./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:15:39,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:15:39,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:15:39,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:15:39,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:15:39,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:15:39,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:15:39,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:15:39,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:15:39,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:15:39,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:15:39,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:15:39,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:15:39,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:15:39,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:15:39,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:15:39,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:15:39,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:15:39,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:15:39,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:15:39,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:15:39,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:15:39,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:15:39,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:15:39,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:15:39,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:15:39,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:15:39,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:15:39,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:15:39,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:15:39,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:15:39,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:15:39,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:15:39,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:15:39,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:15:39,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:15:39,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:15:39,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:15:39,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:15:39,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:15:39,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:15:39,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:15:39,144 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:15:39,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:15:39,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:15:39,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:15:39,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:15:39,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:15:39,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:15:39,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:15:39,147 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:15:39,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:15:39,148 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:15:39,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:15:39,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:15:39,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:15:39,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:15:39,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:15:39,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:15:39,149 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:15:39,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:15:39,149 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:15:39,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:15:39,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:15:39,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:15:39,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:15:39,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:15:39,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:15:39,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:15:39,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:15:39,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:15:39,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:15:39,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:15:39,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:15:39,151 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:15:39,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:15:39,151 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:15:39,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:15:39,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:15:39,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:15:39,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:15:39,412 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:15:39,412 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:15:39,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-08-30 18:15:40,501 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:15:40,736 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:15:40,737 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-08-30 18:15:40,762 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56336ac07/c246e792592449e7a886be2161459954/FLAG1d040c35c [2023-08-30 18:15:40,773 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56336ac07/c246e792592449e7a886be2161459954 [2023-08-30 18:15:40,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:15:40,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:15:40,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:15:40,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:15:40,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:15:40,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:40" (1/1) ... [2023-08-30 18:15:40,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4c202f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:40, skipping insertion in model container [2023-08-30 18:15:40,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:40" (1/1) ... [2023-08-30 18:15:40,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:15:40,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:15:41,099 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_87-lists_racefree.i[47038,47051] [2023-08-30 18:15:41,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:15:41,226 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:15:41,254 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_87-lists_racefree.i[47038,47051] [2023-08-30 18:15:41,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:15:41,328 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:15:41,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41 WrapperNode [2023-08-30 18:15:41,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:15:41,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:15:41,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:15:41,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:15:41,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,398 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 228 [2023-08-30 18:15:41,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:15:41,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:15:41,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:15:41,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:15:41,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,445 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:15:41,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:15:41,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:15:41,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:15:41,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (1/1) ... [2023-08-30 18:15:41,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:15:41,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:41,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 18:15:41,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 18:15:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:15:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 18:15:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 18:15:41,563 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 18:15:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:15:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:15:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 18:15:41,564 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 18:15:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:15:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:15:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:15:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:15:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 18:15:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:15:41,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:15:41,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:15:41,566 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:15:41,723 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:15:41,731 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:15:42,088 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:15:42,094 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:15:42,096 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 18:15:42,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:42 BoogieIcfgContainer [2023-08-30 18:15:42,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:15:42,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:15:42,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:15:42,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:15:42,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:15:40" (1/3) ... [2023-08-30 18:15:42,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f782369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:42, skipping insertion in model container [2023-08-30 18:15:42,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:41" (2/3) ... [2023-08-30 18:15:42,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f782369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:42, skipping insertion in model container [2023-08-30 18:15:42,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:42" (3/3) ... [2023-08-30 18:15:42,107 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-08-30 18:15:42,113 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:15:42,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:15:42,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:15:42,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:15:42,217 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 18:15:42,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 229 transitions, 480 flow [2023-08-30 18:15:42,381 INFO L130 PetriNetUnfolder]: 54/427 cut-off events. [2023-08-30 18:15:42,382 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-08-30 18:15:42,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 54/427 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1691 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 219. Up to 8 conditions per place. [2023-08-30 18:15:42,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 229 transitions, 480 flow [2023-08-30 18:15:42,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 226 transitions, 466 flow [2023-08-30 18:15:42,404 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:15:42,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 226 transitions, 466 flow [2023-08-30 18:15:42,426 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 226 transitions, 466 flow [2023-08-30 18:15:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 226 transitions, 466 flow [2023-08-30 18:15:42,478 INFO L130 PetriNetUnfolder]: 50/414 cut-off events. [2023-08-30 18:15:42,478 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:15:42,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 414 events. 50/414 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1592 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2023-08-30 18:15:42,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 15278 [2023-08-30 18:15:46,914 INFO L134 LiptonReduction]: Checked pairs total: 23287 [2023-08-30 18:15:46,915 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-30 18:15:46,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:15:46,937 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;@646e9cea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:15:46,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:15:46,948 INFO L130 PetriNetUnfolder]: 8/77 cut-off events. [2023-08-30 18:15:46,948 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:15:46,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:46,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:46,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:15:46,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash -649298106, now seen corresponding path program 1 times [2023-08-30 18:15:46,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:46,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068981357] [2023-08-30 18:15:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:46,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:15:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068981357] [2023-08-30 18:15:47,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068981357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:15:47,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:15:47,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:15:47,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683057721] [2023-08-30 18:15:47,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:15:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:15:47,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:15:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:15:47,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 409 [2023-08-30 18:15:47,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 65 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:47,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:47,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 409 [2023-08-30 18:15:47,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:47,667 INFO L130 PetriNetUnfolder]: 3149/5388 cut-off events. [2023-08-30 18:15:47,668 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-08-30 18:15:47,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10378 conditions, 5388 events. 3149/5388 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 31127 event pairs, 2924 based on Foata normal form. 267/4740 useless extension candidates. Maximal degree in co-relation 9366. Up to 4918 conditions per place. [2023-08-30 18:15:47,682 INFO L137 encePairwiseOnDemand]: 395/409 looper letters, 36 selfloop transitions, 2 changer transitions 14/55 dead transitions. [2023-08-30 18:15:47,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 220 flow [2023-08-30 18:15:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:15:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:15:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2023-08-30 18:15:47,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403422982885085 [2023-08-30 18:15:47,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2023-08-30 18:15:47,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2023-08-30 18:15:47,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:47,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2023-08-30 18:15:47,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:47,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:47,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:47,715 INFO L175 Difference]: Start difference. First operand has 54 places, 65 transitions, 144 flow. Second operand 3 states and 663 transitions. [2023-08-30 18:15:47,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 220 flow [2023-08-30 18:15:47,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:15:47,723 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 103 flow [2023-08-30 18:15:47,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-30 18:15:47,727 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-30 18:15:47,727 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 103 flow [2023-08-30 18:15:47,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:47,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:47,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:47,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:15:47,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:15:47,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:47,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1812130781, now seen corresponding path program 1 times [2023-08-30 18:15:47,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:47,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98454982] [2023-08-30 18:15:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:47,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:15:47,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:47,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98454982] [2023-08-30 18:15:47,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98454982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:47,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968304507] [2023-08-30 18:15:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:47,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:47,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:47,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:15:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:48,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 18:15:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:15:48,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:15:48,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968304507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:15:48,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:15:48,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 18:15:48,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857688183] [2023-08-30 18:15:48,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:15:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:15:48,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:15:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:15:48,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 409 [2023-08-30 18:15:48,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:48,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:48,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 409 [2023-08-30 18:15:48,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:48,273 INFO L130 PetriNetUnfolder]: 1468/2480 cut-off events. [2023-08-30 18:15:48,274 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 18:15:48,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4928 conditions, 2480 events. 1468/2480 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12776 event pairs, 640 based on Foata normal form. 0/2091 useless extension candidates. Maximal degree in co-relation 4915. Up to 2370 conditions per place. [2023-08-30 18:15:48,282 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 44 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-30 18:15:48,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 215 flow [2023-08-30 18:15:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:15:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:15:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 650 transitions. [2023-08-30 18:15:48,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297473512632437 [2023-08-30 18:15:48,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 650 transitions. [2023-08-30 18:15:48,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 650 transitions. [2023-08-30 18:15:48,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:48,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 650 transitions. [2023-08-30 18:15:48,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:48,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:48,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:48,289 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 103 flow. Second operand 3 states and 650 transitions. [2023-08-30 18:15:48,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 215 flow [2023-08-30 18:15:48,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 211 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:15:48,291 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 107 flow [2023-08-30 18:15:48,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 18:15:48,291 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-30 18:15:48,292 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 107 flow [2023-08-30 18:15:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:48,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:48,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:48,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 18:15:48,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:48,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:15:48,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash -783143084, now seen corresponding path program 1 times [2023-08-30 18:15:48,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:48,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907097397] [2023-08-30 18:15:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:15:48,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:48,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907097397] [2023-08-30 18:15:48,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907097397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:48,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557956688] [2023-08-30 18:15:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:48,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:48,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:48,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:48,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:15:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:15:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:15:48,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:15:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:15:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557956688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:48,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:48,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:15:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815606716] [2023-08-30 18:15:48,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:48,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:15:48,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:15:48,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:15:48,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 409 [2023-08-30 18:15:48,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 107 flow. Second operand has 7 states, 7 states have (on average 203.14285714285714) internal successors, (1422), 7 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:48,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:48,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 409 [2023-08-30 18:15:48,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:49,109 INFO L130 PetriNetUnfolder]: 1468/2514 cut-off events. [2023-08-30 18:15:49,109 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 18:15:49,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4989 conditions, 2514 events. 1468/2514 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12754 event pairs, 1368 based on Foata normal form. 3/2129 useless extension candidates. Maximal degree in co-relation 4961. Up to 2380 conditions per place. [2023-08-30 18:15:49,119 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 36 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-08-30 18:15:49,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 201 flow [2023-08-30 18:15:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:15:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:15:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1244 transitions. [2023-08-30 18:15:49,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069274653626732 [2023-08-30 18:15:49,122 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1244 transitions. [2023-08-30 18:15:49,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1244 transitions. [2023-08-30 18:15:49,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:49,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1244 transitions. [2023-08-30 18:15:49,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.33333333333334) internal successors, (1244), 6 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,129 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,129 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 107 flow. Second operand 6 states and 1244 transitions. [2023-08-30 18:15:49,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 201 flow [2023-08-30 18:15:49,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:15:49,131 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 139 flow [2023-08-30 18:15:49,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=139, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-08-30 18:15:49,132 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-08-30 18:15:49,132 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 139 flow [2023-08-30 18:15:49,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.14285714285714) internal successors, (1422), 7 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:49,135 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:49,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:49,341 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,SelfDestructingSolverStorable2 [2023-08-30 18:15:49,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:15:49,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2103321559, now seen corresponding path program 2 times [2023-08-30 18:15:49,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:49,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910702108] [2023-08-30 18:15:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:15:49,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:49,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910702108] [2023-08-30 18:15:49,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910702108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:49,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173212504] [2023-08-30 18:15:49,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:15:49,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:49,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:49,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:49,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:15:49,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:15:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:15:49,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:15:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:15:49,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:15:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:15:49,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173212504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:49,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:49,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 18:15:49,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748972579] [2023-08-30 18:15:49,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:49,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:15:49,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:49,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:15:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:15:49,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 409 [2023-08-30 18:15:49,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 139 flow. Second operand has 14 states, 14 states have (on average 199.35714285714286) internal successors, (2791), 14 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:49,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 409 [2023-08-30 18:15:49,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:49,880 INFO L130 PetriNetUnfolder]: 17/58 cut-off events. [2023-08-30 18:15:49,880 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-30 18:15:49,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 58 events. 17/58 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 1 based on Foata normal form. 15/73 useless extension candidates. Maximal degree in co-relation 155. Up to 34 conditions per place. [2023-08-30 18:15:49,881 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-30 18:15:49,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 198 flow [2023-08-30 18:15:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:15:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:15:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2798 transitions. [2023-08-30 18:15:49,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48864827104435904 [2023-08-30 18:15:49,886 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2798 transitions. [2023-08-30 18:15:49,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2798 transitions. [2023-08-30 18:15:49,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:49,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2798 transitions. [2023-08-30 18:15:49,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 199.85714285714286) internal successors, (2798), 14 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 409.0) internal successors, (6135), 15 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 409.0) internal successors, (6135), 15 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,901 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 139 flow. Second operand 14 states and 2798 transitions. [2023-08-30 18:15:49,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 198 flow [2023-08-30 18:15:49,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 182 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 18:15:49,903 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-30 18:15:49,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-30 18:15:49,906 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -15 predicate places. [2023-08-30 18:15:49,906 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-30 18:15:49,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 199.35714285714286) internal successors, (2791), 14 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:49,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 18:15:49,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 18:15:49,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:50,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:50,117 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-08-30 18:15:50,118 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 18:15:50,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 229 transitions, 480 flow [2023-08-30 18:15:50,152 INFO L130 PetriNetUnfolder]: 54/427 cut-off events. [2023-08-30 18:15:50,152 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-08-30 18:15:50,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 54/427 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1691 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 219. Up to 8 conditions per place. [2023-08-30 18:15:50,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 229 transitions, 480 flow [2023-08-30 18:15:50,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 227 transitions, 470 flow [2023-08-30 18:15:50,156 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:15:50,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 227 transitions, 470 flow [2023-08-30 18:15:50,157 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 227 transitions, 470 flow [2023-08-30 18:15:50,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 470 flow [2023-08-30 18:15:50,179 INFO L130 PetriNetUnfolder]: 50/415 cut-off events. [2023-08-30 18:15:50,179 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-08-30 18:15:50,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 415 events. 50/415 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1613 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2023-08-30 18:15:50,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 15336 [2023-08-30 18:15:54,166 INFO L134 LiptonReduction]: Checked pairs total: 23781 [2023-08-30 18:15:54,166 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 18:15:54,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:15:54,171 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;@646e9cea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:15:54,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:15:54,174 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-08-30 18:15:54,174 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:15:54,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:54,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-30 18:15:54,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:15:54,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash -956369368, now seen corresponding path program 1 times [2023-08-30 18:15:54,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:54,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098417914] [2023-08-30 18:15:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:54,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:54,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098417914] [2023-08-30 18:15:54,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098417914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:15:54,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:15:54,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:15:54,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569147869] [2023-08-30 18:15:54,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:15:54,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:15:54,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:54,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:15:54,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:15:54,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 413 [2023-08-30 18:15:54,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 65 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:54,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:54,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 413 [2023-08-30 18:15:54,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:54,580 INFO L130 PetriNetUnfolder]: 3149/5354 cut-off events. [2023-08-30 18:15:54,580 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2023-08-30 18:15:54,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10347 conditions, 5354 events. 3149/5354 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 30582 event pairs, 2924 based on Foata normal form. 276/4722 useless extension candidates. Maximal degree in co-relation 9343. Up to 4918 conditions per place. [2023-08-30 18:15:54,591 INFO L137 encePairwiseOnDemand]: 399/413 looper letters, 37 selfloop transitions, 2 changer transitions 9/55 dead transitions. [2023-08-30 18:15:54,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 222 flow [2023-08-30 18:15:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:15:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:15:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2023-08-30 18:15:54,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351089588377724 [2023-08-30 18:15:54,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2023-08-30 18:15:54,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2023-08-30 18:15:54,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:54,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2023-08-30 18:15:54,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:54,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:54,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:54,599 INFO L175 Difference]: Start difference. First operand has 54 places, 65 transitions, 146 flow. Second operand 3 states and 663 transitions. [2023-08-30 18:15:54,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 222 flow [2023-08-30 18:15:54,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:15:54,603 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 112 flow [2023-08-30 18:15:54,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-08-30 18:15:54,606 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-30 18:15:54,606 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 112 flow [2023-08-30 18:15:54,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:54,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:54,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:54,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 18:15:54,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:15:54,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1793730092, now seen corresponding path program 1 times [2023-08-30 18:15:54,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:54,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327027602] [2023-08-30 18:15:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:54,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327027602] [2023-08-30 18:15:54,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327027602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:54,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978531527] [2023-08-30 18:15:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:54,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:54,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:54,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:15:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:54,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:15:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:54,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:15:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:54,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978531527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:54,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:15:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890870015] [2023-08-30 18:15:54,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:54,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:15:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:15:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:15:54,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 413 [2023-08-30 18:15:54,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:54,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:54,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 413 [2023-08-30 18:15:54,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:55,005 INFO L130 PetriNetUnfolder]: 1269/2252 cut-off events. [2023-08-30 18:15:55,005 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 18:15:55,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4350 conditions, 2252 events. 1269/2252 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11201 event pairs, 1188 based on Foata normal form. 0/1913 useless extension candidates. Maximal degree in co-relation 4337. Up to 2050 conditions per place. [2023-08-30 18:15:55,014 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 37 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-08-30 18:15:55,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 208 flow [2023-08-30 18:15:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:15:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:15:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1245 transitions. [2023-08-30 18:15:55,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024213075060533 [2023-08-30 18:15:55,017 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1245 transitions. [2023-08-30 18:15:55,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1245 transitions. [2023-08-30 18:15:55,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:55,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1245 transitions. [2023-08-30 18:15:55,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,023 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 112 flow. Second operand 6 states and 1245 transitions. [2023-08-30 18:15:55,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 208 flow [2023-08-30 18:15:55,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:15:55,024 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 144 flow [2023-08-30 18:15:55,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-30 18:15:55,025 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-30 18:15:55,025 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 144 flow [2023-08-30 18:15:55,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:55,026 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-30 18:15:55,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:55,232 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 [2023-08-30 18:15:55,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:15:55,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash 5035816, now seen corresponding path program 2 times [2023-08-30 18:15:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:55,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163196314] [2023-08-30 18:15:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:55,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:55,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163196314] [2023-08-30 18:15:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163196314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:55,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137975285] [2023-08-30 18:15:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:15:55,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:55,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:55,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:15:55,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:15:55,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:15:55,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:15:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:55,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:15:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:55,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137975285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:55,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:55,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 18:15:55,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364240829] [2023-08-30 18:15:55,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:55,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:15:55,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:15:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:15:55,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 413 [2023-08-30 18:15:55,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 201.30769230769232) internal successors, (2617), 13 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:55,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 413 [2023-08-30 18:15:55,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:55,858 INFO L130 PetriNetUnfolder]: 1269/2258 cut-off events. [2023-08-30 18:15:55,858 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-30 18:15:55,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4387 conditions, 2258 events. 1269/2258 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11203 event pairs, 1188 based on Foata normal form. 6/1926 useless extension candidates. Maximal degree in co-relation 4328. Up to 2050 conditions per place. [2023-08-30 18:15:55,869 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 37 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-08-30 18:15:55,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 276 flow [2023-08-30 18:15:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:15:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:15:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2454 transitions. [2023-08-30 18:15:55,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49515738498789347 [2023-08-30 18:15:55,874 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2454 transitions. [2023-08-30 18:15:55,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2454 transitions. [2023-08-30 18:15:55,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:55,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2454 transitions. [2023-08-30 18:15:55,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 204.5) internal successors, (2454), 12 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,886 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,887 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 144 flow. Second operand 12 states and 2454 transitions. [2023-08-30 18:15:55,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 276 flow [2023-08-30 18:15:55,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 262 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:15:55,889 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 214 flow [2023-08-30 18:15:55,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-08-30 18:15:55,890 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2023-08-30 18:15:55,890 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 214 flow [2023-08-30 18:15:55,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 201.30769230769232) internal successors, (2617), 13 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:55,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:55,892 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 18:15:55,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:56,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:56,114 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:15:56,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 123713704, now seen corresponding path program 3 times [2023-08-30 18:15:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713252951] [2023-08-30 18:15:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:15:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713252951] [2023-08-30 18:15:56,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713252951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093409463] [2023-08-30 18:15:56,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:15:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:56,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:56,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 18:19:26,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 18:19:26,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:19:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 18:19:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:19:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:19:26,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:19:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:19:26,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093409463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:19:26,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:19:26,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-30 18:19:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936038095] [2023-08-30 18:19:26,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:19:26,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:19:26,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:19:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-30 18:19:26,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 413 [2023-08-30 18:19:26,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 214 flow. Second operand has 25 states, 25 states have (on average 201.16) internal successors, (5029), 25 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:26,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:26,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 413 [2023-08-30 18:19:26,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:26,579 INFO L130 PetriNetUnfolder]: 1269/2270 cut-off events. [2023-08-30 18:19:26,579 INFO L131 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2023-08-30 18:19:26,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4471 conditions, 2270 events. 1269/2270 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11200 event pairs, 1188 based on Foata normal form. 12/1944 useless extension candidates. Maximal degree in co-relation 4334. Up to 2050 conditions per place. [2023-08-30 18:19:26,586 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 37 selfloop transitions, 23 changer transitions 0/67 dead transitions. [2023-08-30 18:19:26,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 67 transitions, 430 flow [2023-08-30 18:19:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 18:19:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 18:19:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4872 transitions. [2023-08-30 18:19:26,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915254237288136 [2023-08-30 18:19:26,593 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4872 transitions. [2023-08-30 18:19:26,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4872 transitions. [2023-08-30 18:19:26,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:26,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4872 transitions. [2023-08-30 18:19:26,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 203.0) internal successors, (4872), 24 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:26,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:26,612 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:26,612 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 214 flow. Second operand 24 states and 4872 transitions. [2023-08-30 18:19:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 67 transitions, 430 flow [2023-08-30 18:19:26,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 67 transitions, 358 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-08-30 18:19:26,614 INFO L231 Difference]: Finished difference. Result has 103 places, 67 transitions, 334 flow [2023-08-30 18:19:26,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=334, PETRI_PLACES=103, PETRI_TRANSITIONS=67} [2023-08-30 18:19:26,615 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2023-08-30 18:19:26,615 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 67 transitions, 334 flow [2023-08-30 18:19:26,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 201.16) internal successors, (5029), 25 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:26,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:26,616 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-08-30 18:19:26,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 18:19:26,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:26,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:19:26,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash 745544616, now seen corresponding path program 4 times [2023-08-30 18:19:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:26,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068268802] [2023-08-30 18:19:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:26,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:19:27,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:27,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068268802] [2023-08-30 18:19:27,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068268802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:19:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088251171] [2023-08-30 18:19:27,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:19:27,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:27,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:19:27,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:19:27,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 18:19:27,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:19:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:19:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 18:19:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:19:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:19:27,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:19:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:19:28,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088251171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:19:28,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:19:28,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-08-30 18:19:28,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432222478] [2023-08-30 18:19:28,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:19:28,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 18:19:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 18:19:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 18:19:28,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 413 [2023-08-30 18:19:28,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 67 transitions, 334 flow. Second operand has 49 states, 49 states have (on average 201.08163265306123) internal successors, (9853), 49 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:28,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:28,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 413 [2023-08-30 18:19:28,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:28,981 INFO L130 PetriNetUnfolder]: 1269/2294 cut-off events. [2023-08-30 18:19:28,981 INFO L131 PetriNetUnfolder]: For 5241/5241 co-relation queries the response was YES. [2023-08-30 18:19:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4615 conditions, 2294 events. 1269/2294 cut-off events. For 5241/5241 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11198 event pairs, 1188 based on Foata normal form. 24/1980 useless extension candidates. Maximal degree in co-relation 4346. Up to 2050 conditions per place. [2023-08-30 18:19:28,991 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 37 selfloop transitions, 47 changer transitions 0/91 dead transitions. [2023-08-30 18:19:28,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 91 transitions, 694 flow [2023-08-30 18:19:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 18:19:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 18:19:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9708 transitions. [2023-08-30 18:19:29,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897094430992736 [2023-08-30 18:19:29,003 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9708 transitions. [2023-08-30 18:19:29,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9708 transitions. [2023-08-30 18:19:29,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:29,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9708 transitions. [2023-08-30 18:19:29,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 202.25) internal successors, (9708), 48 states have internal predecessors, (9708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:29,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 413.0) internal successors, (20237), 49 states have internal predecessors, (20237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:29,035 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 413.0) internal successors, (20237), 49 states have internal predecessors, (20237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:29,035 INFO L175 Difference]: Start difference. First operand has 103 places, 67 transitions, 334 flow. Second operand 48 states and 9708 transitions. [2023-08-30 18:19:29,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 91 transitions, 694 flow [2023-08-30 18:19:29,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 91 transitions, 550 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-08-30 18:19:29,041 INFO L231 Difference]: Finished difference. Result has 163 places, 91 transitions, 574 flow [2023-08-30 18:19:29,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=574, PETRI_PLACES=163, PETRI_TRANSITIONS=91} [2023-08-30 18:19:29,042 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2023-08-30 18:19:29,042 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 91 transitions, 574 flow [2023-08-30 18:19:29,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 201.08163265306123) internal successors, (9853), 49 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:29,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:29,044 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-08-30 18:19:29,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 18:19:29,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:29,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:19:29,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2015665752, now seen corresponding path program 5 times [2023-08-30 18:19:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348917587] [2023-08-30 18:19:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:29,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:19:31,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:31,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348917587] [2023-08-30 18:19:31,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348917587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:19:31,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456051242] [2023-08-30 18:19:31,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:19:31,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:31,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:19:31,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:19:31,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process Killed by 15