./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_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_60-invariant_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 ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 --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 17:55:41,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:55:41,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:55:41,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:55:41,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:55:41,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:55:41,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:55:41,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:55:41,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:55:41,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:55:41,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:55:41,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:55:41,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:55:41,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:55:41,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:55:41,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:55:41,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:55:41,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:55:41,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:55:41,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:55:41,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:55:41,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:55:41,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:55:41,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:55:41,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:55:41,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:55:41,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:55:41,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:55:41,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:55:41,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:55:41,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:55:41,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:55:41,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:55:41,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:55:41,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:55:41,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:55:41,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:55:41,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:55:41,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:55:41,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:55:41,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:55:41,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:55:41,517 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:55:41,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:55:41,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:55:41,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:55:41,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:55:41,521 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:55:41,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:55:41,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:55:41,522 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:55:41,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:55:41,523 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:55:41,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:55:41,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:55:41,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:55:41,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:55:41,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:55:41,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:55:41,524 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:55:41,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:55:41,524 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:55:41,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:55:41,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:55:41,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:55:41,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:55:41,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:55:41,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:55:41,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:55:41,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:55:41,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:55:41,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:55:41,527 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:55:41,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:55:41,527 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:55:41,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:55:41,528 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:55:41,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:55:41,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:55:41,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:55:41,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:55:41,867 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:55:41,867 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:55:41,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-30 17:55:43,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:55:43,429 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:55:43,430 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-30 17:55:43,441 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6d9070e/b68afdfb9694496bb480ce97a14661a8/FLAGc4fffb2f1 [2023-08-30 17:55:43,454 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6d9070e/b68afdfb9694496bb480ce97a14661a8 [2023-08-30 17:55:43,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:55:43,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:55:43,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:55:43,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:55:43,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:55:43,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:43,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a144fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43, skipping insertion in model container [2023-08-30 17:55:43,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:43,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:55:43,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:55:43,839 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_60-invariant_racefree.i[30176,30189] [2023-08-30 17:55:43,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:55:43,879 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:55:43,928 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_60-invariant_racefree.i[30176,30189] [2023-08-30 17:55:43,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:55:43,984 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:55:43,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43 WrapperNode [2023-08-30 17:55:43,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:55:43,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:55:43,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:55:43,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:55:43,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,055 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2023-08-30 17:55:44,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:55:44,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:55:44,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:55:44,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:55:44,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:55:44,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:55:44,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:55:44,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:55:44,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (1/1) ... [2023-08-30 17:55:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:55:44,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:55:44,126 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 17:55:44,149 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 17:55:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:55:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:55:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:55:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:55:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:55:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:55:44,165 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:55:44,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:55:44,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:55:44,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:55:44,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:55:44,168 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 17:55:44,330 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:55:44,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:55:44,531 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:55:44,538 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:55:44,539 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-30 17:55:44,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:55:44 BoogieIcfgContainer [2023-08-30 17:55:44,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:55:44,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:55:44,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:55:44,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:55:44,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:55:43" (1/3) ... [2023-08-30 17:55:44,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5163c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:55:44, skipping insertion in model container [2023-08-30 17:55:44,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:43" (2/3) ... [2023-08-30 17:55:44,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5163c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:55:44, skipping insertion in model container [2023-08-30 17:55:44,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:55:44" (3/3) ... [2023-08-30 17:55:44,549 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-08-30 17:55:44,556 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:55:44,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:55:44,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 17:55:44,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:55:44,647 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:55:44,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 284 flow [2023-08-30 17:55:44,787 INFO L130 PetriNetUnfolder]: 33/193 cut-off events. [2023-08-30 17:55:44,788 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:55:44,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 193 events. 33/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 633 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-30 17:55:44,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 138 transitions, 284 flow [2023-08-30 17:55:44,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:44,808 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:44,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:44,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:44,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:44,870 INFO L130 PetriNetUnfolder]: 32/188 cut-off events. [2023-08-30 17:55:44,870 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:44,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 32/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-30 17:55:44,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 5490 [2023-08-30 17:55:47,265 INFO L134 LiptonReduction]: Checked pairs total: 14551 [2023-08-30 17:55:47,266 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-30 17:55:47,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:55:47,284 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;@6b495dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:47,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 17:55:47,289 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-08-30 17:55:47,289 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:47,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:47,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:55:47,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:55:47,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash 512707676, now seen corresponding path program 1 times [2023-08-30 17:55:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:47,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472511509] [2023-08-30 17:55:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:47,469 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 17:55:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:47,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472511509] [2023-08-30 17:55:47,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472511509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:47,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:47,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:55:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535994649] [2023-08-30 17:55:47,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:47,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:47,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:47,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 235 [2023-08-30 17:55:47,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 62 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 17:55:47,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:47,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 235 [2023-08-30 17:55:47,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:47,659 INFO L130 PetriNetUnfolder]: 211/547 cut-off events. [2023-08-30 17:55:47,659 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:47,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 547 events. 211/547 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2758 event pairs, 0 based on Foata normal form. 88/558 useless extension candidates. Maximal degree in co-relation 964. Up to 421 conditions per place. [2023-08-30 17:55:47,667 INFO L137 encePairwiseOnDemand]: 213/235 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-30 17:55:47,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 215 flow [2023-08-30 17:55:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:55:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:55:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-30 17:55:47,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5758865248226951 [2023-08-30 17:55:47,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-30 17:55:47,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-30 17:55:47,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:47,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-30 17:55:47,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 17:55:47,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 17:55:47,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 17:55:47,707 INFO L175 Difference]: Start difference. First operand has 46 places, 62 transitions, 129 flow. Second operand 3 states and 406 transitions. [2023-08-30 17:55:47,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 215 flow [2023-08-30 17:55:47,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:55:47,713 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 97 flow [2023-08-30 17:55:47,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 17:55:47,719 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-30 17:55:47,719 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 97 flow [2023-08-30 17:55:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 17:55:47,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:47,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:47,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:55:47,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:55:47,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:47,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1308553740, now seen corresponding path program 1 times [2023-08-30 17:55:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687158112] [2023-08-30 17:55:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:47,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:47,867 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 17:55:47,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:47,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687158112] [2023-08-30 17:55:47,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687158112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:47,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:47,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:55:47,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209119760] [2023-08-30 17:55:47,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:47,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:47,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:47,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 235 [2023-08-30 17:55:47,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 17:55:47,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:47,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 235 [2023-08-30 17:55:47,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:48,024 INFO L130 PetriNetUnfolder]: 210/518 cut-off events. [2023-08-30 17:55:48,024 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 17:55:48,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 518 events. 210/518 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2541 event pairs, 104 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 998. Up to 317 conditions per place. [2023-08-30 17:55:48,027 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 37 selfloop transitions, 4 changer transitions 6/56 dead transitions. [2023-08-30 17:55:48,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 217 flow [2023-08-30 17:55:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:55:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:55:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-30 17:55:48,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526241134751773 [2023-08-30 17:55:48,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-30 17:55:48,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-30 17:55:48,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:48,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-30 17:55:48,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 17:55:48,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 17:55:48,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 17:55:48,035 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 97 flow. Second operand 3 states and 371 transitions. [2023-08-30 17:55:48,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 217 flow [2023-08-30 17:55:48,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:55:48,037 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 121 flow [2023-08-30 17:55:48,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-30 17:55:48,038 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-30 17:55:48,038 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 121 flow [2023-08-30 17:55:48,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 17:55:48,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:48,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:48,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 17:55:48,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:55:48,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1926413753, now seen corresponding path program 1 times [2023-08-30 17:55:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:48,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051263099] [2023-08-30 17:55:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:48,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:48,100 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 17:55:48,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:48,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051263099] [2023-08-30 17:55:48,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051263099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:55:48,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16304894] [2023-08-30 17:55:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:48,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:55:48,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:55:48,104 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 17:55:48,114 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 17:55:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:55:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:55:48,278 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 17:55:48,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:55:48,319 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 17:55:48,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16304894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:55:48,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:55:48,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 17:55:48,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859331650] [2023-08-30 17:55:48,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:55:48,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:55:48,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:55:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:55:48,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 235 [2023-08-30 17:55:48,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 17:55:48,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:48,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 235 [2023-08-30 17:55:48,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:48,376 INFO L130 PetriNetUnfolder]: 12/35 cut-off events. [2023-08-30 17:55:48,376 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 17:55:48,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 35 events. 12/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 7/42 useless extension candidates. Maximal degree in co-relation 80. Up to 26 conditions per place. [2023-08-30 17:55:48,376 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-30 17:55:48,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 81 flow [2023-08-30 17:55:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:55:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:55:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-08-30 17:55:48,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829787234042553 [2023-08-30 17:55:48,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-08-30 17:55:48,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-08-30 17:55:48,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:48,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-08-30 17:55:48,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states 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 17:55:48,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states 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 17:55:48,382 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states 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 17:55:48,383 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 121 flow. Second operand 4 states and 454 transitions. [2023-08-30 17:55:48,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 81 flow [2023-08-30 17:55:48,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 72 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 17:55:48,383 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-08-30 17:55:48,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-08-30 17:55:48,384 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -29 predicate places. [2023-08-30 17:55:48,384 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-08-30 17:55:48,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 17:55:48,394 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 17:55:48,394 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 17:55:48,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 17:55:48,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 17:55:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:55:48,596 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:55:48,598 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 17:55:48,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 284 flow [2023-08-30 17:55:48,619 INFO L130 PetriNetUnfolder]: 33/193 cut-off events. [2023-08-30 17:55:48,619 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:55:48,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 193 events. 33/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 633 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-30 17:55:48,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 138 transitions, 284 flow [2023-08-30 17:55:48,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:48,622 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:48,622 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:48,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:48,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 133 transitions, 271 flow [2023-08-30 17:55:48,650 INFO L130 PetriNetUnfolder]: 32/188 cut-off events. [2023-08-30 17:55:48,653 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:48,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 32/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-30 17:55:48,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 5490 [2023-08-30 17:55:50,767 INFO L134 LiptonReduction]: Checked pairs total: 14481 [2023-08-30 17:55:50,768 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-30 17:55:50,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:55:50,771 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;@6b495dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:50,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:55:50,775 INFO L130 PetriNetUnfolder]: 8/41 cut-off events. [2023-08-30 17:55:50,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:50,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:50,776 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:55:50,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:55:50,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1580414617, now seen corresponding path program 1 times [2023-08-30 17:55:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486558305] [2023-08-30 17:55:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:50,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:50,794 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:55:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:50,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:55:50,818 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:55:50,818 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:55:50,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:55:50,818 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:55:50,819 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:55:50,820 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:55:50,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:55:50,839 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:55:50,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:50,869 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-08-30 17:55:50,869 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:55:50,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-30 17:55:50,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:50,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:50,874 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:50,874 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:50,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:50,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:50,900 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-08-30 17:55:50,909 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:55:50,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-30 17:55:50,919 INFO L119 LiptonReduction]: Number of co-enabled transitions 16020 [2023-08-30 17:55:53,180 INFO L134 LiptonReduction]: Checked pairs total: 45797 [2023-08-30 17:55:53,180 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 17:55:53,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:55:53,191 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;@6b495dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:53,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:55:53,195 INFO L130 PetriNetUnfolder]: 1/18 cut-off events. [2023-08-30 17:55:53,195 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:53,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:53,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:55:53,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:55:53,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash 945798373, now seen corresponding path program 1 times [2023-08-30 17:55:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:53,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609093650] [2023-08-30 17:55:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:53,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:53,244 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 17:55:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609093650] [2023-08-30 17:55:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609093650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:53,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:53,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:55:53,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198255234] [2023-08-30 17:55:53,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:53,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:53,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:53,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 310 [2023-08-30 17:55:53,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 95 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:55:53,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:53,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 310 [2023-08-30 17:55:53,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:54,110 INFO L130 PetriNetUnfolder]: 5106/8979 cut-off events. [2023-08-30 17:55:54,111 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 17:55:54,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16936 conditions, 8979 events. 5106/8979 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 67707 event pairs, 2208 based on Foata normal form. 1727/9079 useless extension candidates. Maximal degree in co-relation 2572. Up to 7850 conditions per place. [2023-08-30 17:55:54,160 INFO L137 encePairwiseOnDemand]: 281/310 looper letters, 58 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 17:55:54,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 304 flow [2023-08-30 17:55:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:55:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:55:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-30 17:55:54,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709677419354838 [2023-08-30 17:55:54,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-30 17:55:54,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-30 17:55:54,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:54,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-30 17:55:54,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 17:55:54,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 17:55:54,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 17:55:54,169 INFO L175 Difference]: Start difference. First operand has 70 places, 95 transitions, 208 flow. Second operand 3 states and 531 transitions. [2023-08-30 17:55:54,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 304 flow [2023-08-30 17:55:54,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:55:54,173 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2023-08-30 17:55:54,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-08-30 17:55:54,174 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-30 17:55:54,174 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2023-08-30 17:55:54,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:55:54,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:54,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:54,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 17:55:54,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:55:54,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1876051564, now seen corresponding path program 1 times [2023-08-30 17:55:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271747075] [2023-08-30 17:55:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:54,257 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 17:55:54,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:54,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271747075] [2023-08-30 17:55:54,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271747075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:54,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:54,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:55:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610977084] [2023-08-30 17:55:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:54,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:54,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:54,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 310 [2023-08-30 17:55:54,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 17:55:54,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:54,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 310 [2023-08-30 17:55:54,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:55,360 INFO L130 PetriNetUnfolder]: 7094/12509 cut-off events. [2023-08-30 17:55:55,360 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 17:55:55,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24099 conditions, 12509 events. 7094/12509 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 96959 event pairs, 3492 based on Foata normal form. 0/10628 useless extension candidates. Maximal degree in co-relation 24053. Up to 7633 conditions per place. [2023-08-30 17:55:55,423 INFO L137 encePairwiseOnDemand]: 293/310 looper letters, 78 selfloop transitions, 10 changer transitions 1/106 dead transitions. [2023-08-30 17:55:55,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 422 flow [2023-08-30 17:55:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:55:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:55:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-30 17:55:55,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546236559139785 [2023-08-30 17:55:55,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-30 17:55:55,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-30 17:55:55,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:55,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-30 17:55:55,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 17:55:55,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 17:55:55,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 17:55:55,430 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 3 states and 508 transitions. [2023-08-30 17:55:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 422 flow [2023-08-30 17:55:55,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:55:55,434 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 246 flow [2023-08-30 17:55:55,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-30 17:55:55,435 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-30 17:55:55,435 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 246 flow [2023-08-30 17:55:55,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 17:55:55,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:55,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:55,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:55:55,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:55:55,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1266956077, now seen corresponding path program 1 times [2023-08-30 17:55:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:55,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683090471] [2023-08-30 17:55:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:55,561 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 17:55:55,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683090471] [2023-08-30 17:55:55,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683090471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:55:55,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936503796] [2023-08-30 17:55:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:55,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:55:55,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:55:55,568 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 17:55:55,592 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 17:55:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:55:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:55:55,664 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 17:55:55,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:55:55,686 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 17:55:55,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936503796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:55:55,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:55:55,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:55:55,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960663234] [2023-08-30 17:55:55,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:55:55,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:55:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:55:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:55:55,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 310 [2023-08-30 17:55:55,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 17:55:55,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:55,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 310 [2023-08-30 17:55:55,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:55,761 INFO L130 PetriNetUnfolder]: 133/251 cut-off events. [2023-08-30 17:55:55,761 INFO L131 PetriNetUnfolder]: For 83/102 co-relation queries the response was YES. [2023-08-30 17:55:55,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 251 events. 133/251 cut-off events. For 83/102 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1006 event pairs, 6 based on Foata normal form. 37/284 useless extension candidates. Maximal degree in co-relation 587. Up to 171 conditions per place. [2023-08-30 17:55:55,762 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2023-08-30 17:55:55,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 154 flow [2023-08-30 17:55:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:55:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:55:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 751 transitions. [2023-08-30 17:55:55,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48451612903225805 [2023-08-30 17:55:55,765 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 751 transitions. [2023-08-30 17:55:55,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 751 transitions. [2023-08-30 17:55:55,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:55,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 751 transitions. [2023-08-30 17:55:55,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states 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 17:55:55,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 17:55:55,771 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 17:55:55,771 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 246 flow. Second operand 5 states and 751 transitions. [2023-08-30 17:55:55,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 154 flow [2023-08-30 17:55:55,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:55:55,774 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-30 17:55:55,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, 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=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-30 17:55:55,775 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -39 predicate places. [2023-08-30 17:55:55,775 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-30 17:55:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 17:55:55,776 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 17:55:55,776 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 17:55:55,776 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 17:55:55,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 17:55:55,792 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 17:55:55,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 17:55:55,983 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:55:55,983 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:55:55,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:56,010 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-08-30 17:55:56,010 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:55:56,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-30 17:55:56,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:56,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:56,015 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:56,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:56,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:56,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-30 17:55:56,041 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-08-30 17:55:56,041 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:55:56,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-30 17:55:56,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 16020 [2023-08-30 17:55:58,366 INFO L134 LiptonReduction]: Checked pairs total: 46004 [2023-08-30 17:55:58,367 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 17:55:58,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:55:58,371 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;@6b495dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:58,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:55:58,377 INFO L130 PetriNetUnfolder]: 27/102 cut-off events. [2023-08-30 17:55:58,378 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:55:58,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:58,378 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:55:58,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:55:58,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1502892358, now seen corresponding path program 1 times [2023-08-30 17:55:58,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:58,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534343870] [2023-08-30 17:55:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:58,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:58,400 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:55:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:58,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:55:58,426 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:55:58,426 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:55:58,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 17:55:58,426 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:55:58,427 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:55:58,427 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:55:58,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:55:58,455 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:55:58,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-08-30 17:55:58,517 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-08-30 17:55:58,517 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:55:58,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-08-30 17:55:58,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 232 transitions, 494 flow [2023-08-30 17:55:58,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 232 transitions, 494 flow [2023-08-30 17:55:58,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:58,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 232 transitions, 494 flow [2023-08-30 17:55:58,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 232 transitions, 494 flow [2023-08-30 17:55:58,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-08-30 17:55:58,566 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-08-30 17:55:58,566 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:55:58,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-08-30 17:55:58,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 30510 [2023-08-30 17:56:01,021 INFO L134 LiptonReduction]: Checked pairs total: 92347 [2023-08-30 17:56:01,022 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-30 17:56:01,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:56:01,023 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;@6b495dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:56:01,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 17:56:01,026 INFO L130 PetriNetUnfolder]: 1/18 cut-off events. [2023-08-30 17:56:01,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:56:01,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:56:01,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:56:01,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1480965945, now seen corresponding path program 1 times [2023-08-30 17:56:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791896855] [2023-08-30 17:56:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:01,054 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 17:56:01,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:56:01,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791896855] [2023-08-30 17:56:01,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791896855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:56:01,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:56:01,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:56:01,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994815783] [2023-08-30 17:56:01,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:56:01,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:56:01,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:56:01,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:56:01,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:56:01,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 389 [2023-08-30 17:56:01,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 124 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 17:56:01,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:56:01,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 389 [2023-08-30 17:56:01,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:56:10,303 INFO L130 PetriNetUnfolder]: 95946/144583 cut-off events. [2023-08-30 17:56:10,303 INFO L131 PetriNetUnfolder]: For 1715/1715 co-relation queries the response was YES. [2023-08-30 17:56:10,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276062 conditions, 144583 events. 95946/144583 cut-off events. For 1715/1715 co-relation queries the response was YES. Maximal size of possible extension queue 4007. Compared 1228550 event pairs, 56969 based on Foata normal form. 22989/145036 useless extension candidates. Maximal degree in co-relation 18306. Up to 130015 conditions per place. [2023-08-30 17:56:11,306 INFO L137 encePairwiseOnDemand]: 352/389 looper letters, 73 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-30 17:56:11,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 105 transitions, 390 flow [2023-08-30 17:56:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:56:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:56:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-08-30 17:56:11,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638389031705227 [2023-08-30 17:56:11,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-08-30 17:56:11,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-08-30 17:56:11,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:56:11,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-08-30 17:56:11,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 17:56:11,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states 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 17:56:11,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states 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 17:56:11,315 INFO L175 Difference]: Start difference. First operand has 91 places, 124 transitions, 278 flow. Second operand 3 states and 658 transitions. [2023-08-30 17:56:11,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 105 transitions, 390 flow [2023-08-30 17:56:11,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:56:11,320 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 222 flow [2023-08-30 17:56:11,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-08-30 17:56:11,321 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 3 predicate places. [2023-08-30 17:56:11,321 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 222 flow [2023-08-30 17:56:11,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 17:56:11,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:11,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:56:11,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:56:11,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:56:11,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1247976831, now seen corresponding path program 1 times [2023-08-30 17:56:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:11,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255541623] [2023-08-30 17:56:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:11,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:11,361 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 17:56:11,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:56:11,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255541623] [2023-08-30 17:56:11,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255541623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:56:11,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:56:11,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:56:11,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519846670] [2023-08-30 17:56:11,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:56:11,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:56:11,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:56:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:56:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:56:11,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 389 [2023-08-30 17:56:11,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 17:56:11,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:56:11,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 389 [2023-08-30 17:56:11,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:56:29,395 INFO L130 PetriNetUnfolder]: 215844/316289 cut-off events. [2023-08-30 17:56:29,395 INFO L131 PetriNetUnfolder]: For 3798/3798 co-relation queries the response was YES. [2023-08-30 17:56:29,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619572 conditions, 316289 events. 215844/316289 cut-off events. For 3798/3798 co-relation queries the response was YES. Maximal size of possible extension queue 8603. Compared 2728024 event pairs, 95310 based on Foata normal form. 0/276463 useless extension candidates. Maximal degree in co-relation 619515. Up to 188917 conditions per place. [2023-08-30 17:56:30,748 INFO L137 encePairwiseOnDemand]: 368/389 looper letters, 111 selfloop transitions, 12 changer transitions 1/143 dead transitions. [2023-08-30 17:56:30,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 143 transitions, 581 flow [2023-08-30 17:56:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:56:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:56:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2023-08-30 17:56:30,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467009425878321 [2023-08-30 17:56:30,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2023-08-30 17:56:30,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2023-08-30 17:56:30,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:56:30,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2023-08-30 17:56:30,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 17:56:30,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states 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 17:56:30,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states 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 17:56:30,759 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 222 flow. Second operand 3 states and 638 transitions. [2023-08-30 17:56:30,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 143 transitions, 581 flow [2023-08-30 17:56:30,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 143 transitions, 579 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:56:30,769 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 318 flow [2023-08-30 17:56:30,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2023-08-30 17:56:30,771 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 6 predicate places. [2023-08-30 17:56:30,771 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 318 flow [2023-08-30 17:56:30,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 17:56:30,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:30,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:56:30,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:56:30,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:56:30,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1479957955, now seen corresponding path program 1 times [2023-08-30 17:56:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:30,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186567598] [2023-08-30 17:56:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:30,813 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 17:56:30,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:56:30,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186567598] [2023-08-30 17:56:30,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186567598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:56:30,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309185587] [2023-08-30 17:56:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:30,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:56:30,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:56:30,816 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 17:56:30,818 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 17:56:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:30,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:56:30,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:56:30,913 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 17:56:30,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:56:30,939 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 17:56:30,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309185587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:56:30,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:56:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:56:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887814026] [2023-08-30 17:56:30,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:56:30,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:56:30,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:56:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:56:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:56:30,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 389 [2023-08-30 17:56:30,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 181.71428571428572) internal successors, (1272), 7 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 17:56:30,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:56:30,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 389 [2023-08-30 17:56:30,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:56:31,153 INFO L130 PetriNetUnfolder]: 1986/3015 cut-off events. [2023-08-30 17:56:31,153 INFO L131 PetriNetUnfolder]: For 457/457 co-relation queries the response was YES. [2023-08-30 17:56:31,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6459 conditions, 3015 events. 1986/3015 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15195 event pairs, 75 based on Foata normal form. 322/3291 useless extension candidates. Maximal degree in co-relation 6446. Up to 1932 conditions per place. [2023-08-30 17:56:31,158 INFO L137 encePairwiseOnDemand]: 386/389 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2023-08-30 17:56:31,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 265 flow [2023-08-30 17:56:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:56:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:56:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1133 transitions. [2023-08-30 17:56:31,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48543273350471294 [2023-08-30 17:56:31,162 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1133 transitions. [2023-08-30 17:56:31,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1133 transitions. [2023-08-30 17:56:31,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:56:31,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1133 transitions. [2023-08-30 17:56:31,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.83333333333334) internal successors, (1133), 6 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states 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 17:56:31,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states 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 17:56:31,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states 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 17:56:31,169 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 318 flow. Second operand 6 states and 1133 transitions. [2023-08-30 17:56:31,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 265 flow [2023-08-30 17:56:31,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 261 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 17:56:31,171 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2023-08-30 17:56:31,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2023-08-30 17:56:31,172 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -50 predicate places. [2023-08-30 17:56:31,172 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2023-08-30 17:56:31,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.71428571428572) internal successors, (1272), 7 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 17:56:31,173 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 17:56:31,173 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 17:56:31,173 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 17:56:31,173 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 17:56:31,173 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 17:56:31,184 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 17:56:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:56:31,378 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:56:31,379 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:56:31,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-08-30 17:56:31,618 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-08-30 17:56:31,618 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:56:31,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-08-30 17:56:31,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 232 transitions, 494 flow [2023-08-30 17:56:31,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 232 transitions, 494 flow [2023-08-30 17:56:31,625 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:56:31,626 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 232 transitions, 494 flow [2023-08-30 17:56:31,626 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 232 transitions, 494 flow [2023-08-30 17:56:31,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-08-30 17:56:31,665 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-08-30 17:56:31,665 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:56:31,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-08-30 17:56:31,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 30510 [2023-08-30 17:56:33,791 INFO L134 LiptonReduction]: Checked pairs total: 80675 [2023-08-30 17:56:33,791 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-30 17:56:33,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:56:33,792 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;@6b495dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:56:33,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:56:33,799 INFO L130 PetriNetUnfolder]: 46/164 cut-off events. [2023-08-30 17:56:33,799 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:56:33,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:33,800 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:56:33,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:56:33,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash 463521866, now seen corresponding path program 1 times [2023-08-30 17:56:33,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:33,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002284980] [2023-08-30 17:56:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:56:33,825 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:56:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:56:33,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:56:33,850 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:56:33,850 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:56:33,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 17:56:33,850 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:56:33,852 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:56:33,852 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:56:33,852 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:56:33,878 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:56:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 279 transitions, 602 flow [2023-08-30 17:56:33,955 INFO L130 PetriNetUnfolder]: 127/697 cut-off events. [2023-08-30 17:56:33,955 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:56:33,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 697 events. 127/697 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2947 event pairs, 6 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-08-30 17:56:33,964 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 279 transitions, 602 flow [2023-08-30 17:56:33,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 279 transitions, 602 flow [2023-08-30 17:56:33,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:56:33,970 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 279 transitions, 602 flow [2023-08-30 17:56:33,971 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 279 transitions, 602 flow [2023-08-30 17:56:33,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 279 transitions, 602 flow [2023-08-30 17:56:34,047 INFO L130 PetriNetUnfolder]: 127/697 cut-off events. [2023-08-30 17:56:34,047 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:56:34,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 697 events. 127/697 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2947 event pairs, 6 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-08-30 17:56:34,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 49320 [2023-08-30 17:56:36,471 INFO L134 LiptonReduction]: Checked pairs total: 159687 [2023-08-30 17:56:36,471 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-30 17:56:36,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:56:36,473 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;@6b495dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:56:36,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 17:56:36,474 INFO L130 PetriNetUnfolder]: 1/14 cut-off events. [2023-08-30 17:56:36,474 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:56:36,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:56:36,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:56:36,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 17:56:36,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:56:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2123709681, now seen corresponding path program 1 times [2023-08-30 17:56:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:56:36,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549722347] [2023-08-30 17:56:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:56:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:56:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:56:36,502 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 17:56:36,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:56:36,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549722347] [2023-08-30 17:56:36,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549722347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:56:36,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:56:36,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:56:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413944697] [2023-08-30 17:56:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:56:36,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:56:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:56:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:56:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:56:36,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 470 [2023-08-30 17:56:36,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 157 transitions, 358 flow. Second operand has 3 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 17:56:36,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:56:36,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 470 [2023-08-30 17:56:36,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand