./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-1.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/parallel-misc-1.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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --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 19:38:48,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:38:48,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:38:48,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:38:48,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:38:48,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:38:48,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:38:48,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:38:48,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:38:48,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:38:48,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:38:48,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:38:48,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:38:48,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:38:48,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:38:48,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:38:48,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:38:48,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:38:48,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:38:48,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:38:48,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:38:48,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:38:48,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:38:48,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:38:48,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:38:48,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:38:48,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:38:48,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:38:48,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:38:48,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:38:48,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:38:48,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:38:48,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:38:48,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:38:48,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:38:48,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:38:48,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:38:48,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:38:48,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:38:48,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:38:48,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:38:48,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:38:48,691 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:38:48,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:38:48,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:38:48,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:38:48,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:38:48,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:38:48,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:38:48,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:38:48,694 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:38:48,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:38:48,695 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:38:48,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:38:48,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:38:48,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:38:48,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:38:48,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:38:48,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:38:48,697 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:38:48,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:38:48,697 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:38:48,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:38:48,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:38:48,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:38:48,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:38:48,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:38:48,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:38:48,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:38:48,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:38:48,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:38:48,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:38:48,699 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:38:48,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:38:48,700 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:38:48,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:38:48,700 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:38:48,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:38:49,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:38:49,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:38:49,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:38:49,047 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:38:49,048 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:38:49,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-08-30 19:38:50,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:38:50,371 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:38:50,372 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-08-30 19:38:50,378 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198463c0c/03fe4e7230524fc1add8cf572425d8ba/FLAG4aa612599 [2023-08-30 19:38:50,391 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198463c0c/03fe4e7230524fc1add8cf572425d8ba [2023-08-30 19:38:50,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:38:50,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:38:50,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:38:50,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:38:50,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:38:50,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f738ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50, skipping insertion in model container [2023-08-30 19:38:50,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:38:50,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:38:50,566 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/parallel-misc-1.wvr.c[2755,2768] [2023-08-30 19:38:50,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:38:50,583 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:38:50,602 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/parallel-misc-1.wvr.c[2755,2768] [2023-08-30 19:38:50,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:38:50,617 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:38:50,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50 WrapperNode [2023-08-30 19:38:50,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:38:50,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:38:50,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:38:50,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:38:50,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,657 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 287 [2023-08-30 19:38:50,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:38:50,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:38:50,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:38:50,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:38:50,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,682 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:38:50,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:38:50,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:38:50,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:38:50,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (1/1) ... [2023-08-30 19:38:50,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:38:50,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:50,718 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 19:38:50,731 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 19:38:50,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:38:50,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:38:50,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:38:50,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:38:50,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:38:50,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:38:50,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:38:50,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:38:50,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:38:50,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:38:50,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:38:50,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:38:50,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:38:50,752 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 19:38:50,845 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:38:50,848 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:38:51,252 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:38:51,262 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:38:51,262 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:38:51,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:38:51 BoogieIcfgContainer [2023-08-30 19:38:51,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:38:51,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:38:51,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:38:51,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:38:51,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:38:50" (1/3) ... [2023-08-30 19:38:51,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b500fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:38:51, skipping insertion in model container [2023-08-30 19:38:51,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:38:50" (2/3) ... [2023-08-30 19:38:51,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b500fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:38:51, skipping insertion in model container [2023-08-30 19:38:51,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:38:51" (3/3) ... [2023-08-30 19:38:51,278 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-08-30 19:38:51,285 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:38:51,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:38:51,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:38:51,293 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:38:51,413 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:38:51,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 346 transitions, 708 flow [2023-08-30 19:38:51,643 INFO L130 PetriNetUnfolder]: 28/344 cut-off events. [2023-08-30 19:38:51,644 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:38:51,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 344 events. 28/344 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 768 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-08-30 19:38:51,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 346 transitions, 708 flow [2023-08-30 19:38:51,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 336 transitions, 684 flow [2023-08-30 19:38:51,683 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:38:51,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 315 places, 336 transitions, 684 flow [2023-08-30 19:38:51,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 315 places, 336 transitions, 684 flow [2023-08-30 19:38:51,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 336 transitions, 684 flow [2023-08-30 19:38:51,771 INFO L130 PetriNetUnfolder]: 28/336 cut-off events. [2023-08-30 19:38:51,771 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:38:51,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 336 events. 28/336 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 761 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-08-30 19:38:51,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 25652 [2023-08-30 19:39:01,753 INFO L134 LiptonReduction]: Checked pairs total: 22140 [2023-08-30 19:39:01,754 INFO L136 LiptonReduction]: Total number of compositions: 413 [2023-08-30 19:39:01,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:39:01,772 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;@192b947e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:39:01,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:39:01,779 INFO L130 PetriNetUnfolder]: 4/16 cut-off events. [2023-08-30 19:39:01,780 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:39:01,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:01,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:01,781 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 19:39:01,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:01,785 INFO L85 PathProgramCache]: Analyzing trace with hash 200185486, now seen corresponding path program 1 times [2023-08-30 19:39:01,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:01,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236153115] [2023-08-30 19:39:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:01,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:02,717 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 19:39:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236153115] [2023-08-30 19:39:02,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236153115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:02,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:02,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:39:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61416645] [2023-08-30 19:39:02,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:02,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:02,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:02,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:02,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:39:02,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 759 [2023-08-30 19:39:02,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 305.4) internal successors, (1527), 5 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:02,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:02,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 759 [2023-08-30 19:39:02,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:02,963 INFO L130 PetriNetUnfolder]: 99/168 cut-off events. [2023-08-30 19:39:02,963 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 19:39:02,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 168 events. 99/168 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 490 event pairs, 15 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 294. Up to 91 conditions per place. [2023-08-30 19:39:02,966 INFO L137 encePairwiseOnDemand]: 752/759 looper letters, 32 selfloop transitions, 10 changer transitions 1/43 dead transitions. [2023-08-30 19:39:02,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 43 transitions, 199 flow [2023-08-30 19:39:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1563 transitions. [2023-08-30 19:39:02,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41185770750988143 [2023-08-30 19:39:02,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1563 transitions. [2023-08-30 19:39:02,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1563 transitions. [2023-08-30 19:39:02,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:02,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1563 transitions. [2023-08-30 19:39:03,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,013 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,014 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 46 flow. Second operand 5 states and 1563 transitions. [2023-08-30 19:39:03,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 43 transitions, 199 flow [2023-08-30 19:39:03,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:39:03,019 INFO L231 Difference]: Finished difference. Result has 23 places, 25 transitions, 99 flow [2023-08-30 19:39:03,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=25} [2023-08-30 19:39:03,023 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-30 19:39:03,023 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 25 transitions, 99 flow [2023-08-30 19:39:03,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.4) internal successors, (1527), 5 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:03,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:03,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:39:03,026 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 19:39:03,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash -419197718, now seen corresponding path program 1 times [2023-08-30 19:39:03,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:03,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108596205] [2023-08-30 19:39:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:03,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:03,163 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 19:39:03,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108596205] [2023-08-30 19:39:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108596205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:03,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:03,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:39:03,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285554264] [2023-08-30 19:39:03,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:03,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:03,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 759 [2023-08-30 19:39:03,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 25 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 309.25) internal successors, (1237), 4 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:03,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 759 [2023-08-30 19:39:03,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:03,310 INFO L130 PetriNetUnfolder]: 109/196 cut-off events. [2023-08-30 19:39:03,310 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-08-30 19:39:03,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 196 events. 109/196 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 634 event pairs, 17 based on Foata normal form. 8/196 useless extension candidates. Maximal degree in co-relation 258. Up to 69 conditions per place. [2023-08-30 19:39:03,312 INFO L137 encePairwiseOnDemand]: 753/759 looper letters, 39 selfloop transitions, 13 changer transitions 2/54 dead transitions. [2023-08-30 19:39:03,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 54 transitions, 307 flow [2023-08-30 19:39:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1572 transitions. [2023-08-30 19:39:03,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142292490118577 [2023-08-30 19:39:03,317 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1572 transitions. [2023-08-30 19:39:03,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1572 transitions. [2023-08-30 19:39:03,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:03,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1572 transitions. [2023-08-30 19:39:03,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,331 INFO L175 Difference]: Start difference. First operand has 23 places, 25 transitions, 99 flow. Second operand 5 states and 1572 transitions. [2023-08-30 19:39:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 54 transitions, 307 flow [2023-08-30 19:39:03,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 54 transitions, 305 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:03,333 INFO L231 Difference]: Finished difference. Result has 30 places, 34 transitions, 205 flow [2023-08-30 19:39:03,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=30, PETRI_TRANSITIONS=34} [2023-08-30 19:39:03,334 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-08-30 19:39:03,334 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 34 transitions, 205 flow [2023-08-30 19:39:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.25) internal successors, (1237), 4 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:03,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:03,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:39:03,336 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 19:39:03,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1716415558, now seen corresponding path program 2 times [2023-08-30 19:39:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066624420] [2023-08-30 19:39:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:03,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:03,475 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 19:39:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:03,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066624420] [2023-08-30 19:39:03,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066624420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:03,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:03,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:03,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766365042] [2023-08-30 19:39:03,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:03,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:03,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 759 [2023-08-30 19:39:03,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 34 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:03,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 759 [2023-08-30 19:39:03,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:03,653 INFO L130 PetriNetUnfolder]: 169/319 cut-off events. [2023-08-30 19:39:03,653 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2023-08-30 19:39:03,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 319 events. 169/319 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1234 event pairs, 67 based on Foata normal form. 16/335 useless extension candidates. Maximal degree in co-relation 612. Up to 122 conditions per place. [2023-08-30 19:39:03,656 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 55 selfloop transitions, 9 changer transitions 2/66 dead transitions. [2023-08-30 19:39:03,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 66 transitions, 514 flow [2023-08-30 19:39:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1577 transitions. [2023-08-30 19:39:03,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155467720685112 [2023-08-30 19:39:03,661 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1577 transitions. [2023-08-30 19:39:03,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1577 transitions. [2023-08-30 19:39:03,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:03,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1577 transitions. [2023-08-30 19:39:03,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,674 INFO L175 Difference]: Start difference. First operand has 30 places, 34 transitions, 205 flow. Second operand 5 states and 1577 transitions. [2023-08-30 19:39:03,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 66 transitions, 514 flow [2023-08-30 19:39:03,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 66 transitions, 502 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:03,679 INFO L231 Difference]: Finished difference. Result has 37 places, 39 transitions, 278 flow [2023-08-30 19:39:03,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=37, PETRI_TRANSITIONS=39} [2023-08-30 19:39:03,680 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-08-30 19:39:03,680 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 39 transitions, 278 flow [2023-08-30 19:39:03,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:03,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:03,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:39:03,682 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 19:39:03,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1708128844, now seen corresponding path program 1 times [2023-08-30 19:39:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:03,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823299287] [2023-08-30 19:39:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:03,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:03,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823299287] [2023-08-30 19:39:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823299287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:03,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:39:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764760487] [2023-08-30 19:39:03,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:03,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 759 [2023-08-30 19:39:03,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:03,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 759 [2023-08-30 19:39:03,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:03,972 INFO L130 PetriNetUnfolder]: 155/293 cut-off events. [2023-08-30 19:39:03,972 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-08-30 19:39:03,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 293 events. 155/293 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1124 event pairs, 16 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 758. Up to 134 conditions per place. [2023-08-30 19:39:03,975 INFO L137 encePairwiseOnDemand]: 753/759 looper letters, 39 selfloop transitions, 20 changer transitions 6/65 dead transitions. [2023-08-30 19:39:03,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 551 flow [2023-08-30 19:39:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2023-08-30 19:39:03,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134387351778656 [2023-08-30 19:39:03,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2023-08-30 19:39:03,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2023-08-30 19:39:03,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:03,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2023-08-30 19:39:03,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,993 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:03,993 INFO L175 Difference]: Start difference. First operand has 37 places, 39 transitions, 278 flow. Second operand 5 states and 1569 transitions. [2023-08-30 19:39:03,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 551 flow [2023-08-30 19:39:03,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 541 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:03,997 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 399 flow [2023-08-30 19:39:03,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 19:39:03,998 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-08-30 19:39:03,998 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 399 flow [2023-08-30 19:39:03,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:04,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:04,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 19:39:04,000 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 19:39:04,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1411080757, now seen corresponding path program 1 times [2023-08-30 19:39:04,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:04,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669326526] [2023-08-30 19:39:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:04,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:04,175 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 19:39:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669326526] [2023-08-30 19:39:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669326526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:04,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:04,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:04,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827267261] [2023-08-30 19:39:04,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:04,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:04,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:04,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:04,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 759 [2023-08-30 19:39:04,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 311.5) internal successors, (1246), 4 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:04,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 759 [2023-08-30 19:39:04,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:04,328 INFO L130 PetriNetUnfolder]: 94/176 cut-off events. [2023-08-30 19:39:04,329 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2023-08-30 19:39:04,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 176 events. 94/176 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 536 event pairs, 34 based on Foata normal form. 6/182 useless extension candidates. Maximal degree in co-relation 765. Up to 126 conditions per place. [2023-08-30 19:39:04,331 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 40 selfloop transitions, 4 changer transitions 10/54 dead transitions. [2023-08-30 19:39:04,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 510 flow [2023-08-30 19:39:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1573 transitions. [2023-08-30 19:39:04,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144927536231884 [2023-08-30 19:39:04,336 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1573 transitions. [2023-08-30 19:39:04,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1573 transitions. [2023-08-30 19:39:04,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:04,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1573 transitions. [2023-08-30 19:39:04,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,346 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,346 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 399 flow. Second operand 5 states and 1573 transitions. [2023-08-30 19:39:04,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 510 flow [2023-08-30 19:39:04,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 500 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:04,350 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 328 flow [2023-08-30 19:39:04,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-30 19:39:04,351 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-08-30 19:39:04,351 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 328 flow [2023-08-30 19:39:04,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 311.5) internal successors, (1246), 4 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:04,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:04,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 19:39:04,352 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 19:39:04,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1125366281, now seen corresponding path program 1 times [2023-08-30 19:39:04,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:04,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982745322] [2023-08-30 19:39:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:04,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:04,470 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 19:39:04,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:04,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982745322] [2023-08-30 19:39:04,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982745322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:04,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476336891] [2023-08-30 19:39:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:04,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:04,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:04,475 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 19:39:04,479 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 19:39:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:39:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:04,737 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 19:39:04,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476336891] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:04,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:39:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-08-30 19:39:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773685866] [2023-08-30 19:39:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:39:04,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:04,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:39:04,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:39:04,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 759 [2023-08-30 19:39:04,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:04,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 759 [2023-08-30 19:39:04,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:04,924 INFO L130 PetriNetUnfolder]: 100/169 cut-off events. [2023-08-30 19:39:04,925 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2023-08-30 19:39:04,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 169 events. 100/169 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 440 event pairs, 18 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 767. Up to 111 conditions per place. [2023-08-30 19:39:04,927 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 40 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-08-30 19:39:04,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 458 flow [2023-08-30 19:39:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1550 transitions. [2023-08-30 19:39:04,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40843214756258234 [2023-08-30 19:39:04,932 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1550 transitions. [2023-08-30 19:39:04,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1550 transitions. [2023-08-30 19:39:04,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:04,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1550 transitions. [2023-08-30 19:39:04,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,942 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 328 flow. Second operand 5 states and 1550 transitions. [2023-08-30 19:39:04,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 458 flow [2023-08-30 19:39:04,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 410 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-08-30 19:39:04,946 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 303 flow [2023-08-30 19:39:04,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-30 19:39:04,947 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-08-30 19:39:04,947 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 303 flow [2023-08-30 19:39:04,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:04,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:04,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:04,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 19:39:05,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 19:39:05,154 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 19:39:05,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash -4780107, now seen corresponding path program 1 times [2023-08-30 19:39:05,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:05,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430095388] [2023-08-30 19:39:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:05,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:07,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430095388] [2023-08-30 19:39:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430095388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968950752] [2023-08-30 19:39:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:07,565 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 19:39:07,573 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 19:39:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:07,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 19:39:07,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:08,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 107 [2023-08-30 19:39:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:08,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:09,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:09,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 221 [2023-08-30 19:39:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:09,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968950752] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:09,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:09,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-08-30 19:39:09,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740265719] [2023-08-30 19:39:09,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:09,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:39:09,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:39:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:39:11,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 759 [2023-08-30 19:39:11,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 303 flow. Second operand has 20 states, 20 states have (on average 276.25) internal successors, (5525), 20 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:11,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:11,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 759 [2023-08-30 19:39:11,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:12,327 INFO L130 PetriNetUnfolder]: 272/472 cut-off events. [2023-08-30 19:39:12,328 INFO L131 PetriNetUnfolder]: For 1192/1192 co-relation queries the response was YES. [2023-08-30 19:39:12,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 472 events. 272/472 cut-off events. For 1192/1192 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1811 event pairs, 6 based on Foata normal form. 3/475 useless extension candidates. Maximal degree in co-relation 1728. Up to 181 conditions per place. [2023-08-30 19:39:12,332 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 104 selfloop transitions, 55 changer transitions 7/166 dead transitions. [2023-08-30 19:39:12,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 166 transitions, 1411 flow [2023-08-30 19:39:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:39:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:39:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5332 transitions. [2023-08-30 19:39:12,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36973857568823243 [2023-08-30 19:39:12,346 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5332 transitions. [2023-08-30 19:39:12,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5332 transitions. [2023-08-30 19:39:12,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:12,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5332 transitions. [2023-08-30 19:39:12,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 280.63157894736844) internal successors, (5332), 19 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,392 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,393 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 303 flow. Second operand 19 states and 5332 transitions. [2023-08-30 19:39:12,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 166 transitions, 1411 flow [2023-08-30 19:39:12,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 166 transitions, 1408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 19:39:12,400 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 943 flow [2023-08-30 19:39:12,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=943, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-30 19:39:12,402 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-08-30 19:39:12,403 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 943 flow [2023-08-30 19:39:12,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 276.25) internal successors, (5525), 20 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:12,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:12,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:12,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 19:39:12,611 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 19:39:12,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1877271009, now seen corresponding path program 2 times [2023-08-30 19:39:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:12,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620979551] [2023-08-30 19:39:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:14,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620979551] [2023-08-30 19:39:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620979551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:14,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918194001] [2023-08-30 19:39:14,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:39:14,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:14,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:14,259 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 19:39:14,278 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 19:39:14,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:39:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:14,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 19:39:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:14,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 101 [2023-08-30 19:39:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:14,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:15,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:15,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 221 [2023-08-30 19:39:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:16,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918194001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:16,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:16,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-08-30 19:39:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700519155] [2023-08-30 19:39:16,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:16,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:39:16,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:39:16,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:39:17,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 759 [2023-08-30 19:39:17,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 943 flow. Second operand has 21 states, 21 states have (on average 281.04761904761904) internal successors, (5902), 21 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:17,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:17,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 759 [2023-08-30 19:39:17,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:19,888 INFO L130 PetriNetUnfolder]: 647/1126 cut-off events. [2023-08-30 19:39:19,888 INFO L131 PetriNetUnfolder]: For 7759/7759 co-relation queries the response was YES. [2023-08-30 19:39:19,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6907 conditions, 1126 events. 647/1126 cut-off events. For 7759/7759 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5655 event pairs, 14 based on Foata normal form. 24/1150 useless extension candidates. Maximal degree in co-relation 5613. Up to 387 conditions per place. [2023-08-30 19:39:19,901 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 172 selfloop transitions, 212 changer transitions 17/401 dead transitions. [2023-08-30 19:39:19,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 401 transitions, 4549 flow [2023-08-30 19:39:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 19:39:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 19:39:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 13122 transitions. [2023-08-30 19:39:19,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37583777281319813 [2023-08-30 19:39:19,930 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 13122 transitions. [2023-08-30 19:39:19,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 13122 transitions. [2023-08-30 19:39:19,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:19,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 13122 transitions. [2023-08-30 19:39:19,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 285.2608695652174) internal successors, (13122), 46 states have internal predecessors, (13122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:19,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 759.0) internal successors, (35673), 47 states have internal predecessors, (35673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:20,006 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 759.0) internal successors, (35673), 47 states have internal predecessors, (35673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:20,006 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 943 flow. Second operand 46 states and 13122 transitions. [2023-08-30 19:39:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 401 transitions, 4549 flow [2023-08-30 19:39:20,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 401 transitions, 4260 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-08-30 19:39:20,090 INFO L231 Difference]: Finished difference. Result has 125 places, 253 transitions, 3493 flow [2023-08-30 19:39:20,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3493, PETRI_PLACES=125, PETRI_TRANSITIONS=253} [2023-08-30 19:39:20,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-08-30 19:39:20,093 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 253 transitions, 3493 flow [2023-08-30 19:39:20,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 281.04761904761904) internal successors, (5902), 21 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:20,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:20,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:20,102 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 19:39:20,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:20,295 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 19:39:20,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1904976639, now seen corresponding path program 3 times [2023-08-30 19:39:20,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:20,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035041772] [2023-08-30 19:39:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:20,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:21,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035041772] [2023-08-30 19:39:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035041772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:21,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40904227] [2023-08-30 19:39:21,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:39:21,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:21,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:21,883 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 19:39:21,886 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 19:39:21,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:39:21,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 19:39:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:22,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:39:22,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:39:22,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:39:22,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 107 [2023-08-30 19:39:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:22,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:23,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40904227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:23,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:23,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-30 19:39:23,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474243808] [2023-08-30 19:39:23,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:23,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:39:23,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:39:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=326, Unknown=4, NotChecked=0, Total=420 [2023-08-30 19:39:25,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 759 [2023-08-30 19:39:25,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 253 transitions, 3493 flow. Second operand has 21 states, 21 states have (on average 245.0) internal successors, (5145), 21 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:25,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:25,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 759 [2023-08-30 19:39:25,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:31,315 INFO L130 PetriNetUnfolder]: 713/1249 cut-off events. [2023-08-30 19:39:31,316 INFO L131 PetriNetUnfolder]: For 11887/11887 co-relation queries the response was YES. [2023-08-30 19:39:31,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8707 conditions, 1249 events. 713/1249 cut-off events. For 11887/11887 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6482 event pairs, 34 based on Foata normal form. 3/1252 useless extension candidates. Maximal degree in co-relation 7940. Up to 526 conditions per place. [2023-08-30 19:39:31,330 INFO L137 encePairwiseOnDemand]: 750/759 looper letters, 199 selfloop transitions, 158 changer transitions 10/367 dead transitions. [2023-08-30 19:39:31,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 367 transitions, 5322 flow [2023-08-30 19:39:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 19:39:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 19:39:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6231 transitions. [2023-08-30 19:39:31,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3283794466403162 [2023-08-30 19:39:31,340 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6231 transitions. [2023-08-30 19:39:31,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6231 transitions. [2023-08-30 19:39:31,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:31,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6231 transitions. [2023-08-30 19:39:31,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 249.24) internal successors, (6231), 25 states have internal predecessors, (6231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:31,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 759.0) internal successors, (19734), 26 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:31,365 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 759.0) internal successors, (19734), 26 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:31,366 INFO L175 Difference]: Start difference. First operand has 125 places, 253 transitions, 3493 flow. Second operand 25 states and 6231 transitions. [2023-08-30 19:39:31,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 367 transitions, 5322 flow [2023-08-30 19:39:31,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 367 transitions, 4260 flow, removed 496 selfloop flow, removed 9 redundant places. [2023-08-30 19:39:31,447 INFO L231 Difference]: Finished difference. Result has 151 places, 290 transitions, 3554 flow [2023-08-30 19:39:31,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3554, PETRI_PLACES=151, PETRI_TRANSITIONS=290} [2023-08-30 19:39:31,449 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-08-30 19:39:31,449 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 290 transitions, 3554 flow [2023-08-30 19:39:31,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 245.0) internal successors, (5145), 21 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:31,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:31,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:31,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:31,656 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 19:39:31,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1874892425, now seen corresponding path program 4 times [2023-08-30 19:39:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479440315] [2023-08-30 19:39:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:34,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479440315] [2023-08-30 19:39:34,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479440315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319025114] [2023-08-30 19:39:34,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:39:34,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:34,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:34,249 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 19:39:34,269 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 19:39:34,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:39:34,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:34,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 19:39:34,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:34,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 103 [2023-08-30 19:39:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:34,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:35,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:35,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 349 treesize of output 261 [2023-08-30 19:39:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:35,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319025114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:35,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:35,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-30 19:39:35,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053970193] [2023-08-30 19:39:35,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:35,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:39:35,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:39:35,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:39:37,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 759 [2023-08-30 19:39:37,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 290 transitions, 3554 flow. Second operand has 22 states, 22 states have (on average 275.95454545454544) internal successors, (6071), 22 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:37,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:37,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 759 [2023-08-30 19:39:37,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:41,033 INFO L130 PetriNetUnfolder]: 799/1438 cut-off events. [2023-08-30 19:39:41,034 INFO L131 PetriNetUnfolder]: For 9008/9008 co-relation queries the response was YES. [2023-08-30 19:39:41,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8860 conditions, 1438 events. 799/1438 cut-off events. For 9008/9008 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7882 event pairs, 14 based on Foata normal form. 11/1449 useless extension candidates. Maximal degree in co-relation 8745. Up to 414 conditions per place. [2023-08-30 19:39:41,051 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 153 selfloop transitions, 292 changer transitions 21/466 dead transitions. [2023-08-30 19:39:41,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 466 transitions, 5847 flow [2023-08-30 19:39:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 19:39:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 19:39:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 10343 transitions. [2023-08-30 19:39:41,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683011074315422 [2023-08-30 19:39:41,063 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 10343 transitions. [2023-08-30 19:39:41,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 10343 transitions. [2023-08-30 19:39:41,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:41,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 10343 transitions. [2023-08-30 19:39:41,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 279.5405405405405) internal successors, (10343), 37 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:41,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 759.0) internal successors, (28842), 38 states have internal predecessors, (28842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:41,100 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 759.0) internal successors, (28842), 38 states have internal predecessors, (28842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:41,100 INFO L175 Difference]: Start difference. First operand has 151 places, 290 transitions, 3554 flow. Second operand 37 states and 10343 transitions. [2023-08-30 19:39:41,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 466 transitions, 5847 flow [2023-08-30 19:39:41,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 466 transitions, 5634 flow, removed 81 selfloop flow, removed 9 redundant places. [2023-08-30 19:39:41,175 INFO L231 Difference]: Finished difference. Result has 187 places, 371 transitions, 5451 flow [2023-08-30 19:39:41,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5451, PETRI_PLACES=187, PETRI_TRANSITIONS=371} [2023-08-30 19:39:41,177 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 167 predicate places. [2023-08-30 19:39:41,177 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 371 transitions, 5451 flow [2023-08-30 19:39:41,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 275.95454545454544) internal successors, (6071), 22 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:41,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:41,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:41,184 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 19:39:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 19:39:41,385 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 19:39:41,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:41,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1562389633, now seen corresponding path program 5 times [2023-08-30 19:39:41,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:41,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315588337] [2023-08-30 19:39:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:41,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:42,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315588337] [2023-08-30 19:39:42,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315588337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866231782] [2023-08-30 19:39:42,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:39:42,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:42,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:42,137 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 19:39:42,139 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 19:39:42,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:39:42,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 19:39:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:42,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 103 [2023-08-30 19:39:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:42,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:43,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:43,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 349 treesize of output 261 [2023-08-30 19:39:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:44,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866231782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:44,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:44,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-30 19:39:44,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707726311] [2023-08-30 19:39:44,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:44,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:39:44,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:39:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:39:45,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 759 [2023-08-30 19:39:45,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 371 transitions, 5451 flow. Second operand has 22 states, 22 states have (on average 281.0) internal successors, (6182), 22 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:45,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:45,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 759 [2023-08-30 19:39:45,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:47,036 INFO L130 PetriNetUnfolder]: 788/1403 cut-off events. [2023-08-30 19:39:47,037 INFO L131 PetriNetUnfolder]: For 11309/11309 co-relation queries the response was YES. [2023-08-30 19:39:47,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10021 conditions, 1403 events. 788/1403 cut-off events. For 11309/11309 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7559 event pairs, 15 based on Foata normal form. 9/1412 useless extension candidates. Maximal degree in co-relation 9951. Up to 400 conditions per place. [2023-08-30 19:39:47,052 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 139 selfloop transitions, 301 changer transitions 13/453 dead transitions. [2023-08-30 19:39:47,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 453 transitions, 6676 flow [2023-08-30 19:39:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:39:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:39:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8829 transitions. [2023-08-30 19:39:47,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37523906668366697 [2023-08-30 19:39:47,065 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8829 transitions. [2023-08-30 19:39:47,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8829 transitions. [2023-08-30 19:39:47,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:47,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8829 transitions. [2023-08-30 19:39:47,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 284.80645161290323) internal successors, (8829), 31 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:47,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 759.0) internal successors, (24288), 32 states have internal predecessors, (24288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:47,094 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 759.0) internal successors, (24288), 32 states have internal predecessors, (24288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:47,094 INFO L175 Difference]: Start difference. First operand has 187 places, 371 transitions, 5451 flow. Second operand 31 states and 8829 transitions. [2023-08-30 19:39:47,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 453 transitions, 6676 flow [2023-08-30 19:39:47,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 453 transitions, 6325 flow, removed 114 selfloop flow, removed 16 redundant places. [2023-08-30 19:39:47,187 INFO L231 Difference]: Finished difference. Result has 200 places, 375 transitions, 5830 flow [2023-08-30 19:39:47,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=4837, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5830, PETRI_PLACES=200, PETRI_TRANSITIONS=375} [2023-08-30 19:39:47,188 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-30 19:39:47,189 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 375 transitions, 5830 flow [2023-08-30 19:39:47,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 281.0) internal successors, (6182), 22 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:47,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:47,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:47,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:47,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:47,396 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 19:39:47,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1534684003, now seen corresponding path program 6 times [2023-08-30 19:39:47,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:47,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980521396] [2023-08-30 19:39:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980521396] [2023-08-30 19:39:48,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980521396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849677684] [2023-08-30 19:39:48,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:39:48,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:48,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:48,133 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 19:39:48,135 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 19:39:48,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:39:48,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 19:39:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:48,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 103 [2023-08-30 19:39:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:48,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:49,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:49,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 251 [2023-08-30 19:39:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:49,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849677684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:49,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:49,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-30 19:39:49,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832652982] [2023-08-30 19:39:49,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:49,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:39:49,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:39:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:39:50,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 759 [2023-08-30 19:39:50,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 375 transitions, 5830 flow. Second operand has 18 states, 18 states have (on average 285.3333333333333) internal successors, (5136), 18 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:50,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:50,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 759 [2023-08-30 19:39:50,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:51,305 INFO L130 PetriNetUnfolder]: 790/1396 cut-off events. [2023-08-30 19:39:51,305 INFO L131 PetriNetUnfolder]: For 9236/9236 co-relation queries the response was YES. [2023-08-30 19:39:51,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10342 conditions, 1396 events. 790/1396 cut-off events. For 9236/9236 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7397 event pairs, 41 based on Foata normal form. 2/1398 useless extension candidates. Maximal degree in co-relation 10229. Up to 680 conditions per place. [2023-08-30 19:39:51,330 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 251 selfloop transitions, 164 changer transitions 10/425 dead transitions. [2023-08-30 19:39:51,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 425 transitions, 6887 flow [2023-08-30 19:39:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 19:39:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 19:39:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6065 transitions. [2023-08-30 19:39:51,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38051320660016313 [2023-08-30 19:39:51,338 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6065 transitions. [2023-08-30 19:39:51,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6065 transitions. [2023-08-30 19:39:51,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:51,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6065 transitions. [2023-08-30 19:39:51,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 288.8095238095238) internal successors, (6065), 21 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:51,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 759.0) internal successors, (16698), 22 states have internal predecessors, (16698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:51,356 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 759.0) internal successors, (16698), 22 states have internal predecessors, (16698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:51,356 INFO L175 Difference]: Start difference. First operand has 200 places, 375 transitions, 5830 flow. Second operand 21 states and 6065 transitions. [2023-08-30 19:39:51,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 425 transitions, 6887 flow [2023-08-30 19:39:51,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 425 transitions, 6639 flow, removed 36 selfloop flow, removed 20 redundant places. [2023-08-30 19:39:51,439 INFO L231 Difference]: Finished difference. Result has 200 places, 375 transitions, 5939 flow [2023-08-30 19:39:51,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5939, PETRI_PLACES=200, PETRI_TRANSITIONS=375} [2023-08-30 19:39:51,442 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-30 19:39:51,442 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 375 transitions, 5939 flow [2023-08-30 19:39:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 285.3333333333333) internal successors, (5136), 18 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:51,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:51,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:51,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:51,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:51,650 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 19:39:51,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash 761414257, now seen corresponding path program 7 times [2023-08-30 19:39:51,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:51,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852307743] [2023-08-30 19:39:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:51,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:52,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:52,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852307743] [2023-08-30 19:39:52,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852307743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:52,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507736480] [2023-08-30 19:39:52,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:39:52,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:52,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:52,584 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 19:39:52,587 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 19:39:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:39:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:52,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 19:39:52,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 107 [2023-08-30 19:39:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:53,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:53,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:53,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 427 treesize of output 371 [2023-08-30 19:39:53,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 151 [2023-08-30 19:39:53,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2023-08-30 19:39:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507736480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:54,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:54,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-08-30 19:39:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962052407] [2023-08-30 19:39:54,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:54,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:39:54,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:54,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:39:54,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=372, Unknown=9, NotChecked=0, Total=462 [2023-08-30 19:39:55,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 759 [2023-08-30 19:39:55,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 375 transitions, 5939 flow. Second operand has 22 states, 22 states have (on average 247.9090909090909) internal successors, (5454), 22 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:55,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:55,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 759 [2023-08-30 19:39:55,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:56,185 INFO L130 PetriNetUnfolder]: 796/1410 cut-off events. [2023-08-30 19:39:56,185 INFO L131 PetriNetUnfolder]: For 9902/9902 co-relation queries the response was YES. [2023-08-30 19:39:56,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10585 conditions, 1410 events. 796/1410 cut-off events. For 9902/9902 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7533 event pairs, 54 based on Foata normal form. 2/1412 useless extension candidates. Maximal degree in co-relation 10473. Up to 917 conditions per place. [2023-08-30 19:39:56,199 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 330 selfloop transitions, 75 changer transitions 8/413 dead transitions. [2023-08-30 19:39:56,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 413 transitions, 6957 flow [2023-08-30 19:39:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:39:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:39:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3786 transitions. [2023-08-30 19:39:56,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325428194993412 [2023-08-30 19:39:56,205 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3786 transitions. [2023-08-30 19:39:56,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3786 transitions. [2023-08-30 19:39:56,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:56,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3786 transitions. [2023-08-30 19:39:56,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 252.4) internal successors, (3786), 15 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 759.0) internal successors, (12144), 16 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,217 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 759.0) internal successors, (12144), 16 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,217 INFO L175 Difference]: Start difference. First operand has 200 places, 375 transitions, 5939 flow. Second operand 15 states and 3786 transitions. [2023-08-30 19:39:56,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 413 transitions, 6957 flow [2023-08-30 19:39:56,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 413 transitions, 6747 flow, removed 14 selfloop flow, removed 16 redundant places. [2023-08-30 19:39:56,297 INFO L231 Difference]: Finished difference. Result has 200 places, 377 transitions, 5948 flow [2023-08-30 19:39:56,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5948, PETRI_PLACES=200, PETRI_TRANSITIONS=377} [2023-08-30 19:39:56,298 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-30 19:39:56,298 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 377 transitions, 5948 flow [2023-08-30 19:39:56,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 247.9090909090909) internal successors, (5454), 22 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:56,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:56,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:56,305 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 19:39:56,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 19:39:56,500 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 19:39:56,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:56,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1100080267, now seen corresponding path program 8 times [2023-08-30 19:39:56,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:56,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741008028] [2023-08-30 19:39:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:56,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:57,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:57,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741008028] [2023-08-30 19:39:57,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741008028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814276999] [2023-08-30 19:39:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:39:57,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:57,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:57,693 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 19:39:57,694 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 19:39:57,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:39:57,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 19:39:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:57,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:39:57,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:39:58,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:58,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 19:39:58,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 101 [2023-08-30 19:39:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:58,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:59,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:59,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 61 [2023-08-30 19:39:59,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 204 [2023-08-30 19:39:59,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 122 [2023-08-30 19:39:59,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2023-08-30 19:39:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814276999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:59,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-08-30 19:39:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093798358] [2023-08-30 19:39:59,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:59,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:39:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:59,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:39:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=501, Unknown=1, NotChecked=0, Total=600 [2023-08-30 19:40:01,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 759 [2023-08-30 19:40:01,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 377 transitions, 5948 flow. Second operand has 25 states, 25 states have (on average 244.72) internal successors, (6118), 25 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:01,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:01,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 759 [2023-08-30 19:40:01,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:04,714 INFO L130 PetriNetUnfolder]: 862/1536 cut-off events. [2023-08-30 19:40:04,714 INFO L131 PetriNetUnfolder]: For 10675/10675 co-relation queries the response was YES. [2023-08-30 19:40:04,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11375 conditions, 1536 events. 862/1536 cut-off events. For 10675/10675 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8461 event pairs, 34 based on Foata normal form. 2/1538 useless extension candidates. Maximal degree in co-relation 11233. Up to 865 conditions per place. [2023-08-30 19:40:04,726 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 242 selfloop transitions, 208 changer transitions 5/455 dead transitions. [2023-08-30 19:40:04,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 455 transitions, 7598 flow [2023-08-30 19:40:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:40:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:40:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4720 transitions. [2023-08-30 19:40:04,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32730046460023576 [2023-08-30 19:40:04,731 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4720 transitions. [2023-08-30 19:40:04,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4720 transitions. [2023-08-30 19:40:04,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:04,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4720 transitions. [2023-08-30 19:40:04,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 248.42105263157896) internal successors, (4720), 19 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:04,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:04,745 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:04,745 INFO L175 Difference]: Start difference. First operand has 200 places, 377 transitions, 5948 flow. Second operand 19 states and 4720 transitions. [2023-08-30 19:40:04,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 455 transitions, 7598 flow [2023-08-30 19:40:04,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 455 transitions, 7478 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-08-30 19:40:04,819 INFO L231 Difference]: Finished difference. Result has 208 places, 406 transitions, 6780 flow [2023-08-30 19:40:04,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5832, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6780, PETRI_PLACES=208, PETRI_TRANSITIONS=406} [2023-08-30 19:40:04,820 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-08-30 19:40:04,820 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 406 transitions, 6780 flow [2023-08-30 19:40:04,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 244.72) internal successors, (6118), 25 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:04,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:04,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:04,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:05,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 19:40:05,022 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 19:40:05,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash -158822419, now seen corresponding path program 9 times [2023-08-30 19:40:05,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:05,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111413275] [2023-08-30 19:40:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:05,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:05,145 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 19:40:05,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:05,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111413275] [2023-08-30 19:40:05,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111413275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:05,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610177189] [2023-08-30 19:40:05,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:40:05,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:05,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:05,149 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 19:40:05,160 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 19:40:05,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:40:05,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:05,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:40:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:05,495 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 19:40:05,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:05,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 201 [2023-08-30 19:40:05,944 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 19:40:05,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610177189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:05,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:05,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-30 19:40:05,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463825485] [2023-08-30 19:40:05,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:05,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:40:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:40:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:40:06,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 759 [2023-08-30 19:40:06,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 406 transitions, 6780 flow. Second operand has 16 states, 16 states have (on average 296.9375) internal successors, (4751), 16 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:06,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:06,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 759 [2023-08-30 19:40:06,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:06,856 INFO L130 PetriNetUnfolder]: 808/1431 cut-off events. [2023-08-30 19:40:06,856 INFO L131 PetriNetUnfolder]: For 12173/12173 co-relation queries the response was YES. [2023-08-30 19:40:06,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10979 conditions, 1431 events. 808/1431 cut-off events. For 12173/12173 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7590 event pairs, 82 based on Foata normal form. 61/1492 useless extension candidates. Maximal degree in co-relation 10925. Up to 474 conditions per place. [2023-08-30 19:40:06,869 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 205 selfloop transitions, 222 changer transitions 0/427 dead transitions. [2023-08-30 19:40:06,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 427 transitions, 7280 flow [2023-08-30 19:40:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:40:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:40:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5689 transitions. [2023-08-30 19:40:06,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944941404895638 [2023-08-30 19:40:06,883 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5689 transitions. [2023-08-30 19:40:06,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5689 transitions. [2023-08-30 19:40:06,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:06,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5689 transitions. [2023-08-30 19:40:06,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 299.42105263157896) internal successors, (5689), 19 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:06,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:06,898 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:06,899 INFO L175 Difference]: Start difference. First operand has 208 places, 406 transitions, 6780 flow. Second operand 19 states and 5689 transitions. [2023-08-30 19:40:06,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 427 transitions, 7280 flow [2023-08-30 19:40:06,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 427 transitions, 6957 flow, removed 23 selfloop flow, removed 22 redundant places. [2023-08-30 19:40:06,989 INFO L231 Difference]: Finished difference. Result has 202 places, 380 transitions, 6523 flow [2023-08-30 19:40:06,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6523, PETRI_PLACES=202, PETRI_TRANSITIONS=380} [2023-08-30 19:40:06,990 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-08-30 19:40:06,990 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 380 transitions, 6523 flow [2023-08-30 19:40:06,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 296.9375) internal successors, (4751), 16 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:06,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:06,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:06,999 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 19:40:07,196 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,SelfDestructingSolverStorable14 [2023-08-30 19:40:07,197 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 19:40:07,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash 962779119, now seen corresponding path program 10 times [2023-08-30 19:40:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:07,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605073113] [2023-08-30 19:40:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:07,337 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 19:40:07,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:07,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605073113] [2023-08-30 19:40:07,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605073113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:07,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047953123] [2023-08-30 19:40:07,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:40:07,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:07,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:07,341 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 19:40:07,365 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 19:40:07,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:40:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:40:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:07,662 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 19:40:07,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:08,006 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 19:40:08,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 249 [2023-08-30 19:40:08,150 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 19:40:08,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047953123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:08,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:08,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 19:40:08,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413340617] [2023-08-30 19:40:08,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:08,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:40:08,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:40:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:40:08,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 759 [2023-08-30 19:40:08,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 380 transitions, 6523 flow. Second operand has 13 states, 13 states have (on average 292.7692307692308) internal successors, (3806), 13 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:08,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 759 [2023-08-30 19:40:08,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:08,775 INFO L130 PetriNetUnfolder]: 588/1107 cut-off events. [2023-08-30 19:40:08,776 INFO L131 PetriNetUnfolder]: For 9467/9467 co-relation queries the response was YES. [2023-08-30 19:40:08,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8954 conditions, 1107 events. 588/1107 cut-off events. For 9467/9467 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5910 event pairs, 106 based on Foata normal form. 96/1203 useless extension candidates. Maximal degree in co-relation 8900. Up to 296 conditions per place. [2023-08-30 19:40:08,784 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 221 selfloop transitions, 77 changer transitions 29/327 dead transitions. [2023-08-30 19:40:08,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 327 transitions, 6156 flow [2023-08-30 19:40:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:40:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:40:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2371 transitions. [2023-08-30 19:40:08,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904808959156785 [2023-08-30 19:40:08,803 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2371 transitions. [2023-08-30 19:40:08,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2371 transitions. [2023-08-30 19:40:08,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:08,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2371 transitions. [2023-08-30 19:40:08,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 296.375) internal successors, (2371), 8 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 759.0) internal successors, (6831), 9 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,810 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 759.0) internal successors, (6831), 9 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,810 INFO L175 Difference]: Start difference. First operand has 202 places, 380 transitions, 6523 flow. Second operand 8 states and 2371 transitions. [2023-08-30 19:40:08,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 327 transitions, 6156 flow [2023-08-30 19:40:08,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 327 transitions, 5841 flow, removed 50 selfloop flow, removed 12 redundant places. [2023-08-30 19:40:08,888 INFO L231 Difference]: Finished difference. Result has 193 places, 282 transitions, 4919 flow [2023-08-30 19:40:08,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4919, PETRI_PLACES=193, PETRI_TRANSITIONS=282} [2023-08-30 19:40:08,889 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 173 predicate places. [2023-08-30 19:40:08,889 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 282 transitions, 4919 flow [2023-08-30 19:40:08,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 292.7692307692308) internal successors, (3806), 13 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:08,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:08,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:08,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:09,096 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,SelfDestructingSolverStorable15 [2023-08-30 19:40:09,097 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 19:40:09,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1019998734, now seen corresponding path program 11 times [2023-08-30 19:40:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98210059] [2023-08-30 19:40:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:09,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:09,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98210059] [2023-08-30 19:40:09,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98210059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:09,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481575638] [2023-08-30 19:40:09,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:40:09,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:09,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:09,245 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 19:40:09,248 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 19:40:09,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:40:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:09,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:40:09,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:09,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:09,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2023-08-30 19:40:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:09,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481575638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:09,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:09,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 19:40:09,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373983301] [2023-08-30 19:40:09,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:09,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:40:09,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:09,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:40:09,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:40:09,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 759 [2023-08-30 19:40:09,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 282 transitions, 4919 flow. Second operand has 12 states, 12 states have (on average 301.5833333333333) internal successors, (3619), 12 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:09,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:09,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 759 [2023-08-30 19:40:09,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:10,110 INFO L130 PetriNetUnfolder]: 221/415 cut-off events. [2023-08-30 19:40:10,110 INFO L131 PetriNetUnfolder]: For 2697/2697 co-relation queries the response was YES. [2023-08-30 19:40:10,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 415 events. 221/415 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1546 event pairs, 64 based on Foata normal form. 15/430 useless extension candidates. Maximal degree in co-relation 2866. Up to 295 conditions per place. [2023-08-30 19:40:10,114 INFO L137 encePairwiseOnDemand]: 753/759 looper letters, 107 selfloop transitions, 11 changer transitions 14/132 dead transitions. [2023-08-30 19:40:10,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 132 transitions, 1978 flow [2023-08-30 19:40:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:40:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:40:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2129 transitions. [2023-08-30 19:40:10,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007152268021833 [2023-08-30 19:40:10,117 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2129 transitions. [2023-08-30 19:40:10,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2129 transitions. [2023-08-30 19:40:10,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:10,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2129 transitions. [2023-08-30 19:40:10,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 304.14285714285717) internal successors, (2129), 7 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:10,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 759.0) internal successors, (6072), 8 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:10,122 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 759.0) internal successors, (6072), 8 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:10,122 INFO L175 Difference]: Start difference. First operand has 193 places, 282 transitions, 4919 flow. Second operand 7 states and 2129 transitions. [2023-08-30 19:40:10,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 132 transitions, 1978 flow [2023-08-30 19:40:10,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 132 transitions, 1819 flow, removed 2 selfloop flow, removed 25 redundant places. [2023-08-30 19:40:10,139 INFO L231 Difference]: Finished difference. Result has 127 places, 113 transitions, 1437 flow [2023-08-30 19:40:10,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1437, PETRI_PLACES=127, PETRI_TRANSITIONS=113} [2023-08-30 19:40:10,140 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 107 predicate places. [2023-08-30 19:40:10,140 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 113 transitions, 1437 flow [2023-08-30 19:40:10,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 301.5833333333333) internal successors, (3619), 12 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:10,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:10,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:10,149 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 19:40:10,349 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,SelfDestructingSolverStorable16 [2023-08-30 19:40:10,349 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 19:40:10,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1590715580, now seen corresponding path program 12 times [2023-08-30 19:40:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:10,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634592830] [2023-08-30 19:40:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:10,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:24,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:24,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634592830] [2023-08-30 19:40:24,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634592830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:24,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405694739] [2023-08-30 19:40:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:40:24,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:24,352 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 19:40:24,354 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 19:40:24,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:40:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:24,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-30 19:40:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:24,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:40:24,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:40:24,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:40:25,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:40:25,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 154 [2023-08-30 19:40:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:25,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:40:33,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405694739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:33,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:33,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 35 [2023-08-30 19:40:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571635363] [2023-08-30 19:40:33,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:33,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 19:40:33,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 19:40:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1098, Unknown=2, NotChecked=0, Total=1260 [2023-08-30 19:40:40,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 759 [2023-08-30 19:40:40,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 113 transitions, 1437 flow. Second operand has 36 states, 36 states have (on average 232.58333333333334) internal successors, (8373), 36 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:40,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:40,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 759 [2023-08-30 19:40:40,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:50,252 WARN L222 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 223 DAG size of output: 175 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:41:00,763 WARN L222 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 236 DAG size of output: 188 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:41:13,138 INFO L130 PetriNetUnfolder]: 536/937 cut-off events. [2023-08-30 19:41:13,138 INFO L131 PetriNetUnfolder]: For 5187/5187 co-relation queries the response was YES. [2023-08-30 19:41:13,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6389 conditions, 937 events. 536/937 cut-off events. For 5187/5187 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4326 event pairs, 13 based on Foata normal form. 1/938 useless extension candidates. Maximal degree in co-relation 6345. Up to 355 conditions per place. [2023-08-30 19:41:13,144 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 173 selfloop transitions, 203 changer transitions 4/380 dead transitions. [2023-08-30 19:41:13,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 380 transitions, 4734 flow [2023-08-30 19:41:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 19:41:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 19:41:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 11090 transitions. [2023-08-30 19:41:13,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31087937655930253 [2023-08-30 19:41:13,167 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 11090 transitions. [2023-08-30 19:41:13,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 11090 transitions. [2023-08-30 19:41:13,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:13,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 11090 transitions. [2023-08-30 19:41:13,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 235.95744680851064) internal successors, (11090), 47 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:13,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 759.0) internal successors, (36432), 48 states have internal predecessors, (36432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:13,199 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 759.0) internal successors, (36432), 48 states have internal predecessors, (36432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:13,199 INFO L175 Difference]: Start difference. First operand has 127 places, 113 transitions, 1437 flow. Second operand 47 states and 11090 transitions. [2023-08-30 19:41:13,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 380 transitions, 4734 flow [2023-08-30 19:41:13,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 380 transitions, 4698 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 19:41:13,237 INFO L231 Difference]: Finished difference. Result has 159 places, 261 transitions, 3993 flow [2023-08-30 19:41:13,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3993, PETRI_PLACES=159, PETRI_TRANSITIONS=261} [2023-08-30 19:41:13,238 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 139 predicate places. [2023-08-30 19:41:13,238 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 261 transitions, 3993 flow [2023-08-30 19:41:13,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 232.58333333333334) internal successors, (8373), 36 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:13,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:13,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:13,248 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 19:41:13,446 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,SelfDestructingSolverStorable17 [2023-08-30 19:41:13,446 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 19:41:13,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:13,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2057728334, now seen corresponding path program 13 times [2023-08-30 19:41:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:13,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221843081] [2023-08-30 19:41:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:17,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221843081] [2023-08-30 19:41:17,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221843081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:17,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798729379] [2023-08-30 19:41:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:41:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:17,017 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 19:41:17,021 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 19:41:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:17,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-30 19:41:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:18,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:41:18,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 154 [2023-08-30 19:41:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:18,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:22,809 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-30 19:41:22,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 469 treesize of output 201 [2023-08-30 19:41:23,850 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-08-30 19:41:23,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 940 treesize of output 1 [2023-08-30 19:41:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:41:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798729379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:24,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:24,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 33 [2023-08-30 19:41:24,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722377812] [2023-08-30 19:41:24,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 19:41:24,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 19:41:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 19:41:30,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 759 [2023-08-30 19:41:30,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 261 transitions, 3993 flow. Second operand has 34 states, 34 states have (on average 267.6764705882353) internal successors, (9101), 34 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:30,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:30,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 759 [2023-08-30 19:41:30,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:40,937 INFO L130 PetriNetUnfolder]: 764/1313 cut-off events. [2023-08-30 19:41:40,937 INFO L131 PetriNetUnfolder]: For 9083/9083 co-relation queries the response was YES. [2023-08-30 19:41:40,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10132 conditions, 1313 events. 764/1313 cut-off events. For 9083/9083 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6408 event pairs, 13 based on Foata normal form. 5/1318 useless extension candidates. Maximal degree in co-relation 10082. Up to 424 conditions per place. [2023-08-30 19:41:40,945 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 140 selfloop transitions, 311 changer transitions 13/464 dead transitions. [2023-08-30 19:41:40,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 464 transitions, 7054 flow [2023-08-30 19:41:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 19:41:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 19:41:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 11125 transitions. [2023-08-30 19:41:40,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574986342748803 [2023-08-30 19:41:40,956 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 11125 transitions. [2023-08-30 19:41:40,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 11125 transitions. [2023-08-30 19:41:40,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:40,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 11125 transitions. [2023-08-30 19:41:40,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 271.3414634146341) internal successors, (11125), 41 states have internal predecessors, (11125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:40,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 759.0) internal successors, (31878), 42 states have internal predecessors, (31878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:40,984 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 759.0) internal successors, (31878), 42 states have internal predecessors, (31878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:40,985 INFO L175 Difference]: Start difference. First operand has 159 places, 261 transitions, 3993 flow. Second operand 41 states and 11125 transitions. [2023-08-30 19:41:40,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 464 transitions, 7054 flow [2023-08-30 19:41:41,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 464 transitions, 6611 flow, removed 121 selfloop flow, removed 12 redundant places. [2023-08-30 19:41:41,058 INFO L231 Difference]: Finished difference. Result has 197 places, 372 transitions, 6390 flow [2023-08-30 19:41:41,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6390, PETRI_PLACES=197, PETRI_TRANSITIONS=372} [2023-08-30 19:41:41,059 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 177 predicate places. [2023-08-30 19:41:41,059 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 372 transitions, 6390 flow [2023-08-30 19:41:41,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 267.6764705882353) internal successors, (9101), 34 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:41,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:41,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:41,071 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 19:41:41,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:41,266 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 19:41:41,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1013182084, now seen corresponding path program 14 times [2023-08-30 19:41:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086514267] [2023-08-30 19:41:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:41,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:43:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:43:35,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:43:35,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086514267] [2023-08-30 19:43:35,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086514267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:43:35,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750101776] [2023-08-30 19:43:35,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:43:35,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:43:35,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:43:35,188 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 19:43:35,190 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 19:43:35,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:43:35,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:43:35,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 19:43:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:43:36,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:43:36,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 180 [2023-08-30 19:43:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:43:36,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:43:39,637 INFO L321 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-08-30 19:43:39,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 997 treesize of output 539 [2023-08-30 19:43:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:43:41,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750101776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:43:41,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:43:41,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-08-30 19:43:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085011325] [2023-08-30 19:43:41,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:43:41,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:43:41,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:43:41,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:43:41,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:43:47,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 759 [2023-08-30 19:43:47,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 372 transitions, 6390 flow. Second operand has 32 states, 32 states have (on average 268.71875) internal successors, (8599), 32 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:47,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:43:47,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 759 [2023-08-30 19:43:47,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:44:05,833 INFO L130 PetriNetUnfolder]: 1237/2173 cut-off events. [2023-08-30 19:44:05,833 INFO L131 PetriNetUnfolder]: For 18900/18900 co-relation queries the response was YES. [2023-08-30 19:44:05,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17718 conditions, 2173 events. 1237/2173 cut-off events. For 18900/18900 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12170 event pairs, 21 based on Foata normal form. 17/2190 useless extension candidates. Maximal degree in co-relation 17659. Up to 696 conditions per place. [2023-08-30 19:44:05,849 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 215 selfloop transitions, 540 changer transitions 22/777 dead transitions. [2023-08-30 19:44:05,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 777 transitions, 12981 flow [2023-08-30 19:44:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-30 19:44:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-30 19:44:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 19036 transitions. [2023-08-30 19:44:05,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582909843779409 [2023-08-30 19:44:05,866 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 19036 transitions. [2023-08-30 19:44:05,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 19036 transitions. [2023-08-30 19:44:05,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:44:05,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 19036 transitions. [2023-08-30 19:44:05,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 271.9428571428571) internal successors, (19036), 70 states have internal predecessors, (19036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:05,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 759.0) internal successors, (53889), 71 states have internal predecessors, (53889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:05,922 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 759.0) internal successors, (53889), 71 states have internal predecessors, (53889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:05,923 INFO L175 Difference]: Start difference. First operand has 197 places, 372 transitions, 6390 flow. Second operand 70 states and 19036 transitions. [2023-08-30 19:44:05,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 777 transitions, 12981 flow [2023-08-30 19:44:06,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 777 transitions, 12090 flow, removed 307 selfloop flow, removed 15 redundant places. [2023-08-30 19:44:06,173 INFO L231 Difference]: Finished difference. Result has 265 places, 613 transitions, 11488 flow [2023-08-30 19:44:06,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=11488, PETRI_PLACES=265, PETRI_TRANSITIONS=613} [2023-08-30 19:44:06,173 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 245 predicate places. [2023-08-30 19:44:06,173 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 613 transitions, 11488 flow [2023-08-30 19:44:06,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 268.71875) internal successors, (8599), 32 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:06,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:44:06,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:44:06,180 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 19:44:06,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:44:06,380 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 19:44:06,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:44:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1040887714, now seen corresponding path program 15 times [2023-08-30 19:44:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:44:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030165009] [2023-08-30 19:44:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:44:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:44:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:44:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:08,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:44:08,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030165009] [2023-08-30 19:44:08,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030165009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:44:08,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697553708] [2023-08-30 19:44:08,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:44:08,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:44:08,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:44:08,311 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 19:44:08,312 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 19:44:08,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:44:08,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:44:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 19:44:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:44:08,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:44:08,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:44:08,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:44:09,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:44:09,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 191 [2023-08-30 19:44:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:44:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:44:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697553708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:44:20,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:44:20,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 35 [2023-08-30 19:44:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176206543] [2023-08-30 19:44:20,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:44:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 19:44:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:44:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 19:44:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1032, Unknown=2, NotChecked=0, Total=1260 [2023-08-30 19:44:22,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 759 [2023-08-30 19:44:22,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 613 transitions, 11488 flow. Second operand has 36 states, 36 states have (on average 232.52777777777777) internal successors, (8371), 36 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:22,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:44:22,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 759 [2023-08-30 19:44:22,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:45:09,012 WARN L222 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 246 DAG size of output: 240 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:45:50,062 INFO L130 PetriNetUnfolder]: 1611/2783 cut-off events. [2023-08-30 19:45:50,062 INFO L131 PetriNetUnfolder]: For 24435/24435 co-relation queries the response was YES. [2023-08-30 19:45:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24652 conditions, 2783 events. 1611/2783 cut-off events. For 24435/24435 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15843 event pairs, 17 based on Foata normal form. 8/2791 useless extension candidates. Maximal degree in co-relation 24582. Up to 874 conditions per place. [2023-08-30 19:45:50,083 INFO L137 encePairwiseOnDemand]: 748/759 looper letters, 219 selfloop transitions, 750 changer transitions 45/1014 dead transitions. [2023-08-30 19:45:50,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1014 transitions, 18921 flow [2023-08-30 19:45:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-30 19:45:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-30 19:45:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 21437 transitions. [2023-08-30 19:45:50,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103707886316582 [2023-08-30 19:45:50,097 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 21437 transitions. [2023-08-30 19:45:50,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 21437 transitions. [2023-08-30 19:45:50,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:45:50,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 21437 transitions. [2023-08-30 19:45:50,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 235.57142857142858) internal successors, (21437), 91 states have internal predecessors, (21437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:50,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 759.0) internal successors, (69828), 92 states have internal predecessors, (69828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:50,165 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 759.0) internal successors, (69828), 92 states have internal predecessors, (69828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:50,165 INFO L175 Difference]: Start difference. First operand has 265 places, 613 transitions, 11488 flow. Second operand 91 states and 21437 transitions. [2023-08-30 19:45:50,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1014 transitions, 18921 flow [2023-08-30 19:45:50,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1014 transitions, 17914 flow, removed 365 selfloop flow, removed 19 redundant places. [2023-08-30 19:45:50,529 INFO L231 Difference]: Finished difference. Result has 343 places, 826 transitions, 16614 flow [2023-08-30 19:45:50,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=10696, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=16614, PETRI_PLACES=343, PETRI_TRANSITIONS=826} [2023-08-30 19:45:50,529 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2023-08-30 19:45:50,530 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 826 transitions, 16614 flow [2023-08-30 19:45:50,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 232.52777777777777) internal successors, (8371), 36 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:45:50,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:45:50,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:45:50,535 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 19:45:50,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:45:50,731 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 19:45:50,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:45:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 220455428, now seen corresponding path program 16 times [2023-08-30 19:45:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:45:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699031137] [2023-08-30 19:45:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:45:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:45:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:45:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:45:52,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:45:52,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699031137] [2023-08-30 19:45:52,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699031137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:45:52,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373319054] [2023-08-30 19:45:52,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:45:52,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:45:52,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:45:52,290 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 19:45:52,292 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 19:45:52,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:45:52,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:45:52,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 19:45:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:45:52,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 19:45:52,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 19:45:52,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 19:45:52,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:45:52,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:45:53,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:45:53,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 202 [2023-08-30 19:45:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:45:53,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:46:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:46:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373319054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:46:08,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:46:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-30 19:46:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249886893] [2023-08-30 19:46:08,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:46:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 19:46:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:46:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 19:46:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=870, Unknown=4, NotChecked=0, Total=1056 [2023-08-30 19:46:16,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 759 [2023-08-30 19:46:16,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 826 transitions, 16614 flow. Second operand has 33 states, 33 states have (on average 232.6060606060606) internal successors, (7676), 33 states have internal predecessors, (7676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:16,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:46:16,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 759 [2023-08-30 19:46:16,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:46:22,927 WARN L222 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 323 DAG size of output: 308 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:46:34,122 WARN L222 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 309 DAG size of output: 298 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:47:02,023 WARN L222 SmtUtils]: Spent 17.66s on a formula simplification. DAG size of input: 306 DAG size of output: 282 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:47:12,426 WARN L222 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 300 DAG size of output: 297 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:47:14,482 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-08-30 19:47:14,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-08-30 19:47:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 19:47:14,488 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 19:47:14,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:47:14,685 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:483) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfoldingHelper(PetriNetUnfolder.java:209) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfolding(PetriNetUnfolder.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:129) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:125) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 59 more [2023-08-30 19:47:14,689 INFO L158 Benchmark]: Toolchain (without parser) took 504294.01ms. Allocated memory was 69.2MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 36.4MB in the beginning and 840.2MB in the end (delta: -803.8MB). Peak memory consumption was 512.2MB. Max. memory is 16.1GB. [2023-08-30 19:47:14,689 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 32.0MB in the beginning and 31.9MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 19:47:14,689 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.90ms. Allocated memory is still 69.2MB. Free memory was 36.3MB in the beginning and 40.3MB in the end (delta: -4.0MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-08-30 19:47:14,689 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.54ms. Allocated memory is still 69.2MB. Free memory was 40.3MB in the beginning and 37.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 19:47:14,690 INFO L158 Benchmark]: Boogie Preprocessor took 28.44ms. Allocated memory is still 69.2MB. Free memory was 37.6MB in the beginning and 35.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 19:47:14,690 INFO L158 Benchmark]: RCFGBuilder took 577.40ms. Allocated memory is still 69.2MB. Free memory was 35.6MB in the beginning and 29.2MB in the end (delta: 6.4MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2023-08-30 19:47:14,690 INFO L158 Benchmark]: TraceAbstraction took 503416.24ms. Allocated memory was 69.2MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 46.6MB in the beginning and 840.2MB in the end (delta: -793.6MB). Peak memory consumption was 520.7MB. Max. memory is 16.1GB. [2023-08-30 19:47:14,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 32.0MB in the beginning and 31.9MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.90ms. Allocated memory is still 69.2MB. Free memory was 36.3MB in the beginning and 40.3MB in the end (delta: -4.0MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.54ms. Allocated memory is still 69.2MB. Free memory was 40.3MB in the beginning and 37.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.44ms. Allocated memory is still 69.2MB. Free memory was 37.6MB in the beginning and 35.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 577.40ms. Allocated memory is still 69.2MB. Free memory was 35.6MB in the beginning and 29.2MB in the end (delta: 6.4MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * TraceAbstraction took 503416.24ms. Allocated memory was 69.2MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 46.6MB in the beginning and 840.2MB in the end (delta: -793.6MB). Peak memory consumption was 520.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.1s, 315 PlacesBefore, 20 PlacesAfterwards, 336 TransitionsBefore, 17 TransitionsAfterwards, 25652 CoEnabledTransitionPairs, 8 FixpointIterations, 100 TrivialSequentialCompositions, 198 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 75 ConcurrentYvCompositions, 24 ChoiceCompositions, 413 TotalNumberOfCompositions, 22140 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 21832, independent: 21808, independent conditional: 0, independent unconditional: 21808, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 15314, independent: 15300, independent conditional: 0, independent unconditional: 15300, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 21832, independent: 6508, independent conditional: 0, independent unconditional: 6508, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 15314, unknown conditional: 0, unknown unconditional: 15314] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/parallel-misc-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --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 19:47:16,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:47:16,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:47:16,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:47:16,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:47:16,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:47:16,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:47:16,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:47:16,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:47:16,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:47:16,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:47:16,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:47:16,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:47:16,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:47:16,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:47:16,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:47:16,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:47:16,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:47:16,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:47:16,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:47:16,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:47:16,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:47:16,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:47:16,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:47:16,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:47:16,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:47:16,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:47:16,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:47:16,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:47:16,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:47:16,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:47:16,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:47:16,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:47:16,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:47:16,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:47:16,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:47:16,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:47:16,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:47:16,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:47:16,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:47:16,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:47:16,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-08-30 19:47:16,490 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:47:16,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:47:16,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:47:16,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:47:16,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:47:16,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:47:16,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:47:16,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:47:16,494 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:47:16,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:47:16,495 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:47:16,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:47:16,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:47:16,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:47:16,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:47:16,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:47:16,496 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 19:47:16,496 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 19:47:16,496 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 19:47:16,496 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:47:16,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:47:16,497 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:47:16,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:47:16,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:47:16,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:47:16,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:47:16,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:47:16,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:47:16,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:47:16,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:47:16,498 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 19:47:16,499 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 19:47:16,499 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:47:16,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:47:16,499 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:47:16,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:47:16,500 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 19:47:16,500 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:47:16,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:47:16,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:47:16,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:47:16,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:47:16,819 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:47:16,819 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:47:16,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-08-30 19:47:17,898 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:47:18,084 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:47:18,085 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-08-30 19:47:18,091 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb45920d/262cd86016284b1e8a5bcf92e67bf58f/FLAGd1de7dac4 [2023-08-30 19:47:18,104 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb45920d/262cd86016284b1e8a5bcf92e67bf58f [2023-08-30 19:47:18,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:47:18,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:47:18,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:47:18,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:47:18,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:47:18,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2967a188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18, skipping insertion in model container [2023-08-30 19:47:18,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:47:18,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:47:18,266 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/parallel-misc-1.wvr.c[2755,2768] [2023-08-30 19:47:18,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:47:18,303 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 19:47:18,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:47:18,325 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/parallel-misc-1.wvr.c[2755,2768] [2023-08-30 19:47:18,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:47:18,340 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:47:18,359 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/parallel-misc-1.wvr.c[2755,2768] [2023-08-30 19:47:18,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:47:18,375 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:47:18,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18 WrapperNode [2023-08-30 19:47:18,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:47:18,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:47:18,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:47:18,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:47:18,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,415 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 269 [2023-08-30 19:47:18,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:47:18,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:47:18,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:47:18,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:47:18,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:47:18,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:47:18,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:47:18,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:47:18,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (1/1) ... [2023-08-30 19:47:18,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:47:18,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:47:18,500 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 19:47:18,524 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 19:47:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:47:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:47:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:47:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:47:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:47:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 19:47:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:47:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:47:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 19:47:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:47:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:47:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:47:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 19:47:18,540 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 19:47:18,681 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:47:18,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:47:19,172 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:47:19,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:47:19,182 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:47:19,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:47:19 BoogieIcfgContainer [2023-08-30 19:47:19,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:47:19,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:47:19,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:47:19,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:47:19,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:47:18" (1/3) ... [2023-08-30 19:47:19,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692b656d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:47:19, skipping insertion in model container [2023-08-30 19:47:19,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:47:18" (2/3) ... [2023-08-30 19:47:19,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692b656d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:47:19, skipping insertion in model container [2023-08-30 19:47:19,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:47:19" (3/3) ... [2023-08-30 19:47:19,194 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-08-30 19:47:19,201 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:47:19,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:47:19,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:47:19,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:47:19,377 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:47:19,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 328 transitions, 672 flow [2023-08-30 19:47:19,573 INFO L130 PetriNetUnfolder]: 28/326 cut-off events. [2023-08-30 19:47:19,573 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:47:19,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 326 events. 28/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 743 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 215. Up to 2 conditions per place. [2023-08-30 19:47:19,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 328 transitions, 672 flow [2023-08-30 19:47:19,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 318 transitions, 648 flow [2023-08-30 19:47:19,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:47:19,622 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 318 transitions, 648 flow [2023-08-30 19:47:19,624 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 318 transitions, 648 flow [2023-08-30 19:47:19,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 318 transitions, 648 flow [2023-08-30 19:47:19,705 INFO L130 PetriNetUnfolder]: 28/318 cut-off events. [2023-08-30 19:47:19,705 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:47:19,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 318 events. 28/318 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 740 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 215. Up to 2 conditions per place. [2023-08-30 19:47:19,722 INFO L119 LiptonReduction]: Number of co-enabled transitions 23868 [2023-08-30 19:47:37,816 INFO L134 LiptonReduction]: Checked pairs total: 20573 [2023-08-30 19:47:37,816 INFO L136 LiptonReduction]: Total number of compositions: 394 [2023-08-30 19:47:37,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:47:37,842 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;@3053fa8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:47:37,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:47:37,853 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-30 19:47:37,854 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:47:37,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:47:37,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:47:37,855 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 19:47:37,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:47:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1111339902, now seen corresponding path program 1 times [2023-08-30 19:47:37,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:47:37,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147446990] [2023-08-30 19:47:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:47:37,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:37,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:47:37,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:47:37,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 19:47:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:47:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:47:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:47:38,340 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 19:47:38,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:47:38,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:47:38,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147446990] [2023-08-30 19:47:38,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147446990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:47:38,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:47:38,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:47:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400815555] [2023-08-30 19:47:38,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:47:38,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:47:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:47:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:47:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:47:38,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 722 [2023-08-30 19:47:38,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 288.4) internal successors, (1442), 5 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:47:38,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 722 [2023-08-30 19:47:38,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:47:38,750 INFO L130 PetriNetUnfolder]: 99/168 cut-off events. [2023-08-30 19:47:38,750 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 19:47:38,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 168 events. 99/168 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 472 event pairs, 15 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 294. Up to 91 conditions per place. [2023-08-30 19:47:38,753 INFO L137 encePairwiseOnDemand]: 716/722 looper letters, 32 selfloop transitions, 10 changer transitions 1/43 dead transitions. [2023-08-30 19:47:38,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 43 transitions, 199 flow [2023-08-30 19:47:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:47:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:47:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2023-08-30 19:47:38,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083102493074792 [2023-08-30 19:47:38,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2023-08-30 19:47:38,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2023-08-30 19:47:38,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:47:38,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2023-08-30 19:47:38,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 722.0) internal successors, (4332), 6 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 722.0) internal successors, (4332), 6 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,801 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 5 states and 1474 transitions. [2023-08-30 19:47:38,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 43 transitions, 199 flow [2023-08-30 19:47:38,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:47:38,807 INFO L231 Difference]: Finished difference. Result has 23 places, 25 transitions, 99 flow [2023-08-30 19:47:38,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=25} [2023-08-30 19:47:38,813 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-30 19:47:38,813 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 25 transitions, 99 flow [2023-08-30 19:47:38,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 288.4) internal successors, (1442), 5 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:38,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:47:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:47:38,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 19:47:39,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:39,029 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 19:47:39,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:47:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1106878650, now seen corresponding path program 1 times [2023-08-30 19:47:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:47:39,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061876151] [2023-08-30 19:47:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:47:39,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:39,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:47:39,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:47:39,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 19:47:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:47:39,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:47:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:47:39,284 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 19:47:39,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:47:39,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:47:39,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061876151] [2023-08-30 19:47:39,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061876151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:47:39,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:47:39,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:47:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615502744] [2023-08-30 19:47:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:47:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:47:39,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:47:39,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:47:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:47:39,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 722 [2023-08-30 19:47:39,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 25 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:39,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:47:39,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 722 [2023-08-30 19:47:39,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:47:39,642 INFO L130 PetriNetUnfolder]: 96/175 cut-off events. [2023-08-30 19:47:39,642 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2023-08-30 19:47:39,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 175 events. 96/175 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 524 event pairs, 9 based on Foata normal form. 6/169 useless extension candidates. Maximal degree in co-relation 206. Up to 115 conditions per place. [2023-08-30 19:47:39,643 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 36 selfloop transitions, 6 changer transitions 8/50 dead transitions. [2023-08-30 19:47:39,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 283 flow [2023-08-30 19:47:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:47:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:47:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1783 transitions. [2023-08-30 19:47:39,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115881809787627 [2023-08-30 19:47:39,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1783 transitions. [2023-08-30 19:47:39,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1783 transitions. [2023-08-30 19:47:39,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:47:39,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1783 transitions. [2023-08-30 19:47:39,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.1666666666667) internal successors, (1783), 6 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:39,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:39,661 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:39,661 INFO L175 Difference]: Start difference. First operand has 23 places, 25 transitions, 99 flow. Second operand 6 states and 1783 transitions. [2023-08-30 19:47:39,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 283 flow [2023-08-30 19:47:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 50 transitions, 281 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 19:47:39,664 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 133 flow [2023-08-30 19:47:39,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-30 19:47:39,664 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-08-30 19:47:39,665 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 133 flow [2023-08-30 19:47:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:39,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:47:39,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:47:39,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:47:39,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:39,876 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 19:47:39,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:47:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash -409199040, now seen corresponding path program 2 times [2023-08-30 19:47:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:47:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593432757] [2023-08-30 19:47:39,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:47:39,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:47:39,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:47:39,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 19:47:39,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:47:39,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:47:39,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:47:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:47:40,075 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 19:47:40,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:47:40,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:47:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593432757] [2023-08-30 19:47:40,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593432757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:47:40,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:47:40,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:47:40,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141315225] [2023-08-30 19:47:40,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:47:40,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:47:40,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:47:40,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:47:40,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:47:40,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 722 [2023-08-30 19:47:40,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:40,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:47:40,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 722 [2023-08-30 19:47:40,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:47:40,406 INFO L130 PetriNetUnfolder]: 82/143 cut-off events. [2023-08-30 19:47:40,406 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-08-30 19:47:40,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 143 events. 82/143 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 380 event pairs, 8 based on Foata normal form. 8/147 useless extension candidates. Maximal degree in co-relation 265. Up to 90 conditions per place. [2023-08-30 19:47:40,408 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 30 selfloop transitions, 8 changer transitions 5/43 dead transitions. [2023-08-30 19:47:40,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 273 flow [2023-08-30 19:47:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:47:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:47:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1778 transitions. [2023-08-30 19:47:40,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41043397968605727 [2023-08-30 19:47:40,413 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1778 transitions. [2023-08-30 19:47:40,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1778 transitions. [2023-08-30 19:47:40,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:47:40,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1778 transitions. [2023-08-30 19:47:40,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 296.3333333333333) internal successors, (1778), 6 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:40,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:40,426 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:40,426 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 133 flow. Second operand 6 states and 1778 transitions. [2023-08-30 19:47:40,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 273 flow [2023-08-30 19:47:40,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 259 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 19:47:40,429 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 150 flow [2023-08-30 19:47:40,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 19:47:40,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2023-08-30 19:47:40,430 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 150 flow [2023-08-30 19:47:40,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:40,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:47:40,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:47:40,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:47:40,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:40,641 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 19:47:40,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:47:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash -290858005, now seen corresponding path program 1 times [2023-08-30 19:47:40,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:47:40,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573269126] [2023-08-30 19:47:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:47:40,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:47:40,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:47:40,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 19:47:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:47:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 19:47:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:47:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:47:40,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:47:40,911 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 19:47:40,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:47:40,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573269126] [2023-08-30 19:47:40,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573269126] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:47:40,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:47:40,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 19:47:40,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533054583] [2023-08-30 19:47:40,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:47:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:47:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:47:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:47:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:47:40,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 722 [2023-08-30 19:47:40,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:40,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:47:40,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 722 [2023-08-30 19:47:40,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:47:41,220 INFO L130 PetriNetUnfolder]: 105/181 cut-off events. [2023-08-30 19:47:41,220 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-08-30 19:47:41,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 181 events. 105/181 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 499 event pairs, 2 based on Foata normal form. 8/185 useless extension candidates. Maximal degree in co-relation 327. Up to 107 conditions per place. [2023-08-30 19:47:41,222 INFO L137 encePairwiseOnDemand]: 717/722 looper letters, 38 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2023-08-30 19:47:41,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 321 flow [2023-08-30 19:47:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:47:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:47:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-08-30 19:47:41,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41066481994459836 [2023-08-30 19:47:41,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-08-30 19:47:41,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-08-30 19:47:41,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:47:41,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-08-30 19:47:41,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 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 19:47:41,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,234 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 150 flow. Second operand 4 states and 1186 transitions. [2023-08-30 19:47:41,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 321 flow [2023-08-30 19:47:41,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 297 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-30 19:47:41,237 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 198 flow [2023-08-30 19:47:41,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-08-30 19:47:41,238 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-30 19:47:41,238 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 198 flow [2023-08-30 19:47:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:47:41,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:47:41,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:47:41,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:41,449 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 19:47:41,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:47:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1548239333, now seen corresponding path program 1 times [2023-08-30 19:47:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:47:41,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459187204] [2023-08-30 19:47:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:47:41,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:41,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:47:41,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:47:41,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 19:47:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:47:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:47:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:47:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:47:41,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:47:41,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:47:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459187204] [2023-08-30 19:47:41,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459187204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:47:41,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:47:41,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:47:41,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586575052] [2023-08-30 19:47:41,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:47:41,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:47:41,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:47:41,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:47:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:47:41,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 722 [2023-08-30 19:47:41,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 295.75) internal successors, (1183), 4 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:47:41,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 722 [2023-08-30 19:47:41,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:47:41,956 INFO L130 PetriNetUnfolder]: 112/200 cut-off events. [2023-08-30 19:47:41,956 INFO L131 PetriNetUnfolder]: For 374/374 co-relation queries the response was YES. [2023-08-30 19:47:41,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 200 events. 112/200 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 545 event pairs, 49 based on Foata normal form. 10/206 useless extension candidates. Maximal degree in co-relation 374. Up to 182 conditions per place. [2023-08-30 19:47:41,958 INFO L137 encePairwiseOnDemand]: 718/722 looper letters, 32 selfloop transitions, 2 changer transitions 10/44 dead transitions. [2023-08-30 19:47:41,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 343 flow [2023-08-30 19:47:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:47:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:47:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1193 transitions. [2023-08-30 19:47:41,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130886426592798 [2023-08-30 19:47:41,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1193 transitions. [2023-08-30 19:47:41,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1193 transitions. [2023-08-30 19:47:41,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:47:41,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1193 transitions. [2023-08-30 19:47:41,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,970 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 198 flow. Second operand 4 states and 1193 transitions. [2023-08-30 19:47:41,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 343 flow [2023-08-30 19:47:41,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 19:47:41,973 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 214 flow [2023-08-30 19:47:41,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-30 19:47:41,974 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-08-30 19:47:41,974 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 214 flow [2023-08-30 19:47:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 295.75) internal successors, (1183), 4 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:41,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:47:41,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:47:41,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:47:42,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:42,185 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 19:47:42,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:47:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 909737418, now seen corresponding path program 1 times [2023-08-30 19:47:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:47:42,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976087833] [2023-08-30 19:47:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:47:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:47:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:47:42,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:47:42,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 19:47:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:47:42,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 19:47:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:47:42,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:47:42,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 131 [2023-08-30 19:47:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:47:43,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:47:47,240 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 19:47:47,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 70 [2023-08-30 19:47:47,990 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 19:47:47,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 81 [2023-08-30 19:47:49,289 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 19:47:49,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 397 treesize of output 165 [2023-08-30 19:48:57,965 WARN L222 SmtUtils]: Spent 55.85s on a formula simplification. DAG size of input: 526 DAG size of output: 14 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:48:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:48:58,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:48:58,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976087833] [2023-08-30 19:48:58,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976087833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:48:58,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:48:58,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-08-30 19:48:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625105416] [2023-08-30 19:48:58,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 19:48:58,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:48:58,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:48:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:48:58,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=117, Unknown=2, NotChecked=0, Total=156 [2023-08-30 19:48:59,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 722 [2023-08-30 19:48:59,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 214 flow. Second operand has 13 states, 13 states have (on average 249.30769230769232) internal successors, (3241), 13 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:48:59,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:48:59,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 722 [2023-08-30 19:48:59,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:49:01,985 INFO L130 PetriNetUnfolder]: 137/239 cut-off events. [2023-08-30 19:49:01,985 INFO L131 PetriNetUnfolder]: For 457/457 co-relation queries the response was YES. [2023-08-30 19:49:01,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 239 events. 137/239 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 732 event pairs, 11 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 959. Up to 164 conditions per place. [2023-08-30 19:49:01,987 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 43 selfloop transitions, 21 changer transitions 4/68 dead transitions. [2023-08-30 19:49:01,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 499 flow [2023-08-30 19:49:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:49:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:49:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2032 transitions. [2023-08-30 19:49:01,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3518005540166205 [2023-08-30 19:49:01,994 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2032 transitions. [2023-08-30 19:49:01,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2032 transitions. [2023-08-30 19:49:01,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:49:01,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2032 transitions. [2023-08-30 19:49:01,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:02,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:02,004 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:02,004 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 214 flow. Second operand 8 states and 2032 transitions. [2023-08-30 19:49:02,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 499 flow [2023-08-30 19:49:02,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 485 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 19:49:02,007 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 366 flow [2023-08-30 19:49:02,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=366, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-30 19:49:02,008 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-08-30 19:49:02,008 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 366 flow [2023-08-30 19:49:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 249.30769230769232) internal successors, (3241), 13 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:02,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:49:02,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:49:02,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:49:02,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:49:02,222 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 19:49:02,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:49:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash -804462780, now seen corresponding path program 2 times [2023-08-30 19:49:02,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:49:02,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116317631] [2023-08-30 19:49:02,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:49:02,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:49:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:49:02,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:49:02,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 19:49:02,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:49:02,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:49:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 19:49:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:49:03,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:49:03,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 131 [2023-08-30 19:49:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:49:04,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:49:08,329 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 19:49:08,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 455 treesize of output 328 [2023-08-30 19:49:42,338 WARN L222 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 561 DAG size of output: 14 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:49:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:49:42,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:49:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116317631] [2023-08-30 19:49:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116317631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:49:42,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:49:42,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 19:49:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146172144] [2023-08-30 19:49:42,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 19:49:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:49:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:49:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:49:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=92, Unknown=1, NotChecked=0, Total=132 [2023-08-30 19:49:44,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:49:46,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:49:48,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:49:50,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:49:53,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:49:55,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:49:57,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:49:59,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:01,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:03,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:05,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:07,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:09,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:11,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:13,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:16,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:18,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:20,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:22,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:24,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:26,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:28,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:30,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:32,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:34,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:37,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:50:37,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 722 [2023-08-30 19:50:37,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 366 flow. Second operand has 12 states, 12 states have (on average 249.5) internal successors, (2994), 12 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:37,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:50:37,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 722 [2023-08-30 19:50:37,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:50:39,338 INFO L130 PetriNetUnfolder]: 152/262 cut-off events. [2023-08-30 19:50:39,338 INFO L131 PetriNetUnfolder]: For 883/883 co-relation queries the response was YES. [2023-08-30 19:50:39,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 262 events. 152/262 cut-off events. For 883/883 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 819 event pairs, 11 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 1233. Up to 193 conditions per place. [2023-08-30 19:50:39,340 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 44 selfloop transitions, 23 changer transitions 4/71 dead transitions. [2023-08-30 19:50:39,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 630 flow [2023-08-30 19:50:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:50:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:50:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2032 transitions. [2023-08-30 19:50:39,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3518005540166205 [2023-08-30 19:50:39,348 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2032 transitions. [2023-08-30 19:50:39,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2032 transitions. [2023-08-30 19:50:39,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:50:39,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2032 transitions. [2023-08-30 19:50:39,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:39,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:39,361 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:39,361 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 366 flow. Second operand 8 states and 2032 transitions. [2023-08-30 19:50:39,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 630 flow [2023-08-30 19:50:39,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 580 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-08-30 19:50:39,365 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 434 flow [2023-08-30 19:50:39,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=434, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-30 19:50:39,366 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-30 19:50:39,366 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 434 flow [2023-08-30 19:50:39,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 249.5) internal successors, (2994), 12 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:39,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:50:39,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:50:39,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:50:39,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:50:39,578 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 19:50:39,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:50:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash -887579670, now seen corresponding path program 3 times [2023-08-30 19:50:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 19:50:39,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037006160] [2023-08-30 19:50:39,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:50:39,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 19:50:39,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 19:50:39,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 19:50:39,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 19:50:39,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:50:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:50:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 19:50:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:50:40,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:50:40,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 131 [2023-08-30 19:50:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:50:41,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:50:46,101 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 19:50:46,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 455 treesize of output 328 [2023-08-30 19:51:24,850 WARN L222 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 563 DAG size of output: 14 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:51:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:51:25,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 19:51:25,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037006160] [2023-08-30 19:51:25,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037006160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:51:25,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:51:25,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 19:51:25,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841448349] [2023-08-30 19:51:25,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 19:51:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:51:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 19:51:25,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:51:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=116, Unknown=1, NotChecked=0, Total=156 [2023-08-30 19:51:27,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:29,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:31,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:34,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:36,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:39,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:41,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:43,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:45,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:48,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:50,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:52,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:51:55,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15