./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/clever.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/clever.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 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --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 19:22:10,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:22:10,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:22:10,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:22:10,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:22:10,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:22:10,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:22:10,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:22:10,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:22:10,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:22:10,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:22:10,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:22:10,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:22:10,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:22:10,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:22:10,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:22:10,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:22:10,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:22:10,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:22:10,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:22:10,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:22:10,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:22:10,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:22:10,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:22:10,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:22:10,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:22:10,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:22:10,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:22:10,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:22:10,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:22:10,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:22:10,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:22:10,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:22:10,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:22:10,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:22:10,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:22:10,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:22:10,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:22:10,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:22:10,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:22:10,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:22:10,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:22:10,646 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:22:10,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:22:10,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:22:10,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:22:10,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:22:10,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:22:10,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:22:10,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:22:10,649 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:22:10,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:22:10,650 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:22:10,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:22:10,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:22:10,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:22:10,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:22:10,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:22:10,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:22:10,652 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:22:10,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:22:10,652 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:22:10,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:22:10,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:22:10,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:22:10,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:22:10,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:22:10,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:22:10,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:22:10,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:22:10,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:22:10,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:22:10,654 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:22:10,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:22:10,655 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:22:10,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:22:10,655 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:22:10,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:22:10,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:22:10,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:22:10,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:22:10,978 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:22:10,979 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:22:10,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-30 19:22:12,194 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:22:12,428 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:22:12,428 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-30 19:22:12,439 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f961666c/b3adb0264bb44a14a7b497d2f1c8710b/FLAGf3dd4fe55 [2023-08-30 19:22:12,459 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f961666c/b3adb0264bb44a14a7b497d2f1c8710b [2023-08-30 19:22:12,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:22:12,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:22:12,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:22:12,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:22:12,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:22:12,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d426cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12, skipping insertion in model container [2023-08-30 19:22:12,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:22:12,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:22:12,643 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/clever.wvr.c[2133,2146] [2023-08-30 19:22:12,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:22:12,658 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:22:12,691 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/clever.wvr.c[2133,2146] [2023-08-30 19:22:12,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:22:12,709 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:22:12,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12 WrapperNode [2023-08-30 19:22:12,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:22:12,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:22:12,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:22:12,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:22:12,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,760 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-08-30 19:22:12,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:22:12,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:22:12,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:22:12,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:22:12,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,801 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:22:12,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:22:12,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:22:12,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:22:12,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (1/1) ... [2023-08-30 19:22:12,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:22:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:12,838 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 19:22:12,862 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 19:22:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:22:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:22:12,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:22:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:22:12,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:22:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:22:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:22:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:22:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:22:12,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:22:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:22:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:22:12,885 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 19:22:12,989 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:22:12,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:22:13,244 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:22:13,250 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:22:13,250 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:22:13,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:22:13 BoogieIcfgContainer [2023-08-30 19:22:13,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:22:13,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:22:13,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:22:13,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:22:13,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:22:12" (1/3) ... [2023-08-30 19:22:13,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2440e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:22:13, skipping insertion in model container [2023-08-30 19:22:13,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:22:12" (2/3) ... [2023-08-30 19:22:13,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2440e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:22:13, skipping insertion in model container [2023-08-30 19:22:13,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:22:13" (3/3) ... [2023-08-30 19:22:13,260 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-08-30 19:22:13,267 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:22:13,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:22:13,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:22:13,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:22:13,339 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:22:13,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2023-08-30 19:22:13,428 INFO L130 PetriNetUnfolder]: 9/117 cut-off events. [2023-08-30 19:22:13,429 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:22:13,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-30 19:22:13,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2023-08-30 19:22:13,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2023-08-30 19:22:13,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:22:13,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 109 transitions, 230 flow [2023-08-30 19:22:13,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 109 transitions, 230 flow [2023-08-30 19:22:13,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 230 flow [2023-08-30 19:22:13,488 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-08-30 19:22:13,488 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:22:13,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 9/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-30 19:22:13,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2023-08-30 19:22:16,668 INFO L134 LiptonReduction]: Checked pairs total: 744 [2023-08-30 19:22:16,668 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-30 19:22:16,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:22:16,687 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;@c7e2fb0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:22:16,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:22:16,692 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-08-30 19:22:16,692 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:22:16,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:16,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:16,694 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 19:22:16,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -259219510, now seen corresponding path program 1 times [2023-08-30 19:22:16,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:16,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313743608] [2023-08-30 19:22:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:17,183 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 19:22:17,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:17,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313743608] [2023-08-30 19:22:17,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313743608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:17,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:17,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 19:22:17,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553935699] [2023-08-30 19:22:17,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:17,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:22:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:22:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:22:17,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2023-08-30 19:22:17,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 19:22:17,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:17,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2023-08-30 19:22:17,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:17,352 INFO L130 PetriNetUnfolder]: 69/117 cut-off events. [2023-08-30 19:22:17,353 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 19:22:17,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 117 events. 69/117 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-08-30 19:22:17,358 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-30 19:22:17,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 27 transitions, 129 flow [2023-08-30 19:22:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:22:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:22:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-30 19:22:17,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2023-08-30 19:22:17,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-30 19:22:17,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-30 19:22:17,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:17,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-30 19:22:17,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 19:22:17,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 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 19:22:17,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 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 19:22:17,396 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 334 transitions. [2023-08-30 19:22:17,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 27 transitions, 129 flow [2023-08-30 19:22:17,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:22:17,400 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 53 flow [2023-08-30 19:22:17,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-08-30 19:22:17,405 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-08-30 19:22:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 53 flow [2023-08-30 19:22:17,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 19:22:17,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:17,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:17,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:22:17,407 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 19:22:17,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1272176076, now seen corresponding path program 1 times [2023-08-30 19:22:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:17,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043330602] [2023-08-30 19:22:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043330602] [2023-08-30 19:22:17,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043330602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:17,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:17,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:22:17,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600968723] [2023-08-30 19:22:17,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:17,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:22:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:22:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:22:17,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-08-30 19:22:17,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:22:17,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:17,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-08-30 19:22:17,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:17,657 INFO L130 PetriNetUnfolder]: 121/217 cut-off events. [2023-08-30 19:22:17,658 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-30 19:22:17,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 217 events. 121/217 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 688 event pairs, 18 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 201. Up to 130 conditions per place. [2023-08-30 19:22:17,661 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 35 selfloop transitions, 6 changer transitions 8/49 dead transitions. [2023-08-30 19:22:17,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 49 transitions, 243 flow [2023-08-30 19:22:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-08-30 19:22:17,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2023-08-30 19:22:17,665 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-08-30 19:22:17,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-08-30 19:22:17,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:17,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-08-30 19:22:17,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:17,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:22:17,671 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:22:17,671 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 53 flow. Second operand 5 states and 535 transitions. [2023-08-30 19:22:17,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 49 transitions, 243 flow [2023-08-30 19:22:17,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 49 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:22:17,674 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 99 flow [2023-08-30 19:22:17,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=50, 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-08-30 19:22:17,675 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-30 19:22:17,675 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 99 flow [2023-08-30 19:22:17,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:22:17,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:17,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:17,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:22:17,676 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 19:22:17,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1400720826, now seen corresponding path program 2 times [2023-08-30 19:22:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:17,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108003880] [2023-08-30 19:22:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:17,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:17,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108003880] [2023-08-30 19:22:17,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108003880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:17,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:22:17,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:22:17,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111166995] [2023-08-30 19:22:17,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:17,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:22:17,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:22:17,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:22:17,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-08-30 19:22:17,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:22:17,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:17,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-08-30 19:22:17,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:17,910 INFO L130 PetriNetUnfolder]: 110/185 cut-off events. [2023-08-30 19:22:17,910 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-30 19:22:17,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 185 events. 110/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 513 event pairs, 14 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 190. Up to 128 conditions per place. [2023-08-30 19:22:17,912 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 29 selfloop transitions, 7 changer transitions 5/41 dead transitions. [2023-08-30 19:22:17,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 247 flow [2023-08-30 19:22:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 529 transitions. [2023-08-30 19:22:17,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232142857142856 [2023-08-30 19:22:17,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 529 transitions. [2023-08-30 19:22:17,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 529 transitions. [2023-08-30 19:22:17,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:17,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 529 transitions. [2023-08-30 19:22:17,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 19:22:17,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:22:17,927 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:22:17,928 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 99 flow. Second operand 5 states and 529 transitions. [2023-08-30 19:22:17,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 247 flow [2023-08-30 19:22:17,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:22:17,930 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 127 flow [2023-08-30 19:22:17,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-30 19:22:17,932 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-08-30 19:22:17,934 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 127 flow [2023-08-30 19:22:17,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:22:17,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:17,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:17,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:22:17,936 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 19:22:17,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1139161799, now seen corresponding path program 1 times [2023-08-30 19:22:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:17,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136034121] [2023-08-30 19:22:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:22:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:18,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136034121] [2023-08-30 19:22:18,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136034121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751653492] [2023-08-30 19:22:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:18,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:18,049 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 19:22:18,076 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 19:22:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 19:22:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:22:18,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:22:18,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751653492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:18,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:18,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-30 19:22:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824559179] [2023-08-30 19:22:18,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:18,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:22:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:22:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:22:18,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:22:18,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 19:22:18,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:18,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:22:18,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:18,371 INFO L130 PetriNetUnfolder]: 108/175 cut-off events. [2023-08-30 19:22:18,371 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 19:22:18,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 175 events. 108/175 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 466 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 289. Up to 91 conditions per place. [2023-08-30 19:22:18,373 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-08-30 19:22:18,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 264 flow [2023-08-30 19:22:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:22:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:22:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-08-30 19:22:18,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2023-08-30 19:22:18,376 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-08-30 19:22:18,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-08-30 19:22:18,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:18,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-08-30 19:22:18,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 19:22:18,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:22:18,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:22:18,380 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 127 flow. Second operand 5 states and 515 transitions. [2023-08-30 19:22:18,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 264 flow [2023-08-30 19:22:18,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 252 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 19:22:18,385 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 144 flow [2023-08-30 19:22:18,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-30 19:22:18,386 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2023-08-30 19:22:18,386 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 144 flow [2023-08-30 19:22:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 19:22:18,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:18,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:18,398 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 19:22:18,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:18,594 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 19:22:18,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1197066339, now seen corresponding path program 1 times [2023-08-30 19:22:18,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:18,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572027257] [2023-08-30 19:22:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:18,975 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 19:22:18,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:18,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572027257] [2023-08-30 19:22:18,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572027257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:18,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117210783] [2023-08-30 19:22:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:18,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:18,979 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 19:22:19,002 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 19:22:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:22:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:25,641 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 19:22:25,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:25,950 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 19:22:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117210783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:25,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:25,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 19:22:25,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249399057] [2023-08-30 19:22:25,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:25,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=108, Unknown=3, NotChecked=0, Total=156 [2023-08-30 19:22:28,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:30,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:32,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:34,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:36,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:38,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:38,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-30 19:22:38,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states 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 19:22:38,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:38,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-30 19:22:38,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:22:39,189 INFO L130 PetriNetUnfolder]: 260/427 cut-off events. [2023-08-30 19:22:39,189 INFO L131 PetriNetUnfolder]: For 528/528 co-relation queries the response was YES. [2023-08-30 19:22:39,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 427 events. 260/427 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1514 event pairs, 18 based on Foata normal form. 10/437 useless extension candidates. Maximal degree in co-relation 598. Up to 221 conditions per place. [2023-08-30 19:22:39,193 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 55 selfloop transitions, 20 changer transitions 14/89 dead transitions. [2023-08-30 19:22:39,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 89 transitions, 618 flow [2023-08-30 19:22:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:22:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:22:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 915 transitions. [2023-08-30 19:22:39,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40848214285714285 [2023-08-30 19:22:39,198 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 915 transitions. [2023-08-30 19:22:39,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 915 transitions. [2023-08-30 19:22:39,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:22:39,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 915 transitions. [2023-08-30 19:22:39,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.5) internal successors, (915), 10 states have internal predecessors, (915), 0 states have call successors, (0), 0 states 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 19:22:39,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states 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 19:22:39,207 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states 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 19:22:39,207 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 144 flow. Second operand 10 states and 915 transitions. [2023-08-30 19:22:39,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 89 transitions, 618 flow [2023-08-30 19:22:39,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 89 transitions, 600 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 19:22:39,211 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 307 flow [2023-08-30 19:22:39,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=307, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-30 19:22:39,212 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2023-08-30 19:22:39,212 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 307 flow [2023-08-30 19:22:39,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states 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 19:22:39,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:39,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:22:39,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 19:22:39,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:39,414 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 19:22:39,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1971463267, now seen corresponding path program 2 times [2023-08-30 19:22:39,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:39,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067886642] [2023-08-30 19:22:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:39,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:39,829 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 19:22:39,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067886642] [2023-08-30 19:22:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067886642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289361812] [2023-08-30 19:22:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:22:39,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:39,831 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 19:22:39,837 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 19:22:39,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:22:39,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:22:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:44,462 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 19:22:44,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:22:44,760 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 19:22:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289361812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:22:44,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:22:44,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 19:22:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619139056] [2023-08-30 19:22:44,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:22:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:22:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:22:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=102, Unknown=2, NotChecked=0, Total=156 [2023-08-30 19:22:46,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:49,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:51,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:53,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:56,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:22:59,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:01,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-30 19:23:01,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 19:23:01,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:01,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-30 19:23:01,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:02,872 INFO L130 PetriNetUnfolder]: 612/1001 cut-off events. [2023-08-30 19:23:02,872 INFO L131 PetriNetUnfolder]: For 2162/2162 co-relation queries the response was YES. [2023-08-30 19:23:02,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 1001 events. 612/1001 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4333 event pairs, 30 based on Foata normal form. 7/1008 useless extension candidates. Maximal degree in co-relation 4336. Up to 537 conditions per place. [2023-08-30 19:23:02,881 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 99 selfloop transitions, 59 changer transitions 7/165 dead transitions. [2023-08-30 19:23:02,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 165 transitions, 1402 flow [2023-08-30 19:23:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:23:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:23:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-08-30 19:23:02,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40982142857142856 [2023-08-30 19:23:02,885 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-08-30 19:23:02,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-08-30 19:23:02,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:02,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-08-30 19:23:02,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 19:23:02,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 19:23:02,895 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 19:23:02,895 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 307 flow. Second operand 15 states and 1377 transitions. [2023-08-30 19:23:02,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 165 transitions, 1402 flow [2023-08-30 19:23:02,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 165 transitions, 1259 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-08-30 19:23:02,906 INFO L231 Difference]: Finished difference. Result has 60 places, 86 transitions, 847 flow [2023-08-30 19:23:02,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=847, PETRI_PLACES=60, PETRI_TRANSITIONS=86} [2023-08-30 19:23:02,909 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2023-08-30 19:23:02,910 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 86 transitions, 847 flow [2023-08-30 19:23:02,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 19:23:02,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:02,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:02,917 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 19:23:03,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:03,117 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 19:23:03,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash -237029505, now seen corresponding path program 3 times [2023-08-30 19:23:03,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:03,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485395566] [2023-08-30 19:23:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:03,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:03,550 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 19:23:03,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:03,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485395566] [2023-08-30 19:23:03,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485395566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:03,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130693284] [2023-08-30 19:23:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:23:03,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:03,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:03,553 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 19:23:03,560 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 19:23:03,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:23:03,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:03,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 19:23:03,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:06,097 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 19:23:06,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:06,391 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 19:23:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130693284] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:06,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:06,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 19:23:06,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776360182] [2023-08-30 19:23:06,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:06,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:23:06,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:06,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:23:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=104, Unknown=1, NotChecked=0, Total=156 [2023-08-30 19:23:08,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:10,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:13,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:14,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:17,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:19,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:19,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-30 19:23:19,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 86 transitions, 847 flow. Second operand has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 19:23:19,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:19,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-30 19:23:19,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:20,293 INFO L130 PetriNetUnfolder]: 1100/1797 cut-off events. [2023-08-30 19:23:20,293 INFO L131 PetriNetUnfolder]: For 7302/7302 co-relation queries the response was YES. [2023-08-30 19:23:20,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9172 conditions, 1797 events. 1100/1797 cut-off events. For 7302/7302 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8789 event pairs, 172 based on Foata normal form. 4/1801 useless extension candidates. Maximal degree in co-relation 7097. Up to 977 conditions per place. [2023-08-30 19:23:20,308 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 106 selfloop transitions, 80 changer transitions 5/191 dead transitions. [2023-08-30 19:23:20,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 191 transitions, 2112 flow [2023-08-30 19:23:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:23:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:23:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 908 transitions. [2023-08-30 19:23:20,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40535714285714286 [2023-08-30 19:23:20,312 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 908 transitions. [2023-08-30 19:23:20,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 908 transitions. [2023-08-30 19:23:20,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:20,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 908 transitions. [2023-08-30 19:23:20,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.8) internal successors, (908), 10 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 19:23:20,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states 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 19:23:20,318 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states 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 19:23:20,318 INFO L175 Difference]: Start difference. First operand has 60 places, 86 transitions, 847 flow. Second operand 10 states and 908 transitions. [2023-08-30 19:23:20,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 191 transitions, 2112 flow [2023-08-30 19:23:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 1928 flow, removed 89 selfloop flow, removed 2 redundant places. [2023-08-30 19:23:20,336 INFO L231 Difference]: Finished difference. Result has 71 places, 132 transitions, 1490 flow [2023-08-30 19:23:20,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1490, PETRI_PLACES=71, PETRI_TRANSITIONS=132} [2023-08-30 19:23:20,337 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2023-08-30 19:23:20,337 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 132 transitions, 1490 flow [2023-08-30 19:23:20,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 19:23:20,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:20,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:20,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 19:23:20,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:20,544 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 19:23:20,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1704426119, now seen corresponding path program 1 times [2023-08-30 19:23:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:20,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585890177] [2023-08-30 19:23:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:20,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:23:20,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:20,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585890177] [2023-08-30 19:23:20,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585890177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:20,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749767976] [2023-08-30 19:23:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:20,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:20,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:20,665 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 19:23:20,669 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 19:23:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:23:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:23:20,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:23:20,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749767976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:20,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:20,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-30 19:23:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157246038] [2023-08-30 19:23:20,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:20,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:23:20,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:23:20,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:23:20,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:23:20,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 132 transitions, 1490 flow. Second operand has 10 states, 10 states have (on average 98.8) internal successors, (988), 10 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 19:23:20,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:20,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:23:20,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:21,692 INFO L130 PetriNetUnfolder]: 2041/3411 cut-off events. [2023-08-30 19:23:21,693 INFO L131 PetriNetUnfolder]: For 19991/19991 co-relation queries the response was YES. [2023-08-30 19:23:21,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18724 conditions, 3411 events. 2041/3411 cut-off events. For 19991/19991 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19781 event pairs, 67 based on Foata normal form. 64/3475 useless extension candidates. Maximal degree in co-relation 13927. Up to 1821 conditions per place. [2023-08-30 19:23:21,718 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 324 selfloop transitions, 103 changer transitions 5/432 dead transitions. [2023-08-30 19:23:21,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 432 transitions, 5461 flow [2023-08-30 19:23:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:23:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:23:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1241 transitions. [2023-08-30 19:23:21,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616815476190476 [2023-08-30 19:23:21,723 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1241 transitions. [2023-08-30 19:23:21,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1241 transitions. [2023-08-30 19:23:21,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:21,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1241 transitions. [2023-08-30 19:23:21,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.41666666666667) internal successors, (1241), 12 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states 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 19:23:21,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states 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 19:23:21,731 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states 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 19:23:21,731 INFO L175 Difference]: Start difference. First operand has 71 places, 132 transitions, 1490 flow. Second operand 12 states and 1241 transitions. [2023-08-30 19:23:21,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 432 transitions, 5461 flow [2023-08-30 19:23:21,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 432 transitions, 5298 flow, removed 69 selfloop flow, removed 3 redundant places. [2023-08-30 19:23:21,768 INFO L231 Difference]: Finished difference. Result has 87 places, 217 transitions, 3056 flow [2023-08-30 19:23:21,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3056, PETRI_PLACES=87, PETRI_TRANSITIONS=217} [2023-08-30 19:23:21,770 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 68 predicate places. [2023-08-30 19:23:21,771 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 217 transitions, 3056 flow [2023-08-30 19:23:21,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.8) internal successors, (988), 10 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 19:23:21,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:21,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:21,783 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 19:23:21,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:21,978 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 19:23:21,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1605359529, now seen corresponding path program 2 times [2023-08-30 19:23:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:21,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978094967] [2023-08-30 19:23:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:21,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:22,500 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 19:23:22,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:22,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978094967] [2023-08-30 19:23:22,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978094967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:22,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650308749] [2023-08-30 19:23:22,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:23:22,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:22,504 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 19:23:22,505 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 19:23:22,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:23:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:23:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:25,601 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 19:23:25,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:23:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650308749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:28,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:28,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-08-30 19:23:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944760008] [2023-08-30 19:23:28,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:28,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:23:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:23:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:23:29,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:23:29,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 217 transitions, 3056 flow. Second operand has 17 states, 17 states have (on average 93.47058823529412) internal successors, (1589), 17 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 19:23:29,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:29,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:23:29,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:34,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:34,525 INFO L130 PetriNetUnfolder]: 2497/4190 cut-off events. [2023-08-30 19:23:34,525 INFO L131 PetriNetUnfolder]: For 38200/38200 co-relation queries the response was YES. [2023-08-30 19:23:34,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27532 conditions, 4190 events. 2497/4190 cut-off events. For 38200/38200 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25238 event pairs, 196 based on Foata normal form. 12/4202 useless extension candidates. Maximal degree in co-relation 24298. Up to 3160 conditions per place. [2023-08-30 19:23:34,566 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 330 selfloop transitions, 86 changer transitions 25/441 dead transitions. [2023-08-30 19:23:34,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 441 transitions, 6700 flow [2023-08-30 19:23:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:23:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:23:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1695 transitions. [2023-08-30 19:23:34,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44511554621848737 [2023-08-30 19:23:34,571 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1695 transitions. [2023-08-30 19:23:34,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1695 transitions. [2023-08-30 19:23:34,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:34,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1695 transitions. [2023-08-30 19:23:34,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.70588235294117) internal successors, (1695), 17 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states 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 19:23:34,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states 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 19:23:34,581 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states 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 19:23:34,581 INFO L175 Difference]: Start difference. First operand has 87 places, 217 transitions, 3056 flow. Second operand 17 states and 1695 transitions. [2023-08-30 19:23:34,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 441 transitions, 6700 flow [2023-08-30 19:23:34,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 441 transitions, 6019 flow, removed 336 selfloop flow, removed 1 redundant places. [2023-08-30 19:23:34,681 INFO L231 Difference]: Finished difference. Result has 109 places, 277 transitions, 4044 flow [2023-08-30 19:23:34,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4044, PETRI_PLACES=109, PETRI_TRANSITIONS=277} [2023-08-30 19:23:34,683 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 90 predicate places. [2023-08-30 19:23:34,683 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 277 transitions, 4044 flow [2023-08-30 19:23:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 93.47058823529412) internal successors, (1589), 17 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 19:23:34,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:34,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:34,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 19:23:34,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:34,891 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 19:23:34,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash -834738333, now seen corresponding path program 3 times [2023-08-30 19:23:34,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:34,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412399362] [2023-08-30 19:23:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:35,228 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 19:23:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412399362] [2023-08-30 19:23:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412399362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074836273] [2023-08-30 19:23:35,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:23:35,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:35,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:35,240 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 19:23:35,309 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 19:23:35,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:23:35,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 19:23:35,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:37,129 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 19:23:37,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:23:37,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074836273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:37,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:37,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 13 [2023-08-30 19:23:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902153494] [2023-08-30 19:23:37,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 19:23:37,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 19:23:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:23:39,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:39,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-08-30 19:23:39,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 277 transitions, 4044 flow. Second operand has 15 states, 15 states have (on average 95.53333333333333) internal successors, (1433), 15 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states 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 19:23:39,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:39,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-08-30 19:23:39,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:42,752 INFO L130 PetriNetUnfolder]: 2896/4900 cut-off events. [2023-08-30 19:23:42,753 INFO L131 PetriNetUnfolder]: For 54216/54216 co-relation queries the response was YES. [2023-08-30 19:23:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 4900 events. 2896/4900 cut-off events. For 54216/54216 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30934 event pairs, 210 based on Foata normal form. 27/4927 useless extension candidates. Maximal degree in co-relation 32097. Up to 3748 conditions per place. [2023-08-30 19:23:42,790 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 344 selfloop transitions, 135 changer transitions 18/497 dead transitions. [2023-08-30 19:23:42,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 497 transitions, 7814 flow [2023-08-30 19:23:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:23:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:23:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2126 transitions. [2023-08-30 19:23:42,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45195578231292516 [2023-08-30 19:23:42,806 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2126 transitions. [2023-08-30 19:23:42,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2126 transitions. [2023-08-30 19:23:42,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:42,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2126 transitions. [2023-08-30 19:23:42,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.23809523809524) internal successors, (2126), 21 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states 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 19:23:42,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states 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 19:23:42,819 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states 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 19:23:42,820 INFO L175 Difference]: Start difference. First operand has 109 places, 277 transitions, 4044 flow. Second operand 21 states and 2126 transitions. [2023-08-30 19:23:42,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 497 transitions, 7814 flow [2023-08-30 19:23:42,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 497 transitions, 7220 flow, removed 287 selfloop flow, removed 7 redundant places. [2023-08-30 19:23:42,968 INFO L231 Difference]: Finished difference. Result has 132 places, 369 transitions, 5951 flow [2023-08-30 19:23:42,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5951, PETRI_PLACES=132, PETRI_TRANSITIONS=369} [2023-08-30 19:23:42,970 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2023-08-30 19:23:42,970 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 369 transitions, 5951 flow [2023-08-30 19:23:42,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 95.53333333333333) internal successors, (1433), 15 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states 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 19:23:42,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:42,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:42,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 19:23:43,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:43,177 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 19:23:43,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash -922612837, now seen corresponding path program 4 times [2023-08-30 19:23:43,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:43,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365430940] [2023-08-30 19:23:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:43,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:43,276 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 19:23:43,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365430940] [2023-08-30 19:23:43,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365430940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006471927] [2023-08-30 19:23:43,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:23:43,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:43,278 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 19:23:43,281 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 19:23:43,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:23:43,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:23:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:43,427 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 19:23:43,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:23:43,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006471927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:43,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:43,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-30 19:23:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698194989] [2023-08-30 19:23:43,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:43,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:23:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:23:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:23:43,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:23:43,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 369 transitions, 5951 flow. Second operand has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states 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 19:23:43,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:43,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:23:43,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:44,776 INFO L130 PetriNetUnfolder]: 3271/5800 cut-off events. [2023-08-30 19:23:44,776 INFO L131 PetriNetUnfolder]: For 71785/71785 co-relation queries the response was YES. [2023-08-30 19:23:44,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 5800 events. 3271/5800 cut-off events. For 71785/71785 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40295 event pairs, 296 based on Foata normal form. 40/5840 useless extension candidates. Maximal degree in co-relation 37952. Up to 2273 conditions per place. [2023-08-30 19:23:44,815 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 339 selfloop transitions, 316 changer transitions 6/661 dead transitions. [2023-08-30 19:23:44,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 661 transitions, 11513 flow [2023-08-30 19:23:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:23:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:23:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1437 transitions. [2023-08-30 19:23:44,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45822704081632654 [2023-08-30 19:23:44,819 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1437 transitions. [2023-08-30 19:23:44,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1437 transitions. [2023-08-30 19:23:44,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:44,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1437 transitions. [2023-08-30 19:23:44,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.64285714285714) internal successors, (1437), 14 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states 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 19:23:44,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 19:23:44,828 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 19:23:44,828 INFO L175 Difference]: Start difference. First operand has 132 places, 369 transitions, 5951 flow. Second operand 14 states and 1437 transitions. [2023-08-30 19:23:44,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 661 transitions, 11513 flow [2023-08-30 19:23:45,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 661 transitions, 10434 flow, removed 527 selfloop flow, removed 7 redundant places. [2023-08-30 19:23:45,144 INFO L231 Difference]: Finished difference. Result has 146 places, 467 transitions, 8053 flow [2023-08-30 19:23:45,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8053, PETRI_PLACES=146, PETRI_TRANSITIONS=467} [2023-08-30 19:23:45,146 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 127 predicate places. [2023-08-30 19:23:45,146 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 467 transitions, 8053 flow [2023-08-30 19:23:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states 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 19:23:45,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:23:45,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:23:45,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 19:23:45,355 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,SelfDestructingSolverStorable10 [2023-08-30 19:23:45,356 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 19:23:45,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:23:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1944370241, now seen corresponding path program 5 times [2023-08-30 19:23:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:23:45,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42380629] [2023-08-30 19:23:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:23:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:23:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:23:45,663 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 19:23:45,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:23:45,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42380629] [2023-08-30 19:23:45,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42380629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:23:45,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360127795] [2023-08-30 19:23:45,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:23:45,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:23:45,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:23:45,664 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 19:23:45,666 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 19:23:45,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:23:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:23:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:23:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:23:46,199 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 19:23:46,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:23:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:23:46,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360127795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:23:46,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:23:46,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-30 19:23:46,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565162279] [2023-08-30 19:23:46,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:23:46,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:23:46,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:23:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:23:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:23:49,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:23:50,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 224 [2023-08-30 19:23:50,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 467 transitions, 8053 flow. Second operand has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:50,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:23:50,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 224 [2023-08-30 19:23:50,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:58,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:24:00,963 INFO L130 PetriNetUnfolder]: 4345/7642 cut-off events. [2023-08-30 19:24:00,963 INFO L131 PetriNetUnfolder]: For 112133/112133 co-relation queries the response was YES. [2023-08-30 19:24:00,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57273 conditions, 7642 events. 4345/7642 cut-off events. For 112133/112133 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55220 event pairs, 238 based on Foata normal form. 19/7661 useless extension candidates. Maximal degree in co-relation 54841. Up to 3059 conditions per place. [2023-08-30 19:24:01,019 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 353 selfloop transitions, 565 changer transitions 21/939 dead transitions. [2023-08-30 19:24:01,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 939 transitions, 17802 flow [2023-08-30 19:24:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 19:24:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 19:24:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3434 transitions. [2023-08-30 19:24:01,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2023-08-30 19:24:01,025 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3434 transitions. [2023-08-30 19:24:01,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3434 transitions. [2023-08-30 19:24:01,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:01,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3434 transitions. [2023-08-30 19:24:01,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 101.0) internal successors, (3434), 34 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states 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 19:24:01,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states 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 19:24:01,041 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states 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 19:24:01,041 INFO L175 Difference]: Start difference. First operand has 146 places, 467 transitions, 8053 flow. Second operand 34 states and 3434 transitions. [2023-08-30 19:24:01,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 939 transitions, 17802 flow [2023-08-30 19:24:01,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 939 transitions, 16869 flow, removed 454 selfloop flow, removed 3 redundant places. [2023-08-30 19:24:01,531 INFO L231 Difference]: Finished difference. Result has 188 places, 753 transitions, 15432 flow [2023-08-30 19:24:01,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=7632, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15432, PETRI_PLACES=188, PETRI_TRANSITIONS=753} [2023-08-30 19:24:01,532 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 169 predicate places. [2023-08-30 19:24:01,532 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 753 transitions, 15432 flow [2023-08-30 19:24:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states 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 19:24:01,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:01,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:01,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 19:24:01,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:01,739 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 19:24:01,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -620121257, now seen corresponding path program 6 times [2023-08-30 19:24:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:01,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599785181] [2023-08-30 19:24:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:01,861 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 19:24:01,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:01,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599785181] [2023-08-30 19:24:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599785181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:01,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216865765] [2023-08-30 19:24:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:24:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:01,865 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 19:24:01,892 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 19:24:01,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:24:01,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:24:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:02,056 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 19:24:02,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:02,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216865765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:02,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:02,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-30 19:24:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401883862] [2023-08-30 19:24:02,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:02,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:24:02,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:24:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:24:02,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:24:02,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 753 transitions, 15432 flow. Second operand has 10 states, 10 states have (on average 98.9) internal successors, (989), 10 states have internal predecessors, (989), 0 states have call successors, (0), 0 states 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 19:24:02,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:02,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:24:02,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:04,499 INFO L130 PetriNetUnfolder]: 5225/9187 cut-off events. [2023-08-30 19:24:04,499 INFO L131 PetriNetUnfolder]: For 149556/149556 co-relation queries the response was YES. [2023-08-30 19:24:04,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72583 conditions, 9187 events. 5225/9187 cut-off events. For 149556/149556 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 68369 event pairs, 424 based on Foata normal form. 174/9361 useless extension candidates. Maximal degree in co-relation 70289. Up to 3335 conditions per place. [2023-08-30 19:24:04,567 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 574 selfloop transitions, 625 changer transitions 0/1199 dead transitions. [2023-08-30 19:24:04,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1199 transitions, 25589 flow [2023-08-30 19:24:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:24:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:24:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1440 transitions. [2023-08-30 19:24:04,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2023-08-30 19:24:04,570 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1440 transitions. [2023-08-30 19:24:04,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1440 transitions. [2023-08-30 19:24:04,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:04,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1440 transitions. [2023-08-30 19:24:04,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.85714285714286) internal successors, (1440), 14 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 19:24:04,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 19:24:04,577 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 19:24:04,577 INFO L175 Difference]: Start difference. First operand has 188 places, 753 transitions, 15432 flow. Second operand 14 states and 1440 transitions. [2023-08-30 19:24:04,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1199 transitions, 25589 flow [2023-08-30 19:24:05,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1199 transitions, 22613 flow, removed 1469 selfloop flow, removed 7 redundant places. [2023-08-30 19:24:05,701 INFO L231 Difference]: Finished difference. Result has 202 places, 948 transitions, 19816 flow [2023-08-30 19:24:05,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=13331, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19816, PETRI_PLACES=202, PETRI_TRANSITIONS=948} [2023-08-30 19:24:05,702 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 183 predicate places. [2023-08-30 19:24:05,702 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 948 transitions, 19816 flow [2023-08-30 19:24:05,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.9) internal successors, (989), 10 states have internal predecessors, (989), 0 states have call successors, (0), 0 states 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 19:24:05,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:05,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:05,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:05,903 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,SelfDestructingSolverStorable12 [2023-08-30 19:24:05,904 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 19:24:05,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1394518185, now seen corresponding path program 7 times [2023-08-30 19:24:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812559104] [2023-08-30 19:24:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:05,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:05,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812559104] [2023-08-30 19:24:05,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812559104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:05,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404428180] [2023-08-30 19:24:05,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:24:05,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:05,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:05,994 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 19:24:05,997 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 19:24:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:24:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:06,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:24:06,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404428180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:06,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:06,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-30 19:24:06,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913373606] [2023-08-30 19:24:06,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:06,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:24:06,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:06,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:24:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:24:06,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:24:06,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 948 transitions, 19816 flow. Second operand has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 0 states 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 19:24:06,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:06,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:24:06,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:09,077 INFO L130 PetriNetUnfolder]: 5565/9746 cut-off events. [2023-08-30 19:24:09,078 INFO L131 PetriNetUnfolder]: For 182839/182839 co-relation queries the response was YES. [2023-08-30 19:24:09,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81471 conditions, 9746 events. 5565/9746 cut-off events. For 182839/182839 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 73520 event pairs, 108 based on Foata normal form. 100/9846 useless extension candidates. Maximal degree in co-relation 79428. Up to 3519 conditions per place. [2023-08-30 19:24:09,162 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 977 selfloop transitions, 485 changer transitions 0/1462 dead transitions. [2023-08-30 19:24:09,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1462 transitions, 29781 flow [2023-08-30 19:24:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:24:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:24:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1536 transitions. [2023-08-30 19:24:09,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-08-30 19:24:09,166 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1536 transitions. [2023-08-30 19:24:09,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1536 transitions. [2023-08-30 19:24:09,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:09,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1536 transitions. [2023-08-30 19:24:09,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.4) internal successors, (1536), 15 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states 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 19:24:09,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 19:24:09,172 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 19:24:09,172 INFO L175 Difference]: Start difference. First operand has 202 places, 948 transitions, 19816 flow. Second operand 15 states and 1536 transitions. [2023-08-30 19:24:09,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1462 transitions, 29781 flow [2023-08-30 19:24:10,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1462 transitions, 29286 flow, removed 197 selfloop flow, removed 4 redundant places. [2023-08-30 19:24:10,673 INFO L231 Difference]: Finished difference. Result has 216 places, 1043 transitions, 22932 flow [2023-08-30 19:24:10,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=19031, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22932, PETRI_PLACES=216, PETRI_TRANSITIONS=1043} [2023-08-30 19:24:10,674 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 197 predicate places. [2023-08-30 19:24:10,675 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 1043 transitions, 22932 flow [2023-08-30 19:24:10,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 0 states 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 19:24:10,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:10,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:10,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 19:24:10,881 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,SelfDestructingSolverStorable13 [2023-08-30 19:24:10,881 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 19:24:10,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash -231131307, now seen corresponding path program 8 times [2023-08-30 19:24:10,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:10,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863266421] [2023-08-30 19:24:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:10,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:11,226 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 19:24:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863266421] [2023-08-30 19:24:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863266421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781963119] [2023-08-30 19:24:11,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:24:11,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:11,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:11,229 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 19:24:11,234 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 19:24:11,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:24:11,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:24:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:11,759 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 19:24:11,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781963119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:12,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:12,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-30 19:24:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423249289] [2023-08-30 19:24:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:12,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:24:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:24:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:24:12,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 224 [2023-08-30 19:24:12,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1043 transitions, 22932 flow. Second operand has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states 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 19:24:12,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:12,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 224 [2023-08-30 19:24:12,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:21,259 INFO L130 PetriNetUnfolder]: 8047/14085 cut-off events. [2023-08-30 19:24:21,260 INFO L131 PetriNetUnfolder]: For 326478/326478 co-relation queries the response was YES. [2023-08-30 19:24:21,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128774 conditions, 14085 events. 8047/14085 cut-off events. For 326478/326478 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 111551 event pairs, 521 based on Foata normal form. 40/14125 useless extension candidates. Maximal degree in co-relation 125806. Up to 5312 conditions per place. [2023-08-30 19:24:21,403 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 700 selfloop transitions, 1174 changer transitions 37/1911 dead transitions. [2023-08-30 19:24:21,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1911 transitions, 47117 flow [2023-08-30 19:24:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 19:24:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 19:24:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4041 transitions. [2023-08-30 19:24:21,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4510044642857143 [2023-08-30 19:24:21,410 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4041 transitions. [2023-08-30 19:24:21,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4041 transitions. [2023-08-30 19:24:21,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:21,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4041 transitions. [2023-08-30 19:24:21,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 101.025) internal successors, (4041), 40 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states 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 19:24:21,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states 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 19:24:21,427 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states 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 19:24:21,428 INFO L175 Difference]: Start difference. First operand has 216 places, 1043 transitions, 22932 flow. Second operand 40 states and 4041 transitions. [2023-08-30 19:24:21,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1911 transitions, 47117 flow [2023-08-30 19:24:24,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1911 transitions, 45876 flow, removed 616 selfloop flow, removed 1 redundant places. [2023-08-30 19:24:24,406 INFO L231 Difference]: Finished difference. Result has 267 places, 1629 transitions, 42950 flow [2023-08-30 19:24:24,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=22561, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=42950, PETRI_PLACES=267, PETRI_TRANSITIONS=1629} [2023-08-30 19:24:24,408 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 248 predicate places. [2023-08-30 19:24:24,408 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1629 transitions, 42950 flow [2023-08-30 19:24:24,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states 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 19:24:24,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:24,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:24,421 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 19:24:24,621 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,SelfDestructingSolverStorable14 [2023-08-30 19:24:24,622 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 19:24:24,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1040135160, now seen corresponding path program 9 times [2023-08-30 19:24:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:24,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709922149] [2023-08-30 19:24:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:24:24,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:24,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709922149] [2023-08-30 19:24:24,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709922149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:24,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352965109] [2023-08-30 19:24:24,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:24:24,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:24,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:24,741 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 19:24:24,765 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 19:24:24,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:24:24,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:24,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:24:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:24:24,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:24:25,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352965109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:25,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:25,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-30 19:24:25,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184958412] [2023-08-30 19:24:25,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:25,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:24:25,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:25,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:24:25,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:24:25,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:24:25,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1629 transitions, 42950 flow. Second operand has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 19:24:25,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:25,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:24:25,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:31,466 INFO L130 PetriNetUnfolder]: 8442/14653 cut-off events. [2023-08-30 19:24:31,466 INFO L131 PetriNetUnfolder]: For 399821/399821 co-relation queries the response was YES. [2023-08-30 19:24:31,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143821 conditions, 14653 events. 8442/14653 cut-off events. For 399821/399821 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 115025 event pairs, 788 based on Foata normal form. 634/15287 useless extension candidates. Maximal degree in co-relation 141070. Up to 12266 conditions per place. [2023-08-30 19:24:31,601 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1635 selfloop transitions, 303 changer transitions 0/1938 dead transitions. [2023-08-30 19:24:31,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1938 transitions, 53143 flow [2023-08-30 19:24:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:24:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:24:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1350 transitions. [2023-08-30 19:24:31,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635989010989011 [2023-08-30 19:24:31,603 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1350 transitions. [2023-08-30 19:24:31,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1350 transitions. [2023-08-30 19:24:31,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:31,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1350 transitions. [2023-08-30 19:24:31,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 103.84615384615384) internal successors, (1350), 13 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states 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 19:24:31,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 19:24:31,607 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states 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 19:24:31,607 INFO L175 Difference]: Start difference. First operand has 267 places, 1629 transitions, 42950 flow. Second operand 13 states and 1350 transitions. [2023-08-30 19:24:31,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1938 transitions, 53143 flow [2023-08-30 19:24:36,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1938 transitions, 48203 flow, removed 2459 selfloop flow, removed 4 redundant places. [2023-08-30 19:24:36,115 INFO L231 Difference]: Finished difference. Result has 281 places, 1785 transitions, 43291 flow [2023-08-30 19:24:36,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37157, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=43291, PETRI_PLACES=281, PETRI_TRANSITIONS=1785} [2023-08-30 19:24:36,116 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 262 predicate places. [2023-08-30 19:24:36,116 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1785 transitions, 43291 flow [2023-08-30 19:24:36,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 19:24:36,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:36,117 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:36,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:36,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 19:24:36,317 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 19:24:36,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1915724884, now seen corresponding path program 10 times [2023-08-30 19:24:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:36,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308451653] [2023-08-30 19:24:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:36,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:24:36,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308451653] [2023-08-30 19:24:36,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308451653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:36,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856861179] [2023-08-30 19:24:36,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:24:36,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:36,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:36,373 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 19:24:36,384 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 19:24:36,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:24:36,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:36,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 19:24:36,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:24:36,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:24:36,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856861179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:36,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:36,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 19:24:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499704141] [2023-08-30 19:24:36,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:36,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:24:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:24:36,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:24:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-08-30 19:24:36,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1785 transitions, 43291 flow. Second operand has 8 states, 8 states have (on average 102.875) internal successors, (823), 8 states have internal predecessors, (823), 0 states have call successors, (0), 0 states 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 19:24:36,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:36,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-08-30 19:24:36,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:40,960 INFO L130 PetriNetUnfolder]: 5394/9414 cut-off events. [2023-08-30 19:24:40,960 INFO L131 PetriNetUnfolder]: For 261369/261369 co-relation queries the response was YES. [2023-08-30 19:24:41,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87297 conditions, 9414 events. 5394/9414 cut-off events. For 261369/261369 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 69416 event pairs, 392 based on Foata normal form. 578/9992 useless extension candidates. Maximal degree in co-relation 86898. Up to 5483 conditions per place. [2023-08-30 19:24:41,048 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 1028 selfloop transitions, 306 changer transitions 0/1334 dead transitions. [2023-08-30 19:24:41,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1334 transitions, 34192 flow [2023-08-30 19:24:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:24:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:24:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2023-08-30 19:24:41,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830357142857143 [2023-08-30 19:24:41,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2023-08-30 19:24:41,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2023-08-30 19:24:41,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:41,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2023-08-30 19:24:41,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 19:24:41,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:24:41,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 19:24:41,051 INFO L175 Difference]: Start difference. First operand has 281 places, 1785 transitions, 43291 flow. Second operand 5 states and 541 transitions. [2023-08-30 19:24:41,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1334 transitions, 34192 flow [2023-08-30 19:24:43,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1334 transitions, 31457 flow, removed 729 selfloop flow, removed 15 redundant places. [2023-08-30 19:24:43,440 INFO L231 Difference]: Finished difference. Result has 271 places, 1195 transitions, 27062 flow [2023-08-30 19:24:43,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24503, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=27062, PETRI_PLACES=271, PETRI_TRANSITIONS=1195} [2023-08-30 19:24:43,442 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 252 predicate places. [2023-08-30 19:24:43,442 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 1195 transitions, 27062 flow [2023-08-30 19:24:43,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.875) internal successors, (823), 8 states have internal predecessors, (823), 0 states have call successors, (0), 0 states 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 19:24:43,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:43,442 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:43,448 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 19:24:43,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:43,643 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 19:24:43,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash 793995680, now seen corresponding path program 11 times [2023-08-30 19:24:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:43,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227141096] [2023-08-30 19:24:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:24:43,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:43,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227141096] [2023-08-30 19:24:43,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227141096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:43,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507406750] [2023-08-30 19:24:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:24:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:43,741 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 19:24:43,767 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 19:24:43,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 19:24:43,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:24:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:24:43,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:24:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507406750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:43,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-30 19:24:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298712835] [2023-08-30 19:24:43,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:43,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:24:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:24:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:24:43,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:24:43,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 1195 transitions, 27062 flow. Second operand has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 0 states 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 19:24:43,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:43,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:24:43,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:47,559 INFO L130 PetriNetUnfolder]: 5514/9733 cut-off events. [2023-08-30 19:24:47,559 INFO L131 PetriNetUnfolder]: For 240336/240336 co-relation queries the response was YES. [2023-08-30 19:24:47,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88938 conditions, 9733 events. 5514/9733 cut-off events. For 240336/240336 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 73126 event pairs, 256 based on Foata normal form. 14/9747 useless extension candidates. Maximal degree in co-relation 88596. Up to 6525 conditions per place. [2023-08-30 19:24:47,649 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1177 selfloop transitions, 154 changer transitions 21/1352 dead transitions. [2023-08-30 19:24:47,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1352 transitions, 32334 flow [2023-08-30 19:24:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:24:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:24:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1531 transitions. [2023-08-30 19:24:47,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556547619047619 [2023-08-30 19:24:47,652 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1531 transitions. [2023-08-30 19:24:47,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1531 transitions. [2023-08-30 19:24:47,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:47,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1531 transitions. [2023-08-30 19:24:47,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.06666666666666) internal successors, (1531), 15 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states 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 19:24:47,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 19:24:47,657 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 19:24:47,657 INFO L175 Difference]: Start difference. First operand has 271 places, 1195 transitions, 27062 flow. Second operand 15 states and 1531 transitions. [2023-08-30 19:24:47,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1352 transitions, 32334 flow [2023-08-30 19:24:49,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1352 transitions, 32067 flow, removed 130 selfloop flow, removed 2 redundant places. [2023-08-30 19:24:49,898 INFO L231 Difference]: Finished difference. Result has 287 places, 1243 transitions, 28234 flow [2023-08-30 19:24:49,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26354, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28234, PETRI_PLACES=287, PETRI_TRANSITIONS=1243} [2023-08-30 19:24:49,899 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 268 predicate places. [2023-08-30 19:24:49,900 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 1243 transitions, 28234 flow [2023-08-30 19:24:49,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 0 states 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 19:24:49,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:49,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:49,910 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 19:24:50,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 19:24:50,108 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 19:24:50,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash -965795692, now seen corresponding path program 12 times [2023-08-30 19:24:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:50,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966064706] [2023-08-30 19:24:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:50,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:24:50,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:50,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966064706] [2023-08-30 19:24:50,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966064706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:50,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172121935] [2023-08-30 19:24:50,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:24:50,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:50,312 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 19:24:50,335 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 19:24:50,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:24:50,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:24:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:24:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:24:50,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:24:50,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172121935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:50,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:50,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-30 19:24:50,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614743016] [2023-08-30 19:24:50,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:50,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:24:50,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:24:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:24:50,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:24:50,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1243 transitions, 28234 flow. Second operand has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 0 states 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 19:24:50,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:50,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:24:50,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:24:54,616 INFO L130 PetriNetUnfolder]: 6399/11444 cut-off events. [2023-08-30 19:24:54,616 INFO L131 PetriNetUnfolder]: For 326691/326691 co-relation queries the response was YES. [2023-08-30 19:24:54,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106616 conditions, 11444 events. 6399/11444 cut-off events. For 326691/326691 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 89124 event pairs, 242 based on Foata normal form. 212/11656 useless extension candidates. Maximal degree in co-relation 105576. Up to 4631 conditions per place. [2023-08-30 19:24:54,709 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1099 selfloop transitions, 462 changer transitions 121/1682 dead transitions. [2023-08-30 19:24:54,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1682 transitions, 39344 flow [2023-08-30 19:24:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:24:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:24:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1228 transitions. [2023-08-30 19:24:54,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568452380952381 [2023-08-30 19:24:54,711 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1228 transitions. [2023-08-30 19:24:54,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1228 transitions. [2023-08-30 19:24:54,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:24:54,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1228 transitions. [2023-08-30 19:24:54,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.33333333333333) internal successors, (1228), 12 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states 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 19:24:54,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states 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 19:24:54,715 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states 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 19:24:54,715 INFO L175 Difference]: Start difference. First operand has 287 places, 1243 transitions, 28234 flow. Second operand 12 states and 1228 transitions. [2023-08-30 19:24:54,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1682 transitions, 39344 flow [2023-08-30 19:24:57,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1682 transitions, 38745 flow, removed 293 selfloop flow, removed 2 redundant places. [2023-08-30 19:24:57,650 INFO L231 Difference]: Finished difference. Result has 302 places, 1297 transitions, 30938 flow [2023-08-30 19:24:57,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26055, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=30938, PETRI_PLACES=302, PETRI_TRANSITIONS=1297} [2023-08-30 19:24:57,651 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 283 predicate places. [2023-08-30 19:24:57,652 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 1297 transitions, 30938 flow [2023-08-30 19:24:57,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 0 states 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 19:24:57,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:24:57,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:24:57,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 19:24:57,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:57,858 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 19:24:57,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:24:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash 92124486, now seen corresponding path program 13 times [2023-08-30 19:24:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:24:57,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121959566] [2023-08-30 19:24:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:24:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:24:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:57,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:24:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121959566] [2023-08-30 19:24:57,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121959566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:24:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059622214] [2023-08-30 19:24:57,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:24:57,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:24:57,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:24:57,957 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 19:24:57,981 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 19:24:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:24:58,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:24:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:24:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:24:58,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:24:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:24:58,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059622214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:24:58,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:24:58,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-30 19:24:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239412365] [2023-08-30 19:24:58,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:24:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:24:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:24:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:24:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:24:58,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:24:58,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1297 transitions, 30938 flow. Second operand has 9 states, 9 states have (on average 99.44444444444444) internal successors, (895), 9 states have internal predecessors, (895), 0 states have call successors, (0), 0 states 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 19:24:58,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:24:58,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:24:58,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:02,723 INFO L130 PetriNetUnfolder]: 6081/10853 cut-off events. [2023-08-30 19:25:02,723 INFO L131 PetriNetUnfolder]: For 370313/370313 co-relation queries the response was YES. [2023-08-30 19:25:02,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106692 conditions, 10853 events. 6081/10853 cut-off events. For 370313/370313 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83047 event pairs, 466 based on Foata normal form. 366/11219 useless extension candidates. Maximal degree in co-relation 105441. Up to 6459 conditions per place. [2023-08-30 19:25:02,824 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 999 selfloop transitions, 540 changer transitions 2/1541 dead transitions. [2023-08-30 19:25:02,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1541 transitions, 38699 flow [2023-08-30 19:25:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:25:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:25:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1133 transitions. [2023-08-30 19:25:02,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2023-08-30 19:25:02,826 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1133 transitions. [2023-08-30 19:25:02,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1133 transitions. [2023-08-30 19:25:02,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:02,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1133 transitions. [2023-08-30 19:25:02,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 103.0) internal successors, (1133), 11 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states 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 19:25:02,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states 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 19:25:02,829 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states 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 19:25:02,829 INFO L175 Difference]: Start difference. First operand has 302 places, 1297 transitions, 30938 flow. Second operand 11 states and 1133 transitions. [2023-08-30 19:25:02,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1541 transitions, 38699 flow [2023-08-30 19:25:06,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1541 transitions, 36645 flow, removed 992 selfloop flow, removed 7 redundant places. [2023-08-30 19:25:06,201 INFO L231 Difference]: Finished difference. Result has 307 places, 1357 transitions, 32575 flow [2023-08-30 19:25:06,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=28898, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32575, PETRI_PLACES=307, PETRI_TRANSITIONS=1357} [2023-08-30 19:25:06,202 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 288 predicate places. [2023-08-30 19:25:06,202 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 1357 transitions, 32575 flow [2023-08-30 19:25:06,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.44444444444444) internal successors, (895), 9 states have internal predecessors, (895), 0 states have call successors, (0), 0 states 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 19:25:06,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:06,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:06,207 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 19:25:06,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:06,403 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 19:25:06,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash -675962772, now seen corresponding path program 14 times [2023-08-30 19:25:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:06,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102311961] [2023-08-30 19:25:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:25:06,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:06,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102311961] [2023-08-30 19:25:06,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102311961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:25:06,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:25:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:25:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024899639] [2023-08-30 19:25:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:25:06,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:25:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:25:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:25:06,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-08-30 19:25:06,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 1357 transitions, 32575 flow. Second operand has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 19:25:06,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:06,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-08-30 19:25:06,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:10,195 INFO L130 PetriNetUnfolder]: 4822/8940 cut-off events. [2023-08-30 19:25:10,195 INFO L131 PetriNetUnfolder]: For 280364/280364 co-relation queries the response was YES. [2023-08-30 19:25:10,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87238 conditions, 8940 events. 4822/8940 cut-off events. For 280364/280364 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 68547 event pairs, 1144 based on Foata normal form. 402/9342 useless extension candidates. Maximal degree in co-relation 85433. Up to 4972 conditions per place. [2023-08-30 19:25:10,270 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 878 selfloop transitions, 235 changer transitions 220/1333 dead transitions. [2023-08-30 19:25:10,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1333 transitions, 35595 flow [2023-08-30 19:25:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:25:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:25:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 433 transitions. [2023-08-30 19:25:10,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48325892857142855 [2023-08-30 19:25:10,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 433 transitions. [2023-08-30 19:25:10,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 433 transitions. [2023-08-30 19:25:10,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:10,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 433 transitions. [2023-08-30 19:25:10,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 19:25:10,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states 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 19:25:10,273 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states 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 19:25:10,273 INFO L175 Difference]: Start difference. First operand has 307 places, 1357 transitions, 32575 flow. Second operand 4 states and 433 transitions. [2023-08-30 19:25:10,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1333 transitions, 35595 flow [2023-08-30 19:25:12,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1333 transitions, 34669 flow, removed 405 selfloop flow, removed 5 redundant places. [2023-08-30 19:25:12,646 INFO L231 Difference]: Finished difference. Result has 304 places, 1027 transitions, 24701 flow [2023-08-30 19:25:12,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=27862, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=24701, PETRI_PLACES=304, PETRI_TRANSITIONS=1027} [2023-08-30 19:25:12,647 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 285 predicate places. [2023-08-30 19:25:12,647 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1027 transitions, 24701 flow [2023-08-30 19:25:12,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 19:25:12,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:12,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:12,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 19:25:12,648 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 19:25:12,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash -16554560, now seen corresponding path program 4 times [2023-08-30 19:25:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:12,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229295767] [2023-08-30 19:25:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:12,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229295767] [2023-08-30 19:25:12,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229295767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061695703] [2023-08-30 19:25:12,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:25:12,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:12,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:12,769 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 19:25:12,803 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 19:25:12,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:25:12,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:12,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:25:12,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:12,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:25:13,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061695703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:13,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:13,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-30 19:25:13,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320745176] [2023-08-30 19:25:13,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:13,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:25:13,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:25:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:25:13,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:25:13,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1027 transitions, 24701 flow. Second operand has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 19:25:13,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:13,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:25:13,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:17,147 INFO L130 PetriNetUnfolder]: 5467/10063 cut-off events. [2023-08-30 19:25:17,148 INFO L131 PetriNetUnfolder]: For 344825/344825 co-relation queries the response was YES. [2023-08-30 19:25:17,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101410 conditions, 10063 events. 5467/10063 cut-off events. For 344825/344825 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 76325 event pairs, 514 based on Foata normal form. 132/10195 useless extension candidates. Maximal degree in co-relation 99551. Up to 3245 conditions per place. [2023-08-30 19:25:17,245 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 753 selfloop transitions, 839 changer transitions 1/1593 dead transitions. [2023-08-30 19:25:17,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1593 transitions, 40963 flow [2023-08-30 19:25:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 19:25:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 19:25:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2368 transitions. [2023-08-30 19:25:17,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45962732919254656 [2023-08-30 19:25:17,248 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2368 transitions. [2023-08-30 19:25:17,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2368 transitions. [2023-08-30 19:25:17,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:17,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2368 transitions. [2023-08-30 19:25:17,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.95652173913044) internal successors, (2368), 23 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states 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 19:25:17,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 19:25:17,255 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 19:25:17,255 INFO L175 Difference]: Start difference. First operand has 304 places, 1027 transitions, 24701 flow. Second operand 23 states and 2368 transitions. [2023-08-30 19:25:17,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1593 transitions, 40963 flow [2023-08-30 19:25:19,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1593 transitions, 40088 flow, removed 238 selfloop flow, removed 7 redundant places. [2023-08-30 19:25:19,870 INFO L231 Difference]: Finished difference. Result has 329 places, 1331 transitions, 35950 flow [2023-08-30 19:25:19,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24098, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35950, PETRI_PLACES=329, PETRI_TRANSITIONS=1331} [2023-08-30 19:25:19,872 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 310 predicate places. [2023-08-30 19:25:19,872 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1331 transitions, 35950 flow [2023-08-30 19:25:19,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 19:25:19,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:19,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:19,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:20,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:20,073 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 19:25:20,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash -862660922, now seen corresponding path program 5 times [2023-08-30 19:25:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867744005] [2023-08-30 19:25:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:20,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:20,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867744005] [2023-08-30 19:25:20,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867744005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:20,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901352930] [2023-08-30 19:25:20,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:25:20,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:20,181 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 19:25:20,191 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 19:25:20,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:25:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:25:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:20,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:25:20,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901352930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:20,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-30 19:25:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158068276] [2023-08-30 19:25:20,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:25:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:25:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:25:20,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-08-30 19:25:20,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1331 transitions, 35950 flow. Second operand has 12 states, 12 states have (on average 98.83333333333333) internal successors, (1186), 12 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 19:25:20,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:20,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-08-30 19:25:20,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:25,254 INFO L130 PetriNetUnfolder]: 5260/9755 cut-off events. [2023-08-30 19:25:25,254 INFO L131 PetriNetUnfolder]: For 384579/384579 co-relation queries the response was YES. [2023-08-30 19:25:25,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103335 conditions, 9755 events. 5260/9755 cut-off events. For 384579/384579 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 74697 event pairs, 82 based on Foata normal form. 112/9867 useless extension candidates. Maximal degree in co-relation 101432. Up to 2999 conditions per place. [2023-08-30 19:25:25,359 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1024 selfloop transitions, 663 changer transitions 25/1712 dead transitions. [2023-08-30 19:25:25,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1712 transitions, 45857 flow [2023-08-30 19:25:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 19:25:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 19:25:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2453 transitions. [2023-08-30 19:25:25,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562872023809524 [2023-08-30 19:25:25,362 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2453 transitions. [2023-08-30 19:25:25,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2453 transitions. [2023-08-30 19:25:25,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:25,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2453 transitions. [2023-08-30 19:25:25,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.20833333333333) internal successors, (2453), 24 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states 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 19:25:25,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states 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 19:25:25,370 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states 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 19:25:25,370 INFO L175 Difference]: Start difference. First operand has 329 places, 1331 transitions, 35950 flow. Second operand 24 states and 2453 transitions. [2023-08-30 19:25:25,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1712 transitions, 45857 flow [2023-08-30 19:25:28,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1712 transitions, 44847 flow, removed 414 selfloop flow, removed 5 redundant places. [2023-08-30 19:25:28,449 INFO L231 Difference]: Finished difference. Result has 352 places, 1341 transitions, 37421 flow [2023-08-30 19:25:28,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34224, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=37421, PETRI_PLACES=352, PETRI_TRANSITIONS=1341} [2023-08-30 19:25:28,451 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 333 predicate places. [2023-08-30 19:25:28,451 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1341 transitions, 37421 flow [2023-08-30 19:25:28,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.83333333333333) internal successors, (1186), 12 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 19:25:28,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:28,452 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:28,460 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 19:25:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:28,660 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 19:25:28,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 793791252, now seen corresponding path program 15 times [2023-08-30 19:25:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474418795] [2023-08-30 19:25:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:25:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474418795] [2023-08-30 19:25:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474418795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821739106] [2023-08-30 19:25:28,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:25:28,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:28,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:28,741 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 19:25:28,762 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 19:25:28,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 19:25:28,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 19:25:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:25:28,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:25:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821739106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:28,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:28,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 19:25:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063317144] [2023-08-30 19:25:28,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:25:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:25:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:25:29,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-08-30 19:25:29,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1341 transitions, 37421 flow. Second operand has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 19:25:29,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:29,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-08-30 19:25:29,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:35,026 INFO L130 PetriNetUnfolder]: 7296/13519 cut-off events. [2023-08-30 19:25:35,027 INFO L131 PetriNetUnfolder]: For 595615/595615 co-relation queries the response was YES. [2023-08-30 19:25:35,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147344 conditions, 13519 events. 7296/13519 cut-off events. For 595615/595615 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 109735 event pairs, 317 based on Foata normal form. 410/13929 useless extension candidates. Maximal degree in co-relation 145852. Up to 5039 conditions per place. [2023-08-30 19:25:35,188 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 1638 selfloop transitions, 431 changer transitions 24/2093 dead transitions. [2023-08-30 19:25:35,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 2093 transitions, 63873 flow [2023-08-30 19:25:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:25:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:25:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 760 transitions. [2023-08-30 19:25:35,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2023-08-30 19:25:35,190 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 760 transitions. [2023-08-30 19:25:35,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 760 transitions. [2023-08-30 19:25:35,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:35,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 760 transitions. [2023-08-30 19:25:35,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.57142857142857) internal successors, (760), 7 states have internal predecessors, (760), 0 states have call successors, (0), 0 states 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 19:25:35,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states 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 19:25:35,192 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states 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 19:25:35,192 INFO L175 Difference]: Start difference. First operand has 352 places, 1341 transitions, 37421 flow. Second operand 7 states and 760 transitions. [2023-08-30 19:25:35,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 2093 transitions, 63873 flow [2023-08-30 19:25:41,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2093 transitions, 60533 flow, removed 1496 selfloop flow, removed 8 redundant places. [2023-08-30 19:25:41,122 INFO L231 Difference]: Finished difference. Result has 348 places, 1388 transitions, 38612 flow [2023-08-30 19:25:41,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=33052, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38612, PETRI_PLACES=348, PETRI_TRANSITIONS=1388} [2023-08-30 19:25:41,123 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 329 predicate places. [2023-08-30 19:25:41,123 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1388 transitions, 38612 flow [2023-08-30 19:25:41,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 19:25:41,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:41,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:41,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:41,324 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,SelfDestructingSolverStorable23 [2023-08-30 19:25:41,325 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 19:25:41,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1483838864, now seen corresponding path program 16 times [2023-08-30 19:25:41,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:41,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761233954] [2023-08-30 19:25:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:41,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:41,757 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 19:25:41,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:41,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761233954] [2023-08-30 19:25:41,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761233954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:41,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072620765] [2023-08-30 19:25:41,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:25:41,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:41,759 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 19:25:41,767 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 19:25:42,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:25:42,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:25:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:42,515 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 19:25:42,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:42,940 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 19:25:42,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072620765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:42,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:42,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-30 19:25:42,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363592776] [2023-08-30 19:25:42,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:42,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:25:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:25:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:25:44,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:25:44,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1388 transitions, 38612 flow. Second operand has 21 states, 21 states have (on average 93.52380952380952) internal successors, (1964), 21 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states 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 19:25:44,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:44,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:25:44,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:52,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:25:55,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:25:57,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:25:59,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:05,545 INFO L130 PetriNetUnfolder]: 7975/14846 cut-off events. [2023-08-30 19:26:05,546 INFO L131 PetriNetUnfolder]: For 580654/580654 co-relation queries the response was YES. [2023-08-30 19:26:05,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159108 conditions, 14846 events. 7975/14846 cut-off events. For 580654/580654 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 122866 event pairs, 742 based on Foata normal form. 20/14866 useless extension candidates. Maximal degree in co-relation 156918. Up to 13663 conditions per place. [2023-08-30 19:26:05,706 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1502 selfloop transitions, 165 changer transitions 19/1686 dead transitions. [2023-08-30 19:26:05,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1686 transitions, 49709 flow [2023-08-30 19:26:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:26:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:26:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1769 transitions. [2023-08-30 19:26:05,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43874007936507936 [2023-08-30 19:26:05,708 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1769 transitions. [2023-08-30 19:26:05,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1769 transitions. [2023-08-30 19:26:05,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:26:05,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1769 transitions. [2023-08-30 19:26:05,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 98.27777777777777) internal successors, (1769), 18 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states 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 19:26:05,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states 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 19:26:05,714 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states 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 19:26:05,714 INFO L175 Difference]: Start difference. First operand has 348 places, 1388 transitions, 38612 flow. Second operand 18 states and 1769 transitions. [2023-08-30 19:26:05,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1686 transitions, 49709 flow [2023-08-30 19:26:11,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1686 transitions, 48944 flow, removed 153 selfloop flow, removed 4 redundant places. [2023-08-30 19:26:11,167 INFO L231 Difference]: Finished difference. Result has 370 places, 1526 transitions, 42758 flow [2023-08-30 19:26:11,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37965, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42758, PETRI_PLACES=370, PETRI_TRANSITIONS=1526} [2023-08-30 19:26:11,168 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 351 predicate places. [2023-08-30 19:26:11,169 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1526 transitions, 42758 flow [2023-08-30 19:26:11,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.52380952380952) internal successors, (1964), 21 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states 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 19:26:11,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:11,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:11,174 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 19:26:11,369 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,SelfDestructingSolverStorable24 [2023-08-30 19:26:11,370 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 19:26:11,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:11,370 INFO L85 PathProgramCache]: Analyzing trace with hash 351091990, now seen corresponding path program 17 times [2023-08-30 19:26:11,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:11,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894355931] [2023-08-30 19:26:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:11,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894355931] [2023-08-30 19:26:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894355931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:26:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166531010] [2023-08-30 19:26:11,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:26:11,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:26:11,757 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 19:26:11,784 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 19:26:12,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:26:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:26:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:26:12,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:26:12,555 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 19:26:12,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:26:12,948 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 19:26:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166531010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:26:12,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:26:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-30 19:26:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855125443] [2023-08-30 19:26:12,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:26:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:26:12,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:26:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:26:14,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:26:14,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1526 transitions, 42758 flow. Second operand has 21 states, 21 states have (on average 93.47619047619048) internal successors, (1963), 21 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 19:26:14,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:14,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:26:14,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:28,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:30,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:32,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:36,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:37,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:38,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:41,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:26:43,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:26:46,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:48,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:26:53,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:00,207 INFO L130 PetriNetUnfolder]: 8824/16477 cut-off events. [2023-08-30 19:27:00,207 INFO L131 PetriNetUnfolder]: For 664178/664178 co-relation queries the response was YES. [2023-08-30 19:27:00,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179083 conditions, 16477 events. 8824/16477 cut-off events. For 664178/664178 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 138658 event pairs, 848 based on Foata normal form. 26/16503 useless extension candidates. Maximal degree in co-relation 174121. Up to 15009 conditions per place. [2023-08-30 19:27:00,397 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1669 selfloop transitions, 201 changer transitions 32/1902 dead transitions. [2023-08-30 19:27:00,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1902 transitions, 56780 flow [2023-08-30 19:27:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:27:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:27:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2155 transitions. [2023-08-30 19:27:00,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43729707792207795 [2023-08-30 19:27:00,400 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2155 transitions. [2023-08-30 19:27:00,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2155 transitions. [2023-08-30 19:27:00,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:00,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2155 transitions. [2023-08-30 19:27:00,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.95454545454545) internal successors, (2155), 22 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states 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 19:27:00,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states 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 19:27:00,406 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states 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 19:27:00,406 INFO L175 Difference]: Start difference. First operand has 370 places, 1526 transitions, 42758 flow. Second operand 22 states and 2155 transitions. [2023-08-30 19:27:00,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1902 transitions, 56780 flow [2023-08-30 19:27:06,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1902 transitions, 56010 flow, removed 377 selfloop flow, removed 5 redundant places. [2023-08-30 19:27:06,976 INFO L231 Difference]: Finished difference. Result has 395 places, 1700 transitions, 48151 flow [2023-08-30 19:27:06,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=41988, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48151, PETRI_PLACES=395, PETRI_TRANSITIONS=1700} [2023-08-30 19:27:06,978 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 376 predicate places. [2023-08-30 19:27:06,978 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1700 transitions, 48151 flow [2023-08-30 19:27:06,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.47619047619048) internal successors, (1963), 21 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 19:27:06,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:06,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:06,983 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 19:27:07,179 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,SelfDestructingSolverStorable25 [2023-08-30 19:27:07,179 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 19:27:07,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1811320966, now seen corresponding path program 18 times [2023-08-30 19:27:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:07,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132300438] [2023-08-30 19:27:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:07,564 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 19:27:07,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:07,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132300438] [2023-08-30 19:27:07,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132300438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:07,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11832433] [2023-08-30 19:27:07,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:27:07,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:07,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:07,569 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 19:27:07,572 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 19:27:07,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 19:27:07,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:27:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:08,251 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 19:27:08,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:10,530 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-08-30 19:27:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-30 19:27:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11832433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:10,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:10,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-30 19:27:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849265854] [2023-08-30 19:27:10,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:10,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:27:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:27:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-08-30 19:27:10,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-30 19:27:10,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1700 transitions, 48151 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states 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 19:27:10,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:10,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-30 19:27:10,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:13,184 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-30 19:27:16,116 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-30 19:27:19,214 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-30 19:27:26,719 INFO L130 PetriNetUnfolder]: 9273/17371 cut-off events. [2023-08-30 19:27:26,719 INFO L131 PetriNetUnfolder]: For 743960/743960 co-relation queries the response was YES. [2023-08-30 19:27:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192852 conditions, 17371 events. 9273/17371 cut-off events. For 743960/743960 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 148103 event pairs, 895 based on Foata normal form. 11/17382 useless extension candidates. Maximal degree in co-relation 189597. Up to 16419 conditions per place. [2023-08-30 19:27:27,015 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 1790 selfloop transitions, 145 changer transitions 11/1946 dead transitions. [2023-08-30 19:27:27,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1946 transitions, 58802 flow [2023-08-30 19:27:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:27:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:27:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1615 transitions. [2023-08-30 19:27:27,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40054563492063494 [2023-08-30 19:27:27,017 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1615 transitions. [2023-08-30 19:27:27,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1615 transitions. [2023-08-30 19:27:27,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:27,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1615 transitions. [2023-08-30 19:27:27,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 89.72222222222223) internal successors, (1615), 18 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 19:27:27,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states 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 19:27:27,023 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states 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 19:27:27,023 INFO L175 Difference]: Start difference. First operand has 395 places, 1700 transitions, 48151 flow. Second operand 18 states and 1615 transitions. [2023-08-30 19:27:27,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1946 transitions, 58802 flow [2023-08-30 19:27:35,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1946 transitions, 57258 flow, removed 761 selfloop flow, removed 5 redundant places. [2023-08-30 19:27:35,155 INFO L231 Difference]: Finished difference. Result has 417 places, 1813 transitions, 50672 flow [2023-08-30 19:27:35,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=46695, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=50672, PETRI_PLACES=417, PETRI_TRANSITIONS=1813} [2023-08-30 19:27:35,156 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 398 predicate places. [2023-08-30 19:27:35,156 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1813 transitions, 50672 flow [2023-08-30 19:27:35,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states 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 19:27:35,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:35,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:35,163 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 19:27:35,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:35,357 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 19:27:35,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1559351968, now seen corresponding path program 19 times [2023-08-30 19:27:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:35,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126301116] [2023-08-30 19:27:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:35,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:35,731 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 19:27:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126301116] [2023-08-30 19:27:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126301116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708532331] [2023-08-30 19:27:35,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:27:35,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:35,737 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 19:27:35,747 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 19:27:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:27:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:36,586 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 19:27:36,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:27:37,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708532331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:37,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:37,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 19:27:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886119478] [2023-08-30 19:27:37,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:27:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:37,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:27:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:27:39,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:27:39,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1813 transitions, 50672 flow. Second operand has 22 states, 22 states have (on average 93.31818181818181) internal successors, (2053), 22 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states 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 19:27:39,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:39,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:27:39,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:55,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 19:28:06,674 INFO L130 PetriNetUnfolder]: 10806/20314 cut-off events. [2023-08-30 19:28:06,674 INFO L131 PetriNetUnfolder]: For 942763/942763 co-relation queries the response was YES. [2023-08-30 19:28:06,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240890 conditions, 20314 events. 10806/20314 cut-off events. For 942763/942763 co-relation queries the response was YES. Maximal size of possible extension queue 1200. Compared 178015 event pairs, 836 based on Foata normal form. 12/20326 useless extension candidates. Maximal degree in co-relation 236222. Up to 12382 conditions per place. [2023-08-30 19:28:06,937 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1068 selfloop transitions, 1364 changer transitions 22/2454 dead transitions. [2023-08-30 19:28:06,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2454 transitions, 73835 flow [2023-08-30 19:28:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 19:28:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 19:28:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3296 transitions. [2023-08-30 19:28:06,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327731092436975 [2023-08-30 19:28:06,940 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3296 transitions. [2023-08-30 19:28:06,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3296 transitions. [2023-08-30 19:28:06,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:28:06,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3296 transitions. [2023-08-30 19:28:06,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 96.94117647058823) internal successors, (3296), 34 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 19:28:06,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states 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 19:28:06,949 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states 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 19:28:06,949 INFO L175 Difference]: Start difference. First operand has 417 places, 1813 transitions, 50672 flow. Second operand 34 states and 3296 transitions. [2023-08-30 19:28:06,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2454 transitions, 73835 flow [2023-08-30 19:28:18,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 2454 transitions, 73025 flow, removed 394 selfloop flow, removed 6 redundant places. [2023-08-30 19:28:18,109 INFO L231 Difference]: Finished difference. Result has 457 places, 2229 transitions, 69517 flow [2023-08-30 19:28:18,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=49966, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=992, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=69517, PETRI_PLACES=457, PETRI_TRANSITIONS=2229} [2023-08-30 19:28:18,110 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 438 predicate places. [2023-08-30 19:28:18,111 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2229 transitions, 69517 flow [2023-08-30 19:28:18,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.31818181818181) internal successors, (2053), 22 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states 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 19:28:18,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:28:18,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:28:18,119 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 19:28:18,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 19:28:18,317 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 19:28:18,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:28:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1704281468, now seen corresponding path program 20 times [2023-08-30 19:28:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:28:18,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324444328] [2023-08-30 19:28:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:28:18,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:28:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:28:18,684 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 19:28:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:28:18,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324444328] [2023-08-30 19:28:18,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324444328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:28:18,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435916882] [2023-08-30 19:28:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:28:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:28:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:28:18,686 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 19:28:18,689 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 19:28:19,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:28:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:28:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 19:28:19,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:28:19,610 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 19:28:19,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:28:20,064 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 19:28:20,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435916882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:28:20,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:28:20,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-30 19:28:20,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745930273] [2023-08-30 19:28:20,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:28:20,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:28:20,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:28:20,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:28:20,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:28:21,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:28:21,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2229 transitions, 69517 flow. Second operand has 21 states, 21 states have (on average 93.57142857142857) internal successors, (1965), 21 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states 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 19:28:21,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:28:21,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:28:21,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:28:25,317 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~k1~0 1))) (and (<= c_~j1~0 1) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))))) (< (+ c_~j1~0 1) ~m~0))) (or (let ((.cse1 (* c_~m~0 2))) (= (+ c_~k2~0 .cse1 (* (div .cse2 4294967296) 4294967296)) (+ (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) c_~k1~0 1))) (< c_~j1~0 c_~m~0)) (< 0 c_~m~0) (<= .cse2 (+ (* (div (+ (- 1) c_~k1~0) 4294967296) 4294967296) (* (div (+ (- c_~k2~0) 2 (- c_~m~0)) 4294967296) 4294967296) c_~k2~0 c_~m~0)) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0) (+ c_~k2~0 (* 4294967296 (div c_~k1~0 4294967296)))) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-30 19:28:31,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:33,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:35,512 WARN L539 Checker$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 19:28:49,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:53,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:55,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:57,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:00,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:29:01,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:29:04,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:29:06,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:29:08,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:29:10,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 19:29:11,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:29:26,959 INFO L130 PetriNetUnfolder]: 12344/23386 cut-off events. [2023-08-30 19:29:26,960 INFO L131 PetriNetUnfolder]: For 1258066/1258066 co-relation queries the response was YES. [2023-08-30 19:29:27,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294606 conditions, 23386 events. 12344/23386 cut-off events. For 1258066/1258066 co-relation queries the response was YES. Maximal size of possible extension queue 1262. Compared 207642 event pairs, 1210 based on Foata normal form. 28/23414 useless extension candidates. Maximal degree in co-relation 293210. Up to 20403 conditions per place. [2023-08-30 19:29:27,290 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 2374 selfloop transitions, 422 changer transitions 33/2829 dead transitions. [2023-08-30 19:29:27,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2829 transitions, 93902 flow [2023-08-30 19:29:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:29:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:29:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3019 transitions. [2023-08-30 19:29:27,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43476382488479265 [2023-08-30 19:29:27,293 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3019 transitions. [2023-08-30 19:29:27,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3019 transitions. [2023-08-30 19:29:27,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:29:27,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3019 transitions. [2023-08-30 19:29:27,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 97.38709677419355) internal successors, (3019), 31 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states 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 19:29:27,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states 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 19:29:27,299 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states 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 19:29:27,299 INFO L175 Difference]: Start difference. First operand has 457 places, 2229 transitions, 69517 flow. Second operand 31 states and 3019 transitions. [2023-08-30 19:29:27,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2829 transitions, 93902 flow [2023-08-30 19:29:43,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2829 transitions, 90812 flow, removed 1513 selfloop flow, removed 15 redundant places. [2023-08-30 19:29:43,518 INFO L231 Difference]: Finished difference. Result has 486 places, 2570 transitions, 80271 flow [2023-08-30 19:29:43,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=66753, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=80271, PETRI_PLACES=486, PETRI_TRANSITIONS=2570} [2023-08-30 19:29:43,520 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 467 predicate places. [2023-08-30 19:29:43,521 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2570 transitions, 80271 flow [2023-08-30 19:29:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.57142857142857) internal successors, (1965), 21 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states 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 19:29:43,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:29:43,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:29:43,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-30 19:29:43,724 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,SelfDestructingSolverStorable28 [2023-08-30 19:29:43,725 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 19:29:43,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:29:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1960753912, now seen corresponding path program 21 times [2023-08-30 19:29:43,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:29:43,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377090172] [2023-08-30 19:29:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:29:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:29:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:29:44,086 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 19:29:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:29:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377090172] [2023-08-30 19:29:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377090172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:29:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888648032] [2023-08-30 19:29:44,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:29:44,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:44,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:29:44,093 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 19:29:44,096 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 19:29:44,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:29:44,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:29:44,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:29:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:29:44,787 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 19:29:44,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:29:47,194 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-08-30 19:29:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-08-30 19:29:47,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888648032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:29:47,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:29:47,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-30 19:29:47,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979395584] [2023-08-30 19:29:47,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:29:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:29:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:29:47,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:29:47,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=321, Unknown=1, NotChecked=36, Total=420 [2023-08-30 19:29:47,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-08-30 19:29:47,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2570 transitions, 80271 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states 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 19:29:47,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:29:47,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-08-30 19:29:47,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:29:53,290 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* 4294967296 (div c_~k2~0 4294967296)))) (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse6 (* (div (+ c_~k1~0 1) 4294967296) 4294967296)) (.cse7 (< c_~j1~0 c_~m~0)) (.cse5 (+ .cse4 c_~k1~0)) (.cse11 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (or (let ((.cse3 (+ c_~k2~0 .cse6))) (and (<= .cse3 (+ .cse4 c_~k1~0 1)) (< .cse5 .cse3))) .cse7) (forall ((~m~0 Int)) (or (let ((.cse8 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse8 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse8) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (or (let ((.cse10 (+ c_~k2~0 c_~m~0 .cse6)) (.cse9 (* (div (+ c_~k2~0 c_~m~0) 4294967296) 4294967296))) (and (< (+ .cse9 c_~k1~0) .cse10) (<= .cse10 (+ .cse9 c_~k1~0 1)))) .cse7) (<= (+ c_~k2~0 .cse11) .cse5) (< .cse5 (+ c_~k2~0 .cse11 1))))) is different from false [2023-08-30 19:29:57,762 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-30 19:30:05,997 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-30 19:30:18,355 INFO L130 PetriNetUnfolder]: 12770/24176 cut-off events. [2023-08-30 19:30:18,355 INFO L131 PetriNetUnfolder]: For 1313617/1313617 co-relation queries the response was YES. [2023-08-30 19:30:18,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304670 conditions, 24176 events. 12770/24176 cut-off events. For 1313617/1313617 co-relation queries the response was YES. Maximal size of possible extension queue 1309. Compared 215640 event pairs, 1099 based on Foata normal form. 9/24185 useless extension candidates. Maximal degree in co-relation 300674. Up to 16328 conditions per place. [2023-08-30 19:30:18,821 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 1381 selfloop transitions, 1423 changer transitions 19/2823 dead transitions. [2023-08-30 19:30:18,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 2823 transitions, 92892 flow [2023-08-30 19:30:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 19:30:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 19:30:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2215 transitions. [2023-08-30 19:30:18,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39553571428571427 [2023-08-30 19:30:18,823 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2215 transitions. [2023-08-30 19:30:18,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2215 transitions. [2023-08-30 19:30:18,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:30:18,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2215 transitions. [2023-08-30 19:30:18,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 88.6) internal successors, (2215), 25 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states 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 19:30:18,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 224.0) internal successors, (5824), 26 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states 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 19:30:18,829 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 224.0) internal successors, (5824), 26 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states 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 19:30:18,830 INFO L175 Difference]: Start difference. First operand has 486 places, 2570 transitions, 80271 flow. Second operand 25 states and 2215 transitions. [2023-08-30 19:30:18,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 2823 transitions, 92892 flow [2023-08-30 19:30:36,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 2823 transitions, 90902 flow, removed 977 selfloop flow, removed 11 redundant places. [2023-08-30 19:30:36,903 INFO L231 Difference]: Finished difference. Result has 512 places, 2707 transitions, 87686 flow [2023-08-30 19:30:36,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=78281, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=87686, PETRI_PLACES=512, PETRI_TRANSITIONS=2707} [2023-08-30 19:30:36,906 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 493 predicate places. [2023-08-30 19:30:36,906 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 2707 transitions, 87686 flow [2023-08-30 19:30:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states 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 19:30:36,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:30:36,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:30:36,913 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 19:30:37,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:30:37,112 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 19:30:37,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:30:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash -155023124, now seen corresponding path program 22 times [2023-08-30 19:30:37,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:30:37,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094696989] [2023-08-30 19:30:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:30:37,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:30:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:30:37,491 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 19:30:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:30:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094696989] [2023-08-30 19:30:37,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094696989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:30:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713221677] [2023-08-30 19:30:37,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:30:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:30:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:30:37,501 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 19:30:37,504 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 19:30:37,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:30:37,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:30:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:30:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:30:38,173 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 19:30:38,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:30:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:30:38,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713221677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:30:38,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:30:38,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 19:30:38,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318709938] [2023-08-30 19:30:38,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:30:38,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:30:38,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:30:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:30:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:30:41,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:30:41,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 2707 transitions, 87686 flow. Second operand has 22 states, 22 states have (on average 93.27272727272727) internal successors, (2052), 22 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 19:30:41,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:30:41,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:30:41,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:31:13,625 INFO L130 PetriNetUnfolder]: 13312/25195 cut-off events. [2023-08-30 19:31:13,625 INFO L131 PetriNetUnfolder]: For 1511538/1511538 co-relation queries the response was YES. [2023-08-30 19:31:13,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337288 conditions, 25195 events. 13312/25195 cut-off events. For 1511538/1511538 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 226739 event pairs, 1172 based on Foata normal form. 13/25208 useless extension candidates. Maximal degree in co-relation 336198. Up to 12642 conditions per place. [2023-08-30 19:31:14,088 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1612 selfloop transitions, 1348 changer transitions 23/2983 dead transitions. [2023-08-30 19:31:14,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 2983 transitions, 102297 flow [2023-08-30 19:31:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 19:31:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 19:31:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2219 transitions. [2023-08-30 19:31:14,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43070652173913043 [2023-08-30 19:31:14,091 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2219 transitions. [2023-08-30 19:31:14,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2219 transitions. [2023-08-30 19:31:14,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:14,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2219 transitions. [2023-08-30 19:31:14,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 96.47826086956522) internal successors, (2219), 23 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states 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 19:31:14,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 19:31:14,095 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 19:31:14,095 INFO L175 Difference]: Start difference. First operand has 512 places, 2707 transitions, 87686 flow. Second operand 23 states and 2219 transitions. [2023-08-30 19:31:14,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 2983 transitions, 102297 flow [2023-08-30 19:31:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 2983 transitions, 100913 flow, removed 684 selfloop flow, removed 5 redundant places. [2023-08-30 19:31:35,527 INFO L231 Difference]: Finished difference. Result has 540 places, 2866 transitions, 95721 flow [2023-08-30 19:31:35,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=86302, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=95721, PETRI_PLACES=540, PETRI_TRANSITIONS=2866} [2023-08-30 19:31:35,530 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 521 predicate places. [2023-08-30 19:31:35,530 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2866 transitions, 95721 flow [2023-08-30 19:31:35,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.27272727272727) internal successors, (2052), 22 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 19:31:35,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:35,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:35,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 19:31:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:35,731 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 19:31:35,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash -641647828, now seen corresponding path program 23 times [2023-08-30 19:31:35,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:35,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289936996] [2023-08-30 19:31:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:35,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:36,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:36,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289936996] [2023-08-30 19:31:36,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289936996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:36,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103715180] [2023-08-30 19:31:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:31:36,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:36,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:36,205 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 19:31:36,236 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 19:31:36,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:31:36,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:36,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:31:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:36,830 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 19:31:36,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103715180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:31:37,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:31:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 19:31:37,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181755732] [2023-08-30 19:31:37,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:31:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:31:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:31:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:31:38,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:31:38,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2866 transitions, 95721 flow. Second operand has 21 states, 21 states have (on average 93.38095238095238) internal successors, (1961), 21 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 19:31:38,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:38,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:31:38,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:32:08,051 INFO L130 PetriNetUnfolder]: 14002/26508 cut-off events. [2023-08-30 19:32:08,052 INFO L131 PetriNetUnfolder]: For 1654188/1654188 co-relation queries the response was YES. [2023-08-30 19:32:08,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360837 conditions, 26508 events. 14002/26508 cut-off events. For 1654188/1654188 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 240960 event pairs, 1238 based on Foata normal form. 8/26516 useless extension candidates. Maximal degree in co-relation 359801. Up to 13235 conditions per place. [2023-08-30 19:32:08,557 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1723 selfloop transitions, 1442 changer transitions 48/3213 dead transitions. [2023-08-30 19:32:08,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 3213 transitions, 112856 flow [2023-08-30 19:32:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 19:32:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 19:32:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2326 transitions. [2023-08-30 19:32:08,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266369047619047 [2023-08-30 19:32:08,561 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2326 transitions. [2023-08-30 19:32:08,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2326 transitions. [2023-08-30 19:32:08,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:32:08,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2326 transitions. [2023-08-30 19:32:08,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.91666666666667) internal successors, (2326), 24 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 19:32:08,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states 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 19:32:08,567 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states 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 19:32:08,567 INFO L175 Difference]: Start difference. First operand has 540 places, 2866 transitions, 95721 flow. Second operand 24 states and 2326 transitions. [2023-08-30 19:32:08,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 3213 transitions, 112856 flow [2023-08-30 19:32:32,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 3213 transitions, 110641 flow, removed 1101 selfloop flow, removed 4 redundant places. [2023-08-30 19:32:33,088 INFO L231 Difference]: Finished difference. Result has 570 places, 3070 transitions, 107203 flow [2023-08-30 19:32:33,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=93506, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=107203, PETRI_PLACES=570, PETRI_TRANSITIONS=3070} [2023-08-30 19:32:33,092 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 551 predicate places. [2023-08-30 19:32:33,092 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 3070 transitions, 107203 flow [2023-08-30 19:32:33,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.38095238095238) internal successors, (1961), 21 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 19:32:33,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:32:33,093 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:32:33,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 19:32:33,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:32:33,298 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 19:32:33,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:32:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash -428826602, now seen corresponding path program 24 times [2023-08-30 19:32:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:32:33,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383120134] [2023-08-30 19:32:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:32:33,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:32:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:32:33,693 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 19:32:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:32:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383120134] [2023-08-30 19:32:33,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383120134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:32:33,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163890993] [2023-08-30 19:32:33,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:32:33,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:32:33,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:32:33,695 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:32:33,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 19:32:33,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:32:33,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:32:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 19:32:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:32:34,370 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 19:32:34,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:32:34,851 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 19:32:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163890993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:32:34,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:32:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-08-30 19:32:34,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736341456] [2023-08-30 19:32:34,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:32:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:32:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:32:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:32:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:32:36,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:32:36,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 3070 transitions, 107203 flow. Second operand has 23 states, 23 states have (on average 93.26086956521739) internal successors, (2145), 23 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states 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 19:32:36,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:32:36,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:32:36,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:33:15,988 INFO L130 PetriNetUnfolder]: 18339/34436 cut-off events. [2023-08-30 19:33:15,988 INFO L131 PetriNetUnfolder]: For 2348456/2348456 co-relation queries the response was YES. [2023-08-30 19:33:16,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498847 conditions, 34436 events. 18339/34436 cut-off events. For 2348456/2348456 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 321649 event pairs, 1360 based on Foata normal form. 10/34446 useless extension candidates. Maximal degree in co-relation 497792. Up to 18536 conditions per place. [2023-08-30 19:33:16,887 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2045 selfloop transitions, 2254 changer transitions 28/4327 dead transitions. [2023-08-30 19:33:16,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 4327 transitions, 163558 flow [2023-08-30 19:33:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 19:33:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 19:33:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3221 transitions. [2023-08-30 19:33:16,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435741341991342 [2023-08-30 19:33:16,890 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3221 transitions. [2023-08-30 19:33:16,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3221 transitions. [2023-08-30 19:33:16,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:33:16,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3221 transitions. [2023-08-30 19:33:16,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 97.60606060606061) internal successors, (3221), 33 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states 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 19:33:16,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states 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 19:33:16,898 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states 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 19:33:16,898 INFO L175 Difference]: Start difference. First operand has 570 places, 3070 transitions, 107203 flow. Second operand 33 states and 3221 transitions. [2023-08-30 19:33:16,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 4327 transitions, 163558 flow [2023-08-30 19:33:57,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 4327 transitions, 161247 flow, removed 1151 selfloop flow, removed 3 redundant places. [2023-08-30 19:33:57,231 INFO L231 Difference]: Finished difference. Result has 611 places, 3938 transitions, 153110 flow [2023-08-30 19:33:57,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=105330, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=153110, PETRI_PLACES=611, PETRI_TRANSITIONS=3938} [2023-08-30 19:33:57,233 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 592 predicate places. [2023-08-30 19:33:57,233 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 3938 transitions, 153110 flow [2023-08-30 19:33:57,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.26086956521739) internal successors, (2145), 23 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states 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 19:33:57,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:33:57,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:33:57,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-30 19:33:57,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:33:57,434 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 19:33:57,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:33:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash -750093574, now seen corresponding path program 25 times [2023-08-30 19:33:57,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:33:57,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404602272] [2023-08-30 19:33:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:33:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:33:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:33:57,808 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 19:33:57,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:33:57,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404602272] [2023-08-30 19:33:57,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404602272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:33:57,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078840028] [2023-08-30 19:33:57,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:33:57,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:33:57,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:33:57,810 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:33:57,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 19:33:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:33:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 19:33:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:33:58,595 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 19:33:58,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:33:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:33:58,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078840028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:33:58,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:33:58,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 19:33:58,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894915343] [2023-08-30 19:33:58,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:33:58,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:33:58,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:33:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:33:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:34:00,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-08-30 19:34:00,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 3938 transitions, 153110 flow. Second operand has 21 states, 21 states have (on average 93.38095238095238) internal successors, (1961), 21 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 19:34:00,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:34:00,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-08-30 19:34:00,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:34:05,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:34:58,924 INFO L130 PetriNetUnfolder]: 21519/40294 cut-off events. [2023-08-30 19:34:58,924 INFO L131 PetriNetUnfolder]: For 2963401/2963401 co-relation queries the response was YES. [2023-08-30 19:35:00,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605809 conditions, 40294 events. 21519/40294 cut-off events. For 2963401/2963401 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 384528 event pairs, 1721 based on Foata normal form. 12/40306 useless extension candidates. Maximal degree in co-relation 602090. Up to 17302 conditions per place. [2023-08-30 19:35:00,503 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2437 selfloop transitions, 2497 changer transitions 31/4965 dead transitions. [2023-08-30 19:35:00,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 4965 transitions, 203078 flow [2023-08-30 19:35:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 19:35:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 19:35:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2620 transitions. [2023-08-30 19:35:00,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332010582010582 [2023-08-30 19:35:00,506 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2620 transitions. [2023-08-30 19:35:00,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2620 transitions. [2023-08-30 19:35:00,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:35:00,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2620 transitions. [2023-08-30 19:35:00,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 97.03703703703704) internal successors, (2620), 27 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:35:00,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states 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 19:35:00,512 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states 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 19:35:00,512 INFO L175 Difference]: Start difference. First operand has 611 places, 3938 transitions, 153110 flow. Second operand 27 states and 2620 transitions. [2023-08-30 19:35:00,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 4965 transitions, 203078 flow Killed by 15