./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-deagle/arithmetic_prog_ok.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 29016034e4102bf62d4fcba069301a54da1d77dfd5739e4cf52e395ddaa22e38 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 15:10:36,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 15:10:36,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 15:10:36,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 15:10:36,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 15:10:36,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 15:10:36,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 15:10:36,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 15:10:36,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 15:10:36,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 15:10:36,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 15:10:36,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 15:10:36,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 15:10:36,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 15:10:36,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 15:10:36,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 15:10:36,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 15:10:36,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 15:10:36,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 15:10:36,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 15:10:36,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 15:10:36,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 15:10:36,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 15:10:36,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 15:10:36,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 15:10:36,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 15:10:36,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 15:10:36,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 15:10:36,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 15:10:36,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 15:10:36,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 15:10:36,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 15:10:36,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 15:10:36,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 15:10:36,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 15:10:36,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 15:10:36,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 15:10:36,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 15:10:36,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 15:10:36,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 15:10:36,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 15:10:36,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 15:10:36,618 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 15:10:36,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 15:10:36,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 15:10:36,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 15:10:36,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 15:10:36,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 15:10:36,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 15:10:36,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 15:10:36,621 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 15:10:36,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 15:10:36,622 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 15:10:36,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 15:10:36,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 15:10:36,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 15:10:36,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 15:10:36,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 15:10:36,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 15:10:36,623 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 15:10:36,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 15:10:36,624 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 15:10:36,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 15:10:36,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 15:10:36,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 15:10:36,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 15:10:36,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:10:36,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 15:10:36,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 15:10:36,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 15:10:36,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 15:10:36,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 15:10:36,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 15:10:36,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 15:10:36,626 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 15:10:36,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 15:10:36,627 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 15:10:36,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29016034e4102bf62d4fcba069301a54da1d77dfd5739e4cf52e395ddaa22e38 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 15:10:36,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 15:10:36,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 15:10:36,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 15:10:36,949 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 15:10:36,949 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 15:10:36,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2023-09-01 15:10:38,175 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 15:10:38,485 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 15:10:38,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2023-09-01 15:10:38,497 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e91000429/7d46b6b541904b5f91a0bbce9e84e40f/FLAGc903c8ff9 [2023-09-01 15:10:38,514 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e91000429/7d46b6b541904b5f91a0bbce9e84e40f [2023-09-01 15:10:38,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 15:10:38,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 15:10:38,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 15:10:38,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 15:10:38,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 15:10:38,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:38" (1/1) ... [2023-09-01 15:10:38,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@754d63e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:38, skipping insertion in model container [2023-09-01 15:10:38,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:38" (1/1) ... [2023-09-01 15:10:38,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 15:10:38,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 15:10:38,991 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-deagle/arithmetic_prog_ok.i[39757,39770] [2023-09-01 15:10:38,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:10:39,014 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 15:10:39,067 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-deagle/arithmetic_prog_ok.i[39757,39770] [2023-09-01 15:10:39,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:10:39,143 INFO L208 MainTranslator]: Completed translation [2023-09-01 15:10:39,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39 WrapperNode [2023-09-01 15:10:39,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 15:10:39,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 15:10:39,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 15:10:39,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 15:10:39,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,210 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2023-09-01 15:10:39,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 15:10:39,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 15:10:39,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 15:10:39,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 15:10:39,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,254 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 15:10:39,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 15:10:39,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 15:10:39,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 15:10:39,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (1/1) ... [2023-09-01 15:10:39,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:10:39,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:39,298 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) [2023-09-01 15:10:39,312 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 [2023-09-01 15:10:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 15:10:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 15:10:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-09-01 15:10:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 15:10:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 15:10:39,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 15:10:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 15:10:39,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 15:10:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 15:10:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 15:10:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 15:10:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 15:10:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 15:10:39,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 15:10:39,342 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 15:10:39,531 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 15:10:39,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 15:10:39,717 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 15:10:39,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 15:10:39,724 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 15:10:39,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:39 BoogieIcfgContainer [2023-09-01 15:10:39,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 15:10:39,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 15:10:39,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 15:10:39,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 15:10:39,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:10:38" (1/3) ... [2023-09-01 15:10:39,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd25ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:10:39, skipping insertion in model container [2023-09-01 15:10:39,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:39" (2/3) ... [2023-09-01 15:10:39,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd25ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:10:39, skipping insertion in model container [2023-09-01 15:10:39,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:39" (3/3) ... [2023-09-01 15:10:39,733 INFO L112 eAbstractionObserver]: Analyzing ICFG arithmetic_prog_ok.i [2023-09-01 15:10:39,740 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 15:10:39,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 15:10:39,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 15:10:39,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 15:10:39,821 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 15:10:39,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 278 flow [2023-09-01 15:10:39,908 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2023-09-01 15:10:39,909 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:10:39,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 10/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 82. Up to 3 conditions per place. [2023-09-01 15:10:39,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 131 transitions, 278 flow [2023-09-01 15:10:39,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:39,922 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 15:10:39,930 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:39,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:39,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:39,966 INFO L130 PetriNetUnfolder]: 8/118 cut-off events. [2023-09-01 15:10:39,966 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:10:39,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 8/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-09-01 15:10:39,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 1922 [2023-09-01 15:10:44,795 INFO L134 LiptonReduction]: Checked pairs total: 4363 [2023-09-01 15:10:44,796 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-09-01 15:10:44,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 15:10:44,812 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;@4372c0e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 15:10:44,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 15:10:44,819 INFO L130 PetriNetUnfolder]: 5/29 cut-off events. [2023-09-01 15:10:44,819 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:10:44,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:44,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:44,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:44,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash -616360160, now seen corresponding path program 1 times [2023-09-01 15:10:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:44,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347661944] [2023-09-01 15:10:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:44,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347661944] [2023-09-01 15:10:45,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347661944] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:45,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:45,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:10:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15600362] [2023-09-01 15:10:45,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:45,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:45,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:45,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 224 [2023-09-01 15:10:45,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:45,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 224 [2023-09-01 15:10:45,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:45,346 INFO L130 PetriNetUnfolder]: 219/470 cut-off events. [2023-09-01 15:10:45,347 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 15:10:45,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 470 events. 219/470 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2196 event pairs, 87 based on Foata normal form. 28/432 useless extension candidates. Maximal degree in co-relation 772. Up to 225 conditions per place. [2023-09-01 15:10:45,356 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 34 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-09-01 15:10:45,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 173 flow [2023-09-01 15:10:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-09-01 15:10:45,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2023-09-01 15:10:45,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-09-01 15:10:45,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-09-01 15:10:45,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:45,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-09-01 15:10:45,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,394 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 3 states and 390 transitions. [2023-09-01 15:10:45,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 173 flow [2023-09-01 15:10:45,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 163 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 15:10:45,399 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 74 flow [2023-09-01 15:10:45,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-09-01 15:10:45,403 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-09-01 15:10:45,403 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 74 flow [2023-09-01 15:10:45,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:45,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:45,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 15:10:45,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:45,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2115918277, now seen corresponding path program 1 times [2023-09-01 15:10:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:45,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148490533] [2023-09-01 15:10:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:45,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148490533] [2023-09-01 15:10:45,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148490533] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:45,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:45,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:10:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593522942] [2023-09-01 15:10:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:45,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:45,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:45,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 224 [2023-09-01 15:10:45,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:45,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 224 [2023-09-01 15:10:45,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:45,630 INFO L130 PetriNetUnfolder]: 357/694 cut-off events. [2023-09-01 15:10:45,631 INFO L131 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2023-09-01 15:10:45,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 694 events. 357/694 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3192 event pairs, 141 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 442. Up to 347 conditions per place. [2023-09-01 15:10:45,635 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-09-01 15:10:45,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 191 flow [2023-09-01 15:10:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-09-01 15:10:45,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2023-09-01 15:10:45,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-09-01 15:10:45,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-09-01 15:10:45,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:45,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-09-01 15:10:45,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,642 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 74 flow. Second operand 3 states and 388 transitions. [2023-09-01 15:10:45,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 191 flow [2023-09-01 15:10:45,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:45,644 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2023-09-01 15:10:45,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-09-01 15:10:45,645 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-09-01 15:10:45,645 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2023-09-01 15:10:45,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:45,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:45,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 15:10:45,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:45,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash 26892520, now seen corresponding path program 1 times [2023-09-01 15:10:45,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696789618] [2023-09-01 15:10:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:45,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:45,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696789618] [2023-09-01 15:10:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696789618] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:45,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:45,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:10:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852555587] [2023-09-01 15:10:45,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:45,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:45,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:45,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 224 [2023-09-01 15:10:45,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:45,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 224 [2023-09-01 15:10:45,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:45,925 INFO L130 PetriNetUnfolder]: 309/688 cut-off events. [2023-09-01 15:10:45,925 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 15:10:45,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 688 events. 309/688 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3367 event pairs, 105 based on Foata normal form. 80/740 useless extension candidates. Maximal degree in co-relation 413. Up to 316 conditions per place. [2023-09-01 15:10:45,931 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-09-01 15:10:45,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 183 flow [2023-09-01 15:10:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-09-01 15:10:45,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2023-09-01 15:10:45,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-09-01 15:10:45,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-09-01 15:10:45,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:45,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-09-01 15:10:45,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,938 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 3 states and 370 transitions. [2023-09-01 15:10:45,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 183 flow [2023-09-01 15:10:45,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:45,941 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 102 flow [2023-09-01 15:10:45,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-09-01 15:10:45,942 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 15:10:45,942 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 102 flow [2023-09-01 15:10:45,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:45,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:45,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:45,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 15:10:45,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:45,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1826989588, now seen corresponding path program 2 times [2023-09-01 15:10:45,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:45,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816282138] [2023-09-01 15:10:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:45,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816282138] [2023-09-01 15:10:46,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816282138] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112187074] [2023-09-01 15:10:46,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:10:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:46,061 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) [2023-09-01 15:10:46,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 15:10:46,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:10:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:46,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 15:10:46,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:46,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112187074] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:46,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:46,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-09-01 15:10:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229536130] [2023-09-01 15:10:46,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:46,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 15:10:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 15:10:46,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-09-01 15:10:46,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 224 [2023-09-01 15:10:46,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:46,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:46,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 224 [2023-09-01 15:10:46,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:46,736 INFO L130 PetriNetUnfolder]: 631/1544 cut-off events. [2023-09-01 15:10:46,737 INFO L131 PetriNetUnfolder]: For 432/438 co-relation queries the response was YES. [2023-09-01 15:10:46,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3485 conditions, 1544 events. 631/1544 cut-off events. For 432/438 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8646 event pairs, 42 based on Foata normal form. 134/1608 useless extension candidates. Maximal degree in co-relation 843. Up to 306 conditions per place. [2023-09-01 15:10:46,744 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 141 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-09-01 15:10:46,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 181 transitions, 978 flow [2023-09-01 15:10:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 15:10:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 15:10:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1980 transitions. [2023-09-01 15:10:46,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524553571428571 [2023-09-01 15:10:46,750 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1980 transitions. [2023-09-01 15:10:46,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1980 transitions. [2023-09-01 15:10:46,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:46,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1980 transitions. [2023-09-01 15:10:46,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 123.75) internal successors, (1980), 16 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:46,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 224.0) internal successors, (3808), 17 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:46,763 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 224.0) internal successors, (3808), 17 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:46,764 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 102 flow. Second operand 16 states and 1980 transitions. [2023-09-01 15:10:46,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 181 transitions, 978 flow [2023-09-01 15:10:46,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 181 transitions, 892 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:46,770 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 388 flow [2023-09-01 15:10:46,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=388, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-09-01 15:10:46,770 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2023-09-01 15:10:46,771 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 388 flow [2023-09-01 15:10:46,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:46,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:46,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:46,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:46,978 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 [2023-09-01 15:10:46,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:46,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash 734167052, now seen corresponding path program 3 times [2023-09-01 15:10:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:46,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004115087] [2023-09-01 15:10:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:46,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-09-01 15:10:47,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:47,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004115087] [2023-09-01 15:10:47,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004115087] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:47,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937901911] [2023-09-01 15:10:47,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:10:47,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:47,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:47,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:47,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 15:10:47,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:10:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 15:10:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-09-01 15:10:47,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:10:47,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937901911] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:47,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 15:10:47,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-09-01 15:10:47,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922203553] [2023-09-01 15:10:47,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:47,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 15:10:47,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 224 [2023-09-01 15:10:47,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:47,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 224 [2023-09-01 15:10:47,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:47,652 INFO L130 PetriNetUnfolder]: 977/2068 cut-off events. [2023-09-01 15:10:47,652 INFO L131 PetriNetUnfolder]: For 5067/5067 co-relation queries the response was YES. [2023-09-01 15:10:47,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6004 conditions, 2068 events. 977/2068 cut-off events. For 5067/5067 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 11076 event pairs, 191 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 4606. Up to 785 conditions per place. [2023-09-01 15:10:47,666 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 98 selfloop transitions, 8 changer transitions 1/110 dead transitions. [2023-09-01 15:10:47,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 902 flow [2023-09-01 15:10:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 618 transitions. [2023-09-01 15:10:47,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517857142857143 [2023-09-01 15:10:47,668 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 618 transitions. [2023-09-01 15:10:47,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 618 transitions. [2023-09-01 15:10:47,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:47,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 618 transitions. [2023-09-01 15:10:47,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,675 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,675 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 388 flow. Second operand 5 states and 618 transitions. [2023-09-01 15:10:47,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 902 flow [2023-09-01 15:10:47,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 835 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-09-01 15:10:47,690 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 398 flow [2023-09-01 15:10:47,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-09-01 15:10:47,693 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2023-09-01 15:10:47,693 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 398 flow [2023-09-01 15:10:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:47,694 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:47,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:47,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:47,900 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:47,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1347316854, now seen corresponding path program 4 times [2023-09-01 15:10:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:47,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855512636] [2023-09-01 15:10:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-09-01 15:10:48,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855512636] [2023-09-01 15:10:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855512636] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325293793] [2023-09-01 15:10:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:10:48,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:48,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:48,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:48,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 15:10:48,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:10:48,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 15:10:48,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-09-01 15:10:48,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-09-01 15:10:48,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325293793] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:48,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:48,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-09-01 15:10:48,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530021325] [2023-09-01 15:10:48,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:48,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 15:10:48,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 15:10:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 15:10:48,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 224 [2023-09-01 15:10:48,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:48,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:48,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 224 [2023-09-01 15:10:48,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:48,582 INFO L130 PetriNetUnfolder]: 1019/2398 cut-off events. [2023-09-01 15:10:48,583 INFO L131 PetriNetUnfolder]: For 7109/7133 co-relation queries the response was YES. [2023-09-01 15:10:48,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7400 conditions, 2398 events. 1019/2398 cut-off events. For 7109/7133 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14058 event pairs, 168 based on Foata normal form. 118/2506 useless extension candidates. Maximal degree in co-relation 6062. Up to 436 conditions per place. [2023-09-01 15:10:48,599 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 95 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2023-09-01 15:10:48,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 123 transitions, 976 flow [2023-09-01 15:10:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 15:10:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 15:10:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 767 transitions. [2023-09-01 15:10:48,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706845238095238 [2023-09-01 15:10:48,602 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 767 transitions. [2023-09-01 15:10:48,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 767 transitions. [2023-09-01 15:10:48,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:48,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 767 transitions. [2023-09-01 15:10:48,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.83333333333333) internal successors, (767), 6 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:48,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:48,607 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:48,607 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 398 flow. Second operand 6 states and 767 transitions. [2023-09-01 15:10:48,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 123 transitions, 976 flow [2023-09-01 15:10:48,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 976 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 15:10:48,623 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 469 flow [2023-09-01 15:10:48,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-09-01 15:10:48,625 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2023-09-01 15:10:48,626 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 469 flow [2023-09-01 15:10:48,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:48,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:48,627 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:48,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:48,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:48,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:48,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash 804205986, now seen corresponding path program 5 times [2023-09-01 15:10:48,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:48,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661933022] [2023-09-01 15:10:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:48,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-09-01 15:10:48,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:48,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661933022] [2023-09-01 15:10:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661933022] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:48,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:48,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 15:10:48,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130150469] [2023-09-01 15:10:48,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:48,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:48,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:48,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 224 [2023-09-01 15:10:48,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:48,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:48,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 224 [2023-09-01 15:10:48,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:49,164 INFO L130 PetriNetUnfolder]: 748/1739 cut-off events. [2023-09-01 15:10:49,165 INFO L131 PetriNetUnfolder]: For 5925/5933 co-relation queries the response was YES. [2023-09-01 15:10:49,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 1739 events. 748/1739 cut-off events. For 5925/5933 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9454 event pairs, 193 based on Foata normal form. 80/1810 useless extension candidates. Maximal degree in co-relation 5231. Up to 1150 conditions per place. [2023-09-01 15:10:49,177 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 53 selfloop transitions, 3 changer transitions 3/65 dead transitions. [2023-09-01 15:10:49,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 65 transitions, 536 flow [2023-09-01 15:10:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-09-01 15:10:49,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2023-09-01 15:10:49,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-09-01 15:10:49,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-09-01 15:10:49,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:49,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-09-01 15:10:49,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,183 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 469 flow. Second operand 3 states and 381 transitions. [2023-09-01 15:10:49,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 65 transitions, 536 flow [2023-09-01 15:10:49,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 508 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-09-01 15:10:49,195 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 336 flow [2023-09-01 15:10:49,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-09-01 15:10:49,196 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2023-09-01 15:10:49,196 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 336 flow [2023-09-01 15:10:49,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:49,197 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:49,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 15:10:49,197 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:49,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:49,197 INFO L85 PathProgramCache]: Analyzing trace with hash 350347520, now seen corresponding path program 6 times [2023-09-01 15:10:49,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104389476] [2023-09-01 15:10:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:49,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-09-01 15:10:49,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:49,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104389476] [2023-09-01 15:10:49,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104389476] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:49,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001791097] [2023-09-01 15:10:49,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:10:49,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:49,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:49,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:49,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 15:10:49,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 15:10:49,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:49,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 15:10:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-09-01 15:10:49,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:10:49,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001791097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:49,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 15:10:49,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2023-09-01 15:10:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868257981] [2023-09-01 15:10:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 15:10:49,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 15:10:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 15:10:49,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 224 [2023-09-01 15:10:49,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:49,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 224 [2023-09-01 15:10:49,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:49,866 INFO L130 PetriNetUnfolder]: 709/1544 cut-off events. [2023-09-01 15:10:49,867 INFO L131 PetriNetUnfolder]: For 3668/3668 co-relation queries the response was YES. [2023-09-01 15:10:49,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1544 events. 709/1544 cut-off events. For 3668/3668 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7322 event pairs, 185 based on Foata normal form. 34/1578 useless extension candidates. Maximal degree in co-relation 3165. Up to 668 conditions per place. [2023-09-01 15:10:49,876 INFO L137 encePairwiseOnDemand]: 215/224 looper letters, 69 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2023-09-01 15:10:49,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 652 flow [2023-09-01 15:10:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 15:10:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 15:10:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2023-09-01 15:10:49,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-09-01 15:10:49,879 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2023-09-01 15:10:49,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2023-09-01 15:10:49,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:49,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2023-09-01 15:10:49,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,884 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,884 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 336 flow. Second operand 6 states and 708 transitions. [2023-09-01 15:10:49,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 652 flow [2023-09-01 15:10:49,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 81 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 15:10:49,891 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 380 flow [2023-09-01 15:10:49,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-09-01 15:10:49,892 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2023-09-01 15:10:49,892 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 380 flow [2023-09-01 15:10:49,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:49,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:49,893 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:49,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:50,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:50,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:50,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:50,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1529417168, now seen corresponding path program 7 times [2023-09-01 15:10:50,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:50,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46579062] [2023-09-01 15:10:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:50,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 15:10:50,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:50,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46579062] [2023-09-01 15:10:50,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46579062] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:50,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672538617] [2023-09-01 15:10:50,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:10:50,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:50,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:50,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:50,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 15:10:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 15:10:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 15:10:50,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 15:10:50,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672538617] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:50,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:50,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 9 [2023-09-01 15:10:50,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796142476] [2023-09-01 15:10:50,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:50,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 15:10:50,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:50,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 15:10:50,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 15:10:50,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 224 [2023-09-01 15:10:50,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 114.1) internal successors, (1141), 10 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:50,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:50,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 224 [2023-09-01 15:10:50,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:51,043 INFO L130 PetriNetUnfolder]: 375/832 cut-off events. [2023-09-01 15:10:51,043 INFO L131 PetriNetUnfolder]: For 2487/2487 co-relation queries the response was YES. [2023-09-01 15:10:51,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 832 events. 375/832 cut-off events. For 2487/2487 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2946 event pairs, 104 based on Foata normal form. 28/860 useless extension candidates. Maximal degree in co-relation 1449. Up to 351 conditions per place. [2023-09-01 15:10:51,048 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 61 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-09-01 15:10:51,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 586 flow [2023-09-01 15:10:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 15:10:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 15:10:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2023-09-01 15:10:51,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252976190476191 [2023-09-01 15:10:51,051 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2023-09-01 15:10:51,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2023-09-01 15:10:51,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:51,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2023-09-01 15:10:51,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:51,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:51,057 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:51,057 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 380 flow. Second operand 6 states and 706 transitions. [2023-09-01 15:10:51,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 586 flow [2023-09-01 15:10:51,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 530 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-09-01 15:10:51,062 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 283 flow [2023-09-01 15:10:51,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-09-01 15:10:51,064 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-09-01 15:10:51,064 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 283 flow [2023-09-01 15:10:51,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.1) internal successors, (1141), 10 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:51,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:51,065 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:51,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:51,271 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:51,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1103703702, now seen corresponding path program 8 times [2023-09-01 15:10:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:51,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867050710] [2023-09-01 15:10:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:51,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867050710] [2023-09-01 15:10:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867050710] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805137577] [2023-09-01 15:10:51,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:10:51,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:51,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:51,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 15:10:52,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:10:52,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:52,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 15:10:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:52,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:55,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805137577] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:55,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:55,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-09-01 15:10:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101009264] [2023-09-01 15:10:55,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:55,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 15:10:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 15:10:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2023-09-01 15:10:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 224 [2023-09-01 15:10:55,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 283 flow. Second operand has 31 states, 31 states have (on average 113.54838709677419) internal successors, (3520), 31 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:55,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:55,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 224 [2023-09-01 15:10:55,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:57,017 INFO L130 PetriNetUnfolder]: 255/668 cut-off events. [2023-09-01 15:10:57,017 INFO L131 PetriNetUnfolder]: For 1337/1343 co-relation queries the response was YES. [2023-09-01 15:10:57,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 668 events. 255/668 cut-off events. For 1337/1343 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2409 event pairs, 23 based on Foata normal form. 22/688 useless extension candidates. Maximal degree in co-relation 1184. Up to 118 conditions per place. [2023-09-01 15:10:57,020 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-09-01 15:10:57,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 742 flow [2023-09-01 15:10:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 15:10:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 15:10:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1401 transitions. [2023-09-01 15:10:57,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212053571428571 [2023-09-01 15:10:57,024 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1401 transitions. [2023-09-01 15:10:57,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1401 transitions. [2023-09-01 15:10:57,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:57,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1401 transitions. [2023-09-01 15:10:57,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.75) internal successors, (1401), 12 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:57,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:57,033 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:57,033 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 283 flow. Second operand 12 states and 1401 transitions. [2023-09-01 15:10:57,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 742 flow [2023-09-01 15:10:57,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 700 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 15:10:57,037 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-09-01 15:10:57,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-09-01 15:10:57,039 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2023-09-01 15:10:57,039 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-09-01 15:10:57,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 113.54838709677419) internal successors, (3520), 31 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:57,042 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 15:10:57,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 15:10:57,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 15:10:57,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:57,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:57,250 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1] [2023-09-01 15:10:57,253 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 15:10:57,253 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 15:10:57,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 03:10:57 BasicIcfg [2023-09-01 15:10:57,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 15:10:57,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 15:10:57,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 15:10:57,257 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 15:10:57,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:39" (3/4) ... [2023-09-01 15:10:57,260 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 15:10:57,265 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 15:10:57,265 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 15:10:57,269 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-09-01 15:10:57,269 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-09-01 15:10:57,269 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 15:10:57,270 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 15:10:57,304 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 15:10:57,304 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 15:10:57,305 INFO L158 Benchmark]: Toolchain (without parser) took 18788.40ms. Allocated memory was 81.8MB in the beginning and 260.0MB in the end (delta: 178.3MB). Free memory was 58.0MB in the beginning and 148.7MB in the end (delta: -90.7MB). Peak memory consumption was 90.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:57,306 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 60.8MB. Free memory is still 38.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 15:10:57,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 625.16ms. Allocated memory is still 81.8MB. Free memory was 57.8MB in the beginning and 50.9MB in the end (delta: 6.9MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2023-09-01 15:10:57,306 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.12ms. Allocated memory is still 81.8MB. Free memory was 50.9MB in the beginning and 48.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:57,307 INFO L158 Benchmark]: Boogie Preprocessor took 52.62ms. Allocated memory is still 81.8MB. Free memory was 48.7MB in the beginning and 47.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:57,308 INFO L158 Benchmark]: RCFGBuilder took 460.91ms. Allocated memory is still 81.8MB. Free memory was 46.7MB in the beginning and 57.0MB in the end (delta: -10.3MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:57,308 INFO L158 Benchmark]: TraceAbstraction took 17528.74ms. Allocated memory was 81.8MB in the beginning and 260.0MB in the end (delta: 178.3MB). Free memory was 56.6MB in the beginning and 152.4MB in the end (delta: -95.8MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:57,308 INFO L158 Benchmark]: Witness Printer took 48.05ms. Allocated memory is still 260.0MB. Free memory was 152.4MB in the beginning and 148.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 15:10:57,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 60.8MB. Free memory is still 38.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 625.16ms. Allocated memory is still 81.8MB. Free memory was 57.8MB in the beginning and 50.9MB in the end (delta: 6.9MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.12ms. Allocated memory is still 81.8MB. Free memory was 50.9MB in the beginning and 48.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.62ms. Allocated memory is still 81.8MB. Free memory was 48.7MB in the beginning and 47.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 460.91ms. Allocated memory is still 81.8MB. Free memory was 46.7MB in the beginning and 57.0MB in the end (delta: -10.3MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * TraceAbstraction took 17528.74ms. Allocated memory was 81.8MB in the beginning and 260.0MB in the end (delta: 178.3MB). Free memory was 56.6MB in the beginning and 152.4MB in the end (delta: -95.8MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. * Witness Printer took 48.05ms. Allocated memory is still 260.0MB. Free memory was 152.4MB in the beginning and 148.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 117 PlacesBefore, 32 PlacesAfterwards, 118 TransitionsBefore, 30 TransitionsAfterwards, 1922 CoEnabledTransitionPairs, 7 FixpointIterations, 53 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 93 TotalNumberOfCompositions, 4363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2172, independent: 2001, independent conditional: 0, independent unconditional: 2001, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1031, independent: 1001, independent conditional: 0, independent unconditional: 1001, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2172, independent: 1000, independent conditional: 0, independent unconditional: 1000, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 1031, unknown conditional: 0, unknown unconditional: 1031] , Statistics on independence cache: Total cache size (in pairs): 118, Positive cache size: 105, Positive conditional cache size: 0, Positive unconditional cache size: 105, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 919]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 3 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: 17.4s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 673 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 574 mSDsluCounter, 101 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3064 IncrementalHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 37 mSDtfsCounter, 3064 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 411 SyntacticMatches, 22 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=6, InterpolantAutomatonStates: 63, 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 643 NumberOfCodeBlocks, 617 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 795 ConstructedInterpolants, 42 QuantifiedInterpolants, 5051 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1811 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 532/826 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 15:10:57,326 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 Result: TRUE