./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations 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-more-queue-add-2-nl.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:59:18,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:59:18,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:59:18,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:59:18,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:59:18,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:59:18,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:59:18,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:59:18,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:59:18,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:59:18,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:59:18,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:59:18,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:59:18,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:59:18,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:59:18,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:59:18,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:59:18,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:59:18,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:59:18,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:59:18,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:59:18,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:59:18,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:59:18,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:59:18,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:59:18,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:59:18,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:59:18,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:59:18,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:59:18,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:59:18,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:59:18,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:59:18,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:59:18,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:59:18,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:59:18,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:59:18,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:59:18,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:59:18,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:59:18,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:59:18,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:59:18,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:59:18,711 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:59:18,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:59:18,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:59:18,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:59:18,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:59:18,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:59:18,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:59:18,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:59:18,714 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:59:18,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:59:18,715 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:59:18,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:59:18,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:59:18,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:59:18,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:59:18,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:59:18,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:59:18,717 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:59:18,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:59:18,717 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:59:18,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:59:18,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:59:18,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:59:18,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:59:18,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:59:18,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:59:18,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:59:18,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:59:18,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:59:18,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:59:18,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:59:18,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:59:18,720 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:59:18,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:59:18,720 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:59:18,720 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:59:19,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:59:19,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:59:19,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:59:19,031 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:59:19,032 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:59:19,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-30 20:59:20,111 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:59:20,325 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:59:20,325 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-30 20:59:20,331 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21fbab12b/e71b418603e34b1dac7de889863f02c6/FLAG0e2282f1b [2023-08-30 20:59:20,344 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21fbab12b/e71b418603e34b1dac7de889863f02c6 [2023-08-30 20:59:20,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:59:20,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:59:20,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:59:20,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:59:20,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:59:20,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62dda16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20, skipping insertion in model container [2023-08-30 20:59:20,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:59:20,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:59:20,520 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-30 20:59:20,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:59:20,535 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:59:20,552 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-30 20:59:20,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:59:20,562 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:59:20,562 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:59:20,567 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:59:20,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20 WrapperNode [2023-08-30 20:59:20,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:59:20,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:59:20,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:59:20,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:59:20,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,607 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 168 [2023-08-30 20:59:20,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:59:20,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:59:20,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:59:20,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:59:20,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,635 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:59:20,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:59:20,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:59:20,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:59:20,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (1/1) ... [2023-08-30 20:59:20,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:59:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:20,670 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 20:59:20,697 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 20:59:20,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:59:20,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:59:20,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:59:20,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:59:20,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:59:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:59:20,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:59:20,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:59:20,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:59:20,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:59:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:59:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:59:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:59:20,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:59:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:59:20,716 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 20:59:20,836 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:59:20,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:59:21,157 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:59:21,289 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:59:21,294 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 20:59:21,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:59:21 BoogieIcfgContainer [2023-08-30 20:59:21,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:59:21,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:59:21,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:59:21,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:59:21,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:59:20" (1/3) ... [2023-08-30 20:59:21,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf7d885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:59:21, skipping insertion in model container [2023-08-30 20:59:21,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:59:20" (2/3) ... [2023-08-30 20:59:21,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf7d885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:59:21, skipping insertion in model container [2023-08-30 20:59:21,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:59:21" (3/3) ... [2023-08-30 20:59:21,317 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-08-30 20:59:21,324 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:59:21,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:59:21,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:59:21,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:59:21,456 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:59:21,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 292 flow [2023-08-30 20:59:21,598 INFO L130 PetriNetUnfolder]: 11/136 cut-off events. [2023-08-30 20:59:21,598 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:59:21,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 136 events. 11/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-08-30 20:59:21,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 292 flow [2023-08-30 20:59:21,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 128 transitions, 268 flow [2023-08-30 20:59:21,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:59:21,633 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 128 transitions, 268 flow [2023-08-30 20:59:21,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 128 transitions, 268 flow [2023-08-30 20:59:21,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 268 flow [2023-08-30 20:59:21,687 INFO L130 PetriNetUnfolder]: 11/128 cut-off events. [2023-08-30 20:59:21,687 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:59:21,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-08-30 20:59:21,690 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-08-30 20:59:26,148 INFO L134 LiptonReduction]: Checked pairs total: 839 [2023-08-30 20:59:26,149 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-30 20:59:26,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:59:26,164 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;@74d6bb9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:59:26,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:59:26,175 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 20:59:26,175 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:59:26,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:26,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:26,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:26,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash -272600085, now seen corresponding path program 1 times [2023-08-30 20:59:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:26,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487007108] [2023-08-30 20:59:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:26,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:26,653 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 20:59:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487007108] [2023-08-30 20:59:26,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487007108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:59:26,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:59:26,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:59:26,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919278965] [2023-08-30 20:59:26,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:59:26,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:59:26,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:59:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:59:26,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2023-08-30 20:59:26,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:26,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2023-08-30 20:59:26,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:26,790 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2023-08-30 20:59:26,791 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 20:59:26,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 24 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2023-08-30 20:59:26,793 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2023-08-30 20:59:26,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2023-08-30 20:59:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:59:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:59:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-30 20:59:26,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45295202952029523 [2023-08-30 20:59:26,807 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-30 20:59:26,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-30 20:59:26,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:26,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-30 20:59:26,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,820 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,821 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 491 transitions. [2023-08-30 20:59:26,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2023-08-30 20:59:26,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:59:26,825 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-08-30 20:59:26,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-08-30 20:59:26,830 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-30 20:59:26,830 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-08-30 20:59:26,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:26,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:26,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:59:26,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:26,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash -799736851, now seen corresponding path program 1 times [2023-08-30 20:59:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786184067] [2023-08-30 20:59:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:59:27,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:27,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786184067] [2023-08-30 20:59:27,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786184067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:59:27,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:59:27,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 20:59:27,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061876431] [2023-08-30 20:59:27,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:59:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:59:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:59:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:59:27,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2023-08-30 20:59:27,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:27,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:27,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2023-08-30 20:59:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:27,750 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2023-08-30 20:59:27,750 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 20:59:27,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2023-08-30 20:59:27,752 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2023-08-30 20:59:27,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2023-08-30 20:59:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:59:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:59:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 914 transitions. [2023-08-30 20:59:27,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215867158671587 [2023-08-30 20:59:27,762 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 914 transitions. [2023-08-30 20:59:27,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 914 transitions. [2023-08-30 20:59:27,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:27,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 914 transitions. [2023-08-30 20:59:27,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.25) internal successors, (914), 8 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:27,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:27,772 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:27,772 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 914 transitions. [2023-08-30 20:59:27,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2023-08-30 20:59:27,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:59:27,775 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2023-08-30 20:59:27,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-30 20:59:27,776 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-30 20:59:27,776 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2023-08-30 20:59:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:27,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:27,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:27,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:59:27,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:27,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 143763307, now seen corresponding path program 2 times [2023-08-30 20:59:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534473103] [2023-08-30 20:59:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:27,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:59:28,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:28,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534473103] [2023-08-30 20:59:28,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534473103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:59:28,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:59:28,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 20:59:28,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442820387] [2023-08-30 20:59:28,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:59:28,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:59:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:59:28,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:59:28,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-30 20:59:28,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:28,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-30 20:59:28,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:28,361 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2023-08-30 20:59:28,361 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-08-30 20:59:28,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 408 event pairs, 9 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2023-08-30 20:59:28,363 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2023-08-30 20:59:28,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2023-08-30 20:59:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:59:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:59:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 901 transitions. [2023-08-30 20:59:28,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41559040590405905 [2023-08-30 20:59:28,367 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 901 transitions. [2023-08-30 20:59:28,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 901 transitions. [2023-08-30 20:59:28,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:28,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 901 transitions. [2023-08-30 20:59:28,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.625) internal successors, (901), 8 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,374 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,375 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 901 transitions. [2023-08-30 20:59:28,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2023-08-30 20:59:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-08-30 20:59:28,378 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2023-08-30 20:59:28,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-30 20:59:28,378 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-08-30 20:59:28,379 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2023-08-30 20:59:28,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:28,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:28,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:59:28,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:28,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:28,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1615625679, now seen corresponding path program 3 times [2023-08-30 20:59:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:28,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959532722] [2023-08-30 20:59:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:59:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959532722] [2023-08-30 20:59:28,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959532722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:59:28,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:59:28,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 20:59:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334757830] [2023-08-30 20:59:28,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:59:28,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:59:28,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:28,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:59:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:59:28,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-08-30 20:59:28,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:28,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-08-30 20:59:28,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:28,531 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2023-08-30 20:59:28,532 INFO L131 PetriNetUnfolder]: For 122/125 co-relation queries the response was YES. [2023-08-30 20:59:28,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 122/125 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 297 event pairs, 10 based on Foata normal form. 9/108 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2023-08-30 20:59:28,534 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-08-30 20:59:28,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2023-08-30 20:59:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:59:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:59:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-30 20:59:28,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46494464944649444 [2023-08-30 20:59:28,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-30 20:59:28,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-30 20:59:28,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:28,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-30 20:59:28,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,545 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 378 transitions. [2023-08-30 20:59:28,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2023-08-30 20:59:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 20:59:28,550 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2023-08-30 20:59:28,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 20:59:28,553 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-30 20:59:28,553 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2023-08-30 20:59:28,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:28,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:28,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:59:28,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:28,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:28,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2042112127, now seen corresponding path program 4 times [2023-08-30 20:59:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:28,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158206100] [2023-08-30 20:59:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:59:28,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158206100] [2023-08-30 20:59:28,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158206100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:59:28,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:59:28,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 20:59:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185118941] [2023-08-30 20:59:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:59:28,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:59:28,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:59:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:59:29,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-30 20:59:29,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:29,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-30 20:59:29,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:29,134 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2023-08-30 20:59:29,134 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-30 20:59:29,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 11 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2023-08-30 20:59:29,135 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-08-30 20:59:29,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2023-08-30 20:59:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:59:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:59:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 896 transitions. [2023-08-30 20:59:29,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132841328413284 [2023-08-30 20:59:29,139 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 896 transitions. [2023-08-30 20:59:29,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 896 transitions. [2023-08-30 20:59:29,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:29,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 896 transitions. [2023-08-30 20:59:29,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.0) internal successors, (896), 8 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,145 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,145 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 896 transitions. [2023-08-30 20:59:29,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2023-08-30 20:59:29,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:59:29,147 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2023-08-30 20:59:29,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 20:59:29,148 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-08-30 20:59:29,148 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2023-08-30 20:59:29,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:29,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:29,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:59:29,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:29,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1023024236, now seen corresponding path program 1 times [2023-08-30 20:59:29,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:29,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154429927] [2023-08-30 20:59:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:29,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:29,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154429927] [2023-08-30 20:59:29,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154429927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089771907] [2023-08-30 20:59:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:29,249 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 20:59:29,280 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 20:59:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:29,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:59:29,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:29,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:29,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089771907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:29,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:29,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 20:59:29,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139367680] [2023-08-30 20:59:29,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:29,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:59:29,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:59:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:59:29,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 271 [2023-08-30 20:59:29,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 12 states, 12 states have (on average 114.08333333333333) internal successors, (1369), 12 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:29,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 271 [2023-08-30 20:59:29,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:29,774 INFO L130 PetriNetUnfolder]: 98/203 cut-off events. [2023-08-30 20:59:29,775 INFO L131 PetriNetUnfolder]: For 311/325 co-relation queries the response was YES. [2023-08-30 20:59:29,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 203 events. 98/203 cut-off events. For 311/325 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 697 event pairs, 36 based on Foata normal form. 14/197 useless extension candidates. Maximal degree in co-relation 757. Up to 112 conditions per place. [2023-08-30 20:59:29,776 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 46 selfloop transitions, 7 changer transitions 4/59 dead transitions. [2023-08-30 20:59:29,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 451 flow [2023-08-30 20:59:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:59:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:59:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 710 transitions. [2023-08-30 20:59:29,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43665436654366546 [2023-08-30 20:59:29,789 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 710 transitions. [2023-08-30 20:59:29,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 710 transitions. [2023-08-30 20:59:29,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:29,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 710 transitions. [2023-08-30 20:59:29,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.33333333333333) internal successors, (710), 6 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,796 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 6 states and 710 transitions. [2023-08-30 20:59:29,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 451 flow [2023-08-30 20:59:29,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 401 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-30 20:59:29,800 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 238 flow [2023-08-30 20:59:29,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-30 20:59:29,802 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-30 20:59:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 238 flow [2023-08-30 20:59:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 114.08333333333333) internal successors, (1369), 12 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:29,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:29,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:59:30,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 20:59:30,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:30,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:30,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1249123538, now seen corresponding path program 1 times [2023-08-30 20:59:30,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:30,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084148219] [2023-08-30 20:59:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:30,092 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 20:59:30,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:30,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084148219] [2023-08-30 20:59:30,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084148219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:59:30,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:59:30,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:59:30,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915276759] [2023-08-30 20:59:30,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:59:30,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:59:30,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:59:30,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:59:30,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-08-30 20:59:30,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:30,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:30,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-08-30 20:59:30,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:30,173 INFO L130 PetriNetUnfolder]: 109/232 cut-off events. [2023-08-30 20:59:30,173 INFO L131 PetriNetUnfolder]: For 320/334 co-relation queries the response was YES. [2023-08-30 20:59:30,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 232 events. 109/232 cut-off events. For 320/334 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 828 event pairs, 15 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 646. Up to 83 conditions per place. [2023-08-30 20:59:30,175 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 34 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-08-30 20:59:30,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 432 flow [2023-08-30 20:59:30,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:59:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:59:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-08-30 20:59:30,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232472324723246 [2023-08-30 20:59:30,177 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-08-30 20:59:30,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-08-30 20:59:30,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:30,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-08-30 20:59:30,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:30,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:30,181 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:30,181 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 238 flow. Second operand 4 states and 512 transitions. [2023-08-30 20:59:30,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 432 flow [2023-08-30 20:59:30,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 407 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 20:59:30,184 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 214 flow [2023-08-30 20:59:30,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-30 20:59:30,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-08-30 20:59:30,185 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 214 flow [2023-08-30 20:59:30,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:30,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:30,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:30,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 20:59:30,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:30,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash 935567924, now seen corresponding path program 2 times [2023-08-30 20:59:30,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:30,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571558702] [2023-08-30 20:59:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:30,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:30,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:30,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571558702] [2023-08-30 20:59:30,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571558702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:30,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155069470] [2023-08-30 20:59:30,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:59:30,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:30,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:30,642 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 20:59:30,659 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 20:59:30,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:59:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:59:30,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:30,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:31,057 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 20:59:31,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-08-30 20:59:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:31,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155069470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:31,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:31,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-08-30 20:59:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524570395] [2023-08-30 20:59:31,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:31,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:59:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:59:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:59:31,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 271 [2023-08-30 20:59:31,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:31,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:31,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 271 [2023-08-30 20:59:31,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:32,096 INFO L130 PetriNetUnfolder]: 261/504 cut-off events. [2023-08-30 20:59:32,096 INFO L131 PetriNetUnfolder]: For 771/785 co-relation queries the response was YES. [2023-08-30 20:59:32,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 504 events. 261/504 cut-off events. For 771/785 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2184 event pairs, 30 based on Foata normal form. 6/389 useless extension candidates. Maximal degree in co-relation 1540. Up to 263 conditions per place. [2023-08-30 20:59:32,100 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 92 selfloop transitions, 49 changer transitions 0/143 dead transitions. [2023-08-30 20:59:32,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 143 transitions, 1152 flow [2023-08-30 20:59:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:59:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:59:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2093 transitions. [2023-08-30 20:59:32,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40648669644591184 [2023-08-30 20:59:32,107 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2093 transitions. [2023-08-30 20:59:32,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2093 transitions. [2023-08-30 20:59:32,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:32,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2093 transitions. [2023-08-30 20:59:32,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.15789473684211) internal successors, (2093), 19 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:32,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:32,121 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:32,121 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 214 flow. Second operand 19 states and 2093 transitions. [2023-08-30 20:59:32,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 143 transitions, 1152 flow [2023-08-30 20:59:32,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 143 transitions, 959 flow, removed 93 selfloop flow, removed 3 redundant places. [2023-08-30 20:59:32,127 INFO L231 Difference]: Finished difference. Result has 63 places, 83 transitions, 708 flow [2023-08-30 20:59:32,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=708, PETRI_PLACES=63, PETRI_TRANSITIONS=83} [2023-08-30 20:59:32,129 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-08-30 20:59:32,130 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 83 transitions, 708 flow [2023-08-30 20:59:32,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 105.95) internal successors, (2119), 20 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:32,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:32,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:32,139 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 20:59:32,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-30 20:59:32,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:32,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:32,338 INFO L85 PathProgramCache]: Analyzing trace with hash -912937574, now seen corresponding path program 3 times [2023-08-30 20:59:32,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:32,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137607283] [2023-08-30 20:59:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:32,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:32,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137607283] [2023-08-30 20:59:32,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137607283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:32,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811612566] [2023-08-30 20:59:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:59:32,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:32,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:32,817 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 20:59:32,840 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 20:59:32,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:59:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 20:59:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:59:33,152 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 20:59:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:33,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:33,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:33,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-30 20:59:33,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-30 20:59:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:33,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811612566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:33,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:33,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-08-30 20:59:33,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970720736] [2023-08-30 20:59:33,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:33,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:59:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:33,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:59:33,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=503, Unknown=2, NotChecked=0, Total=600 [2023-08-30 20:59:34,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-08-30 20:59:34,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 83 transitions, 708 flow. Second operand has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:34,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:34,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-08-30 20:59:34,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:36,139 INFO L130 PetriNetUnfolder]: 506/972 cut-off events. [2023-08-30 20:59:36,140 INFO L131 PetriNetUnfolder]: For 3068/3068 co-relation queries the response was YES. [2023-08-30 20:59:36,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4513 conditions, 972 events. 506/972 cut-off events. For 3068/3068 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4911 event pairs, 50 based on Foata normal form. 34/943 useless extension candidates. Maximal degree in co-relation 3660. Up to 357 conditions per place. [2023-08-30 20:59:36,148 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 150 selfloop transitions, 104 changer transitions 2/256 dead transitions. [2023-08-30 20:59:36,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 256 transitions, 2421 flow [2023-08-30 20:59:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 20:59:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 20:59:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2425 transitions. [2023-08-30 20:59:36,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3195835529783869 [2023-08-30 20:59:36,156 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2425 transitions. [2023-08-30 20:59:36,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2425 transitions. [2023-08-30 20:59:36,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:36,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2425 transitions. [2023-08-30 20:59:36,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 86.60714285714286) internal successors, (2425), 28 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:36,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:36,173 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:36,173 INFO L175 Difference]: Start difference. First operand has 63 places, 83 transitions, 708 flow. Second operand 28 states and 2425 transitions. [2023-08-30 20:59:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 256 transitions, 2421 flow [2023-08-30 20:59:36,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 256 transitions, 2240 flow, removed 81 selfloop flow, removed 3 redundant places. [2023-08-30 20:59:36,193 INFO L231 Difference]: Finished difference. Result has 101 places, 163 transitions, 1768 flow [2023-08-30 20:59:36,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1768, PETRI_PLACES=101, PETRI_TRANSITIONS=163} [2023-08-30 20:59:36,195 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-08-30 20:59:36,195 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 163 transitions, 1768 flow [2023-08-30 20:59:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:36,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:36,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:36,204 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 20:59:36,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:36,402 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:36,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:36,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1416627676, now seen corresponding path program 4 times [2023-08-30 20:59:36,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:36,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872127650] [2023-08-30 20:59:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:36,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:37,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872127650] [2023-08-30 20:59:37,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872127650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:37,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711910057] [2023-08-30 20:59:37,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:59:37,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:37,074 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 20:59:37,077 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 20:59:37,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:59:37,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 20:59:37,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:59:37,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:37,318 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 20:59:37,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-08-30 20:59:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:59:37,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711910057] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:37,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:59:37,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2023-08-30 20:59:37,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751733735] [2023-08-30 20:59:37,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:59:37,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 20:59:37,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:37,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 20:59:37,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:59:37,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-30 20:59:37,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 163 transitions, 1768 flow. Second operand has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:37,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:37,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-30 20:59:37,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:37,635 INFO L130 PetriNetUnfolder]: 503/943 cut-off events. [2023-08-30 20:59:37,635 INFO L131 PetriNetUnfolder]: For 5747/5747 co-relation queries the response was YES. [2023-08-30 20:59:37,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 943 events. 503/943 cut-off events. For 5747/5747 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4608 event pairs, 86 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 5136. Up to 403 conditions per place. [2023-08-30 20:59:37,644 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 119 selfloop transitions, 64 changer transitions 1/184 dead transitions. [2023-08-30 20:59:37,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 2292 flow [2023-08-30 20:59:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:59:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:59:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 683 transitions. [2023-08-30 20:59:37,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200492004920049 [2023-08-30 20:59:37,647 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 683 transitions. [2023-08-30 20:59:37,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 683 transitions. [2023-08-30 20:59:37,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:37,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 683 transitions. [2023-08-30 20:59:37,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:37,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:37,652 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:37,652 INFO L175 Difference]: Start difference. First operand has 101 places, 163 transitions, 1768 flow. Second operand 6 states and 683 transitions. [2023-08-30 20:59:37,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 2292 flow [2023-08-30 20:59:37,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 184 transitions, 2052 flow, removed 113 selfloop flow, removed 6 redundant places. [2023-08-30 20:59:37,709 INFO L231 Difference]: Finished difference. Result has 98 places, 164 transitions, 1728 flow [2023-08-30 20:59:37,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1728, PETRI_PLACES=98, PETRI_TRANSITIONS=164} [2023-08-30 20:59:37,710 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-08-30 20:59:37,710 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 164 transitions, 1728 flow [2023-08-30 20:59:37,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:37,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:37,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:37,723 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 20:59:37,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:37,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:37,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1886042083, now seen corresponding path program 1 times [2023-08-30 20:59:37,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:37,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957265267] [2023-08-30 20:59:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:38,697 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 20:59:38,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:38,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957265267] [2023-08-30 20:59:38,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957265267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934649570] [2023-08-30 20:59:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:38,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:38,699 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 20:59:38,711 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 20:59:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:38,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 20:59:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:39,171 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 20:59:39,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:39,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:39,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-30 20:59:39,764 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 20:59:39,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934649570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:39,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:39,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-08-30 20:59:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085471113] [2023-08-30 20:59:39,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:59:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:59:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:59:41,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-30 20:59:41,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 164 transitions, 1728 flow. Second operand has 29 states, 29 states have (on average 91.82758620689656) internal successors, (2663), 29 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:41,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:41,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-30 20:59:41,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:44,013 INFO L130 PetriNetUnfolder]: 539/1015 cut-off events. [2023-08-30 20:59:44,013 INFO L131 PetriNetUnfolder]: For 6979/6979 co-relation queries the response was YES. [2023-08-30 20:59:44,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5600 conditions, 1015 events. 539/1015 cut-off events. For 6979/6979 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5132 event pairs, 75 based on Foata normal form. 2/1017 useless extension candidates. Maximal degree in co-relation 5564. Up to 497 conditions per place. [2023-08-30 20:59:44,022 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 136 selfloop transitions, 83 changer transitions 7/226 dead transitions. [2023-08-30 20:59:44,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 226 transitions, 2636 flow [2023-08-30 20:59:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:59:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:59:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1892 transitions. [2023-08-30 20:59:44,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34907749077490774 [2023-08-30 20:59:44,028 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1892 transitions. [2023-08-30 20:59:44,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1892 transitions. [2023-08-30 20:59:44,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:44,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1892 transitions. [2023-08-30 20:59:44,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.6) internal successors, (1892), 20 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:44,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:44,051 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:44,052 INFO L175 Difference]: Start difference. First operand has 98 places, 164 transitions, 1728 flow. Second operand 20 states and 1892 transitions. [2023-08-30 20:59:44,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 226 transitions, 2636 flow [2023-08-30 20:59:44,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 226 transitions, 2604 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-30 20:59:44,089 INFO L231 Difference]: Finished difference. Result has 123 places, 180 transitions, 2111 flow [2023-08-30 20:59:44,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2111, PETRI_PLACES=123, PETRI_TRANSITIONS=180} [2023-08-30 20:59:44,090 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-08-30 20:59:44,090 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 180 transitions, 2111 flow [2023-08-30 20:59:44,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.82758620689656) internal successors, (2663), 29 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:44,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:44,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:44,099 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 20:59:44,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 20:59:44,297 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:44,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2035982271, now seen corresponding path program 2 times [2023-08-30 20:59:44,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:44,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190917618] [2023-08-30 20:59:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:45,149 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 20:59:45,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:45,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190917618] [2023-08-30 20:59:45,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190917618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:45,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523659733] [2023-08-30 20:59:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:59:45,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:45,151 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 20:59:45,171 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 20:59:45,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:59:45,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 20:59:45,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:45,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-30 20:59:45,745 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 20:59:45,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:46,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:46,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-30 20:59:46,281 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 20:59:46,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523659733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:46,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:46,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-08-30 20:59:46,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291931488] [2023-08-30 20:59:46,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:46,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:59:46,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:59:46,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-08-30 20:59:47,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-30 20:59:47,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 180 transitions, 2111 flow. Second operand has 28 states, 28 states have (on average 91.89285714285714) internal successors, (2573), 28 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:47,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:47,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-30 20:59:47,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:48,611 INFO L130 PetriNetUnfolder]: 598/1158 cut-off events. [2023-08-30 20:59:48,612 INFO L131 PetriNetUnfolder]: For 9311/9311 co-relation queries the response was YES. [2023-08-30 20:59:48,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 1158 events. 598/1158 cut-off events. For 9311/9311 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6291 event pairs, 52 based on Foata normal form. 2/1160 useless extension candidates. Maximal degree in co-relation 6820. Up to 856 conditions per place. [2023-08-30 20:59:48,625 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 174 selfloop transitions, 76 changer transitions 6/256 dead transitions. [2023-08-30 20:59:48,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 256 transitions, 3098 flow [2023-08-30 20:59:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:59:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:59:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2001 transitions. [2023-08-30 20:59:48,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35160780179230366 [2023-08-30 20:59:48,629 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2001 transitions. [2023-08-30 20:59:48,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2001 transitions. [2023-08-30 20:59:48,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:48,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2001 transitions. [2023-08-30 20:59:48,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.28571428571429) internal successors, (2001), 21 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:48,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:48,638 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:48,638 INFO L175 Difference]: Start difference. First operand has 123 places, 180 transitions, 2111 flow. Second operand 21 states and 2001 transitions. [2023-08-30 20:59:48,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 256 transitions, 3098 flow [2023-08-30 20:59:48,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 256 transitions, 3019 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-30 20:59:48,686 INFO L231 Difference]: Finished difference. Result has 142 places, 202 transitions, 2525 flow [2023-08-30 20:59:48,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2525, PETRI_PLACES=142, PETRI_TRANSITIONS=202} [2023-08-30 20:59:48,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-08-30 20:59:48,706 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 202 transitions, 2525 flow [2023-08-30 20:59:48,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.89285714285714) internal successors, (2573), 28 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:48,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:48,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:48,715 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 20:59:48,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:48,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:48,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1472029166, now seen corresponding path program 5 times [2023-08-30 20:59:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:48,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840781276] [2023-08-30 20:59:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:49,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:49,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840781276] [2023-08-30 20:59:49,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840781276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:49,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961279386] [2023-08-30 20:59:49,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:59:49,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:49,665 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 20:59:49,691 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 20:59:49,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:59:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 20:59:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:49,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:59:49,921 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 20:59:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:59:49,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:49,975 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_332 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_332) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-08-30 20:59:49,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:49,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-30 20:59:49,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-30 20:59:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 20:59:50,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961279386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:50,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:50,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-08-30 20:59:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703705012] [2023-08-30 20:59:50,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:59:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:50,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:59:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=360, Unknown=1, NotChecked=38, Total=462 [2023-08-30 20:59:50,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-08-30 20:59:50,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 202 transitions, 2525 flow. Second operand has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:50,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:50,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-08-30 20:59:50,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:51,337 INFO L130 PetriNetUnfolder]: 717/1365 cut-off events. [2023-08-30 20:59:51,337 INFO L131 PetriNetUnfolder]: For 14585/14585 co-relation queries the response was YES. [2023-08-30 20:59:51,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8683 conditions, 1365 events. 717/1365 cut-off events. For 14585/14585 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7598 event pairs, 56 based on Foata normal form. 16/1381 useless extension candidates. Maximal degree in co-relation 8632. Up to 417 conditions per place. [2023-08-30 20:59:51,352 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 155 selfloop transitions, 136 changer transitions 2/293 dead transitions. [2023-08-30 20:59:51,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 293 transitions, 4017 flow [2023-08-30 20:59:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:59:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:59:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1633 transitions. [2023-08-30 20:59:51,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31714896096329387 [2023-08-30 20:59:51,356 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1633 transitions. [2023-08-30 20:59:51,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1633 transitions. [2023-08-30 20:59:51,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:51,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1633 transitions. [2023-08-30 20:59:51,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.94736842105263) internal successors, (1633), 19 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:51,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:51,363 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:51,363 INFO L175 Difference]: Start difference. First operand has 142 places, 202 transitions, 2525 flow. Second operand 19 states and 1633 transitions. [2023-08-30 20:59:51,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 293 transitions, 4017 flow [2023-08-30 20:59:51,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 293 transitions, 3858 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-08-30 20:59:51,425 INFO L231 Difference]: Finished difference. Result has 154 places, 234 transitions, 3280 flow [2023-08-30 20:59:51,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3280, PETRI_PLACES=154, PETRI_TRANSITIONS=234} [2023-08-30 20:59:51,426 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2023-08-30 20:59:51,426 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 234 transitions, 3280 flow [2023-08-30 20:59:51,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:51,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:51,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:51,436 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 20:59:51,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:51,637 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:51,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash 154671513, now seen corresponding path program 3 times [2023-08-30 20:59:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:51,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716722597] [2023-08-30 20:59:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:51,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:52,359 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 20:59:52,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:52,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716722597] [2023-08-30 20:59:52,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716722597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:52,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289974416] [2023-08-30 20:59:52,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:59:52,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:52,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:52,361 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 20:59:52,383 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 20:59:52,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:59:52,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:59:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:53,204 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 20:59:53,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:53,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:53,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-30 20:59:53,599 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 20:59:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289974416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:53,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:53,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-30 20:59:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448376766] [2023-08-30 20:59:53,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:53,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:59:53,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:59:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-08-30 20:59:54,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-30 20:59:54,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 234 transitions, 3280 flow. Second operand has 27 states, 27 states have (on average 91.96296296296296) internal successors, (2483), 27 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:54,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:54,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-30 20:59:54,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:55,539 INFO L130 PetriNetUnfolder]: 724/1390 cut-off events. [2023-08-30 20:59:55,539 INFO L131 PetriNetUnfolder]: For 16455/16455 co-relation queries the response was YES. [2023-08-30 20:59:55,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9474 conditions, 1390 events. 724/1390 cut-off events. For 16455/16455 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7851 event pairs, 169 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 9418. Up to 1206 conditions per place. [2023-08-30 20:59:55,551 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 201 selfloop transitions, 56 changer transitions 14/271 dead transitions. [2023-08-30 20:59:55,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 271 transitions, 4013 flow [2023-08-30 20:59:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:59:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:59:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1702 transitions. [2023-08-30 20:59:55,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34891348913489134 [2023-08-30 20:59:55,553 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1702 transitions. [2023-08-30 20:59:55,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1702 transitions. [2023-08-30 20:59:55,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:55,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1702 transitions. [2023-08-30 20:59:55,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.55555555555556) internal successors, (1702), 18 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:55,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:55,560 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:55,560 INFO L175 Difference]: Start difference. First operand has 154 places, 234 transitions, 3280 flow. Second operand 18 states and 1702 transitions. [2023-08-30 20:59:55,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 271 transitions, 4013 flow [2023-08-30 20:59:55,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 271 transitions, 3910 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-30 20:59:55,634 INFO L231 Difference]: Finished difference. Result has 165 places, 236 transitions, 3332 flow [2023-08-30 20:59:55,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3332, PETRI_PLACES=165, PETRI_TRANSITIONS=236} [2023-08-30 20:59:55,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2023-08-30 20:59:55,635 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 236 transitions, 3332 flow [2023-08-30 20:59:55,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 91.96296296296296) internal successors, (2483), 27 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:55,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:55,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:55,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 20:59:55,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:59:55,844 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:55,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1820848081, now seen corresponding path program 4 times [2023-08-30 20:59:55,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:55,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665090594] [2023-08-30 20:59:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:56,785 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 20:59:56,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665090594] [2023-08-30 20:59:56,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665090594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260554865] [2023-08-30 20:59:56,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:59:56,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:56,787 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 20:59:56,789 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 20:59:56,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:59:56,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 20:59:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:57,340 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 20:59:57,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:57,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:59:57,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-30 20:59:58,015 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 20:59:58,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260554865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:58,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:58,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-30 20:59:58,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280073197] [2023-08-30 20:59:58,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:58,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 20:59:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 20:59:58,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 21:00:00,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 271 [2023-08-30 21:00:00,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 236 transitions, 3332 flow. Second operand has 33 states, 33 states have (on average 85.63636363636364) internal successors, (2826), 33 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:00,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:00,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 271 [2023-08-30 21:00:00,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:02,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:03,937 INFO L130 PetriNetUnfolder]: 853/1644 cut-off events. [2023-08-30 21:00:03,937 INFO L131 PetriNetUnfolder]: For 22584/22584 co-relation queries the response was YES. [2023-08-30 21:00:03,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1644 events. 853/1644 cut-off events. For 22584/22584 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9730 event pairs, 114 based on Foata normal form. 7/1651 useless extension candidates. Maximal degree in co-relation 11779. Up to 1253 conditions per place. [2023-08-30 21:00:03,953 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 242 selfloop transitions, 95 changer transitions 15/352 dead transitions. [2023-08-30 21:00:03,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 352 transitions, 5208 flow [2023-08-30 21:00:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:00:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:00:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2312 transitions. [2023-08-30 21:00:03,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32812943514050524 [2023-08-30 21:00:03,958 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2312 transitions. [2023-08-30 21:00:03,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2312 transitions. [2023-08-30 21:00:03,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:03,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2312 transitions. [2023-08-30 21:00:03,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.92307692307692) internal successors, (2312), 26 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:03,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:03,988 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:03,988 INFO L175 Difference]: Start difference. First operand has 165 places, 236 transitions, 3332 flow. Second operand 26 states and 2312 transitions. [2023-08-30 21:00:03,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 352 transitions, 5208 flow [2023-08-30 21:00:04,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 352 transitions, 5066 flow, removed 6 selfloop flow, removed 15 redundant places. [2023-08-30 21:00:04,096 INFO L231 Difference]: Finished difference. Result has 185 places, 286 transitions, 4391 flow [2023-08-30 21:00:04,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4391, PETRI_PLACES=185, PETRI_TRANSITIONS=286} [2023-08-30 21:00:04,097 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-08-30 21:00:04,097 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 286 transitions, 4391 flow [2023-08-30 21:00:04,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.63636363636364) internal successors, (2826), 33 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:04,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:04,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:00:04,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:00:04,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:00:04,305 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:00:04,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2088997291, now seen corresponding path program 5 times [2023-08-30 21:00:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:04,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465603936] [2023-08-30 21:00:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:04,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:05,082 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 21:00:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:00:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465603936] [2023-08-30 21:00:05,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465603936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:00:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407962240] [2023-08-30 21:00:05,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:00:05,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:00:05,089 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:00:05,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:00:05,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:00:05,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:00:05,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 21:00:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:00:05,511 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 21:00:05,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:00:05,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:05,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2023-08-30 21:00:06,021 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 21:00:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407962240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:00:06,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:00:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-30 21:00:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537818268] [2023-08-30 21:00:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:00:06,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:00:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:00:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:00:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:00:07,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-08-30 21:00:07,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 286 transitions, 4391 flow. Second operand has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:07,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:07,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-08-30 21:00:07,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:09,154 INFO L130 PetriNetUnfolder]: 842/1620 cut-off events. [2023-08-30 21:00:09,155 INFO L131 PetriNetUnfolder]: For 21513/21513 co-relation queries the response was YES. [2023-08-30 21:00:09,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 1620 events. 842/1620 cut-off events. For 21513/21513 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9571 event pairs, 122 based on Foata normal form. 2/1622 useless extension candidates. Maximal degree in co-relation 11986. Up to 927 conditions per place. [2023-08-30 21:00:09,171 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 215 selfloop transitions, 100 changer transitions 15/330 dead transitions. [2023-08-30 21:00:09,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 330 transitions, 5409 flow [2023-08-30 21:00:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:00:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:00:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1858 transitions. [2023-08-30 21:00:09,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34280442804428046 [2023-08-30 21:00:09,174 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1858 transitions. [2023-08-30 21:00:09,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1858 transitions. [2023-08-30 21:00:09,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:09,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1858 transitions. [2023-08-30 21:00:09,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 92.9) internal successors, (1858), 20 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:09,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:09,181 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:09,181 INFO L175 Difference]: Start difference. First operand has 185 places, 286 transitions, 4391 flow. Second operand 20 states and 1858 transitions. [2023-08-30 21:00:09,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 330 transitions, 5409 flow [2023-08-30 21:00:09,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 330 transitions, 5217 flow, removed 73 selfloop flow, removed 11 redundant places. [2023-08-30 21:00:09,264 INFO L231 Difference]: Finished difference. Result has 195 places, 288 transitions, 4446 flow [2023-08-30 21:00:09,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4446, PETRI_PLACES=195, PETRI_TRANSITIONS=288} [2023-08-30 21:00:09,265 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-08-30 21:00:09,265 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 288 transitions, 4446 flow [2023-08-30 21:00:09,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:09,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:09,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:00:09,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 21:00:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 21:00:09,466 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:00:09,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash -348873531, now seen corresponding path program 6 times [2023-08-30 21:00:09,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:09,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559918673] [2023-08-30 21:00:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:09,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:10,603 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 21:00:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:00:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559918673] [2023-08-30 21:00:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559918673] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:00:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747349787] [2023-08-30 21:00:10,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:00:10,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:00:10,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:00:10,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:00:11,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:00:11,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:00:11,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 21:00:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:00:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:00:11,279 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 21:00:11,514 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 21:00:11,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:00:11,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:11,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-08-30 21:00:11,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-08-30 21:00:11,989 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 21:00:11,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747349787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:00:11,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:00:11,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 30 [2023-08-30 21:00:11,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809473149] [2023-08-30 21:00:11,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:00:11,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 21:00:11,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:00:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 21:00:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=902, Unknown=2, NotChecked=0, Total=992 [2023-08-30 21:00:14,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:16,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:18,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:20,261 WARN L539 Checker$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 21:00:23,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:25,200 WARN L539 Checker$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 21:00:25,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-30 21:00:25,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 288 transitions, 4446 flow. Second operand has 32 states, 32 states have (on average 69.65625) internal successors, (2229), 32 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:25,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:25,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-30 21:00:25,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:27,572 INFO L130 PetriNetUnfolder]: 855/1645 cut-off events. [2023-08-30 21:00:27,572 INFO L131 PetriNetUnfolder]: For 26143/26143 co-relation queries the response was YES. [2023-08-30 21:00:27,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12289 conditions, 1645 events. 855/1645 cut-off events. For 26143/26143 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9772 event pairs, 102 based on Foata normal form. 2/1647 useless extension candidates. Maximal degree in co-relation 12215. Up to 887 conditions per place. [2023-08-30 21:00:27,586 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 202 selfloop transitions, 139 changer transitions 7/348 dead transitions. [2023-08-30 21:00:27,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 348 transitions, 5735 flow [2023-08-30 21:00:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:00:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:00:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1452 transitions. [2023-08-30 21:00:27,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26789667896678965 [2023-08-30 21:00:27,589 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1452 transitions. [2023-08-30 21:00:27,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1452 transitions. [2023-08-30 21:00:27,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:27,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1452 transitions. [2023-08-30 21:00:27,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.6) internal successors, (1452), 20 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:27,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:27,596 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:27,596 INFO L175 Difference]: Start difference. First operand has 195 places, 288 transitions, 4446 flow. Second operand 20 states and 1452 transitions. [2023-08-30 21:00:27,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 348 transitions, 5735 flow [2023-08-30 21:00:27,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 348 transitions, 5673 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-08-30 21:00:27,689 INFO L231 Difference]: Finished difference. Result has 205 places, 302 transitions, 4984 flow [2023-08-30 21:00:27,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4984, PETRI_PLACES=205, PETRI_TRANSITIONS=302} [2023-08-30 21:00:27,690 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-08-30 21:00:27,690 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 302 transitions, 4984 flow [2023-08-30 21:00:27,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 69.65625) internal successors, (2229), 32 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:27,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:27,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:00:27,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:00:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 21:00:27,896 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:00:27,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2032706171, now seen corresponding path program 7 times [2023-08-30 21:00:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:27,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231021203] [2023-08-30 21:00:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:28,679 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 21:00:28,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:00:28,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231021203] [2023-08-30 21:00:28,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231021203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:00:28,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434822748] [2023-08-30 21:00:28,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:00:28,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:28,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:00:28,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:00:28,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:00:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 21:00:28,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:00:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:00:29,044 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 21:00:29,190 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:00:29,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:29,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 21:00:29,292 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 21:00:29,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:00:29,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:00:29,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-08-30 21:00:29,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-08-30 21:00:29,993 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 21:00:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434822748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:00:29,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:00:29,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 21:00:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770560870] [2023-08-30 21:00:29,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:00:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:00:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:00:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:00:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=920, Unknown=6, NotChecked=0, Total=1056 [2023-08-30 21:00:32,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:35,130 WARN L539 Checker$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 21:00:35,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-08-30 21:00:35,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 302 transitions, 4984 flow. Second operand has 33 states, 33 states have (on average 72.57575757575758) internal successors, (2395), 33 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:35,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:35,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-08-30 21:00:35,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:51,417 WARN L222 SmtUtils]: Spent 12.23s on a formula simplification. DAG size of input: 41 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:00:53,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:00:55,931 WARN L539 Checker$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 21:00:59,156 INFO L130 PetriNetUnfolder]: 1005/1978 cut-off events. [2023-08-30 21:00:59,156 INFO L131 PetriNetUnfolder]: For 38067/38067 co-relation queries the response was YES. [2023-08-30 21:00:59,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15509 conditions, 1978 events. 1005/1978 cut-off events. For 38067/38067 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12749 event pairs, 57 based on Foata normal form. 4/1982 useless extension candidates. Maximal degree in co-relation 15430. Up to 622 conditions per place. [2023-08-30 21:00:59,175 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 212 selfloop transitions, 220 changer transitions 16/448 dead transitions. [2023-08-30 21:00:59,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 448 transitions, 7306 flow [2023-08-30 21:00:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 21:00:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 21:00:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2373 transitions. [2023-08-30 21:00:59,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824663730508273 [2023-08-30 21:00:59,179 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2373 transitions. [2023-08-30 21:00:59,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2373 transitions. [2023-08-30 21:00:59,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:59,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2373 transitions. [2023-08-30 21:00:59,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 76.54838709677419) internal successors, (2373), 31 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:59,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:59,189 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:59,189 INFO L175 Difference]: Start difference. First operand has 205 places, 302 transitions, 4984 flow. Second operand 31 states and 2373 transitions. [2023-08-30 21:00:59,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 448 transitions, 7306 flow [2023-08-30 21:00:59,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 448 transitions, 7049 flow, removed 56 selfloop flow, removed 11 redundant places. [2023-08-30 21:00:59,472 INFO L231 Difference]: Finished difference. Result has 236 places, 344 transitions, 6059 flow [2023-08-30 21:00:59,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6059, PETRI_PLACES=236, PETRI_TRANSITIONS=344} [2023-08-30 21:00:59,472 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2023-08-30 21:00:59,472 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 344 transitions, 6059 flow [2023-08-30 21:00:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.57575757575758) internal successors, (2395), 33 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:59,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:59,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:00:59,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:00:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:00:59,674 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:00:59,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash 151395413, now seen corresponding path program 8 times [2023-08-30 21:00:59,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:59,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735529536] [2023-08-30 21:00:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:59,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:00,463 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 21:01:00,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:00,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735529536] [2023-08-30 21:01:00,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735529536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:00,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512913938] [2023-08-30 21:01:00,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:01:00,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:00,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:00,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:01:00,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:01:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 70 conjunts are in the unsatisfiable core [2023-08-30 21:01:00,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:00,664 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 21:01:00,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:01:00,777 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 21:01:00,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:01:00,918 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 21:01:01,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-08-30 21:01:01,244 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 21:01:01,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:02,211 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-08-30 21:01:02,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 221 [2023-08-30 21:01:02,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 324 [2023-08-30 21:01:02,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:02,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 254 [2023-08-30 21:01:02,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:02,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 217 [2023-08-30 21:01:02,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 196 [2023-08-30 21:01:02,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 184 [2023-08-30 21:01:02,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:02,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 181 [2023-08-30 21:01:02,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:02,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 194 [2023-08-30 21:01:02,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:02,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 187 [2023-08-30 21:01:02,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 163 [2023-08-30 21:01:03,441 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 21:01:03,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512913938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:03,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:03,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-30 21:01:03,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229993864] [2023-08-30 21:01:03,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:03,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 21:01:03,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:03,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 21:01:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=977, Unknown=7, NotChecked=0, Total=1122 [2023-08-30 21:01:05,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-30 21:01:05,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 344 transitions, 6059 flow. Second operand has 34 states, 34 states have (on average 69.47058823529412) internal successors, (2362), 34 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:05,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:05,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-30 21:01:05,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:09,852 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~C~0 c_~y~0))) (and (<= c_~N~0 c_~s~0) (<= .cse0 c_~x~0) (<= c_~x~0 .cse0) (<= c_~s~0 c_~N~0) (= c_~q~0.offset 0) (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) (and (forall ((v_ArrVal_544 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_544) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) c_~N~0)) (forall ((~C~0 Int)) (let ((.cse1 (* 2 ~C~0))) (= (+ (* (div (+ c_~y~0 .cse1) 4294967296) 4294967296) c_~x~0) (+ c_~y~0 (* (div (+ c_~x~0 .cse1) 4294967296) 4294967296)))))) (< c_~n~0 (+ 2 c_~q_back~0)) (< c_~q_back~0 0)))) is different from false [2023-08-30 21:01:12,449 INFO L130 PetriNetUnfolder]: 1085/2137 cut-off events. [2023-08-30 21:01:12,449 INFO L131 PetriNetUnfolder]: For 51957/51957 co-relation queries the response was YES. [2023-08-30 21:01:12,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18312 conditions, 2137 events. 1085/2137 cut-off events. For 51957/51957 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14002 event pairs, 79 based on Foata normal form. 29/2166 useless extension candidates. Maximal degree in co-relation 18221. Up to 893 conditions per place. [2023-08-30 21:01:12,471 INFO L137 encePairwiseOnDemand]: 256/271 looper letters, 209 selfloop transitions, 258 changer transitions 36/503 dead transitions. [2023-08-30 21:01:12,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 503 transitions, 8846 flow [2023-08-30 21:01:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 21:01:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 21:01:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3068 transitions. [2023-08-30 21:01:12,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.269548409769812 [2023-08-30 21:01:12,476 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3068 transitions. [2023-08-30 21:01:12,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3068 transitions. [2023-08-30 21:01:12,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:12,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3068 transitions. [2023-08-30 21:01:12,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 73.04761904761905) internal successors, (3068), 42 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states 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 21:01:12,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 271.0) internal successors, (11653), 43 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states 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 21:01:12,488 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 271.0) internal successors, (11653), 43 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states 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 21:01:12,488 INFO L175 Difference]: Start difference. First operand has 236 places, 344 transitions, 6059 flow. Second operand 42 states and 3068 transitions. [2023-08-30 21:01:12,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 503 transitions, 8846 flow [2023-08-30 21:01:12,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 503 transitions, 8514 flow, removed 122 selfloop flow, removed 18 redundant places. [2023-08-30 21:01:12,725 INFO L231 Difference]: Finished difference. Result has 271 places, 392 transitions, 7634 flow [2023-08-30 21:01:12,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=7634, PETRI_PLACES=271, PETRI_TRANSITIONS=392} [2023-08-30 21:01:12,726 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2023-08-30 21:01:12,726 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 392 transitions, 7634 flow [2023-08-30 21:01:12,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.47058823529412) internal successors, (2362), 34 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:12,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:12,727 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:12,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 21:01:12,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:12,927 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:12,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1739213093, now seen corresponding path program 9 times [2023-08-30 21:01:12,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:12,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007578573] [2023-08-30 21:01:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:13,834 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 21:01:13,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:13,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007578573] [2023-08-30 21:01:13,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007578573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:13,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627737970] [2023-08-30 21:01:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:01:13,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:13,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:13,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:01:14,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:01:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:14,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-30 21:01:14,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:01:14,607 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 21:01:14,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-08-30 21:01:14,931 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 21:01:14,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:15,234 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 1))) (or (< .cse0 0) (<= c_~n~0 .cse0) (< c_~q_back~0 0) (and (forall ((v_ArrVal_579 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_579) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)))) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) (mod (+ c_~C~0 c_~x~0) 4294967296))) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2023-08-30 21:01:15,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:15,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-08-30 21:01:15,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-08-30 21:01:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 21:01:15,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627737970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:15,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:15,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 21:01:15,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618768745] [2023-08-30 21:01:15,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:15,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 21:01:15,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:15,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 21:01:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=940, Unknown=2, NotChecked=64, Total=1190 [2023-08-30 21:01:15,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-08-30 21:01:15,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 392 transitions, 7634 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:15,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:15,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-08-30 21:01:15,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:19,524 INFO L130 PetriNetUnfolder]: 1241/2456 cut-off events. [2023-08-30 21:01:19,524 INFO L131 PetriNetUnfolder]: For 66905/66905 co-relation queries the response was YES. [2023-08-30 21:01:19,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23375 conditions, 2456 events. 1241/2456 cut-off events. For 66905/66905 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16683 event pairs, 169 based on Foata normal form. 7/2463 useless extension candidates. Maximal degree in co-relation 23270. Up to 1672 conditions per place. [2023-08-30 21:01:19,549 INFO L137 encePairwiseOnDemand]: 258/271 looper letters, 338 selfloop transitions, 181 changer transitions 42/561 dead transitions. [2023-08-30 21:01:19,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 561 transitions, 11365 flow [2023-08-30 21:01:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 21:01:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 21:01:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2290 transitions. [2023-08-30 21:01:19,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2816728167281673 [2023-08-30 21:01:19,553 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2290 transitions. [2023-08-30 21:01:19,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2290 transitions. [2023-08-30 21:01:19,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:19,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2290 transitions. [2023-08-30 21:01:19,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 76.33333333333333) internal successors, (2290), 30 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states 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 21:01:19,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states 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 21:01:19,562 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states 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 21:01:19,562 INFO L175 Difference]: Start difference. First operand has 271 places, 392 transitions, 7634 flow. Second operand 30 states and 2290 transitions. [2023-08-30 21:01:19,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 561 transitions, 11365 flow [2023-08-30 21:01:19,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 561 transitions, 10342 flow, removed 467 selfloop flow, removed 20 redundant places. [2023-08-30 21:01:19,960 INFO L231 Difference]: Finished difference. Result has 288 places, 475 transitions, 9383 flow [2023-08-30 21:01:19,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6961, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9383, PETRI_PLACES=288, PETRI_TRANSITIONS=475} [2023-08-30 21:01:19,961 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-08-30 21:01:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 475 transitions, 9383 flow [2023-08-30 21:01:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:19,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:19,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:19,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:20,164 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:20,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash -890919087, now seen corresponding path program 10 times [2023-08-30 21:01:20,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:20,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729694267] [2023-08-30 21:01:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:20,846 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 21:01:20,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:20,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729694267] [2023-08-30 21:01:20,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729694267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:20,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143638883] [2023-08-30 21:01:20,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:01:20,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:20,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:20,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:01:20,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:01:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-30 21:01:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:21,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 21:01:21,038 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 21:01:21,094 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 21:01:21,150 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 21:01:21,526 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 21:01:21,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:22,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:22,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 61 [2023-08-30 21:01:22,451 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:01:22,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 271 [2023-08-30 21:01:22,463 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:01:22,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-08-30 21:01:22,475 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:01:22,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2023-08-30 21:01:22,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:22,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2023-08-30 21:01:22,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 138 [2023-08-30 21:01:22,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-30 21:01:22,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-30 21:01:22,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-30 21:01:22,528 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-08-30 21:01:22,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 1 [2023-08-30 21:01:22,595 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 21:01:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143638883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:22,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:22,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-30 21:01:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723221960] [2023-08-30 21:01:22,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:22,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 21:01:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 21:01:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=956, Unknown=7, NotChecked=0, Total=1122 [2023-08-30 21:01:23,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-30 21:01:23,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 475 transitions, 9383 flow. Second operand has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:23,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:23,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-30 21:01:23,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:30,593 INFO L130 PetriNetUnfolder]: 1280/2516 cut-off events. [2023-08-30 21:01:30,594 INFO L131 PetriNetUnfolder]: For 48839/48839 co-relation queries the response was YES. [2023-08-30 21:01:30,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23560 conditions, 2516 events. 1280/2516 cut-off events. For 48839/48839 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17078 event pairs, 73 based on Foata normal form. 2/2516 useless extension candidates. Maximal degree in co-relation 23449. Up to 1643 conditions per place. [2023-08-30 21:01:30,627 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 321 selfloop transitions, 261 changer transitions 11/593 dead transitions. [2023-08-30 21:01:30,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 593 transitions, 12432 flow [2023-08-30 21:01:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:01:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:01:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2321 transitions. [2023-08-30 21:01:30,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2676429889298893 [2023-08-30 21:01:30,631 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2321 transitions. [2023-08-30 21:01:30,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2321 transitions. [2023-08-30 21:01:30,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:30,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2321 transitions. [2023-08-30 21:01:30,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 72.53125) internal successors, (2321), 32 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:30,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:30,640 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:30,641 INFO L175 Difference]: Start difference. First operand has 288 places, 475 transitions, 9383 flow. Second operand 32 states and 2321 transitions. [2023-08-30 21:01:30,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 593 transitions, 12432 flow [2023-08-30 21:01:30,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 593 transitions, 12067 flow, removed 98 selfloop flow, removed 23 redundant places. [2023-08-30 21:01:30,962 INFO L231 Difference]: Finished difference. Result has 294 places, 530 transitions, 11211 flow [2023-08-30 21:01:30,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11211, PETRI_PLACES=294, PETRI_TRANSITIONS=530} [2023-08-30 21:01:30,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-08-30 21:01:30,963 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 530 transitions, 11211 flow [2023-08-30 21:01:30,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:30,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:30,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:30,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:31,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:31,170 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:31,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash -451798573, now seen corresponding path program 11 times [2023-08-30 21:01:31,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:31,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833067564] [2023-08-30 21:01:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:31,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:31,804 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 21:01:31,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833067564] [2023-08-30 21:01:31,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833067564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616988020] [2023-08-30 21:01:31,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:01:31,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:31,809 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:31,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 21:01:32,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:01:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 21:01:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:32,504 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 21:01:32,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:32,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:32,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2023-08-30 21:01:33,116 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 21:01:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616988020] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:33,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:33,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-30 21:01:33,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998989700] [2023-08-30 21:01:33,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:33,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:01:33,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:01:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:01:34,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-30 21:01:34,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 530 transitions, 11211 flow. Second operand has 28 states, 28 states have (on average 91.85714285714286) internal successors, (2572), 28 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:34,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:34,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-30 21:01:34,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:35,786 INFO L130 PetriNetUnfolder]: 1278/2506 cut-off events. [2023-08-30 21:01:35,786 INFO L131 PetriNetUnfolder]: For 53991/53991 co-relation queries the response was YES. [2023-08-30 21:01:35,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23989 conditions, 2506 events. 1278/2506 cut-off events. For 53991/53991 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16875 event pairs, 134 based on Foata normal form. 2/2506 useless extension candidates. Maximal degree in co-relation 23880. Up to 1173 conditions per place. [2023-08-30 21:01:35,811 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 393 selfloop transitions, 173 changer transitions 14/580 dead transitions. [2023-08-30 21:01:35,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 580 transitions, 12879 flow [2023-08-30 21:01:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:01:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:01:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2164 transitions. [2023-08-30 21:01:35,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34718434140863147 [2023-08-30 21:01:35,814 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2164 transitions. [2023-08-30 21:01:35,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2164 transitions. [2023-08-30 21:01:35,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:35,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2164 transitions. [2023-08-30 21:01:35,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 94.08695652173913) internal successors, (2164), 23 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:35,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:35,821 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:35,821 INFO L175 Difference]: Start difference. First operand has 294 places, 530 transitions, 11211 flow. Second operand 23 states and 2164 transitions. [2023-08-30 21:01:35,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 580 transitions, 12879 flow [2023-08-30 21:01:36,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 580 transitions, 12643 flow, removed 85 selfloop flow, removed 18 redundant places. [2023-08-30 21:01:36,192 INFO L231 Difference]: Finished difference. Result has 298 places, 530 transitions, 11425 flow [2023-08-30 21:01:36,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10979, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11425, PETRI_PLACES=298, PETRI_TRANSITIONS=530} [2023-08-30 21:01:36,193 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2023-08-30 21:01:36,193 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 530 transitions, 11425 flow [2023-08-30 21:01:36,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.85714285714286) internal successors, (2572), 28 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:36,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:36,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:36,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 21:01:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 21:01:36,399 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:36,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1660800894, now seen corresponding path program 12 times [2023-08-30 21:01:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:36,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751128916] [2023-08-30 21:01:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:01:36,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:36,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751128916] [2023-08-30 21:01:36,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751128916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:36,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198306905] [2023-08-30 21:01:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:01:36,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:36,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:36,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:36,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 21:01:36,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:01:36,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:01:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:01:36,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:01:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198306905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:36,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:36,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:01:36,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254900594] [2023-08-30 21:01:36,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:36,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:01:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:01:36,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:01:36,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 271 [2023-08-30 21:01:36,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 530 transitions, 11425 flow. Second operand has 18 states, 18 states have (on average 114.11111111111111) internal successors, (2054), 18 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:36,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:36,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 271 [2023-08-30 21:01:36,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:37,487 INFO L130 PetriNetUnfolder]: 656/1364 cut-off events. [2023-08-30 21:01:37,487 INFO L131 PetriNetUnfolder]: For 35717/35728 co-relation queries the response was YES. [2023-08-30 21:01:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13444 conditions, 1364 events. 656/1364 cut-off events. For 35717/35728 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8464 event pairs, 226 based on Foata normal form. 116/1479 useless extension candidates. Maximal degree in co-relation 13342. Up to 1014 conditions per place. [2023-08-30 21:01:37,501 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 247 selfloop transitions, 12 changer transitions 49/318 dead transitions. [2023-08-30 21:01:37,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 318 transitions, 7395 flow [2023-08-30 21:01:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:01:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:01:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 941 transitions. [2023-08-30 21:01:37,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43404059040590404 [2023-08-30 21:01:37,506 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 941 transitions. [2023-08-30 21:01:37,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 941 transitions. [2023-08-30 21:01:37,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:37,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 941 transitions. [2023-08-30 21:01:37,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.625) internal successors, (941), 8 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:37,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:37,509 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:37,510 INFO L175 Difference]: Start difference. First operand has 298 places, 530 transitions, 11425 flow. Second operand 8 states and 941 transitions. [2023-08-30 21:01:37,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 318 transitions, 7395 flow [2023-08-30 21:01:37,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 318 transitions, 6573 flow, removed 109 selfloop flow, removed 45 redundant places. [2023-08-30 21:01:37,632 INFO L231 Difference]: Finished difference. Result has 239 places, 260 transitions, 5055 flow [2023-08-30 21:01:37,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5883, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5055, PETRI_PLACES=239, PETRI_TRANSITIONS=260} [2023-08-30 21:01:37,633 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2023-08-30 21:01:37,633 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 260 transitions, 5055 flow [2023-08-30 21:01:37,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.11111111111111) internal successors, (2054), 18 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:37,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:37,634 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:37,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:37,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:37,834 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:37,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:37,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1511247871, now seen corresponding path program 13 times [2023-08-30 21:01:37,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:37,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318133262] [2023-08-30 21:01:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:37,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:37,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318133262] [2023-08-30 21:01:37,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318133262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:37,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858582866] [2023-08-30 21:01:37,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:01:37,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:37,986 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:37,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:01:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:01:38,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:01:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:01:38,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858582866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:38,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:38,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 18 [2023-08-30 21:01:38,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272668809] [2023-08-30 21:01:38,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:01:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:01:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:01:38,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2023-08-30 21:01:38,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 260 transitions, 5055 flow. Second operand has 19 states, 19 states have (on average 112.6842105263158) internal successors, (2141), 19 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:38,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:38,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2023-08-30 21:01:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:38,858 INFO L130 PetriNetUnfolder]: 902/1801 cut-off events. [2023-08-30 21:01:38,858 INFO L131 PetriNetUnfolder]: For 37066/37066 co-relation queries the response was YES. [2023-08-30 21:01:38,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15635 conditions, 1801 events. 902/1801 cut-off events. For 37066/37066 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11433 event pairs, 109 based on Foata normal form. 36/1837 useless extension candidates. Maximal degree in co-relation 15556. Up to 512 conditions per place. [2023-08-30 21:01:38,873 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 113 selfloop transitions, 147 changer transitions 102/370 dead transitions. [2023-08-30 21:01:38,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 370 transitions, 7386 flow [2023-08-30 21:01:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 21:01:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 21:01:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1631 transitions. [2023-08-30 21:01:38,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42988929889298894 [2023-08-30 21:01:38,875 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1631 transitions. [2023-08-30 21:01:38,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1631 transitions. [2023-08-30 21:01:38,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:38,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1631 transitions. [2023-08-30 21:01:38,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.5) internal successors, (1631), 14 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:38,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:38,882 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:38,882 INFO L175 Difference]: Start difference. First operand has 239 places, 260 transitions, 5055 flow. Second operand 14 states and 1631 transitions. [2023-08-30 21:01:38,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 370 transitions, 7386 flow [2023-08-30 21:01:38,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 370 transitions, 7116 flow, removed 44 selfloop flow, removed 26 redundant places. [2023-08-30 21:01:38,989 INFO L231 Difference]: Finished difference. Result has 214 places, 235 transitions, 4842 flow [2023-08-30 21:01:38,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4720, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4842, PETRI_PLACES=214, PETRI_TRANSITIONS=235} [2023-08-30 21:01:38,990 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-08-30 21:01:38,990 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 235 transitions, 4842 flow [2023-08-30 21:01:38,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 112.6842105263158) internal successors, (2141), 19 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:38,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:38,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:38,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 21:01:39,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:39,193 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:39,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1837096140, now seen corresponding path program 14 times [2023-08-30 21:01:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:39,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50591639] [2023-08-30 21:01:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:39,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:39,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50591639] [2023-08-30 21:01:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50591639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:39,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736727027] [2023-08-30 21:01:39,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:01:39,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:39,649 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:39,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:01:39,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:01:39,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:39,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:01:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:40,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:40,171 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 21:01:40,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-30 21:01:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:40,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736727027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:40,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:40,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-08-30 21:01:40,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914851297] [2023-08-30 21:01:40,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:40,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 21:01:40,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 21:01:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2023-08-30 21:01:41,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 271 [2023-08-30 21:01:41,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 235 transitions, 4842 flow. Second operand has 31 states, 31 states have (on average 100.80645161290323) internal successors, (3125), 31 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:41,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:41,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 271 [2023-08-30 21:01:41,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:43,381 INFO L130 PetriNetUnfolder]: 1227/2388 cut-off events. [2023-08-30 21:01:43,381 INFO L131 PetriNetUnfolder]: For 67716/67716 co-relation queries the response was YES. [2023-08-30 21:01:43,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22102 conditions, 2388 events. 1227/2388 cut-off events. For 67716/67716 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15339 event pairs, 143 based on Foata normal form. 100/2488 useless extension candidates. Maximal degree in co-relation 22031. Up to 863 conditions per place. [2023-08-30 21:01:43,399 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 275 selfloop transitions, 275 changer transitions 0/550 dead transitions. [2023-08-30 21:01:43,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 550 transitions, 11230 flow [2023-08-30 21:01:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 21:01:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 21:01:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3486 transitions. [2023-08-30 21:01:43,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898020798389802 [2023-08-30 21:01:43,402 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3486 transitions. [2023-08-30 21:01:43,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3486 transitions. [2023-08-30 21:01:43,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:43,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3486 transitions. [2023-08-30 21:01:43,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 105.63636363636364) internal successors, (3486), 33 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:43,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:43,409 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:43,409 INFO L175 Difference]: Start difference. First operand has 214 places, 235 transitions, 4842 flow. Second operand 33 states and 3486 transitions. [2023-08-30 21:01:43,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 550 transitions, 11230 flow [2023-08-30 21:01:43,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 550 transitions, 9489 flow, removed 830 selfloop flow, removed 22 redundant places. [2023-08-30 21:01:43,563 INFO L231 Difference]: Finished difference. Result has 193 places, 430 transitions, 8594 flow [2023-08-30 21:01:43,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4354, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8594, PETRI_PLACES=193, PETRI_TRANSITIONS=430} [2023-08-30 21:01:43,563 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2023-08-30 21:01:43,563 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 430 transitions, 8594 flow [2023-08-30 21:01:43,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 100.80645161290323) internal successors, (3125), 31 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:43,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:43,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:43,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:43,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:43,769 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:43,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:43,770 INFO L85 PathProgramCache]: Analyzing trace with hash 916049036, now seen corresponding path program 15 times [2023-08-30 21:01:43,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:43,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060696533] [2023-08-30 21:01:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:43,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:44,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060696533] [2023-08-30 21:01:44,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060696533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:44,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651048691] [2023-08-30 21:01:44,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:01:44,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:44,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:44,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:01:44,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:01:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 21:01:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:01:44,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:44,672 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 21:01:44,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-30 21:01:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:01:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651048691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:44,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 20 [2023-08-30 21:01:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162157126] [2023-08-30 21:01:44,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:44,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:01:44,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:01:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:01:45,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 271 [2023-08-30 21:01:45,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 430 transitions, 8594 flow. Second operand has 21 states, 21 states have (on average 107.33333333333333) internal successors, (2254), 21 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states 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 21:01:45,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:45,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 271 [2023-08-30 21:01:45,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:46,560 INFO L130 PetriNetUnfolder]: 1482/2827 cut-off events. [2023-08-30 21:01:46,560 INFO L131 PetriNetUnfolder]: For 61166/61169 co-relation queries the response was YES. [2023-08-30 21:01:46,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24141 conditions, 2827 events. 1482/2827 cut-off events. For 61166/61169 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18587 event pairs, 183 based on Foata normal form. 154/2980 useless extension candidates. Maximal degree in co-relation 24073. Up to 1237 conditions per place. [2023-08-30 21:01:46,582 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 369 selfloop transitions, 295 changer transitions 1/673 dead transitions. [2023-08-30 21:01:46,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 673 transitions, 13253 flow [2023-08-30 21:01:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:01:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:01:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3236 transitions. [2023-08-30 21:01:46,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41175722102048606 [2023-08-30 21:01:46,586 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3236 transitions. [2023-08-30 21:01:46,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3236 transitions. [2023-08-30 21:01:46,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:46,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3236 transitions. [2023-08-30 21:01:46,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.58620689655173) internal successors, (3236), 29 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states 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 21:01:46,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states 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 21:01:46,595 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states 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 21:01:46,595 INFO L175 Difference]: Start difference. First operand has 193 places, 430 transitions, 8594 flow. Second operand 29 states and 3236 transitions. [2023-08-30 21:01:46,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 673 transitions, 13253 flow [2023-08-30 21:01:46,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 673 transitions, 12017 flow, removed 550 selfloop flow, removed 9 redundant places. [2023-08-30 21:01:46,778 INFO L231 Difference]: Finished difference. Result has 221 places, 510 transitions, 9938 flow [2023-08-30 21:01:46,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7351, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9938, PETRI_PLACES=221, PETRI_TRANSITIONS=510} [2023-08-30 21:01:46,778 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2023-08-30 21:01:46,778 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 510 transitions, 9938 flow [2023-08-30 21:01:46,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.33333333333333) internal successors, (2254), 21 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states 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 21:01:46,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:46,779 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:46,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-30 21:01:46,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 21:01:46,980 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:46,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash 623757512, now seen corresponding path program 16 times [2023-08-30 21:01:46,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:46,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138301077] [2023-08-30 21:01:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:47,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:47,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138301077] [2023-08-30 21:01:47,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138301077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:47,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493901639] [2023-08-30 21:01:47,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:01:47,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:47,469 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:47,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:01:47,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:01:47,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:01:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:01:47,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 21:01:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:01:47,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:47,763 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_836) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-08-30 21:01:47,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:47,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-08-30 21:01:47,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 21:01:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 21:01:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493901639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:47,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:47,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-08-30 21:01:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799121582] [2023-08-30 21:01:47,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:47,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 21:01:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 21:01:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=529, Unknown=1, NotChecked=46, Total=650 [2023-08-30 21:01:47,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-08-30 21:01:47,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 510 transitions, 9938 flow. Second operand has 26 states, 26 states have (on average 91.96153846153847) internal successors, (2391), 26 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states 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 21:01:47,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:47,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-08-30 21:01:47,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:49,254 INFO L130 PetriNetUnfolder]: 1780/3393 cut-off events. [2023-08-30 21:01:49,254 INFO L131 PetriNetUnfolder]: For 76279/76279 co-relation queries the response was YES. [2023-08-30 21:01:49,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28571 conditions, 3393 events. 1780/3393 cut-off events. For 76279/76279 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22351 event pairs, 160 based on Foata normal form. 94/3477 useless extension candidates. Maximal degree in co-relation 28496. Up to 1144 conditions per place. [2023-08-30 21:01:49,287 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 335 selfloop transitions, 384 changer transitions 0/727 dead transitions. [2023-08-30 21:01:49,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 727 transitions, 14544 flow [2023-08-30 21:01:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:01:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:01:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2112 transitions. [2023-08-30 21:01:49,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35424354243542433 [2023-08-30 21:01:49,291 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2112 transitions. [2023-08-30 21:01:49,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2112 transitions. [2023-08-30 21:01:49,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:49,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2112 transitions. [2023-08-30 21:01:49,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 21:01:49,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 271.0) internal successors, (6233), 23 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states 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 21:01:49,298 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 271.0) internal successors, (6233), 23 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states 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 21:01:49,298 INFO L175 Difference]: Start difference. First operand has 221 places, 510 transitions, 9938 flow. Second operand 22 states and 2112 transitions. [2023-08-30 21:01:49,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 727 transitions, 14544 flow [2023-08-30 21:01:49,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 727 transitions, 13665 flow, removed 196 selfloop flow, removed 14 redundant places. [2023-08-30 21:01:49,611 INFO L231 Difference]: Finished difference. Result has 236 places, 613 transitions, 12301 flow [2023-08-30 21:01:49,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9153, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12301, PETRI_PLACES=236, PETRI_TRANSITIONS=613} [2023-08-30 21:01:49,611 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2023-08-30 21:01:49,611 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 613 transitions, 12301 flow [2023-08-30 21:01:49,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 91.96153846153847) internal successors, (2391), 26 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states 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 21:01:49,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:49,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:49,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:49,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 21:01:49,813 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:49,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1899490793, now seen corresponding path program 17 times [2023-08-30 21:01:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:49,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7888129] [2023-08-30 21:01:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:49,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:51,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:51,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7888129] [2023-08-30 21:01:51,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7888129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:51,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119241834] [2023-08-30 21:01:51,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:01:51,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:51,112 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:51,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:01:51,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:01:51,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:51,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 21:01:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:51,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 21:01:51,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 21:01:51,379 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 21:01:51,436 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 21:01:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:01:51,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 21:01:52,084 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 21:01:52,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:53,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:53,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 107 [2023-08-30 21:01:53,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:53,610 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 214 treesize of output 216 [2023-08-30 21:01:53,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:53,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 134 [2023-08-30 21:01:53,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:53,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 125 [2023-08-30 21:01:54,160 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-30 21:01:54,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 1 [2023-08-30 21:01:54,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:54,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 73 [2023-08-30 21:01:54,175 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:01:54,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 50 [2023-08-30 21:01:54,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:01:54,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 37 [2023-08-30 21:01:54,273 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 21:01:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119241834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:54,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:54,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 21:01:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396197183] [2023-08-30 21:01:54,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:54,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 21:01:54,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 21:01:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1682, Unknown=5, NotChecked=0, Total=1892 [2023-08-30 21:01:55,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-30 21:01:55,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 613 transitions, 12301 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:55,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:55,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-30 21:01:55,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:57,640 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 21:02:12,213 WARN L222 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:02:23,826 INFO L130 PetriNetUnfolder]: 1939/3696 cut-off events. [2023-08-30 21:02:23,826 INFO L131 PetriNetUnfolder]: For 86328/86328 co-relation queries the response was YES. [2023-08-30 21:02:23,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32151 conditions, 3696 events. 1939/3696 cut-off events. For 86328/86328 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24912 event pairs, 222 based on Foata normal form. 4/3694 useless extension candidates. Maximal degree in co-relation 32071. Up to 1806 conditions per place. [2023-08-30 21:02:23,860 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 373 selfloop transitions, 372 changer transitions 31/776 dead transitions. [2023-08-30 21:02:23,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 776 transitions, 15921 flow [2023-08-30 21:02:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:02:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:02:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2551 transitions. [2023-08-30 21:02:23,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26895097522403794 [2023-08-30 21:02:23,863 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2551 transitions. [2023-08-30 21:02:23,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2551 transitions. [2023-08-30 21:02:23,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:02:23,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2551 transitions. [2023-08-30 21:02:23,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 72.88571428571429) internal successors, (2551), 35 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states 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 21:02:23,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:23,872 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:23,872 INFO L175 Difference]: Start difference. First operand has 236 places, 613 transitions, 12301 flow. Second operand 35 states and 2551 transitions. [2023-08-30 21:02:23,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 776 transitions, 15921 flow [2023-08-30 21:02:24,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 776 transitions, 15218 flow, removed 279 selfloop flow, removed 10 redundant places. [2023-08-30 21:02:24,244 INFO L231 Difference]: Finished difference. Result has 275 places, 671 transitions, 13823 flow [2023-08-30 21:02:24,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11696, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13823, PETRI_PLACES=275, PETRI_TRANSITIONS=671} [2023-08-30 21:02:24,245 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-08-30 21:02:24,245 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 671 transitions, 13823 flow [2023-08-30 21:02:24,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:24,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:02:24,246 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:02:24,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 21:02:24,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 21:02:24,453 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:02:24,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:02:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1804431161, now seen corresponding path program 18 times [2023-08-30 21:02:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:02:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084579181] [2023-08-30 21:02:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:02:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:02:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:02:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:02:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084579181] [2023-08-30 21:02:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084579181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:02:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921323315] [2023-08-30 21:02:25,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:02:25,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:02:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:02:25,509 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:02:25,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:02:25,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:02:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:02:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-30 21:02:25,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:02:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:02:26,056 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 21:02:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:02:26,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:02:26,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:02:26,950 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 148 treesize of output 141 [2023-08-30 21:02:26,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:02:26,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 99 [2023-08-30 21:02:26,977 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 80 treesize of output 73 [2023-08-30 21:02:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:02:27,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921323315] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:02:27,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:02:27,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2023-08-30 21:02:27,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546876644] [2023-08-30 21:02:27,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:02:27,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 21:02:27,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:02:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 21:02:27,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1438, Unknown=4, NotChecked=0, Total=1560 [2023-08-30 21:02:30,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-08-30 21:02:30,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 671 transitions, 13823 flow. Second operand has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states 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 21:02:30,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:02:30,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-08-30 21:02:30,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:02:56,209 WARN L222 SmtUtils]: Spent 18.57s on a formula simplification. DAG size of input: 75 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:02:58,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:00,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:02,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:05,114 INFO L130 PetriNetUnfolder]: 1914/3659 cut-off events. [2023-08-30 21:03:05,114 INFO L131 PetriNetUnfolder]: For 86858/86858 co-relation queries the response was YES. [2023-08-30 21:03:05,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32777 conditions, 3659 events. 1914/3659 cut-off events. For 86858/86858 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24596 event pairs, 74 based on Foata normal form. 2/3643 useless extension candidates. Maximal degree in co-relation 32682. Up to 1041 conditions per place. [2023-08-30 21:03:05,154 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 405 selfloop transitions, 362 changer transitions 24/791 dead transitions. [2023-08-30 21:03:05,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 791 transitions, 16333 flow [2023-08-30 21:03:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:03:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:03:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2664 transitions. [2023-08-30 21:03:05,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2808645229309436 [2023-08-30 21:03:05,157 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2664 transitions. [2023-08-30 21:03:05,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2664 transitions. [2023-08-30 21:03:05,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:03:05,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2664 transitions. [2023-08-30 21:03:05,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 76.11428571428571) internal successors, (2664), 35 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states 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 21:03:05,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:05,167 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:05,168 INFO L175 Difference]: Start difference. First operand has 275 places, 671 transitions, 13823 flow. Second operand 35 states and 2664 transitions. [2023-08-30 21:03:05,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 791 transitions, 16333 flow [2023-08-30 21:03:05,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 791 transitions, 16007 flow, removed 127 selfloop flow, removed 13 redundant places. [2023-08-30 21:03:05,505 INFO L231 Difference]: Finished difference. Result has 300 places, 677 transitions, 14469 flow [2023-08-30 21:03:05,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=13563, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=14469, PETRI_PLACES=300, PETRI_TRANSITIONS=677} [2023-08-30 21:03:05,506 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-08-30 21:03:05,506 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 677 transitions, 14469 flow [2023-08-30 21:03:05,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states 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 21:03:05,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:03:05,507 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:03:05,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:03:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:03:05,708 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:03:05,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:03:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1667642457, now seen corresponding path program 19 times [2023-08-30 21:03:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:03:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137453212] [2023-08-30 21:03:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:03:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:03:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:03:06,843 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 21:03:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:03:06,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137453212] [2023-08-30 21:03:06,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137453212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:03:06,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673389323] [2023-08-30 21:03:06,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:03:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:03:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:03:06,845 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:03:06,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:03:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:03:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2023-08-30 21:03:06,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:03:07,018 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 21:03:07,065 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 21:03:07,121 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 21:03:07,173 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 21:03:07,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:03:07,339 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 21:03:07,829 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:03:07,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:03:07,831 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 34 treesize of output 15 [2023-08-30 21:03:07,937 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 21:03:07,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:03:17,387 WARN L222 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:03:18,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:03:18,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 72 [2023-08-30 21:03:18,100 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:03:18,100 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 105 treesize of output 89 [2023-08-30 21:03:18,104 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 64 treesize of output 52 [2023-08-30 21:03:18,112 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:03:18,112 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 77 treesize of output 65 [2023-08-30 21:03:18,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:03:18,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 106 [2023-08-30 21:03:18,167 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:03:18,167 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 210 treesize of output 213 [2023-08-30 21:03:18,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:03:18,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 133 [2023-08-30 21:03:18,229 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:03:18,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 125 [2023-08-30 21:03:19,220 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-30 21:03:19,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 1 [2023-08-30 21:03:19,375 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 21:03:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673389323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:03:19,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:03:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 21:03:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194251063] [2023-08-30 21:03:19,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:03:19,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 21:03:19,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:03:19,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 21:03:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1689, Unknown=5, NotChecked=0, Total=1892 [2023-08-30 21:03:20,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:03:23,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-30 21:03:23,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 677 transitions, 14469 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:23,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:03:23,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-30 21:03:23,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:03:44,902 WARN L222 SmtUtils]: Spent 9.08s on a formula simplification. DAG size of input: 126 DAG size of output: 122 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:03:46,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:04:07,342 WARN L222 SmtUtils]: Spent 18.57s on a formula simplification. DAG size of input: 111 DAG size of output: 110 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:04:21,794 WARN L222 SmtUtils]: Spent 14.34s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:04:37,763 WARN L222 SmtUtils]: Spent 12.99s on a formula simplification. DAG size of input: 132 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:04:45,565 WARN L222 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 124 DAG size of output: 120 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:04:47,754 WARN L539 Checker$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 21:04:49,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:04:54,625 WARN L539 Checker$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 21:04:57,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:05:18,560 WARN L222 SmtUtils]: Spent 16.92s on a formula simplification. DAG size of input: 111 DAG size of output: 110 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:05:27,397 WARN L222 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 152 DAG size of output: 115 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:05:38,282 WARN L222 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 134 DAG size of output: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:05:40,341 WARN L539 Checker$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 21:05:42,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:05:59,359 WARN L222 SmtUtils]: Spent 16.64s on a formula simplification. DAG size of input: 130 DAG size of output: 128 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:06:06,610 WARN L539 Checker$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 21:06:26,731 WARN L222 SmtUtils]: Spent 19.80s on a formula simplification. DAG size of input: 138 DAG size of output: 131 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:06:28,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 21:06:30,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 21:06:35,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:06:37,580 WARN L539 Checker$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 21:06:39,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:06:58,759 WARN L222 SmtUtils]: Spent 18.55s on a formula simplification. DAG size of input: 115 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:07:05,243 WARN L222 SmtUtils]: Spent 6.33s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:07:07,421 WARN L539 Checker$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 21:07:09,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:07:12,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:07:15,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:07:17,572 WARN L539 Checker$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 21:07:20,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:07:21,409 INFO L130 PetriNetUnfolder]: 2174/4120 cut-off events. [2023-08-30 21:07:21,410 INFO L131 PetriNetUnfolder]: For 105786/105786 co-relation queries the response was YES. [2023-08-30 21:07:21,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37670 conditions, 4120 events. 2174/4120 cut-off events. For 105786/105786 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28343 event pairs, 183 based on Foata normal form. 17/4119 useless extension candidates. Maximal degree in co-relation 37570. Up to 1420 conditions per place. [2023-08-30 21:07:21,451 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 500 selfloop transitions, 418 changer transitions 33/951 dead transitions. [2023-08-30 21:07:21,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 951 transitions, 19716 flow [2023-08-30 21:07:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 21:07:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 21:07:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3748 transitions. [2023-08-30 21:07:21,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2711815353447652 [2023-08-30 21:07:21,455 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3748 transitions. [2023-08-30 21:07:21,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3748 transitions. [2023-08-30 21:07:21,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:07:21,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3748 transitions. [2023-08-30 21:07:21,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 73.49019607843137) internal successors, (3748), 51 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states 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 21:07:21,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 271.0) internal successors, (14092), 52 states have internal predecessors, (14092), 0 states have call successors, (0), 0 states 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 21:07:21,470 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 271.0) internal successors, (14092), 52 states have internal predecessors, (14092), 0 states have call successors, (0), 0 states 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 21:07:21,470 INFO L175 Difference]: Start difference. First operand has 300 places, 677 transitions, 14469 flow. Second operand 51 states and 3748 transitions. [2023-08-30 21:07:21,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 951 transitions, 19716 flow [2023-08-30 21:07:21,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 951 transitions, 18215 flow, removed 53 selfloop flow, removed 24 redundant places. [2023-08-30 21:07:21,901 INFO L231 Difference]: Finished difference. Result has 342 places, 790 transitions, 16466 flow [2023-08-30 21:07:21,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=13158, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=16466, PETRI_PLACES=342, PETRI_TRANSITIONS=790} [2023-08-30 21:07:21,903 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 321 predicate places. [2023-08-30 21:07:21,903 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 790 transitions, 16466 flow [2023-08-30 21:07:21,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:21,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:07:21,904 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:07:21,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 21:07:22,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:07:22,111 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:07:22,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:07:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1591331893, now seen corresponding path program 20 times [2023-08-30 21:07:22,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:07:22,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655441331] [2023-08-30 21:07:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:07:22,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:07:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:07:22,996 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 21:07:22,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:07:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655441331] [2023-08-30 21:07:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655441331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:07:22,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434801335] [2023-08-30 21:07:22,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:07:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:07:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:07:22,999 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:07:23,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 21:07:23,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:07:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:07:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-30 21:07:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:07:23,622 INFO L321 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-30 21:07:23,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-08-30 21:07:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:23,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:07:24,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:07:24,554 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 80 treesize of output 91 [2023-08-30 21:07:25,649 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 21:07:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434801335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:07:25,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:07:25,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 21:07:25,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000350499] [2023-08-30 21:07:25,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:07:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 21:07:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:07:25,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 21:07:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 21:07:29,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2023-08-30 21:07:29,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 790 transitions, 16466 flow. Second operand has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states 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 21:07:29,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:07:29,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2023-08-30 21:07:29,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:07:44,131 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 143 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:07:49,503 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 21:07:55,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:07:59,407 INFO L130 PetriNetUnfolder]: 2387/4480 cut-off events. [2023-08-30 21:07:59,407 INFO L131 PetriNetUnfolder]: For 93190/93190 co-relation queries the response was YES. [2023-08-30 21:07:59,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41644 conditions, 4480 events. 2387/4480 cut-off events. For 93190/93190 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30953 event pairs, 366 based on Foata normal form. 4/4462 useless extension candidates. Maximal degree in co-relation 41530. Up to 1613 conditions per place. [2023-08-30 21:07:59,454 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 566 selfloop transitions, 438 changer transitions 30/1034 dead transitions. [2023-08-30 21:07:59,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1034 transitions, 22087 flow [2023-08-30 21:07:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 21:07:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 21:07:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4277 transitions. [2023-08-30 21:07:59,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34309321354083105 [2023-08-30 21:07:59,458 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4277 transitions. [2023-08-30 21:07:59,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4277 transitions. [2023-08-30 21:07:59,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:07:59,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4277 transitions. [2023-08-30 21:07:59,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 92.97826086956522) internal successors, (4277), 46 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states 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 21:07:59,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 271.0) internal successors, (12737), 47 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states 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 21:07:59,471 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 271.0) internal successors, (12737), 47 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states 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 21:07:59,471 INFO L175 Difference]: Start difference. First operand has 342 places, 790 transitions, 16466 flow. Second operand 46 states and 4277 transitions. [2023-08-30 21:07:59,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1034 transitions, 22087 flow [2023-08-30 21:08:00,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1034 transitions, 21310 flow, removed 311 selfloop flow, removed 14 redundant places. [2023-08-30 21:08:00,120 INFO L231 Difference]: Finished difference. Result has 390 places, 913 transitions, 19712 flow [2023-08-30 21:08:00,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=15873, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=19712, PETRI_PLACES=390, PETRI_TRANSITIONS=913} [2023-08-30 21:08:00,121 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 369 predicate places. [2023-08-30 21:08:00,121 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 913 transitions, 19712 flow [2023-08-30 21:08:00,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 89.53658536585365) internal successors, (3671), 41 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states 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 21:08:00,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:08:00,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:08:00,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 21:08:00,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 21:08:00,328 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:08:00,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:08:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1228521943, now seen corresponding path program 21 times [2023-08-30 21:08:00,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:08:00,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398124529] [2023-08-30 21:08:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:08:00,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:08:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:08:01,441 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 21:08:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:08:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398124529] [2023-08-30 21:08:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398124529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:08:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137501252] [2023-08-30 21:08:01,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:08:01,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:08:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:08:01,443 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:08:01,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 21:08:01,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:08:01,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:08:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 77 conjunts are in the unsatisfiable core [2023-08-30 21:08:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:08:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:08:02,040 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 21:08:02,400 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-08-30 21:08:02,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-08-30 21:08:02,627 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 21:08:02,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:08:03,416 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:08:03,417 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 321 treesize of output 267 [2023-08-30 21:08:03,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:03,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 223 [2023-08-30 21:08:03,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:03,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 208 [2023-08-30 21:08:03,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:03,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 183 [2023-08-30 21:08:05,641 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 21:08:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137501252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:08:05,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:08:05,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 21:08:05,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744158529] [2023-08-30 21:08:05,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:08:05,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 21:08:05,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:08:05,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 21:08:05,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1697, Unknown=1, NotChecked=0, Total=1892 [2023-08-30 21:08:09,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-08-30 21:08:09,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 913 transitions, 19712 flow. Second operand has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states 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 21:08:09,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:08:09,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-08-30 21:08:09,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:08:25,273 WARN L222 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:08:45,585 WARN L222 SmtUtils]: Spent 18.73s on a formula simplification. DAG size of input: 142 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:09:18,622 WARN L222 SmtUtils]: Spent 32.82s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:09:46,660 WARN L222 SmtUtils]: Spent 26.45s on a formula simplification. DAG size of input: 154 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:09:48,721 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 21:10:12,259 WARN L222 SmtUtils]: Spent 23.41s on a formula simplification. DAG size of input: 125 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:10:49,362 WARN L222 SmtUtils]: Spent 36.78s on a formula simplification. DAG size of input: 148 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:22,825 WARN L222 SmtUtils]: Spent 33.13s on a formula simplification. DAG size of input: 107 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:39,778 WARN L222 SmtUtils]: Spent 16.47s on a formula simplification. DAG size of input: 108 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:41,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:11:57,139 WARN L222 SmtUtils]: Spent 14.54s on a formula simplification. DAG size of input: 131 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:59,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:12:01,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:12:03,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:12:22,377 WARN L222 SmtUtils]: Spent 17.64s on a formula simplification. DAG size of input: 128 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:12:23,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:12:25,658 WARN L539 Checker$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 21:12:28,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:12:30,362 WARN L539 Checker$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 21:12:37,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 21:12:38,487 INFO L130 PetriNetUnfolder]: 2523/4764 cut-off events. [2023-08-30 21:12:38,488 INFO L131 PetriNetUnfolder]: For 111868/111868 co-relation queries the response was YES. [2023-08-30 21:12:38,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 4764 events. 2523/4764 cut-off events. For 111868/111868 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33656 event pairs, 295 based on Foata normal form. 51/4791 useless extension candidates. Maximal degree in co-relation 45357. Up to 1280 conditions per place. [2023-08-30 21:12:38,543 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 490 selfloop transitions, 621 changer transitions 46/1157 dead transitions. [2023-08-30 21:12:38,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1157 transitions, 25197 flow [2023-08-30 21:12:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 21:12:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 21:12:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3673 transitions. [2023-08-30 21:12:38,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2823646986469865 [2023-08-30 21:12:38,547 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3673 transitions. [2023-08-30 21:12:38,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3673 transitions. [2023-08-30 21:12:38,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:12:38,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3673 transitions. [2023-08-30 21:12:38,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 76.52083333333333) internal successors, (3673), 48 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states 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 21:12:38,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states 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 21:12:38,562 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states 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 21:12:38,562 INFO L175 Difference]: Start difference. First operand has 390 places, 913 transitions, 19712 flow. Second operand 48 states and 3673 transitions. [2023-08-30 21:12:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1157 transitions, 25197 flow [2023-08-30 21:12:39,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 1157 transitions, 24651 flow, removed 244 selfloop flow, removed 12 redundant places. [2023-08-30 21:12:39,416 INFO L231 Difference]: Finished difference. Result has 434 places, 995 transitions, 22800 flow [2023-08-30 21:12:39,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=18868, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=22800, PETRI_PLACES=434, PETRI_TRANSITIONS=995} [2023-08-30 21:12:39,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 413 predicate places. [2023-08-30 21:12:39,418 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 995 transitions, 22800 flow [2023-08-30 21:12:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states 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 21:12:39,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:12:39,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:12:39,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 21:12:39,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 21:12:39,625 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:12:39,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:12:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1946674451, now seen corresponding path program 22 times [2023-08-30 21:12:39,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:12:39,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742770632] [2023-08-30 21:12:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:12:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:12:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:12:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:12:40,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:12:40,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742770632] [2023-08-30 21:12:40,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742770632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:12:40,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649349844] [2023-08-30 21:12:40,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:12:40,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:12:40,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:12:40,628 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:12:40,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 21:12:40,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:12:40,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:12:40,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-30 21:12:40,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:12:40,842 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 21:12:40,889 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 21:12:40,944 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 21:12:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:12:41,321 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 25 treesize of output 25 [2023-08-30 21:12:41,533 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:12:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:12:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:12:41,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:12:41,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2023-08-30 21:12:41,643 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 21:12:41,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:12:41,880 WARN L839 $PredicateComparison]: unable to prove that (and (= (mod c_~x~0 4294967296) (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296)) (forall ((v_ArrVal_1088 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1088) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) c_~N~0))) is different from false [2023-08-30 21:12:41,993 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) (and (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296)) (forall ((v_ArrVal_1088 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1088) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) c_~N~0))) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0))) is different from false [2023-08-30 21:12:52,762 WARN L222 SmtUtils]: Spent 10.33s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:12:57,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:12:57,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 90 [2023-08-30 21:12:57,100 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:12:57,100 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 170 treesize of output 173 [2023-08-30 21:12:57,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 63 [2023-08-30 21:12:57,144 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 21:12:57,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 97 [2023-08-30 21:12:57,705 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-08-30 21:12:57,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 1 [2023-08-30 21:12:57,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:12:57,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 56 [2023-08-30 21:12:57,724 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:12:57,724 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 65 treesize of output 49 [2023-08-30 21:12:57,731 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:12:57,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2023-08-30 21:12:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 21:12:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649349844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:12:57,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:12:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-30 21:12:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888282149] [2023-08-30 21:12:57,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:12:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 21:12:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:12:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 21:12:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1371, Unknown=14, NotChecked=154, Total=1722 [2023-08-30 21:12:58,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-08-30 21:12:58,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 995 transitions, 22800 flow. Second operand has 42 states, 42 states have (on average 69.38095238095238) internal successors, (2914), 42 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states 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 21:12:58,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:12:58,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-08-30 21:12:58,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:12:59,321 WARN L839 $PredicateComparison]: unable to prove that (and (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) (and (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296)) (forall ((v_ArrVal_1088 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1088) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) c_~N~0))) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0))) (or (< c_~q_back~0 0) (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse2 (< c_~n~0 (+ 3 c_~q_back~0)))) (and (or (< c_~n~0 (+ c_~q_front~0 4)) .cse2) (or .cse2 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((~C~0 Int)) (let ((.cse3 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse3) 4294967296) (mod (+ c_~y~0 .cse3) 4294967296)))) .cse2) (or (< c_~q_front~0 (+ c_~q_back~0 1)) .cse2))))) is different from false [2023-08-30 21:13:03,700 INFO L130 PetriNetUnfolder]: 2823/5278 cut-off events. [2023-08-30 21:13:03,700 INFO L131 PetriNetUnfolder]: For 133094/133094 co-relation queries the response was YES. [2023-08-30 21:13:03,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53342 conditions, 5278 events. 2823/5278 cut-off events. For 133094/133094 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 37660 event pairs, 253 based on Foata normal form. 2/5256 useless extension candidates. Maximal degree in co-relation 53197. Up to 2095 conditions per place. [2023-08-30 21:13:03,765 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 650 selfloop transitions, 588 changer transitions 19/1257 dead transitions. [2023-08-30 21:13:03,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1257 transitions, 30290 flow [2023-08-30 21:13:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:13:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:13:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1905 transitions. [2023-08-30 21:13:03,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27036616520011353 [2023-08-30 21:13:03,768 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1905 transitions. [2023-08-30 21:13:03,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1905 transitions. [2023-08-30 21:13:03,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:03,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1905 transitions. [2023-08-30 21:13:03,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.26923076923077) internal successors, (1905), 26 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states 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 21:13:03,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:03,774 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:03,774 INFO L175 Difference]: Start difference. First operand has 434 places, 995 transitions, 22800 flow. Second operand 26 states and 1905 transitions. [2023-08-30 21:13:03,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1257 transitions, 30290 flow [2023-08-30 21:13:04,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1257 transitions, 29527 flow, removed 314 selfloop flow, removed 19 redundant places. [2023-08-30 21:13:04,861 INFO L231 Difference]: Finished difference. Result has 440 places, 1124 transitions, 26971 flow [2023-08-30 21:13:04,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=22154, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26971, PETRI_PLACES=440, PETRI_TRANSITIONS=1124} [2023-08-30 21:13:04,862 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 419 predicate places. [2023-08-30 21:13:04,862 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 1124 transitions, 26971 flow [2023-08-30 21:13:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 69.38095238095238) internal successors, (2914), 42 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states 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 21:13:04,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:04,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:04,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 21:13:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:05,064 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:05,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:05,065 INFO L85 PathProgramCache]: Analyzing trace with hash -873840017, now seen corresponding path program 23 times [2023-08-30 21:13:05,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:05,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156063499] [2023-08-30 21:13:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:05,982 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 21:13:05,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156063499] [2023-08-30 21:13:05,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156063499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:05,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976158101] [2023-08-30 21:13:05,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:13:05,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:05,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:05,984 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:05,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 21:13:06,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:13:06,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 21:13:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:13:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:06,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:13:06,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-08-30 21:13:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:13:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976158101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:07,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:07,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-08-30 21:13:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620747148] [2023-08-30 21:13:07,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:07,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:13:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:13:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 21:13:08,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15