 21:17:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:17:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212629263] [2023-08-30 21:17:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:39,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:17:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:39,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:17:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212629263] [2023-08-30 21:17:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212629263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:17:39,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:17:39,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:17:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793687532] [2023-08-30 21:17:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:17:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:17:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:17:39,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:17:39,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:17:39,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-08-30 21:17:39,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:39,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:17:39,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-08-30 21:17:39,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:40,045 INFO L130 PetriNetUnfolder]: 238/394 cut-off events. [2023-08-30 21:17:40,045 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-08-30 21:17:40,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 394 events. 238/394 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 14 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 687. Up to 129 conditions per place. [2023-08-30 21:17:40,049 INFO L137 encePairwiseOnDemand]: 278/283 looper letters, 44 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-08-30 21:17:40,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 230 flow [2023-08-30 21:17:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:17:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:17:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-30 21:17:40,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812720848056537 [2023-08-30 21:17:40,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-30 21:17:40,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-30 21:17:40,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:40,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-30 21:17:40,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,080 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,081 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 681 transitions. [2023-08-30 21:17:40,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 230 flow [2023-08-30 21:17:40,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 21:17:40,085 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 84 flow [2023-08-30 21:17:40,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-30 21:17:40,089 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 21:17:40,090 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 84 flow [2023-08-30 21:17:40,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:17:40,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:17:40,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:17:40,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:17:40,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:17:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash 982828987, now seen corresponding path program 2 times [2023-08-30 21:17:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:17:40,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388809577] [2023-08-30 21:17:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:40,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:17:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:40,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:17:40,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388809577] [2023-08-30 21:17:40,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388809577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:17:40,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:17:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:17:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642332343] [2023-08-30 21:17:40,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:17:40,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:17:40,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:17:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:17:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:17:40,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 283 [2023-08-30 21:17:40,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:17:40,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 283 [2023-08-30 21:17:40,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:40,686 INFO L130 PetriNetUnfolder]: 530/812 cut-off events. [2023-08-30 21:17:40,686 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2023-08-30 21:17:40,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 812 events. 530/812 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3315 event pairs, 36 based on Foata normal form. 20/715 useless extension candidates. Maximal degree in co-relation 705. Up to 298 conditions per place. [2023-08-30 21:17:40,692 INFO L137 encePairwiseOnDemand]: 276/283 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-08-30 21:17:40,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 300 flow [2023-08-30 21:17:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:17:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:17:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 918 transitions. [2023-08-30 21:17:40,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634023220595659 [2023-08-30 21:17:40,697 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 918 transitions. [2023-08-30 21:17:40,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 918 transitions. [2023-08-30 21:17:40,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:40,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 918 transitions. [2023-08-30 21:17:40,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.14285714285714) internal successors, (918), 7 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,707 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,708 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 84 flow. Second operand 7 states and 918 transitions. [2023-08-30 21:17:40,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 300 flow [2023-08-30 21:17:40,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:17:40,711 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 98 flow [2023-08-30 21:17:40,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-30 21:17:40,713 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-30 21:17:40,713 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 98 flow [2023-08-30 21:17:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:17:40,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:17:40,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:17:40,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:17:40,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:17:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1712825980, now seen corresponding path program 1 times [2023-08-30 21:17:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:17:40,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750982800] [2023-08-30 21:17:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:17:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:17:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750982800] [2023-08-30 21:17:40,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750982800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:17:40,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:17:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:17:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816508552] [2023-08-30 21:17:40,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:17:40,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:17:40,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:17:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:17:40,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:17:40,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-08-30 21:17:40,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:17:40,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-08-30 21:17:40,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:40,952 INFO L130 PetriNetUnfolder]: 205/384 cut-off events. [2023-08-30 21:17:40,952 INFO L131 PetriNetUnfolder]: For 483/483 co-relation queries the response was YES. [2023-08-30 21:17:40,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 384 events. 205/384 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1426 event pairs, 87 based on Foata normal form. 14/354 useless extension candidates. Maximal degree in co-relation 662. Up to 264 conditions per place. [2023-08-30 21:17:40,955 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 28 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-08-30 21:17:40,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 196 flow [2023-08-30 21:17:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:17:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:17:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-30 21:17:40,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48527679623085984 [2023-08-30 21:17:40,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-30 21:17:40,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-30 21:17:40,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:40,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-30 21:17:40,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,961 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 98 flow. Second operand 3 states and 412 transitions. [2023-08-30 21:17:40,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 196 flow [2023-08-30 21:17:40,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 174 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 21:17:40,963 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 92 flow [2023-08-30 21:17:40,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-30 21:17:40,964 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-30 21:17:40,964 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 92 flow [2023-08-30 21:17:40,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:40,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:17:40,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:17:40,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:17:40,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:17:40,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:17:40,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1306821357, now seen corresponding path program 1 times [2023-08-30 21:17:40,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:17:40,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842510904] [2023-08-30 21:17:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:17:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:17:41,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:17:41,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842510904] [2023-08-30 21:17:41,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842510904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:17:41,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:17:41,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:17:41,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842171006] [2023-08-30 21:17:41,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:17:41,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:17:41,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:17:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:17:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:17:41,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 283 [2023-08-30 21:17:41,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:41,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:17:41,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 283 [2023-08-30 21:17:41,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:41,188 INFO L130 PetriNetUnfolder]: 234/450 cut-off events. [2023-08-30 21:17:41,188 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2023-08-30 21:17:41,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 450 events. 234/450 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1779 event pairs, 187 based on Foata normal form. 10/402 useless extension candidates. Maximal degree in co-relation 746. Up to 330 conditions per place. [2023-08-30 21:17:41,191 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 22 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2023-08-30 21:17:41,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 197 flow [2023-08-30 21:17:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:17:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:17:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-30 21:17:41,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47703180212014135 [2023-08-30 21:17:41,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-30 21:17:41,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-30 21:17:41,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:41,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-30 21:17:41,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:41,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:41,197 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:41,198 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 92 flow. Second operand 4 states and 540 transitions. [2023-08-30 21:17:41,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 197 flow [2023-08-30 21:17:41,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:17:41,200 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2023-08-30 21:17:41,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-30 21:17:41,201 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-08-30 21:17:41,201 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2023-08-30 21:17:41,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:41,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:17:41,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:17:41,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:17:41,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:17:41,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:17:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash -372538144, now seen corresponding path program 1 times [2023-08-30 21:17:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:17:41,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304617704] [2023-08-30 21:17:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:41,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:17:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:42,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:17:42,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304617704] [2023-08-30 21:17:42,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304617704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:17:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002436965] [2023-08-30 21:17:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:42,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:17:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:17:42,257 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) [2023-08-30 21:17:42,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:17:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:42,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:17:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:17:42,566 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 [2023-08-30 21:17:42,653 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 6 treesize of output 5 [2023-08-30 21:17:42,814 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 [2023-08-30 21:17:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:17:42,962 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 [2023-08-30 21:17:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:43,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:17:43,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:17:43,778 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 1 case distinctions, treesize of input 65 treesize of output 53 [2023-08-30 21:17:43,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:17:43,799 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 484 treesize of output 460 [2023-08-30 21:17:43,830 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 152 treesize of output 128 [2023-08-30 21:17:43,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:17:43,854 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 126 treesize of output 122 [2023-08-30 21:17:43,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:17:43,869 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 125 treesize of output 109 [2023-08-30 21:17:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:44,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002436965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:17:44,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:17:44,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-08-30 21:17:44,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673793854] [2023-08-30 21:17:44,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:17:44,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:17:44,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:17:44,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:17:44,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1037, Unknown=4, NotChecked=0, Total=1190 [2023-08-30 21:17:44,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-30 21:17:44,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 35 states, 35 states have (on average 73.8) internal successors, (2583), 35 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:44,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:17:44,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-30 21:17:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:46,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:17:50,636 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] [2023-08-30 21:17:51,005 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~v_assert~0 1) (<= 1 c_~v_assert~0) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-08-30 21:17:54,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:17:56,818 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] [2023-08-30 21:17:56,878 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse2 (+ c_~W~0 1))) (and (or (<= |c_thread1Thread1of1ForFork2_~w~0#1| 0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) (< c_~back~0 0)) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) is different from false [2023-08-30 21:17:56,883 WARN L839 $PredicateComparison]: unable to prove that (and (< 0 (mod c_~v_assert~0 256)) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-08-30 21:17:56,995 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse2 (+ c_~W~0 1))) (and (<= 1 |c_thread2Thread1of1ForFork0_~cond~1#1|) (<= c_~v_assert~0 1) (<= |c_thread2Thread1of1ForFork0_~cond~1#1| 1) (or (<= |c_thread1Thread1of1ForFork2_~w~0#1| 0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_128 (Array Int Int)) (v_ArrVal_129 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_128))) (or (not (= (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (< (+ c_~d~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) (< c_~back~0 0)) (<= 1 c_~v_assert~0) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) .cse1)) .cse2)))) is different from false [2023-08-30 21:17:59,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:18:00,038 WARN L839 $PredicateComparison]: unable to prove that (and (< 0 (mod c_~v_assert~0 256)) (< 0 (mod |c_thread2Thread1of1ForFork0_~cond~1#1| 256)) (forall ((v_ArrVal_129 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_129) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-08-30 21:18:02,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:18:04,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:18:06,831 INFO L130 PetriNetUnfolder]: 2617/4407 cut-off events. [2023-08-30 21:18:06,831 INFO L131 PetriNetUnfolder]: For 2497/2497 co-relation queries the response was YES. [2023-08-30 21:18:06,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11703 conditions, 4407 events. 2617/4407 cut-off events. For 2497/2497 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 26207 event pairs, 61 based on Foata normal form. 49/4091 useless extension candidates. Maximal degree in co-relation 11686. Up to 940 conditions per place. [2023-08-30 21:18:06,852 INFO L137 encePairwiseOnDemand]: 266/283 looper letters, 419 selfloop transitions, 237 changer transitions 104/760 dead transitions. [2023-08-30 21:18:06,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 760 transitions, 3819 flow [2023-08-30 21:18:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-08-30 21:18:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2023-08-30 21:18:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 8165 transitions. [2023-08-30 21:18:06,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28011252530103947 [2023-08-30 21:18:06,875 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 8165 transitions. [2023-08-30 21:18:06,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 8165 transitions. [2023-08-30 21:18:06,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:18:06,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 8165 transitions. [2023-08-30 21:18:06,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 79.27184466019418) internal successors, (8165), 103 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:06,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 283.0) internal successors, (29432), 104 states have internal predecessors, (29432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:06,944 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 283.0) internal successors, (29432), 104 states have internal predecessors, (29432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:06,944 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 103 states and 8165 transitions. [2023-08-30 21:18:06,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 760 transitions, 3819 flow [2023-08-30 21:18:06,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 760 transitions, 3791 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-30 21:18:06,963 INFO L231 Difference]: Finished difference. Result has 174 places, 323 transitions, 1990 flow [2023-08-30 21:18:06,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=1990, PETRI_PLACES=174, PETRI_TRANSITIONS=323} [2023-08-30 21:18:06,965 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 142 predicate places. [2023-08-30 21:18:06,965 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 323 transitions, 1990 flow [2023-08-30 21:18:06,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.8) internal successors, (2583), 35 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:06,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:18:06,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:18:06,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 21:18:07,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:07,173 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:18:07,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:18:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1336769804, now seen corresponding path program 2 times [2023-08-30 21:18:07,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:18:07,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904809991] [2023-08-30 21:18:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:18:07,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:18:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:18:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:08,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:18:08,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904809991] [2023-08-30 21:18:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904809991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:18:08,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211585824] [2023-08-30 21:18:08,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:18:08,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:08,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:18:08,155 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) [2023-08-30 21:18:08,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:18:08,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:18:08,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:18:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 21:18:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:18:08,383 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 [2023-08-30 21:18:08,452 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 [2023-08-30 21:18:08,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:18:08,684 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 [2023-08-30 21:18:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:18:08,754 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 [2023-08-30 21:18:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:08,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:18:09,120 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (< (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_178) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) is different from false [2023-08-30 21:18:09,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:18:09,375 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 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-30 21:18:09,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:18:09,400 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 192 treesize of output 184 [2023-08-30 21:18:09,407 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 152 treesize of output 128 [2023-08-30 21:18:09,415 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 128 treesize of output 116 [2023-08-30 21:18:09,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:18:09,430 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 85 treesize of output 81 [2023-08-30 21:18:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:09,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211585824] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:18:09,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:18:09,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-08-30 21:18:09,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697047481] [2023-08-30 21:18:09,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:18:09,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:18:09,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:18:09,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:18:09,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=981, Unknown=5, NotChecked=64, Total=1190 [2023-08-30 21:18:09,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 283 [2023-08-30 21:18:09,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 323 transitions, 1990 flow. Second operand has 35 states, 35 states have (on average 73.88571428571429) internal successors, (2586), 35 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:09,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:18:09,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 283 [2023-08-30 21:18:09,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:18:11,064 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~v_assert~0 1) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (< (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_177) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_178) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) (<= 1 c_~v_assert~0)) is different from false [2023-08-30 21:18:17,918 INFO L130 PetriNetUnfolder]: 3564/6079 cut-off events. [2023-08-30 21:18:17,918 INFO L131 PetriNetUnfolder]: For 77450/77450 co-relation queries the response was YES. [2023-08-30 21:18:17,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31597 conditions, 6079 events. 3564/6079 cut-off events. For 77450/77450 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 38682 event pairs, 201 based on Foata normal form. 64/6100 useless extension candidates. Maximal degree in co-relation 31288. Up to 1644 conditions per place. [2023-08-30 21:18:17,991 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 467 selfloop transitions, 305 changer transitions 127/899 dead transitions. [2023-08-30 21:18:17,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 899 transitions, 7916 flow [2023-08-30 21:18:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-30 21:18:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-30 21:18:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 5786 transitions. [2023-08-30 21:18:18,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28007163947916164 [2023-08-30 21:18:18,067 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 5786 transitions. [2023-08-30 21:18:18,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 5786 transitions. [2023-08-30 21:18:18,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:18:18,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 5786 transitions. [2023-08-30 21:18:18,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 79.26027397260275) internal successors, (5786), 73 states have internal predecessors, (5786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:18,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 283.0) internal successors, (20942), 74 states have internal predecessors, (20942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:18,122 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 283.0) internal successors, (20942), 74 states have internal predecessors, (20942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:18,123 INFO L175 Difference]: Start difference. First operand has 174 places, 323 transitions, 1990 flow. Second operand 73 states and 5786 transitions. [2023-08-30 21:18:18,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 899 transitions, 7916 flow [2023-08-30 21:18:18,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 899 transitions, 7484 flow, removed 115 selfloop flow, removed 8 redundant places. [2023-08-30 21:18:18,377 INFO L231 Difference]: Finished difference. Result has 257 places, 496 transitions, 4255 flow [2023-08-30 21:18:18,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=4255, PETRI_PLACES=257, PETRI_TRANSITIONS=496} [2023-08-30 21:18:18,380 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 225 predicate places. [2023-08-30 21:18:18,380 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 496 transitions, 4255 flow [2023-08-30 21:18:18,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.88571428571429) internal successors, (2586), 35 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:18,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:18:18,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:18:18,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:18:18,587 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,SelfDestructingSolverStorable5 [2023-08-30 21:18:18,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:18:18,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:18:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1696414361, now seen corresponding path program 3 times [2023-08-30 21:18:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:18:18,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177388510] [2023-08-30 21:18:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:18:18,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:18:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:18:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:18:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177388510] [2023-08-30 21:18:19,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177388510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:18:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358207080] [2023-08-30 21:18:19,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:18:19,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:19,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:18:19,500 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) [2023-08-30 21:18:19,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:18:19,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:18:19,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:18:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 21:18:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:18:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:18:19,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:18:20,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:18:20,059 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 28 treesize of output 20 [2023-08-30 21:18:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:18:20,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358207080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:18:20,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:18:20,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2023-08-30 21:18:20,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844256638] [2023-08-30 21:18:20,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:18:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:18:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:18:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:18:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:18:21,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 283 [2023-08-30 21:18:21,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 496 transitions, 4255 flow. Second operand has 28 states, 28 states have (on average 101.42857142857143) internal successors, (2840), 28 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:21,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:18:21,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 283 [2023-08-30 21:18:21,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:18:25,171 INFO L130 PetriNetUnfolder]: 4907/8451 cut-off events. [2023-08-30 21:18:25,171 INFO L131 PetriNetUnfolder]: For 190872/190872 co-relation queries the response was YES. [2023-08-30 21:18:25,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53288 conditions, 8451 events. 4907/8451 cut-off events. For 190872/190872 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 58595 event pairs, 313 based on Foata normal form. 36/8486 useless extension candidates. Maximal degree in co-relation 53126. Up to 1899 conditions per place. [2023-08-30 21:18:25,260 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 564 selfloop transitions, 571 changer transitions 74/1209 dead transitions. [2023-08-30 21:18:25,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1209 transitions, 12937 flow [2023-08-30 21:18:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 21:18:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 21:18:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5061 transitions. [2023-08-30 21:18:25,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37257067137809186 [2023-08-30 21:18:25,269 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5061 transitions. [2023-08-30 21:18:25,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5061 transitions. [2023-08-30 21:18:25,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:18:25,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5061 transitions. [2023-08-30 21:18:25,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 105.4375) internal successors, (5061), 48 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:25,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:25,299 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:25,299 INFO L175 Difference]: Start difference. First operand has 257 places, 496 transitions, 4255 flow. Second operand 48 states and 5061 transitions. [2023-08-30 21:18:25,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1209 transitions, 12937 flow [2023-08-30 21:18:26,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 1209 transitions, 11884 flow, removed 398 selfloop flow, removed 29 redundant places. [2023-08-30 21:18:26,442 INFO L231 Difference]: Finished difference. Result has 280 places, 803 transitions, 8416 flow [2023-08-30 21:18:26,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8416, PETRI_PLACES=280, PETRI_TRANSITIONS=803} [2023-08-30 21:18:26,443 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 248 predicate places. [2023-08-30 21:18:26,444 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 803 transitions, 8416 flow [2023-08-30 21:18:26,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.42857142857143) internal successors, (2840), 28 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:26,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:18:26,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:18:26,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:18:26,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:26,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:18:26,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:18:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1528886425, now seen corresponding path program 4 times [2023-08-30 21:18:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:18:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599799098] [2023-08-30 21:18:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:18:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:18:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:18:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:18:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599799098] [2023-08-30 21:18:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599799098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:18:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475071160] [2023-08-30 21:18:27,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:18:27,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:18:27,701 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) [2023-08-30 21:18:27,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:18:27,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:18:27,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:18:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 21:18:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:18:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:18:28,040 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 [2023-08-30 21:18:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:18:28,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:18:28,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:18:28,422 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 50 treesize of output 42 [2023-08-30 21:18:28,437 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 13 treesize of output 7 [2023-08-30 21:18:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:18:28,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475071160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:18:28,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:18:28,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2023-08-30 21:18:28,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254593755] [2023-08-30 21:18:28,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:18:28,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:18:28,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:18:28,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:18:28,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1042, Unknown=3, NotChecked=0, Total=1190 [2023-08-30 21:18:30,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 283 [2023-08-30 21:18:30,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 803 transitions, 8416 flow. Second operand has 35 states, 35 states have (on average 89.8) internal successors, (3143), 35 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:30,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:18:30,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 283 [2023-08-30 21:18:30,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:18:38,482 INFO L130 PetriNetUnfolder]: 5590/9651 cut-off events. [2023-08-30 21:18:38,482 INFO L131 PetriNetUnfolder]: For 282157/282157 co-relation queries the response was YES. [2023-08-30 21:18:38,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67240 conditions, 9651 events. 5590/9651 cut-off events. For 282157/282157 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 68497 event pairs, 318 based on Foata normal form. 32/9683 useless extension candidates. Maximal degree in co-relation 66913. Up to 2213 conditions per place. [2023-08-30 21:18:38,578 INFO L137 encePairwiseOnDemand]: 268/283 looper letters, 609 selfloop transitions, 639 changer transitions 66/1314 dead transitions. [2023-08-30 21:18:38,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1314 transitions, 15859 flow [2023-08-30 21:18:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 21:18:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 21:18:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4711 transitions. [2023-08-30 21:18:38,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329328621908127 [2023-08-30 21:18:38,710 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4711 transitions. [2023-08-30 21:18:38,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4711 transitions. [2023-08-30 21:18:38,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:18:38,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4711 transitions. [2023-08-30 21:18:38,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 94.22) internal successors, (4711), 50 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:38,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 283.0) internal successors, (14433), 51 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:38,744 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 283.0) internal successors, (14433), 51 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:38,744 INFO L175 Difference]: Start difference. First operand has 280 places, 803 transitions, 8416 flow. Second operand 50 states and 4711 transitions. [2023-08-30 21:18:38,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1314 transitions, 15859 flow [2023-08-30 21:18:39,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1314 transitions, 14971 flow, removed 224 selfloop flow, removed 15 redundant places. [2023-08-30 21:18:39,841 INFO L231 Difference]: Finished difference. Result has 319 places, 928 transitions, 10876 flow [2023-08-30 21:18:39,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10876, PETRI_PLACES=319, PETRI_TRANSITIONS=928} [2023-08-30 21:18:39,842 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 287 predicate places. [2023-08-30 21:18:39,843 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 928 transitions, 10876 flow [2023-08-30 21:18:39,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 89.8) internal successors, (3143), 35 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:39,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:18:39,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:18:39,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:18:40,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:40,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:18:40,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:18:40,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1131417959, now seen corresponding path program 5 times [2023-08-30 21:18:40,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:18:40,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951922300] [2023-08-30 21:18:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:18:40,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:18:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:18:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:41,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:18:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951922300] [2023-08-30 21:18:41,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951922300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:18:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482324794] [2023-08-30 21:18:41,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:18:41,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:18:41,184 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) [2023-08-30 21:18:41,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:18:41,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:18:41,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:18:41,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 21:18:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:18:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:18:41,619 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 [2023-08-30 21:18:41,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:18:41,679 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 [2023-08-30 21:18:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:18:41,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:18:42,062 WARN L839 $PredicateComparison]: unable to prove that (or (= (mod c_~v_assert~0 256) 0) (forall ((v_ArrVal_325 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_325) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1)))) is different from false [2023-08-30 21:18:42,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:18:42,147 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 190 treesize of output 174 [2023-08-30 21:18:42,157 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 35 treesize of output 29 [2023-08-30 21:18:42,164 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 36 treesize of output 24 [2023-08-30 21:18:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:18:42,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482324794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:18:42,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:18:42,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2023-08-30 21:18:42,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637400072] [2023-08-30 21:18:42,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:18:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 21:18:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:18:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 21:18:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1099, Unknown=9, NotChecked=68, Total=1332 [2023-08-30 21:18:42,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 283 [2023-08-30 21:18:42,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 928 transitions, 10876 flow. Second operand has 37 states, 37 states have (on average 76.86486486486487) internal successors, (2844), 37 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:42,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:18:42,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 283 [2023-08-30 21:18:42,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:18:51,649 INFO L130 PetriNetUnfolder]: 6318/10909 cut-off events. [2023-08-30 21:18:51,649 INFO L131 PetriNetUnfolder]: For 325346/325346 co-relation queries the response was YES. [2023-08-30 21:18:51,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79051 conditions, 10909 events. 6318/10909 cut-off events. For 325346/325346 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 78224 event pairs, 291 based on Foata normal form. 32/10941 useless extension candidates. Maximal degree in co-relation 78469. Up to 2680 conditions per place. [2023-08-30 21:18:51,750 INFO L137 encePairwiseOnDemand]: 269/283 looper letters, 627 selfloop transitions, 750 changer transitions 62/1439 dead transitions. [2023-08-30 21:18:51,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1439 transitions, 18475 flow [2023-08-30 21:18:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 21:18:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 21:18:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3896 transitions. [2023-08-30 21:18:51,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2868080094228504 [2023-08-30 21:18:51,758 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3896 transitions. [2023-08-30 21:18:51,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3896 transitions. [2023-08-30 21:18:51,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:18:51,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3896 transitions. [2023-08-30 21:18:51,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 81.16666666666667) internal successors, (3896), 48 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:51,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:51,775 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 283.0) internal successors, (13867), 49 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:51,775 INFO L175 Difference]: Start difference. First operand has 319 places, 928 transitions, 10876 flow. Second operand 48 states and 3896 transitions. [2023-08-30 21:18:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1439 transitions, 18475 flow [2023-08-30 21:18:53,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1439 transitions, 16906 flow, removed 101 selfloop flow, removed 33 redundant places. [2023-08-30 21:18:53,263 INFO L231 Difference]: Finished difference. Result has 338 places, 1031 transitions, 12763 flow [2023-08-30 21:18:53,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=9576, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=647, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=12763, PETRI_PLACES=338, PETRI_TRANSITIONS=1031} [2023-08-30 21:18:53,264 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 306 predicate places. [2023-08-30 21:18:53,264 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1031 transitions, 12763 flow [2023-08-30 21:18:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.86486486486487) internal successors, (2844), 37 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:53,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:18:53,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:18:53,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:18:53,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:53,473 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:18:53,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:18:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1109082783, now seen corresponding path program 6 times [2023-08-30 21:18:53,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:18:53,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952048770] [2023-08-30 21:18:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:18:53,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:18:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:18:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:18:53,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:18:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952048770] [2023-08-30 21:18:53,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952048770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:18:53,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:18:53,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:18:53,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777902844] [2023-08-30 21:18:53,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:18:53,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:18:53,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:18:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:18:53,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:18:53,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-08-30 21:18:53,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1031 transitions, 12763 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:53,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:18:53,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-08-30 21:18:53,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:18:57,779 INFO L130 PetriNetUnfolder]: 8476/16349 cut-off events. [2023-08-30 21:18:57,779 INFO L131 PetriNetUnfolder]: For 536802/538266 co-relation queries the response was YES. [2023-08-30 21:18:57,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122212 conditions, 16349 events. 8476/16349 cut-off events. For 536802/538266 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 145903 event pairs, 1480 based on Foata normal form. 842/16808 useless extension candidates. Maximal degree in co-relation 121550. Up to 6780 conditions per place. [2023-08-30 21:18:57,973 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 982 selfloop transitions, 122 changer transitions 192/1518 dead transitions. [2023-08-30 21:18:57,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1518 transitions, 21064 flow [2023-08-30 21:18:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:18:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:18:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 570 transitions. [2023-08-30 21:18:57,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035335689045937 [2023-08-30 21:18:57,975 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 570 transitions. [2023-08-30 21:18:57,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 570 transitions. [2023-08-30 21:18:57,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:18:57,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 570 transitions. [2023-08-30 21:18:57,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:57,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:57,978 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:18:57,978 INFO L175 Difference]: Start difference. First operand has 338 places, 1031 transitions, 12763 flow. Second operand 4 states and 570 transitions. [2023-08-30 21:18:57,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1518 transitions, 21064 flow [2023-08-30 21:19:00,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 1518 transitions, 20002 flow, removed 46 selfloop flow, removed 33 redundant places. [2023-08-30 21:19:00,270 INFO L231 Difference]: Finished difference. Result has 310 places, 1038 transitions, 12774 flow [2023-08-30 21:19:00,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=11891, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=905, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=12774, PETRI_PLACES=310, PETRI_TRANSITIONS=1038} [2023-08-30 21:19:00,271 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 278 predicate places. [2023-08-30 21:19:00,271 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 1038 transitions, 12774 flow [2023-08-30 21:19:00,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:00,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:19:00,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:19:00,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 21:19:00,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:19:00,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:19:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1511338336, now seen corresponding path program 7 times [2023-08-30 21:19:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:19:00,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657388408] [2023-08-30 21:19:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:19:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:19:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:19:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 21:19:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:19:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657388408] [2023-08-30 21:19:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657388408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:19:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862792007] [2023-08-30 21:19:00,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:19:00,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:19:00,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:19:00,400 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) [2023-08-30 21:19:00,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:19:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:19:00,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:19:00,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:19:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 21:19:00,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:19:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 21:19:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862792007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:19:00,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:19:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 21:19:00,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602633411] [2023-08-30 21:19:00,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:19:00,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:19:00,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:19:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:19:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:19:00,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 283 [2023-08-30 21:19:00,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 1038 transitions, 12774 flow. Second operand has 12 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:00,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:19:00,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 283 [2023-08-30 21:19:00,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:19:04,036 INFO L130 PetriNetUnfolder]: 7240/14089 cut-off events. [2023-08-30 21:19:04,036 INFO L131 PetriNetUnfolder]: For 474834/475930 co-relation queries the response was YES. [2023-08-30 21:19:04,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106442 conditions, 14089 events. 7240/14089 cut-off events. For 474834/475930 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 123081 event pairs, 2952 based on Foata normal form. 205/13978 useless extension candidates. Maximal degree in co-relation 106368. Up to 11261 conditions per place. [2023-08-30 21:19:04,360 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 708 selfloop transitions, 3 changer transitions 51/947 dead transitions. [2023-08-30 21:19:04,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 947 transitions, 13202 flow [2023-08-30 21:19:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:19:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:19:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 778 transitions. [2023-08-30 21:19:04,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581861012956419 [2023-08-30 21:19:04,364 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 778 transitions. [2023-08-30 21:19:04,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 778 transitions. [2023-08-30 21:19:04,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:19:04,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 778 transitions. [2023-08-30 21:19:04,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:04,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:04,368 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:04,368 INFO L175 Difference]: Start difference. First operand has 310 places, 1038 transitions, 12774 flow. Second operand 6 states and 778 transitions. [2023-08-30 21:19:04,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 947 transitions, 13202 flow [2023-08-30 21:19:06,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 947 transitions, 13044 flow, removed 75 selfloop flow, removed 1 redundant places. [2023-08-30 21:19:06,269 INFO L231 Difference]: Finished difference. Result has 296 places, 896 transitions, 11091 flow [2023-08-30 21:19:06,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=11428, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11091, PETRI_PLACES=296, PETRI_TRANSITIONS=896} [2023-08-30 21:19:06,269 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 264 predicate places. [2023-08-30 21:19:06,270 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 896 transitions, 11091 flow [2023-08-30 21:19:06,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:06,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:19:06,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:19:06,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:19:06,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:19:06,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:19:06,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:19:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1376522233, now seen corresponding path program 8 times [2023-08-30 21:19:06,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:19:06,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545465534] [2023-08-30 21:19:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:19:06,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:19:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:19:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:19:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545465534] [2023-08-30 21:19:07,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545465534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:19:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93512562] [2023-08-30 21:19:07,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:19:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:19:07,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:19:07,450 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) [2023-08-30 21:19:07,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:19:07,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:19:07,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:19:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:19:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:19:08,156 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-30 21:19:08,156 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 35 treesize of output 13 [2023-08-30 21:19:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:08,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:19:08,550 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:19:08,550 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 50 treesize of output 53 [2023-08-30 21:19:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:09,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93512562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:19:09,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:19:09,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-08-30 21:19:09,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954454804] [2023-08-30 21:19:09,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:19:09,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 21:19:09,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:19:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 21:19:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 21:19:10,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 283 [2023-08-30 21:19:10,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 896 transitions, 11091 flow. Second operand has 44 states, 44 states have (on average 98.81818181818181) internal successors, (4348), 44 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:10,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:19:10,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 283 [2023-08-30 21:19:10,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:19:37,725 INFO L130 PetriNetUnfolder]: 39013/67143 cut-off events. [2023-08-30 21:19:37,725 INFO L131 PetriNetUnfolder]: For 1982020/1982020 co-relation queries the response was YES. [2023-08-30 21:19:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483382 conditions, 67143 events. 39013/67143 cut-off events. For 1982020/1982020 co-relation queries the response was YES. Maximal size of possible extension queue 2326. Compared 603408 event pairs, 2525 based on Foata normal form. 483/67626 useless extension candidates. Maximal degree in co-relation 483307. Up to 11191 conditions per place. [2023-08-30 21:19:38,859 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 1699 selfloop transitions, 2946 changer transitions 935/5580 dead transitions. [2023-08-30 21:19:38,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 5580 transitions, 74006 flow [2023-08-30 21:19:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-08-30 21:19:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2023-08-30 21:19:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 15738 transitions. [2023-08-30 21:19:38,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37074204946996464 [2023-08-30 21:19:38,875 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 15738 transitions. [2023-08-30 21:19:38,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 15738 transitions. [2023-08-30 21:19:38,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:19:38,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 15738 transitions. [2023-08-30 21:19:38,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 104.92) internal successors, (15738), 150 states have internal predecessors, (15738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:38,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 283.0) internal successors, (42733), 151 states have internal predecessors, (42733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:38,930 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 283.0) internal successors, (42733), 151 states have internal predecessors, (42733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:38,931 INFO L175 Difference]: Start difference. First operand has 296 places, 896 transitions, 11091 flow. Second operand 150 states and 15738 transitions. [2023-08-30 21:19:38,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 5580 transitions, 74006 flow [2023-08-30 21:19:51,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 5580 transitions, 73610 flow, removed 195 selfloop flow, removed 11 redundant places. [2023-08-30 21:19:51,456 INFO L231 Difference]: Finished difference. Result has 488 places, 3483 transitions, 53816 flow [2023-08-30 21:19:51,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=11057, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=576, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=53816, PETRI_PLACES=488, PETRI_TRANSITIONS=3483} [2023-08-30 21:19:51,457 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 456 predicate places. [2023-08-30 21:19:51,457 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 3483 transitions, 53816 flow [2023-08-30 21:19:51,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 98.81818181818181) internal successors, (4348), 44 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:51,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:19:51,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:19:51,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:19:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:19:51,665 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:19:51,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:19:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1628322177, now seen corresponding path program 9 times [2023-08-30 21:19:51,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:19:51,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469369360] [2023-08-30 21:19:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:19:51,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:19:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:19:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:52,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:19:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469369360] [2023-08-30 21:19:52,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469369360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:19:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109230126] [2023-08-30 21:19:52,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:19:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:19:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:19:52,593 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) [2023-08-30 21:19:52,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:19:52,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:19:52,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:19:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:19:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:19:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:19:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:19:53,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:19:53,627 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 13 [2023-08-30 21:19:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:53,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:19:54,109 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:19:54,109 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 50 treesize of output 53 [2023-08-30 21:19:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:54,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109230126] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:19:54,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:19:54,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 44 [2023-08-30 21:19:54,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528239026] [2023-08-30 21:19:54,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:19:54,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 21:19:54,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:19:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 21:19:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 21:19:56,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 283 [2023-08-30 21:19:56,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 3483 transitions, 53816 flow. Second operand has 45 states, 45 states have (on average 98.82222222222222) internal successors, (4447), 45 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:56,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:19:56,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 283 [2023-08-30 21:19:56,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:21:44,255 INFO L130 PetriNetUnfolder]: 89932/154775 cut-off events. [2023-08-30 21:21:44,255 INFO L131 PetriNetUnfolder]: For 7661285/7661285 co-relation queries the response was YES. [2023-08-30 21:21:48,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381391 conditions, 154775 events. 89932/154775 cut-off events. For 7661285/7661285 co-relation queries the response was YES. Maximal size of possible extension queue 4654. Compared 1519788 event pairs, 9692 based on Foata normal form. 1156/155931 useless extension candidates. Maximal degree in co-relation 1381252. Up to 28941 conditions per place. [2023-08-30 21:21:49,597 INFO L137 encePairwiseOnDemand]: 267/283 looper letters, 3141 selfloop transitions, 7936 changer transitions 2809/13886 dead transitions. [2023-08-30 21:21:49,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 13886 transitions, 242235 flow [2023-08-30 21:21:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2023-08-30 21:21:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2023-08-30 21:21:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 20411 transitions. [2023-08-30 21:21:49,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698649995469783 [2023-08-30 21:21:49,613 INFO L72 ComplementDD]: Start complementDD. Operand 195 states and 20411 transitions. [2023-08-30 21:21:49,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 195 states and 20411 transitions. [2023-08-30 21:21:49,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:21:49,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 195 states and 20411 transitions. [2023-08-30 21:21:49,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 196 states, 195 states have (on average 104.67179487179487) internal successors, (20411), 195 states have internal predecessors, (20411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:21:49,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 196 states, 196 states have (on average 283.0) internal successors, (55468), 196 states have internal predecessors, (55468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:21:49,690 INFO L81 ComplementDD]: Finished complementDD. Result has 196 states, 196 states have (on average 283.0) internal successors, (55468), 196 states have internal predecessors, (55468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:21:49,690 INFO L175 Difference]: Start difference. First operand has 488 places, 3483 transitions, 53816 flow. Second operand 195 states and 20411 transitions. [2023-08-30 21:21:49,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 13886 transitions, 242235 flow [2023-08-30 21:29:40,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 13886 transitions, 214113 flow, removed 12427 selfloop flow, removed 24 redundant places. [2023-08-30 21:29:40,853 INFO L231 Difference]: Finished difference. Result has 743 places, 9170 transitions, 157639 flow [2023-08-30 21:29:40,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=46728, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=195, PETRI_FLOW=157639, PETRI_PLACES=743, PETRI_TRANSITIONS=9170} [2023-08-30 21:29:40,856 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 711 predicate places. [2023-08-30 21:29:40,856 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 9170 transitions, 157639 flow [2023-08-30 21:29:40,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 98.82222222222222) internal successors, (4447), 45 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:40,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:29:40,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:29:40,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:29:41,063 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,SelfDestructingSolverStorable12 [2023-08-30 21:29:41,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:29:41,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:29:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 802123443, now seen corresponding path program 10 times [2023-08-30 21:29:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:29:41,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509705810] [2023-08-30 21:29:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:29:41,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:29:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:29:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:41,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:29:41,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509705810] [2023-08-30 21:29:41,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509705810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:29:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577864590] [2023-08-30 21:29:41,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:29:41,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:29:41,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:29:41,916 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) [2023-08-30 21:29:41,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:29:42,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:29:42,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:29:42,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 21:29:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:29:42,623 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-30 21:29:42,623 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 35 treesize of output 13 [2023-08-30 21:29:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:42,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:29:43,182 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:29:43,182 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 50 treesize of output 53 [2023-08-30 21:29:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:29:43,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577864590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:29:43,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:29:43,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-08-30 21:29:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458647872] [2023-08-30 21:29:43,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:29:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 21:29:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:29:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 21:29:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 21:29:45,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 283 [2023-08-30 21:29:45,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 9170 transitions, 157639 flow. Second operand has 44 states, 44 states have (on average 98.86363636363636) internal successors, (4350), 44 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:29:45,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:29:45,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 283 [2023-08-30 21:29:45,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15