./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-1.i --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/pthread/stack_longer-1.i -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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --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 16:21:28,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:21:28,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:21:28,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:21:28,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:21:28,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:21:28,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:21:28,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:21:28,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:21:28,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:21:28,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:21:28,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:21:28,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:21:28,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:21:28,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:21:28,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:21:28,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:21:28,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:21:28,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:21:28,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:21:28,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:21:28,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:21:28,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:21:28,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:21:28,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:21:28,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:21:28,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:21:28,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:21:28,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:21:28,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:21:28,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:21:28,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:21:28,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:21:28,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:21:28,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:21:28,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:21:28,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:21:28,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:21:28,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:21:28,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:21:28,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:21:28,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:21:28,735 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:21:28,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:21:28,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:21:28,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:21:28,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:21:28,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:21:28,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:21:28,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:21:28,738 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:21:28,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:21:28,739 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:21:28,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:21:28,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:21:28,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:21:28,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:21:28,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:21:28,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:21:28,741 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:21:28,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:21:28,741 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:21:28,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:21:28,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:21:28,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:21:28,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:21:28,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:21:28,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:21:28,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:21:28,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:21:28,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:21:28,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:21:28,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:21:28,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:21:28,744 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:21:28,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:21:28,744 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:21:28,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:21:29,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:21:29,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:21:29,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:21:29,073 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:21:29,073 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:21:29,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-30 16:21:30,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:21:30,542 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:21:30,542 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-30 16:21:30,561 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8658f442/c817093b0b2d4f50ae0ea907011d89af/FLAGaa4535435 [2023-08-30 16:21:30,572 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8658f442/c817093b0b2d4f50ae0ea907011d89af [2023-08-30 16:21:30,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:21:30,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:21:30,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:21:30,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:21:30,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:21:30,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:21:30" (1/1) ... [2023-08-30 16:21:30,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b17482b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:30, skipping insertion in model container [2023-08-30 16:21:30,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:21:30" (1/1) ... [2023-08-30 16:21:30,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:21:30,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:21:31,065 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-30 16:21:31,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:21:31,138 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:21:31,176 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-30 16:21:31,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:21:31,265 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:21:31,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31 WrapperNode [2023-08-30 16:21:31,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:21:31,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:21:31,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:21:31,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:21:31,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,334 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-30 16:21:31,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:21:31,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:21:31,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:21:31,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:21:31,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,397 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:21:31,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:21:31,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:21:31,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:21:31,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (1/1) ... [2023-08-30 16:21:31,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:21:31,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:31,450 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 16:21:31,472 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 16:21:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 16:21:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 16:21:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 16:21:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 16:21:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:21:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:21:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:21:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:21:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 16:21:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:21:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:21:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:21:31,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:21:31,491 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 16:21:31,640 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:21:31,642 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:21:31,854 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:21:31,862 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:21:31,862 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:21:31,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:31 BoogieIcfgContainer [2023-08-30 16:21:31,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:21:31,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:21:31,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:21:31,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:21:31,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:21:30" (1/3) ... [2023-08-30 16:21:31,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87317b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:21:31, skipping insertion in model container [2023-08-30 16:21:31,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:31" (2/3) ... [2023-08-30 16:21:31,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87317b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:21:31, skipping insertion in model container [2023-08-30 16:21:31,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:31" (3/3) ... [2023-08-30 16:21:31,883 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-08-30 16:21:31,890 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:21:31,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:21:31,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 16:21:31,899 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:21:32,023 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 16:21:32,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 332 flow [2023-08-30 16:21:32,151 INFO L130 PetriNetUnfolder]: 10/156 cut-off events. [2023-08-30 16:21:32,151 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:21:32,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 10/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 373 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-08-30 16:21:32,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 158 transitions, 332 flow [2023-08-30 16:21:32,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-08-30 16:21:32,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:21:32,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-08-30 16:21:32,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-08-30 16:21:32,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-08-30 16:21:32,215 INFO L130 PetriNetUnfolder]: 10/147 cut-off events. [2023-08-30 16:21:32,215 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:21:32,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-08-30 16:21:32,220 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-08-30 16:21:35,564 INFO L134 LiptonReduction]: Checked pairs total: 10082 [2023-08-30 16:21:35,564 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-30 16:21:35,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:21:35,582 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;@5738ac2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:21:35,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 16:21:35,586 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2023-08-30 16:21:35,586 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:21:35,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:35,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:21:35,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:35,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1684934246, now seen corresponding path program 1 times [2023-08-30 16:21:35,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:35,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201847043] [2023-08-30 16:21:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:35,850 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 16:21:35,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:35,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201847043] [2023-08-30 16:21:35,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201847043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:35,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:35,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:21:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440642654] [2023-08-30 16:21:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:35,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:35,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:35,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 293 [2023-08-30 16:21:35,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:35,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:35,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 293 [2023-08-30 16:21:35,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:36,091 INFO L130 PetriNetUnfolder]: 845/1382 cut-off events. [2023-08-30 16:21:36,092 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-08-30 16:21:36,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2798 conditions, 1382 events. 845/1382 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5801 event pairs, 243 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 2590. Up to 777 conditions per place. [2023-08-30 16:21:36,101 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-30 16:21:36,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-08-30 16:21:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-30 16:21:36,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563139931740614 [2023-08-30 16:21:36,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-30 16:21:36,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-30 16:21:36,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:36,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-30 16:21:36,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,130 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 489 transitions. [2023-08-30 16:21:36,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-08-30 16:21:36,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:21:36,135 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-08-30 16:21:36,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=70, 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=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-08-30 16:21:36,139 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-08-30 16:21:36,140 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-08-30 16:21:36,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:36,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:21:36,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:36,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:36,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1024065199, now seen corresponding path program 1 times [2023-08-30 16:21:36,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:36,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609798036] [2023-08-30 16:21:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:36,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:36,231 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 16:21:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:36,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609798036] [2023-08-30 16:21:36,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609798036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:36,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:21:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000997180] [2023-08-30 16:21:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:36,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 293 [2023-08-30 16:21:36,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:36,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 293 [2023-08-30 16:21:36,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:36,394 INFO L130 PetriNetUnfolder]: 889/1469 cut-off events. [2023-08-30 16:21:36,394 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2023-08-30 16:21:36,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 1469 events. 889/1469 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6039 event pairs, 401 based on Foata normal form. 22/1279 useless extension candidates. Maximal degree in co-relation 2803. Up to 1189 conditions per place. [2023-08-30 16:21:36,401 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-30 16:21:36,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-08-30 16:21:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-30 16:21:36,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494880546075085 [2023-08-30 16:21:36,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-30 16:21:36,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-30 16:21:36,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:36,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-30 16:21:36,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,409 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 483 transitions. [2023-08-30 16:21:36,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-08-30 16:21:36,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:21:36,412 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-08-30 16:21:36,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-30 16:21:36,413 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-30 16:21:36,413 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-08-30 16:21:36,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:36,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:36,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:21:36,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:36,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash 794946535, now seen corresponding path program 1 times [2023-08-30 16:21:36,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:36,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510909753] [2023-08-30 16:21:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:36,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:36,468 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 16:21:36,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:36,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510909753] [2023-08-30 16:21:36,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510909753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:36,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:36,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:21:36,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922677478] [2023-08-30 16:21:36,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:36,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:36,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:36,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:36,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 293 [2023-08-30 16:21:36,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:36,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 293 [2023-08-30 16:21:36,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:36,662 INFO L130 PetriNetUnfolder]: 942/1555 cut-off events. [2023-08-30 16:21:36,662 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-30 16:21:36,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1555 events. 942/1555 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6593 event pairs, 653 based on Foata normal form. 50/1437 useless extension candidates. Maximal degree in co-relation 3052. Up to 1389 conditions per place. [2023-08-30 16:21:36,670 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 51 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-30 16:21:36,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 266 flow [2023-08-30 16:21:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-30 16:21:36,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449374288964732 [2023-08-30 16:21:36,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-30 16:21:36,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-30 16:21:36,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:36,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-30 16:21:36,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,678 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 479 transitions. [2023-08-30 16:21:36,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 266 flow [2023-08-30 16:21:36,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:21:36,680 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-08-30 16:21:36,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-30 16:21:36,681 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-08-30 16:21:36,681 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-08-30 16:21:36,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:36,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:36,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:36,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:21:36,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:36,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1768410213, now seen corresponding path program 1 times [2023-08-30 16:21:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:36,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864269784] [2023-08-30 16:21:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:36,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:36,785 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 16:21:36,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:36,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864269784] [2023-08-30 16:21:36,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864269784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:21:36,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832302932] [2023-08-30 16:21:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:36,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:36,797 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 16:21:36,822 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 16:21:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 16:21:36,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:21:37,000 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 16:21:37,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:21:37,060 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 16:21:37,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832302932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:21:37,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:21:37,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 16:21:37,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346129753] [2023-08-30 16:21:37,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:21:37,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:21:37,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:21:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:21:37,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 293 [2023-08-30 16:21:37,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:37,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:37,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 293 [2023-08-30 16:21:37,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:37,627 INFO L130 PetriNetUnfolder]: 1815/3000 cut-off events. [2023-08-30 16:21:37,628 INFO L131 PetriNetUnfolder]: For 1075/1075 co-relation queries the response was YES. [2023-08-30 16:21:37,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 3000 events. 1815/3000 cut-off events. For 1075/1075 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14146 event pairs, 349 based on Foata normal form. 48/2736 useless extension candidates. Maximal degree in co-relation 6486. Up to 844 conditions per place. [2023-08-30 16:21:37,643 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-08-30 16:21:37,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-08-30 16:21:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 16:21:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 16:21:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1585 transitions. [2023-08-30 16:21:37,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409556313993175 [2023-08-30 16:21:37,647 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1585 transitions. [2023-08-30 16:21:37,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1585 transitions. [2023-08-30 16:21:37,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:37,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1585 transitions. [2023-08-30 16:21:37,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:37,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:37,658 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:37,658 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1585 transitions. [2023-08-30 16:21:37,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-08-30 16:21:37,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:21:37,670 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-08-30 16:21:37,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-08-30 16:21:37,672 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-08-30 16:21:37,673 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-08-30 16:21:37,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:37,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:37,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:37,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 16:21:37,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:37,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:37,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash 362891190, now seen corresponding path program 1 times [2023-08-30 16:21:37,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:37,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914170974] [2023-08-30 16:21:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:37,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:37,987 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 16:21:37,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:37,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914170974] [2023-08-30 16:21:37,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914170974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:37,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:37,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:21:37,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713756662] [2023-08-30 16:21:37,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:37,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:21:37,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:21:37,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:21:38,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 293 [2023-08-30 16:21:38,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:38,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 293 [2023-08-30 16:21:38,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:38,157 INFO L130 PetriNetUnfolder]: 613/1142 cut-off events. [2023-08-30 16:21:38,158 INFO L131 PetriNetUnfolder]: For 302/302 co-relation queries the response was YES. [2023-08-30 16:21:38,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1142 events. 613/1142 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4886 event pairs, 98 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 1750. Up to 861 conditions per place. [2023-08-30 16:21:38,164 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 49 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-08-30 16:21:38,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 335 flow [2023-08-30 16:21:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:21:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:21:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-30 16:21:38,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5301478953356087 [2023-08-30 16:21:38,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-30 16:21:38,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-30 16:21:38,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:38,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-30 16:21:38,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,172 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 466 transitions. [2023-08-30 16:21:38,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 335 flow [2023-08-30 16:21:38,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 323 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 16:21:38,177 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-08-30 16:21:38,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-30 16:21:38,180 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-08-30 16:21:38,180 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-08-30 16:21:38,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:38,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:38,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:21:38,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:38,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash 647657202, now seen corresponding path program 1 times [2023-08-30 16:21:38,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:38,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919882467] [2023-08-30 16:21:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:38,265 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 16:21:38,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:38,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919882467] [2023-08-30 16:21:38,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919882467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:38,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:38,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:21:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506319778] [2023-08-30 16:21:38,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:38,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:21:38,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:21:38,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:21:38,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 293 [2023-08-30 16:21:38,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:38,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 293 [2023-08-30 16:21:38,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:38,498 INFO L130 PetriNetUnfolder]: 727/1350 cut-off events. [2023-08-30 16:21:38,498 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-08-30 16:21:38,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1350 events. 727/1350 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5723 event pairs, 207 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2672. Up to 529 conditions per place. [2023-08-30 16:21:38,505 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 80 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-08-30 16:21:38,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 526 flow [2023-08-30 16:21:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:21:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:21:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 784 transitions. [2023-08-30 16:21:38,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351535836177475 [2023-08-30 16:21:38,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 784 transitions. [2023-08-30 16:21:38,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 784 transitions. [2023-08-30 16:21:38,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:38,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 784 transitions. [2023-08-30 16:21:38,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,515 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 784 transitions. [2023-08-30 16:21:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 526 flow [2023-08-30 16:21:38,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:21:38,520 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-08-30 16:21:38,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-30 16:21:38,522 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-08-30 16:21:38,523 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-08-30 16:21:38,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:38,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:38,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:38,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:21:38,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:38,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 461657146, now seen corresponding path program 1 times [2023-08-30 16:21:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:38,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365002099] [2023-08-30 16:21:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:38,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:39,077 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 16:21:39,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365002099] [2023-08-30 16:21:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365002099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:39,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:39,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:21:39,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029102666] [2023-08-30 16:21:39,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:39,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:21:39,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:21:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:21:39,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-08-30 16:21:39,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:39,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:39,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-08-30 16:21:39,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:40,195 INFO L130 PetriNetUnfolder]: 1075/1997 cut-off events. [2023-08-30 16:21:40,196 INFO L131 PetriNetUnfolder]: For 1232/1232 co-relation queries the response was YES. [2023-08-30 16:21:40,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5096 conditions, 1997 events. 1075/1997 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9740 event pairs, 295 based on Foata normal form. 0/1979 useless extension candidates. Maximal degree in co-relation 3100. Up to 1191 conditions per place. [2023-08-30 16:21:40,206 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 115 selfloop transitions, 11 changer transitions 3/130 dead transitions. [2023-08-30 16:21:40,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 130 transitions, 796 flow [2023-08-30 16:21:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:21:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:21:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1226 transitions. [2023-08-30 16:21:40,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46492226014410315 [2023-08-30 16:21:40,211 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1226 transitions. [2023-08-30 16:21:40,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1226 transitions. [2023-08-30 16:21:40,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:40,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1226 transitions. [2023-08-30 16:21:40,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.22222222222223) internal successors, (1226), 9 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:40,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:40,218 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:40,218 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 9 states and 1226 transitions. [2023-08-30 16:21:40,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 130 transitions, 796 flow [2023-08-30 16:21:40,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 776 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 16:21:40,224 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 327 flow [2023-08-30 16:21:40,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-30 16:21:40,225 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2023-08-30 16:21:40,225 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 327 flow [2023-08-30 16:21:40,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:40,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:40,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:21:40,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:40,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash -329150994, now seen corresponding path program 2 times [2023-08-30 16:21:40,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:40,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482677992] [2023-08-30 16:21:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:40,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:40,791 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 16:21:40,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:40,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482677992] [2023-08-30 16:21:40,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482677992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:40,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:40,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:21:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902841214] [2023-08-30 16:21:40,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:21:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:21:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:21:41,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-08-30 16:21:41,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 327 flow. Second operand has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:41,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:41,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-08-30 16:21:41,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:41,914 INFO L130 PetriNetUnfolder]: 1373/2553 cut-off events. [2023-08-30 16:21:41,914 INFO L131 PetriNetUnfolder]: For 1522/1522 co-relation queries the response was YES. [2023-08-30 16:21:41,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6951 conditions, 2553 events. 1373/2553 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12875 event pairs, 355 based on Foata normal form. 0/2529 useless extension candidates. Maximal degree in co-relation 4514. Up to 1110 conditions per place. [2023-08-30 16:21:41,928 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 115 selfloop transitions, 16 changer transitions 3/135 dead transitions. [2023-08-30 16:21:41,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 885 flow [2023-08-30 16:21:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:21:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:21:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1226 transitions. [2023-08-30 16:21:41,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46492226014410315 [2023-08-30 16:21:41,932 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1226 transitions. [2023-08-30 16:21:41,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1226 transitions. [2023-08-30 16:21:41,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:41,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1226 transitions. [2023-08-30 16:21:41,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.22222222222223) internal successors, (1226), 9 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:41,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:41,939 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:41,940 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 327 flow. Second operand 9 states and 1226 transitions. [2023-08-30 16:21:41,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 885 flow [2023-08-30 16:21:41,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 885 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:21:41,946 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 419 flow [2023-08-30 16:21:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=419, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-08-30 16:21:41,947 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-08-30 16:21:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 419 flow [2023-08-30 16:21:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:41,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:41,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:41,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:21:41,949 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:41,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1790252439, now seen corresponding path program 1 times [2023-08-30 16:21:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:41,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314273696] [2023-08-30 16:21:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:21:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:42,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314273696] [2023-08-30 16:21:42,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314273696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:21:42,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:21:42,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:21:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944561786] [2023-08-30 16:21:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:21:42,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:21:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:21:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:21:42,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 293 [2023-08-30 16:21:42,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 135.42857142857142) internal successors, (948), 7 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:42,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:42,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 293 [2023-08-30 16:21:42,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:42,527 INFO L130 PetriNetUnfolder]: 1393/2595 cut-off events. [2023-08-30 16:21:42,527 INFO L131 PetriNetUnfolder]: For 2184/2184 co-relation queries the response was YES. [2023-08-30 16:21:42,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 2595 events. 1393/2595 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12907 event pairs, 474 based on Foata normal form. 16/2581 useless extension candidates. Maximal degree in co-relation 5306. Up to 926 conditions per place. [2023-08-30 16:21:42,550 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 113 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-08-30 16:21:42,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 134 transitions, 961 flow [2023-08-30 16:21:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:21:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:21:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1291 transitions. [2023-08-30 16:21:42,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895714827455442 [2023-08-30 16:21:42,554 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1291 transitions. [2023-08-30 16:21:42,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1291 transitions. [2023-08-30 16:21:42,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:42,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1291 transitions. [2023-08-30 16:21:42,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.44444444444446) internal successors, (1291), 9 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:42,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:42,562 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:42,562 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 419 flow. Second operand 9 states and 1291 transitions. [2023-08-30 16:21:42,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 134 transitions, 961 flow [2023-08-30 16:21:42,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 134 transitions, 931 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 16:21:42,575 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 554 flow [2023-08-30 16:21:42,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=554, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-08-30 16:21:42,576 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 50 predicate places. [2023-08-30 16:21:42,577 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 554 flow [2023-08-30 16:21:42,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.42857142857142) internal successors, (948), 7 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:21:42,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:42,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:21:42,578 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:42,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 566216759, now seen corresponding path program 1 times [2023-08-30 16:21:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:42,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795905630] [2023-08-30 16:21:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:21:42,610 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:21:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:21:42,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:21:42,672 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:21:42,672 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-30 16:21:42,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-30 16:21:42,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-30 16:21:42,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 16:21:42,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 16:21:42,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 16:21:42,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:21:42,676 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:42,681 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 16:21:42,681 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 16:21:42,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:21:42 BasicIcfg [2023-08-30 16:21:42,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 16:21:42,752 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 16:21:42,752 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 16:21:42,753 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 16:21:42,753 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:31" (3/4) ... [2023-08-30 16:21:42,755 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 16:21:42,820 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 16:21:42,820 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 16:21:42,821 INFO L158 Benchmark]: Toolchain (without parser) took 12245.66ms. Allocated memory was 71.3MB in the beginning and 289.4MB in the end (delta: 218.1MB). Free memory was 46.9MB in the beginning and 228.2MB in the end (delta: -181.3MB). Peak memory consumption was 38.4MB. Max. memory is 16.1GB. [2023-08-30 16:21:42,821 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 30.9MB in the beginning and 30.9MB in the end (delta: 52.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:21:42,821 INFO L158 Benchmark]: CACSL2BoogieTranslator took 690.07ms. Allocated memory is still 71.3MB. Free memory was 46.5MB in the beginning and 34.3MB in the end (delta: 12.2MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2023-08-30 16:21:42,822 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.55ms. Allocated memory is still 71.3MB. Free memory was 34.3MB in the beginning and 31.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:21:42,822 INFO L158 Benchmark]: Boogie Preprocessor took 60.17ms. Allocated memory is still 90.2MB. Free memory was 69.1MB in the beginning and 67.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:21:42,822 INFO L158 Benchmark]: RCFGBuilder took 458.13ms. Allocated memory is still 90.2MB. Free memory was 67.4MB in the beginning and 50.2MB in the end (delta: 17.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-08-30 16:21:42,822 INFO L158 Benchmark]: TraceAbstraction took 10875.45ms. Allocated memory was 90.2MB in the beginning and 289.4MB in the end (delta: 199.2MB). Free memory was 49.3MB in the beginning and 238.7MB in the end (delta: -189.3MB). Peak memory consumption was 137.4MB. Max. memory is 16.1GB. [2023-08-30 16:21:42,823 INFO L158 Benchmark]: Witness Printer took 67.87ms. Allocated memory is still 289.4MB. Free memory was 238.7MB in the beginning and 228.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 16:21:42,825 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 30.9MB in the beginning and 30.9MB in the end (delta: 52.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 690.07ms. Allocated memory is still 71.3MB. Free memory was 46.5MB in the beginning and 34.3MB in the end (delta: 12.2MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.55ms. Allocated memory is still 71.3MB. Free memory was 34.3MB in the beginning and 31.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.17ms. Allocated memory is still 90.2MB. Free memory was 69.1MB in the beginning and 67.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 458.13ms. Allocated memory is still 90.2MB. Free memory was 67.4MB in the beginning and 50.2MB in the end (delta: 17.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 10875.45ms. Allocated memory was 90.2MB in the beginning and 289.4MB in the end (delta: 199.2MB). Free memory was 49.3MB in the beginning and 238.7MB in the end (delta: -189.3MB). Peak memory consumption was 137.4MB. Max. memory is 16.1GB. * Witness Printer took 67.87ms. Allocated memory is still 289.4MB. Free memory was 238.7MB in the beginning and 228.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 144 PlacesBefore, 35 PlacesAfterwards, 147 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 135 TotalNumberOfCompositions, 10082 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7371, independent: 7178, independent conditional: 0, independent unconditional: 7178, dependent: 193, dependent conditional: 0, dependent unconditional: 193, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4167, independent: 4119, independent conditional: 0, independent unconditional: 4119, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7371, independent: 3059, independent conditional: 0, independent unconditional: 3059, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 4167, unknown conditional: 0, unknown unconditional: 4167] , Statistics on independence cache: Total cache size (in pairs): 178, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 250 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1199 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1019 mSDsluCounter, 851 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 844 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3528 IncrementalHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 7 mSDtfsCounter, 3528 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=554occurred in iteration=9, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1523 SizeOfPredicates, 1 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-30 16:21:42,852 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 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE