./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 12:49:01,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 12:49:01,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 12:49:01,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 12:49:01,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 12:49:01,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 12:49:01,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 12:49:01,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 12:49:01,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 12:49:01,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 12:49:01,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 12:49:01,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 12:49:01,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 12:49:01,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 12:49:01,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 12:49:01,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 12:49:01,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 12:49:01,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 12:49:01,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 12:49:01,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 12:49:01,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 12:49:01,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 12:49:01,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 12:49:01,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 12:49:01,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 12:49:01,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 12:49:01,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 12:49:01,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 12:49:01,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 12:49:01,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 12:49:01,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 12:49:01,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 12:49:01,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 12:49:01,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 12:49:01,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 12:49:01,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 12:49:01,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 12:49:01,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 12:49:01,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 12:49:01,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 12:49:01,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 12:49:01,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 12:49:01,326 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 12:49:01,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 12:49:01,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 12:49:01,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 12:49:01,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 12:49:01,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 12:49:01,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 12:49:01,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 12:49:01,329 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 12:49:01,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 12:49:01,330 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 12:49:01,331 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 12:49:01,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 12:49:01,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 12:49:01,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 12:49:01,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 12:49:01,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 12:49:01,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 12:49:01,332 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 12:49:01,332 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 12:49:01,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 12:49:01,333 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 12:49:01,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 12:49:01,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 12:49:01,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 12:49:01,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 12:49:01,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:49:01,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 12:49:01,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 12:49:01,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 12:49:01,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 12:49:01,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 12:49:01,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 12:49:01,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 12:49:01,335 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 12:49:01,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 12:49:01,336 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 12:49:01,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 12:49:01,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 12:49:01,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 12:49:01,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 12:49:01,669 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 12:49:01,669 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 12:49:01,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-30 12:49:02,764 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 12:49:03,009 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 12:49:03,010 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-30 12:49:03,021 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5bb41cdb/96fa21a3c80645c2958b26b809037257/FLAGada786aef [2023-08-30 12:49:03,032 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5bb41cdb/96fa21a3c80645c2958b26b809037257 [2023-08-30 12:49:03,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 12:49:03,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 12:49:03,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 12:49:03,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 12:49:03,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 12:49:03,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a5d95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03, skipping insertion in model container [2023-08-30 12:49:03,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 12:49:03,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 12:49:03,315 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-30 12:49:03,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:49:03,337 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 12:49:03,398 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-30 12:49:03,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:49:03,465 INFO L208 MainTranslator]: Completed translation [2023-08-30 12:49:03,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03 WrapperNode [2023-08-30 12:49:03,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 12:49:03,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 12:49:03,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 12:49:03,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 12:49:03,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,533 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 198 [2023-08-30 12:49:03,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 12:49:03,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 12:49:03,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 12:49:03,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 12:49:03,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 12:49:03,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 12:49:03,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 12:49:03,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 12:49:03,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (1/1) ... [2023-08-30 12:49:03,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:49:03,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:49:03,592 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 12:49:03,618 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 12:49:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 12:49:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 12:49:03,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 12:49:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 12:49:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 12:49:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 12:49:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 12:49:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 12:49:03,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 12:49:03,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 12:49:03,630 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 12:49:03,761 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 12:49:03,765 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 12:49:04,070 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 12:49:04,231 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 12:49:04,231 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 12:49:04,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:49:04 BoogieIcfgContainer [2023-08-30 12:49:04,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 12:49:04,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 12:49:04,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 12:49:04,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 12:49:04,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:49:03" (1/3) ... [2023-08-30 12:49:04,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24111f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:49:04, skipping insertion in model container [2023-08-30 12:49:04,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:49:03" (2/3) ... [2023-08-30 12:49:04,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24111f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:49:04, skipping insertion in model container [2023-08-30 12:49:04,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:49:04" (3/3) ... [2023-08-30 12:49:04,242 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-08-30 12:49:04,250 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 12:49:04,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 12:49:04,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 12:49:04,259 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 12:49:04,341 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 12:49:04,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-08-30 12:49:04,449 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-08-30 12:49:04,449 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 12:49:04,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-08-30 12:49:04,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 133 transitions, 271 flow [2023-08-30 12:49:04,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 133 transitions, 271 flow [2023-08-30 12:49:04,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 12:49:04,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 133 transitions, 271 flow [2023-08-30 12:49:04,501 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 133 transitions, 271 flow [2023-08-30 12:49:04,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-08-30 12:49:04,548 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-08-30 12:49:04,549 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 12:49:04,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-08-30 12:49:04,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 2522 [2023-08-30 12:49:09,363 INFO L134 LiptonReduction]: Checked pairs total: 3076 [2023-08-30 12:49:09,363 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-30 12:49:09,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 12:49:09,391 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;@4bd0892b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 12:49:09,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-30 12:49:09,398 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 12:49:09,399 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 12:49:09,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:49:09,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 12:49:09,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:49:09,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:49:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1550590541, now seen corresponding path program 1 times [2023-08-30 12:49:09,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:49:09,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474705757] [2023-08-30 12:49:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:49:09,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:49:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 12:49:09,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 12:49:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 12:49:09,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 12:49:09,614 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 12:49:09,616 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 21 remaining) [2023-08-30 12:49:09,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 21 remaining) [2023-08-30 12:49:09,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 21 remaining) [2023-08-30 12:49:09,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 21 remaining) [2023-08-30 12:49:09,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 21 remaining) [2023-08-30 12:49:09,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 21 remaining) [2023-08-30 12:49:09,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 21 remaining) [2023-08-30 12:49:09,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 21 remaining) [2023-08-30 12:49:09,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 21 remaining) [2023-08-30 12:49:09,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 21 remaining) [2023-08-30 12:49:09,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 21 remaining) [2023-08-30 12:49:09,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 21 remaining) [2023-08-30 12:49:09,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 21 remaining) [2023-08-30 12:49:09,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 21 remaining) [2023-08-30 12:49:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 21 remaining) [2023-08-30 12:49:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 21 remaining) [2023-08-30 12:49:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 21 remaining) [2023-08-30 12:49:09,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 21 remaining) [2023-08-30 12:49:09,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 21 remaining) [2023-08-30 12:49:09,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 21 remaining) [2023-08-30 12:49:09,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 21 remaining) [2023-08-30 12:49:09,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 12:49:09,625 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 12:49:09,629 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 12:49:09,629 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 12:49:09,691 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 12:49:09,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-08-30 12:49:09,730 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-08-30 12:49:09,730 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 12:49:09,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-08-30 12:49:09,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 474 flow [2023-08-30 12:49:09,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 231 transitions, 474 flow [2023-08-30 12:49:09,737 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 12:49:09,738 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 231 transitions, 474 flow [2023-08-30 12:49:09,738 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 231 transitions, 474 flow [2023-08-30 12:49:09,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-08-30 12:49:09,788 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-08-30 12:49:09,789 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 12:49:09,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-08-30 12:49:09,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 24056 [2023-08-30 12:49:14,985 INFO L134 LiptonReduction]: Checked pairs total: 65438 [2023-08-30 12:49:14,986 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-08-30 12:49:14,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 12:49:14,989 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;@4bd0892b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 12:49:14,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-30 12:49:14,993 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-08-30 12:49:14,993 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 12:49:14,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:49:14,994 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 12:49:14,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-30 12:49:14,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:49:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1068023603, now seen corresponding path program 1 times [2023-08-30 12:49:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:49:14,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643433155] [2023-08-30 12:49:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:49:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:49:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 12:49:15,016 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 12:49:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 12:49:15,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 12:49:15,034 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 12:49:15,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2023-08-30 12:49:15,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 31 remaining) [2023-08-30 12:49:15,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 31 remaining) [2023-08-30 12:49:15,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 31 remaining) [2023-08-30 12:49:15,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 31 remaining) [2023-08-30 12:49:15,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 31 remaining) [2023-08-30 12:49:15,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 31 remaining) [2023-08-30 12:49:15,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 31 remaining) [2023-08-30 12:49:15,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 31 remaining) [2023-08-30 12:49:15,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 31 remaining) [2023-08-30 12:49:15,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 31 remaining) [2023-08-30 12:49:15,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 31 remaining) [2023-08-30 12:49:15,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 31 remaining) [2023-08-30 12:49:15,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 31 remaining) [2023-08-30 12:49:15,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 31 remaining) [2023-08-30 12:49:15,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 31 remaining) [2023-08-30 12:49:15,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 31 remaining) [2023-08-30 12:49:15,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 31 remaining) [2023-08-30 12:49:15,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 31 remaining) [2023-08-30 12:49:15,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 31 remaining) [2023-08-30 12:49:15,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 31 remaining) [2023-08-30 12:49:15,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 31 remaining) [2023-08-30 12:49:15,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 31 remaining) [2023-08-30 12:49:15,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 31 remaining) [2023-08-30 12:49:15,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 31 remaining) [2023-08-30 12:49:15,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 31 remaining) [2023-08-30 12:49:15,040 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 31 remaining) [2023-08-30 12:49:15,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 31 remaining) [2023-08-30 12:49:15,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 31 remaining) [2023-08-30 12:49:15,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 31 remaining) [2023-08-30 12:49:15,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 31 remaining) [2023-08-30 12:49:15,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 12:49:15,042 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 12:49:15,042 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 12:49:15,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 12:49:15,091 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 12:49:15,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-08-30 12:49:15,168 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-08-30 12:49:15,169 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 12:49:15,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-08-30 12:49:15,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 329 transitions, 679 flow [2023-08-30 12:49:15,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 329 transitions, 679 flow [2023-08-30 12:49:15,180 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 12:49:15,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 329 transitions, 679 flow [2023-08-30 12:49:15,181 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 329 transitions, 679 flow [2023-08-30 12:49:15,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-08-30 12:49:15,240 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-08-30 12:49:15,241 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 12:49:15,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-08-30 12:49:15,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 64602 [2023-08-30 12:49:21,472 INFO L134 LiptonReduction]: Checked pairs total: 172575 [2023-08-30 12:49:21,473 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-08-30 12:49:21,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 12:49:21,475 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;@4bd0892b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 12:49:21,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-08-30 12:49:21,480 INFO L130 PetriNetUnfolder]: 4/35 cut-off events. [2023-08-30 12:49:21,480 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 12:49:21,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:49:21,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:49:21,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-08-30 12:49:21,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:49:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -657837876, now seen corresponding path program 1 times [2023-08-30 12:49:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:49:21,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937675632] [2023-08-30 12:49:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:49:21,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:49:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:49:21,602 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 12:49:21,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:49:21,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937675632] [2023-08-30 12:49:21,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937675632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:49:21,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:49:21,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 12:49:21,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231038921] [2023-08-30 12:49:21,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:49:21,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:49:21,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:49:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:49:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 12:49:21,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 576 [2023-08-30 12:49:21,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 144 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 283.5) internal successors, (1134), 4 states have internal predecessors, (1134), 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 12:49:21,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:49:21,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 576 [2023-08-30 12:49:21,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:49:32,386 INFO L130 PetriNetUnfolder]: 79015/128465 cut-off events. [2023-08-30 12:49:32,386 INFO L131 PetriNetUnfolder]: For 3583/3583 co-relation queries the response was YES. [2023-08-30 12:49:32,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236052 conditions, 128465 events. 79015/128465 cut-off events. For 3583/3583 co-relation queries the response was YES. Maximal size of possible extension queue 3329. Compared 1202103 event pairs, 5937 based on Foata normal form. 0/90104 useless extension candidates. Maximal degree in co-relation 133704. Up to 76016 conditions per place. [2023-08-30 12:49:33,329 INFO L137 encePairwiseOnDemand]: 560/576 looper letters, 232 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2023-08-30 12:49:33,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 297 transitions, 1128 flow [2023-08-30 12:49:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 12:49:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 12:49:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1671 transitions. [2023-08-30 12:49:33,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802083333333333 [2023-08-30 12:49:33,353 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1671 transitions. [2023-08-30 12:49:33,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1671 transitions. [2023-08-30 12:49:33,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:49:33,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1671 transitions. [2023-08-30 12:49:33,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.2) internal successors, (1671), 5 states have internal predecessors, (1671), 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 12:49:33,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 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 12:49:33,382 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 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 12:49:33,384 INFO L175 Difference]: Start difference. First operand has 130 places, 144 transitions, 309 flow. Second operand 5 states and 1671 transitions. [2023-08-30 12:49:33,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 297 transitions, 1128 flow [2023-08-30 12:49:33,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 297 transitions, 1116 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 12:49:33,398 INFO L231 Difference]: Finished difference. Result has 136 places, 144 transitions, 361 flow [2023-08-30 12:49:33,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=136, PETRI_TRANSITIONS=144} [2023-08-30 12:49:33,405 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 6 predicate places. [2023-08-30 12:49:33,406 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 144 transitions, 361 flow [2023-08-30 12:49:33,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.5) internal successors, (1134), 4 states have internal predecessors, (1134), 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 12:49:33,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:49:33,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:49:33,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 12:49:33,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-08-30 12:49:33,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:49:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1941011566, now seen corresponding path program 1 times [2023-08-30 12:49:33,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:49:33,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739629880] [2023-08-30 12:49:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:49:33,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:49:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:49:33,524 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 12:49:33,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:49:33,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739629880] [2023-08-30 12:49:33,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739629880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:49:33,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:49:33,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:49:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707027397] [2023-08-30 12:49:33,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:49:33,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:49:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:49:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:49:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:49:33,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 576 [2023-08-30 12:49:33,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 144 transitions, 361 flow. Second operand has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 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 12:49:33,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:49:33,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 576 [2023-08-30 12:49:33,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:49:52,243 INFO L130 PetriNetUnfolder]: 174099/245465 cut-off events. [2023-08-30 12:49:52,243 INFO L131 PetriNetUnfolder]: For 31634/35602 co-relation queries the response was YES. [2023-08-30 12:49:52,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506325 conditions, 245465 events. 174099/245465 cut-off events. For 31634/35602 co-relation queries the response was YES. Maximal size of possible extension queue 11109. Compared 2033246 event pairs, 60070 based on Foata normal form. 7769/205138 useless extension candidates. Maximal degree in co-relation 375648. Up to 227979 conditions per place. [2023-08-30 12:49:54,064 INFO L137 encePairwiseOnDemand]: 551/576 looper letters, 130 selfloop transitions, 4 changer transitions 0/176 dead transitions. [2023-08-30 12:49:54,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 176 transitions, 721 flow [2023-08-30 12:49:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:49:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:49:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 949 transitions. [2023-08-30 12:49:54,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491898148148148 [2023-08-30 12:49:54,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 949 transitions. [2023-08-30 12:49:54,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 949 transitions. [2023-08-30 12:49:54,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:49:54,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 949 transitions. [2023-08-30 12:49:54,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 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 12:49:54,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 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 12:49:54,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 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 12:49:54,080 INFO L175 Difference]: Start difference. First operand has 136 places, 144 transitions, 361 flow. Second operand 3 states and 949 transitions. [2023-08-30 12:49:54,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 176 transitions, 721 flow [2023-08-30 12:49:54,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 176 transitions, 721 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 12:49:54,139 INFO L231 Difference]: Finished difference. Result has 139 places, 147 transitions, 427 flow [2023-08-30 12:49:54,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=427, PETRI_PLACES=139, PETRI_TRANSITIONS=147} [2023-08-30 12:49:54,141 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 9 predicate places. [2023-08-30 12:49:54,141 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 147 transitions, 427 flow [2023-08-30 12:49:54,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 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 12:49:54,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:49:54,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 12:49:54,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 12:49:54,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-08-30 12:49:54,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:49:54,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1213916751, now seen corresponding path program 1 times [2023-08-30 12:49:54,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:49:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565320017] [2023-08-30 12:49:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:49:54,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:49:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 12:49:54,166 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 12:49:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 12:49:54,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 12:49:54,185 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 12:49:54,185 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2023-08-30 12:49:54,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (39 of 41 remaining) [2023-08-30 12:49:54,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (38 of 41 remaining) [2023-08-30 12:49:54,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (37 of 41 remaining) [2023-08-30 12:49:54,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (36 of 41 remaining) [2023-08-30 12:49:54,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (35 of 41 remaining) [2023-08-30 12:49:54,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (34 of 41 remaining) [2023-08-30 12:49:54,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 41 remaining) [2023-08-30 12:49:54,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 41 remaining) [2023-08-30 12:49:54,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 41 remaining) [2023-08-30 12:49:54,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 41 remaining) [2023-08-30 12:49:54,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 41 remaining) [2023-08-30 12:49:54,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 41 remaining) [2023-08-30 12:49:54,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 41 remaining) [2023-08-30 12:49:54,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 41 remaining) [2023-08-30 12:49:54,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 41 remaining) [2023-08-30 12:49:54,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 41 remaining) [2023-08-30 12:49:54,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 41 remaining) [2023-08-30 12:49:54,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 41 remaining) [2023-08-30 12:49:54,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 41 remaining) [2023-08-30 12:49:54,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 41 remaining) [2023-08-30 12:49:54,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 41 remaining) [2023-08-30 12:49:54,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 41 remaining) [2023-08-30 12:49:54,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 41 remaining) [2023-08-30 12:49:54,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 41 remaining) [2023-08-30 12:49:54,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 41 remaining) [2023-08-30 12:49:54,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 41 remaining) [2023-08-30 12:49:54,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 41 remaining) [2023-08-30 12:49:54,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 41 remaining) [2023-08-30 12:49:54,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 41 remaining) [2023-08-30 12:49:54,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 41 remaining) [2023-08-30 12:49:54,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 41 remaining) [2023-08-30 12:49:54,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 41 remaining) [2023-08-30 12:49:54,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 41 remaining) [2023-08-30 12:49:54,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 41 remaining) [2023-08-30 12:49:54,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 41 remaining) [2023-08-30 12:49:54,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 41 remaining) [2023-08-30 12:49:54,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 41 remaining) [2023-08-30 12:49:54,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 41 remaining) [2023-08-30 12:49:54,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 41 remaining) [2023-08-30 12:49:54,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 41 remaining) [2023-08-30 12:49:54,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 12:49:54,197 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 12:49:54,197 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 12:49:54,197 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 12:49:54,260 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 12:49:54,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-08-30 12:49:54,473 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-08-30 12:49:54,473 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 12:49:54,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-08-30 12:49:54,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 399 places, 427 transitions, 886 flow [2023-08-30 12:49:54,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 427 transitions, 886 flow [2023-08-30 12:49:54,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 12:49:54,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 427 transitions, 886 flow [2023-08-30 12:49:54,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 427 transitions, 886 flow [2023-08-30 12:49:54,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-08-30 12:49:54,569 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-08-30 12:49:54,570 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 12:49:54,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-08-30 12:49:54,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 124160 [2023-08-30 12:50:02,629 INFO L134 LiptonReduction]: Checked pairs total: 353281 [2023-08-30 12:50:02,629 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-08-30 12:50:02,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 12:50:02,631 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;@4bd0892b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 12:50:02,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-30 12:50:02,639 INFO L130 PetriNetUnfolder]: 4/36 cut-off events. [2023-08-30 12:50:02,640 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 12:50:02,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:50:02,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:50:02,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-08-30 12:50:02,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:50:02,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1634028145, now seen corresponding path program 1 times [2023-08-30 12:50:02,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:50:02,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403172558] [2023-08-30 12:50:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:50:02,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:50:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:50:02,717 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 12:50:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:50:02,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403172558] [2023-08-30 12:50:02,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403172558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:50:02,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:50:02,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 12:50:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856840122] [2023-08-30 12:50:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:50:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:50:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:50:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:50:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 12:50:02,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 752 [2023-08-30 12:50:02,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 193 transitions, 418 flow. Second operand has 4 states, 4 states have (on average 368.5) internal successors, (1474), 4 states have internal predecessors, (1474), 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 12:50:02,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:50:02,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 752 [2023-08-30 12:50:02,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand