./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/goblint-regression/28-race_reach_91-arrayloop2_racefree.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 ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:33:41,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:33:41,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:33:41,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:33:41,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:33:41,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:33:41,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:33:41,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:33:41,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:33:41,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:33:41,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:33:41,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:33:41,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:33:41,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:33:41,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:33:41,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:33:41,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:33:41,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:33:41,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:33:41,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:33:41,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:33:41,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:33:41,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:33:41,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:33:41,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:33:41,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:33:41,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:33:41,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:33:41,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:33:41,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:33:41,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:33:41,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:33:41,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:33:41,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:33:41,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:33:41,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:33:41,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:33:41,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:33:41,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:33:41,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:33:41,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:33:41,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:33:41,625 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:33:41,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:33:41,626 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:33:41,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:33:41,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:33:41,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:33:41,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:33:41,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:33:41,628 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:33:41,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:33:41,629 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:33:41,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:33:41,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:33:41,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:33:41,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:33:41,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:33:41,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:33:41,630 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:33:41,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:33:41,630 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:33:41,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:33:41,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:33:41,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:33:41,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:33:41,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:33:41,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:33:41,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:33:41,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:33:41,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:33:41,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:33:41,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:33:41,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:33:41,632 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:33:41,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:33:41,632 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:33:41,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:33:41,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:33:41,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:33:41,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:33:41,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:33:41,899 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:33:41,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-08-31 00:33:42,895 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:33:43,104 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:33:43,104 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-08-31 00:33:43,126 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f647d34a4/3b6562b89ad0408dac975b90312e48d5/FLAG6df02e9e4 [2023-08-31 00:33:43,141 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f647d34a4/3b6562b89ad0408dac975b90312e48d5 [2023-08-31 00:33:43,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:33:43,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:33:43,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:33:43,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:33:43,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:33:43,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6daaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43, skipping insertion in model container [2023-08-31 00:33:43,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:33:43,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:33:43,533 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-08-31 00:33:43,544 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,546 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,546 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,547 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:33:43,591 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:33:43,634 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-08-31 00:33:43,641 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,641 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,642 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,642 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-31 00:33:43,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:33:43,718 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:33:43,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43 WrapperNode [2023-08-31 00:33:43,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:33:43,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:33:43,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:33:43,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:33:43,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,773 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 184 [2023-08-31 00:33:43,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:33:43,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:33:43,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:33:43,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:33:43,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:33:43,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:33:43,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:33:43,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:33:43,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (1/1) ... [2023-08-31 00:33:43,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:33:43,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:33:43,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:33:43,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:33:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:33:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-31 00:33:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:33:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:33:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:33:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:33:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 00:33:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:33:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-31 00:33:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:33:43,861 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:33:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:33:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:33:43,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:33:43,862 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:33:43,979 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:33:43,981 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:33:44,295 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:33:44,301 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:33:44,304 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-31 00:33:44,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:33:44 BoogieIcfgContainer [2023-08-31 00:33:44,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:33:44,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:33:44,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:33:44,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:33:44,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:33:43" (1/3) ... [2023-08-31 00:33:44,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4306670f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:33:44, skipping insertion in model container [2023-08-31 00:33:44,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:33:43" (2/3) ... [2023-08-31 00:33:44,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4306670f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:33:44, skipping insertion in model container [2023-08-31 00:33:44,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:33:44" (3/3) ... [2023-08-31 00:33:44,312 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2023-08-31 00:33:44,317 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:33:44,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:33:44,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:33:44,323 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:33:44,415 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:33:44,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 184 transitions, 376 flow [2023-08-31 00:33:44,516 INFO L130 PetriNetUnfolder]: 26/200 cut-off events. [2023-08-31 00:33:44,516 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-31 00:33:44,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 200 events. 26/200 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 481 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 108. Up to 4 conditions per place. [2023-08-31 00:33:44,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 184 transitions, 376 flow [2023-08-31 00:33:44,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 179 transitions, 363 flow [2023-08-31 00:33:44,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:33:44,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 179 transitions, 363 flow [2023-08-31 00:33:44,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 179 transitions, 363 flow [2023-08-31 00:33:44,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 179 transitions, 363 flow [2023-08-31 00:33:44,587 INFO L130 PetriNetUnfolder]: 25/195 cut-off events. [2023-08-31 00:33:44,587 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:33:44,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 195 events. 25/195 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 423 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 108. Up to 4 conditions per place. [2023-08-31 00:33:44,590 INFO L119 LiptonReduction]: Number of co-enabled transitions 3828 [2023-08-31 00:33:55,045 WARN L222 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-31 00:34:00,173 WARN L222 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-31 00:34:05,745 WARN L222 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-31 00:34:12,239 WARN L222 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-31 00:34:12,474 INFO L134 LiptonReduction]: Checked pairs total: 3796 [2023-08-31 00:34:12,474 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-31 00:34:12,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:34:12,495 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;@1a67524f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:34:12,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 00:34:12,499 INFO L130 PetriNetUnfolder]: 3/17 cut-off events. [2023-08-31 00:34:12,500 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:34:12,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:34:12,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 00:34:12,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:34:12,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:34:12,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1767713619, now seen corresponding path program 1 times [2023-08-31 00:34:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:34:12,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337756872] [2023-08-31 00:34:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:34:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:34:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:34:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:34:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337756872] [2023-08-31 00:34:12,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337756872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:34:12,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:34:12,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:34:12,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388469312] [2023-08-31 00:34:12,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:34:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:34:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:34:12,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:34:12,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:34:12,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 358 [2023-08-31 00:34:12,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:12,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:34:12,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 358 [2023-08-31 00:34:12,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:34:12,900 INFO L130 PetriNetUnfolder]: 48/113 cut-off events. [2023-08-31 00:34:12,900 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:34:12,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 113 events. 48/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 33 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-08-31 00:34:12,902 INFO L137 encePairwiseOnDemand]: 345/358 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-31 00:34:12,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2023-08-31 00:34:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:34:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:34:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-31 00:34:12,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776536312849162 [2023-08-31 00:34:12,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-31 00:34:12,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-31 00:34:12,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:34:12,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-31 00:34:12,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:12,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:12,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:12,928 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 513 transitions. [2023-08-31 00:34:12,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2023-08-31 00:34:12,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:34:12,931 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 69 flow [2023-08-31 00:34:12,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-31 00:34:12,935 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-31 00:34:12,935 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 69 flow [2023-08-31 00:34:12,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:12,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:34:12,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:34:12,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:34:12,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:34:12,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:34:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash 549686375, now seen corresponding path program 1 times [2023-08-31 00:34:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:34:12,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971265143] [2023-08-31 00:34:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:12,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:34:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:34:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:34:12,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:34:12,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971265143] [2023-08-31 00:34:12,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971265143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:34:12,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:34:12,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:34:12,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802813986] [2023-08-31 00:34:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:34:12,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:34:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:34:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:34:12,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:34:13,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 358 [2023-08-31 00:34:13,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:34:13,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 358 [2023-08-31 00:34:13,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:34:13,152 INFO L130 PetriNetUnfolder]: 48/115 cut-off events. [2023-08-31 00:34:13,152 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:34:13,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 115 events. 48/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 33 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 212. Up to 100 conditions per place. [2023-08-31 00:34:13,153 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-31 00:34:13,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 119 flow [2023-08-31 00:34:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:34:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:34:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-31 00:34:13,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4664804469273743 [2023-08-31 00:34:13,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-31 00:34:13,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-31 00:34:13,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:34:13,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-31 00:34:13,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,160 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 69 flow. Second operand 3 states and 501 transitions. [2023-08-31 00:34:13,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 119 flow [2023-08-31 00:34:13,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:34:13,161 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 81 flow [2023-08-31 00:34:13,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-31 00:34:13,162 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-31 00:34:13,162 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 81 flow [2023-08-31 00:34:13,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:34:13,163 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:34:13,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:34:13,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:34:13,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:34:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash 333836697, now seen corresponding path program 1 times [2023-08-31 00:34:13,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:34:13,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755873923] [2023-08-31 00:34:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:13,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:34:13,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 00:34:13,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763240662] [2023-08-31 00:34:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:13,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:13,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:34:13,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:34:13,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:34:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:34:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:34:13,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:34:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:34:13,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:34:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:34:13,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:34:13,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755873923] [2023-08-31 00:34:13,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 00:34:13,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763240662] [2023-08-31 00:34:13,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763240662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:34:13,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:34:13,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-31 00:34:13,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355609651] [2023-08-31 00:34:13,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 00:34:13,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:34:13,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:34:13,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:34:13,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:34:13,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-31 00:34:13,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 81 flow. Second operand has 6 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:34:13,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-31 00:34:13,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:34:13,621 INFO L130 PetriNetUnfolder]: 48/121 cut-off events. [2023-08-31 00:34:13,621 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:34:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 121 events. 48/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 300 event pairs, 33 based on Foata normal form. 6/102 useless extension candidates. Maximal degree in co-relation 219. Up to 100 conditions per place. [2023-08-31 00:34:13,622 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-08-31 00:34:13,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 147 flow [2023-08-31 00:34:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:34:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:34:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 977 transitions. [2023-08-31 00:34:13,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548417132216015 [2023-08-31 00:34:13,624 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 977 transitions. [2023-08-31 00:34:13,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 977 transitions. [2023-08-31 00:34:13,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:34:13,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 977 transitions. [2023-08-31 00:34:13,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,630 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 81 flow. Second operand 6 states and 977 transitions. [2023-08-31 00:34:13,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 147 flow [2023-08-31 00:34:13,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 143 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:34:13,631 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 119 flow [2023-08-31 00:34:13,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-31 00:34:13,632 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-08-31 00:34:13,632 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 119 flow [2023-08-31 00:34:13,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:13,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:34:13,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:34:13,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 00:34:13,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:13,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:34:13,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:34:13,840 INFO L85 PathProgramCache]: Analyzing trace with hash 147605735, now seen corresponding path program 2 times [2023-08-31 00:34:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:34:13,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474075924] [2023-08-31 00:34:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:13,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:34:13,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 00:34:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915512609] [2023-08-31 00:34:13,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:34:13,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:34:13,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:34:13,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:34:14,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:34:14,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:34:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:34:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:34:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:34:14,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:34:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:34:14,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:34:14,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474075924] [2023-08-31 00:34:14,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 00:34:14,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915512609] [2023-08-31 00:34:14,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915512609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:34:14,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:34:14,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-31 00:34:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822576730] [2023-08-31 00:34:14,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 00:34:14,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 00:34:14,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:34:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 00:34:14,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-31 00:34:14,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-31 00:34:14,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 119 flow. Second operand has 12 states, 12 states have (on average 159.41666666666666) internal successors, (1913), 12 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:14,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:34:14,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-31 00:34:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:34:14,792 INFO L130 PetriNetUnfolder]: 48/133 cut-off events. [2023-08-31 00:34:14,792 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-31 00:34:14,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 133 events. 48/133 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 33 based on Foata normal form. 12/120 useless extension candidates. Maximal degree in co-relation 215. Up to 100 conditions per place. [2023-08-31 00:34:14,793 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-08-31 00:34:14,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 221 flow [2023-08-31 00:34:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:34:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:34:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1934 transitions. [2023-08-31 00:34:14,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45018621973929235 [2023-08-31 00:34:14,797 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1934 transitions. [2023-08-31 00:34:14,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1934 transitions. [2023-08-31 00:34:14,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:34:14,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1934 transitions. [2023-08-31 00:34:14,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.16666666666666) internal successors, (1934), 12 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:14,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 358.0) internal successors, (4654), 13 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:14,808 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 358.0) internal successors, (4654), 13 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:14,808 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 119 flow. Second operand 12 states and 1934 transitions. [2023-08-31 00:34:14,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 221 flow [2023-08-31 00:34:14,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 207 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:34:14,810 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 201 flow [2023-08-31 00:34:14,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=201, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-31 00:34:14,810 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-08-31 00:34:14,811 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 201 flow [2023-08-31 00:34:14,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.41666666666666) internal successors, (1913), 12 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:14,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:34:14,811 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:34:14,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 00:34:15,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-31 00:34:15,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:34:15,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:34:15,014 INFO L85 PathProgramCache]: Analyzing trace with hash -695915609, now seen corresponding path program 3 times [2023-08-31 00:34:15,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:34:15,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649936315] [2023-08-31 00:34:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:15,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:34:15,108 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 00:34:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29073999] [2023-08-31 00:34:15,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:34:15,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:15,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:34:15,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:34:15,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:34:15,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 00:34:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:34:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:34:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:34:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-31 00:34:15,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:34:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-31 00:34:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:34:15,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649936315] [2023-08-31 00:34:15,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 00:34:15,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29073999] [2023-08-31 00:34:15,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29073999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:34:15,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:34:15,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-31 00:34:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943894846] [2023-08-31 00:34:15,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 00:34:15,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:34:15,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:34:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:34:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:34:15,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-31 00:34:15,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 160.16666666666666) internal successors, (961), 6 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:15,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:34:15,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-31 00:34:15,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:34:15,889 INFO L130 PetriNetUnfolder]: 50/160 cut-off events. [2023-08-31 00:34:15,890 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-31 00:34:15,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 160 events. 50/160 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 285 event pairs, 33 based on Foata normal form. 3/138 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2023-08-31 00:34:15,891 INFO L137 encePairwiseOnDemand]: 354/358 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-08-31 00:34:15,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 694 flow [2023-08-31 00:34:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:34:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:34:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 983 transitions. [2023-08-31 00:34:15,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45763500931098694 [2023-08-31 00:34:15,894 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 983 transitions. [2023-08-31 00:34:15,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 983 transitions. [2023-08-31 00:34:15,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:34:15,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 983 transitions. [2023-08-31 00:34:15,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.83333333333334) internal successors, (983), 6 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:15,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:15,898 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:15,898 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 201 flow. Second operand 6 states and 983 transitions. [2023-08-31 00:34:15,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 694 flow [2023-08-31 00:34:15,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 500 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-31 00:34:15,902 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 236 flow [2023-08-31 00:34:15,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-31 00:34:15,903 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-08-31 00:34:15,903 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 236 flow [2023-08-31 00:34:15,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.16666666666666) internal successors, (961), 6 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:15,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:34:15,903 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-08-31 00:34:15,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 00:34:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:16,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:34:16,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:34:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash -666220907, now seen corresponding path program 4 times [2023-08-31 00:34:16,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:34:16,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111187306] [2023-08-31 00:34:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:34:16,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 00:34:16,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051467273] [2023-08-31 00:34:16,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:34:16,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:34:16,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:34:16,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 00:34:18,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:34:18,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:34:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 9505 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 00:34:18,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:34:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-08-31 00:34:18,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:34:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-08-31 00:34:18,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:34:18,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111187306] [2023-08-31 00:34:18,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 00:34:18,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051467273] [2023-08-31 00:34:18,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051467273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:34:18,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 00:34:18,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-31 00:34:18,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339986878] [2023-08-31 00:34:18,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 00:34:18,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 00:34:18,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:34:18,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 00:34:18,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-31 00:34:18,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-31 00:34:18,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 236 flow. Second operand has 24 states, 24 states have (on average 159.33333333333334) internal successors, (3824), 24 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:18,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:34:18,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-31 00:34:18,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:34:19,734 INFO L130 PetriNetUnfolder]: 50/208 cut-off events. [2023-08-31 00:34:19,734 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2023-08-31 00:34:19,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 208 events. 50/208 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 285 event pairs, 33 based on Foata normal form. 48/231 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2023-08-31 00:34:19,735 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-08-31 00:34:19,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 404 flow [2023-08-31 00:34:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 00:34:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 00:34:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3848 transitions. [2023-08-31 00:34:19,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478584729981378 [2023-08-31 00:34:19,742 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3848 transitions. [2023-08-31 00:34:19,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3848 transitions. [2023-08-31 00:34:19,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:34:19,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3848 transitions. [2023-08-31 00:34:19,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 160.33333333333334) internal successors, (3848), 24 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:19,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 358.0) internal successors, (8950), 25 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:19,767 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 358.0) internal successors, (8950), 25 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:19,767 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 236 flow. Second operand 24 states and 3848 transitions. [2023-08-31 00:34:19,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 404 flow [2023-08-31 00:34:19,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 396 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 00:34:19,770 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 470 flow [2023-08-31 00:34:19,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=470, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-08-31 00:34:19,772 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-08-31 00:34:19,773 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 470 flow [2023-08-31 00:34:19,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 159.33333333333334) internal successors, (3824), 24 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:34:19,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:34:19,774 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-08-31 00:34:19,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 00:34:19,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:19,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:34:19,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:34:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1410511509, now seen corresponding path program 5 times [2023-08-31 00:34:19,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:34:19,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904900016] [2023-08-31 00:34:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:34:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:34:20,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 00:34:20,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593177140] [2023-08-31 00:34:20,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 00:34:20,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:34:20,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:34:20,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:34:20,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15