./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.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/pthread-ext/46_monabsex2_vs.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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --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 16:37:48,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:37:48,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:37:48,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:37:48,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:37:48,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:37:48,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:37:48,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:37:48,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:37:48,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:37:48,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:37:48,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:37:48,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:37:48,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:37:48,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:37:48,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:37:48,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:37:48,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:37:48,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:37:48,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:37:48,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:37:48,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:37:48,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:37:48,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:37:48,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:37:48,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:37:48,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:37:48,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:37:48,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:37:48,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:37:48,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:37:48,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:37:48,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:37:48,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:37:48,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:37:48,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:37:48,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:37:48,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:37:48,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:37:48,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:37:48,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:37:48,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:37:48,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:37:48,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:37:48,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:37:48,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:37:48,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:37:48,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:37:48,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:37:48,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:37:48,289 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:37:48,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:37:48,290 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:37:48,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:37:48,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:37:48,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:37:48,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:37:48,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:37:48,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:37:48,292 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:37:48,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:37:48,292 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:37:48,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:37:48,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:37:48,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:37:48,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:37:48,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:37:48,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:37:48,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:37:48,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:37:48,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:37:48,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:37:48,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:37:48,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:37:48,295 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:37:48,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:37:48,295 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:37:48,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:37:48,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:37:48,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:37:48,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:37:48,630 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:37:48,630 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:37:48,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-30 16:37:49,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:37:50,119 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:37:50,122 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-30 16:37:50,145 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a1e50ecd/def2abadb1f644b8af0cea6ab811b647/FLAG44852dfab [2023-08-30 16:37:50,172 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a1e50ecd/def2abadb1f644b8af0cea6ab811b647 [2023-08-30 16:37:50,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:37:50,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:37:50,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:37:50,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:37:50,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:37:50,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2294ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50, skipping insertion in model container [2023-08-30 16:37:50,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:37:50,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:37:50,370 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:37:50,506 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/46_monabsex2_vs.i[30494,30507] [2023-08-30 16:37:50,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:37:50,528 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:37:50,550 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:37:50,573 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/46_monabsex2_vs.i[30494,30507] [2023-08-30 16:37:50,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:37:50,628 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:37:50,628 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:37:50,628 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:37:50,652 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:37:50,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50 WrapperNode [2023-08-30 16:37:50,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:37:50,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:37:50,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:37:50,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:37:50,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,709 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-08-30 16:37:50,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:37:50,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:37:50,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:37:50,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:37:50,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,743 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:37:50,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:37:50,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:37:50,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:37:50,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (1/1) ... [2023-08-30 16:37:50,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:37:50,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:37:50,790 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 16:37:50,813 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 16:37:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:37:50,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:37:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:37:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 16:37:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:37:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:37:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:37:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:37:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 16:37:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:37:50,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:37:50,831 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 16:37:51,009 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:37:51,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:37:51,139 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:37:51,155 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:37:51,158 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 16:37:51,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:37:51 BoogieIcfgContainer [2023-08-30 16:37:51,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:37:51,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:37:51,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:37:51,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:37:51,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:37:50" (1/3) ... [2023-08-30 16:37:51,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6185d776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:37:51, skipping insertion in model container [2023-08-30 16:37:51,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:50" (2/3) ... [2023-08-30 16:37:51,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6185d776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:37:51, skipping insertion in model container [2023-08-30 16:37:51,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:37:51" (3/3) ... [2023-08-30 16:37:51,168 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-08-30 16:37:51,175 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:37:51,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:37:51,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:37:51,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:37:51,241 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:51,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:51,326 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2023-08-30 16:37:51,327 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:51,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 43 events. 2/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-08-30 16:37:51,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:51,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:51,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:51,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:51,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:51,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:51,385 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2023-08-30 16:37:51,385 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:51,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 43 events. 2/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-08-30 16:37:51,387 INFO L119 LiptonReduction]: Number of co-enabled transitions 182 [2023-08-30 16:37:52,367 INFO L134 LiptonReduction]: Checked pairs total: 151 [2023-08-30 16:37:52,367 INFO L136 LiptonReduction]: Total number of compositions: 27 [2023-08-30 16:37:52,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:52,406 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:52,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:37:52,410 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2023-08-30 16:37:52,410 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:52,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:52,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:37:52,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:52,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash 4673506, now seen corresponding path program 1 times [2023-08-30 16:37:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:52,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950788369] [2023-08-30 16:37:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:52,707 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 16:37:52,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:52,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950788369] [2023-08-30 16:37:52,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950788369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:52,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:37:52,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928504720] [2023-08-30 16:37:52,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:52,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:52,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2023-08-30 16:37:52,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 16:37:52,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:52,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2023-08-30 16:37:52,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:52,770 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 16:37:52,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:52,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2023-08-30 16:37:52,772 INFO L137 encePairwiseOnDemand]: 56/60 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-08-30 16:37:52,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2023-08-30 16:37:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-08-30 16:37:52,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-08-30 16:37:52,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-08-30 16:37:52,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-08-30 16:37:52,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:52,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-08-30 16:37:52,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 16:37:52,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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 16:37:52,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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 16:37:52,804 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 3 states and 88 transitions. [2023-08-30 16:37:52,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2023-08-30 16:37:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:37:52,810 INFO L231 Difference]: Finished difference. Result has 11 places, 0 transitions, 0 flow [2023-08-30 16:37:52,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=11, PETRI_TRANSITIONS=0} [2023-08-30 16:37:52,817 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, 0 predicate places. [2023-08-30 16:37:52,818 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 0 transitions, 0 flow [2023-08-30 16:37:52,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 16:37:52,822 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:37:52,823 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:37:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:37:52,826 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:52,838 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:37:52,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:52,850 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2023-08-30 16:37:52,854 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:52,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 43 events. 2/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-08-30 16:37:52,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 71 flow [2023-08-30 16:37:52,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 59 flow [2023-08-30 16:37:52,859 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:52,859 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 27 transitions, 59 flow [2023-08-30 16:37:52,863 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 27 transitions, 59 flow [2023-08-30 16:37:52,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 59 flow [2023-08-30 16:37:52,871 INFO L130 PetriNetUnfolder]: 0/31 cut-off events. [2023-08-30 16:37:52,871 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:52,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-30 16:37:52,873 INFO L119 LiptonReduction]: Number of co-enabled transitions 98 [2023-08-30 16:37:53,806 INFO L134 LiptonReduction]: Checked pairs total: 83 [2023-08-30 16:37:53,806 INFO L136 LiptonReduction]: Total number of compositions: 25 [2023-08-30 16:37:53,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:37:53,809 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:53,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:37:53,810 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:37:53,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:53,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:53,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:37:53,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:37:53,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash 5398713, now seen corresponding path program 1 times [2023-08-30 16:37:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:53,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876800028] [2023-08-30 16:37:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:53,826 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:37:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:53,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:37:53,848 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:37:53,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:37:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:37:53,848 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:53,849 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:37:53,850 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:37:53,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:37:53,874 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:53,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:53,894 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2023-08-30 16:37:53,895 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:53,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 63 events. 3/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 44. Up to 6 conditions per place. [2023-08-30 16:37:53,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:53,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:53,896 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:53,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:53,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:53,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:53,903 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2023-08-30 16:37:53,903 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:53,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 63 events. 3/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 44. Up to 6 conditions per place. [2023-08-30 16:37:53,904 INFO L119 LiptonReduction]: Number of co-enabled transitions 476 [2023-08-30 16:37:54,623 INFO L134 LiptonReduction]: Checked pairs total: 883 [2023-08-30 16:37:54,623 INFO L136 LiptonReduction]: Total number of compositions: 28 [2023-08-30 16:37:54,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:54,626 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:54,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:37:54,628 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:37:54,628 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:54,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:54,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:37:54,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:54,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:54,629 INFO L85 PathProgramCache]: Analyzing trace with hash 7814381, now seen corresponding path program 1 times [2023-08-30 16:37:54,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:54,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071392824] [2023-08-30 16:37:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:54,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:54,699 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 16:37:54,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071392824] [2023-08-30 16:37:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071392824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:54,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:54,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:37:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999625041] [2023-08-30 16:37:54,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:54,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:54,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:54,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 69 [2023-08-30 16:37:54,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 16:37:54,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:54,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 69 [2023-08-30 16:37:54,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:54,737 INFO L130 PetriNetUnfolder]: 22/66 cut-off events. [2023-08-30 16:37:54,737 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 16:37:54,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 66 events. 22/66 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 217 event pairs, 7 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 51. Up to 32 conditions per place. [2023-08-30 16:37:54,738 INFO L137 encePairwiseOnDemand]: 63/69 looper letters, 9 selfloop transitions, 3 changer transitions 4/21 dead transitions. [2023-08-30 16:37:54,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 21 transitions, 91 flow [2023-08-30 16:37:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2023-08-30 16:37:54,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314009661835749 [2023-08-30 16:37:54,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2023-08-30 16:37:54,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2023-08-30 16:37:54,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:54,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2023-08-30 16:37:54,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 16:37:54,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 16:37:54,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 16:37:54,742 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 110 transitions. [2023-08-30 16:37:54,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 21 transitions, 91 flow [2023-08-30 16:37:54,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 89 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:37:54,755 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 53 flow [2023-08-30 16:37:54,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-30 16:37:54,756 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2023-08-30 16:37:54,756 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 53 flow [2023-08-30 16:37:54,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 16:37:54,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:54,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:54,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:37:54,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:54,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:54,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1010938925, now seen corresponding path program 1 times [2023-08-30 16:37:54,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:54,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107219619] [2023-08-30 16:37:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:54,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:37:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107219619] [2023-08-30 16:37:54,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107219619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:54,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:54,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:54,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544891282] [2023-08-30 16:37:54,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:54,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:54,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:54,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 69 [2023-08-30 16:37:54,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 16:37:54,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:54,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 69 [2023-08-30 16:37:54,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:54,833 INFO L130 PetriNetUnfolder]: 36/84 cut-off events. [2023-08-30 16:37:54,833 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 16:37:54,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 84 events. 36/84 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 297 event pairs, 9 based on Foata normal form. 4/85 useless extension candidates. Maximal degree in co-relation 111. Up to 55 conditions per place. [2023-08-30 16:37:54,834 INFO L137 encePairwiseOnDemand]: 65/69 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-30 16:37:54,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 94 flow [2023-08-30 16:37:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-08-30 16:37:54,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-08-30 16:37:54,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-08-30 16:37:54,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-08-30 16:37:54,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:54,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-08-30 16:37:54,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 16:37:54,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 16:37:54,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 16:37:54,838 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 53 flow. Second operand 3 states and 108 transitions. [2023-08-30 16:37:54,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 94 flow [2023-08-30 16:37:54,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:54,839 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-30 16:37:54,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-30 16:37:54,840 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2023-08-30 16:37:54,841 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-30 16:37:54,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 16:37:54,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:37:54,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 16:37:54,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 16:37:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:37:54,842 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 16:37:54,842 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 16:37:54,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:54,849 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2023-08-30 16:37:54,849 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:54,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 63 events. 3/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 44. Up to 6 conditions per place. [2023-08-30 16:37:54,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 41 transitions, 94 flow [2023-08-30 16:37:54,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 35 transitions, 82 flow [2023-08-30 16:37:54,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:54,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 35 transitions, 82 flow [2023-08-30 16:37:54,851 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 35 transitions, 82 flow [2023-08-30 16:37:54,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 35 transitions, 82 flow [2023-08-30 16:37:54,855 INFO L130 PetriNetUnfolder]: 0/45 cut-off events. [2023-08-30 16:37:54,855 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:54,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 0/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-30 16:37:54,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 308 [2023-08-30 16:37:55,712 INFO L134 LiptonReduction]: Checked pairs total: 673 [2023-08-30 16:37:55,712 INFO L136 LiptonReduction]: Total number of compositions: 26 [2023-08-30 16:37:55,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:37:55,715 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:55,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:37:55,717 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-08-30 16:37:55,717 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:55,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:55,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 16:37:55,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:37:55,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1920489848, now seen corresponding path program 1 times [2023-08-30 16:37:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141266726] [2023-08-30 16:37:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:55,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:55,734 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:37:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:55,747 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:37:55,747 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:37:55,748 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:37:55,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:37:55,748 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:55,749 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:37:55,749 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:37:55,749 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 16:37:55,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:55,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:55,771 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-30 16:37:55,771 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:55,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 83 events. 4/83 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 67. Up to 8 conditions per place. [2023-08-30 16:37:55,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:55,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:55,773 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:55,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:55,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:55,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:55,779 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-30 16:37:55,779 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:55,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 83 events. 4/83 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 67. Up to 8 conditions per place. [2023-08-30 16:37:55,780 INFO L119 LiptonReduction]: Number of co-enabled transitions 882 [2023-08-30 16:37:56,527 INFO L134 LiptonReduction]: Checked pairs total: 1736 [2023-08-30 16:37:56,527 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-30 16:37:56,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:56,529 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:56,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:37:56,531 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:37:56,531 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:56,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:56,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:37:56,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:56,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:56,532 INFO L85 PathProgramCache]: Analyzing trace with hash 11352464, now seen corresponding path program 1 times [2023-08-30 16:37:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:56,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164809031] [2023-08-30 16:37:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:56,605 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 16:37:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:56,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164809031] [2023-08-30 16:37:56,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164809031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:56,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:56,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:37:56,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098288696] [2023-08-30 16:37:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:56,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:56,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 81 [2023-08-30 16:37:56,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:37:56,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:56,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 81 [2023-08-30 16:37:56,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:56,658 INFO L130 PetriNetUnfolder]: 162/314 cut-off events. [2023-08-30 16:37:56,658 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 16:37:56,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 314 events. 162/314 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1399 event pairs, 41 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 139. Up to 226 conditions per place. [2023-08-30 16:37:56,661 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 19 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-08-30 16:37:56,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 137 flow [2023-08-30 16:37:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-08-30 16:37:56,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2023-08-30 16:37:56,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-08-30 16:37:56,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-08-30 16:37:56,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:56,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-08-30 16:37:56,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 16:37:56,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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 16:37:56,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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 16:37:56,665 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 63 flow. Second operand 3 states and 130 transitions. [2023-08-30 16:37:56,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 137 flow [2023-08-30 16:37:56,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 129 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 16:37:56,667 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 85 flow [2023-08-30 16:37:56,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-30 16:37:56,667 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-30 16:37:56,668 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 85 flow [2023-08-30 16:37:56,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:37:56,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:56,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:37:56,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:56,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2075280661, now seen corresponding path program 1 times [2023-08-30 16:37:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716843268] [2023-08-30 16:37:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:37:56,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716843268] [2023-08-30 16:37:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716843268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:56,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:56,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:56,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332956664] [2023-08-30 16:37:56,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:56,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:56,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:56,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 81 [2023-08-30 16:37:56,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 16:37:56,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:56,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 81 [2023-08-30 16:37:56,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:56,775 INFO L130 PetriNetUnfolder]: 279/467 cut-off events. [2023-08-30 16:37:56,776 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 16:37:56,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 467 events. 279/467 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2047 event pairs, 57 based on Foata normal form. 46/505 useless extension candidates. Maximal degree in co-relation 820. Up to 392 conditions per place. [2023-08-30 16:37:56,778 INFO L137 encePairwiseOnDemand]: 75/81 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-30 16:37:56,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 153 flow [2023-08-30 16:37:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-08-30 16:37:56,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267489711934157 [2023-08-30 16:37:56,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-08-30 16:37:56,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-08-30 16:37:56,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:56,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-08-30 16:37:56,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 16:37:56,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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 16:37:56,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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 16:37:56,783 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 85 flow. Second operand 3 states and 128 transitions. [2023-08-30 16:37:56,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 153 flow [2023-08-30 16:37:56,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:56,784 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-30 16:37:56,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-30 16:37:56,785 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-08-30 16:37:56,785 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-30 16:37:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 16:37:56,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 16:37:56,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 16:37:56,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 16:37:56,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 16:37:56,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:37:56,787 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 16:37:56,787 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:37:56,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:56,794 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-30 16:37:56,794 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:56,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 83 events. 4/83 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 67. Up to 8 conditions per place. [2023-08-30 16:37:56,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 49 transitions, 119 flow [2023-08-30 16:37:56,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 107 flow [2023-08-30 16:37:56,795 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:56,795 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 43 transitions, 107 flow [2023-08-30 16:37:56,796 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 43 transitions, 107 flow [2023-08-30 16:37:56,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 43 transitions, 107 flow [2023-08-30 16:37:56,800 INFO L130 PetriNetUnfolder]: 0/59 cut-off events. [2023-08-30 16:37:56,800 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:56,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 59 events. 0/59 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-08-30 16:37:56,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 630 [2023-08-30 16:37:57,730 INFO L134 LiptonReduction]: Checked pairs total: 1700 [2023-08-30 16:37:57,730 INFO L136 LiptonReduction]: Total number of compositions: 30 [2023-08-30 16:37:57,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:37:57,732 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:57,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:37:57,735 INFO L130 PetriNetUnfolder]: 0/21 cut-off events. [2023-08-30 16:37:57,735 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:57,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:57,735 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-30 16:37:57,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:37:57,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 627347833, now seen corresponding path program 1 times [2023-08-30 16:37:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606738375] [2023-08-30 16:37:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:57,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:37:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:57,784 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:37:57,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:37:57,785 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:37:57,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:37:57,788 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:57,789 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:37:57,792 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:37:57,792 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 16:37:57,803 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:57,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:57,815 INFO L130 PetriNetUnfolder]: 5/103 cut-off events. [2023-08-30 16:37:57,815 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:57,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 103 events. 5/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 91. Up to 10 conditions per place. [2023-08-30 16:37:57,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:57,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:57,816 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:57,817 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:57,817 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:57,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:57,833 INFO L130 PetriNetUnfolder]: 5/103 cut-off events. [2023-08-30 16:37:57,833 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:57,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 103 events. 5/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 91. Up to 10 conditions per place. [2023-08-30 16:37:57,835 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2023-08-30 16:37:58,654 INFO L134 LiptonReduction]: Checked pairs total: 3359 [2023-08-30 16:37:58,654 INFO L136 LiptonReduction]: Total number of compositions: 36 [2023-08-30 16:37:58,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:58,656 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:58,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 16:37:58,658 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:37:58,658 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:58,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:58,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:37:58,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:37:58,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash 15383087, now seen corresponding path program 1 times [2023-08-30 16:37:58,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:58,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291253433] [2023-08-30 16:37:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:58,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:58,687 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 16:37:58,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291253433] [2023-08-30 16:37:58,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291253433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:58,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:58,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:37:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689531920] [2023-08-30 16:37:58,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:58,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:58,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2023-08-30 16:37:58,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 16:37:58,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:58,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2023-08-30 16:37:58,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:58,851 INFO L130 PetriNetUnfolder]: 1032/1602 cut-off events. [2023-08-30 16:37:58,852 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2023-08-30 16:37:58,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1602 events. 1032/1602 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8284 event pairs, 269 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 682. Up to 1390 conditions per place. [2023-08-30 16:37:58,861 INFO L137 encePairwiseOnDemand]: 83/93 looper letters, 25 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-08-30 16:37:58,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 187 flow [2023-08-30 16:37:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-08-30 16:37:58,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2023-08-30 16:37:58,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-08-30 16:37:58,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-08-30 16:37:58,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:58,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-08-30 16:37:58,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 16:37:58,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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 16:37:58,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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 16:37:58,865 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 84 flow. Second operand 3 states and 150 transitions. [2023-08-30 16:37:58,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 187 flow [2023-08-30 16:37:58,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 16:37:58,867 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 109 flow [2023-08-30 16:37:58,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-30 16:37:58,868 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-30 16:37:58,868 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 109 flow [2023-08-30 16:37:58,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 16:37:58,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:58,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:37:58,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:37:58,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1943179813, now seen corresponding path program 1 times [2023-08-30 16:37:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689019032] [2023-08-30 16:37:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:37:58,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:58,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689019032] [2023-08-30 16:37:58,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689019032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:58,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625139072] [2023-08-30 16:37:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:58,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 93 [2023-08-30 16:37:58,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 16:37:58,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:58,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 93 [2023-08-30 16:37:58,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:59,095 INFO L130 PetriNetUnfolder]: 1623/2343 cut-off events. [2023-08-30 16:37:59,096 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-08-30 16:37:59,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2343 events. 1623/2343 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11353 event pairs, 347 based on Foata normal form. 342/2664 useless extension candidates. Maximal degree in co-relation 4274. Up to 2160 conditions per place. [2023-08-30 16:37:59,103 INFO L137 encePairwiseOnDemand]: 85/93 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-30 16:37:59,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 200 flow [2023-08-30 16:37:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-08-30 16:37:59,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304659498207885 [2023-08-30 16:37:59,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-08-30 16:37:59,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-08-30 16:37:59,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:59,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-08-30 16:37:59,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 16:37:59,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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 16:37:59,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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 16:37:59,108 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 109 flow. Second operand 3 states and 148 transitions. [2023-08-30 16:37:59,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 200 flow [2023-08-30 16:37:59,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:59,110 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-30 16:37:59,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-30 16:37:59,111 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2023-08-30 16:37:59,111 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-30 16:37:59,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 16:37:59,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 16:37:59,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 16:37:59,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 16:37:59,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 16:37:59,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 16:37:59,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:37:59,113 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 16:37:59,113 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:37:59,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:59,123 INFO L130 PetriNetUnfolder]: 5/103 cut-off events. [2023-08-30 16:37:59,123 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:59,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 103 events. 5/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 91. Up to 10 conditions per place. [2023-08-30 16:37:59,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 57 transitions, 146 flow [2023-08-30 16:37:59,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 51 transitions, 134 flow [2023-08-30 16:37:59,125 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:59,125 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 51 transitions, 134 flow [2023-08-30 16:37:59,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 51 transitions, 134 flow [2023-08-30 16:37:59,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 51 transitions, 134 flow [2023-08-30 16:37:59,133 INFO L130 PetriNetUnfolder]: 0/73 cut-off events. [2023-08-30 16:37:59,134 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:59,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 73 events. 0/73 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 58 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-30 16:37:59,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 1064 [2023-08-30 16:38:00,064 INFO L134 LiptonReduction]: Checked pairs total: 2709 [2023-08-30 16:38:00,064 INFO L136 LiptonReduction]: Total number of compositions: 34 [2023-08-30 16:38:00,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:38:00,066 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:00,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:38:00,074 INFO L130 PetriNetUnfolder]: 0/28 cut-off events. [2023-08-30 16:38:00,074 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:38:00,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:00,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:00,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:38:00,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -640752779, now seen corresponding path program 1 times [2023-08-30 16:38:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:00,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322019652] [2023-08-30 16:38:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:00,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:38:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:00,096 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:38:00,096 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:38:00,096 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:38:00,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:38:00,097 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:38:00,097 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:38:00,098 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:38:00,098 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 16:38:00,114 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:38:00,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:00,125 INFO L130 PetriNetUnfolder]: 6/123 cut-off events. [2023-08-30 16:38:00,125 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:00,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 123 events. 6/123 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 116. Up to 12 conditions per place. [2023-08-30 16:38:00,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:00,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:00,126 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:00,127 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:00,127 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:00,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:00,134 INFO L130 PetriNetUnfolder]: 6/123 cut-off events. [2023-08-30 16:38:00,135 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:00,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 123 events. 6/123 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 116. Up to 12 conditions per place. [2023-08-30 16:38:00,137 INFO L119 LiptonReduction]: Number of co-enabled transitions 2030 [2023-08-30 16:38:01,037 INFO L134 LiptonReduction]: Checked pairs total: 4580 [2023-08-30 16:38:01,038 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-08-30 16:38:01,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:01,040 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:01,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 16:38:01,041 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:38:01,041 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:01,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:01,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:38:01,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:01,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 19907209, now seen corresponding path program 1 times [2023-08-30 16:38:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:01,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251985762] [2023-08-30 16:38:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:01,062 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 16:38:01,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:01,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251985762] [2023-08-30 16:38:01,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251985762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:01,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:01,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:38:01,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083418109] [2023-08-30 16:38:01,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:01,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:01,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:01,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 105 [2023-08-30 16:38:01,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 16:38:01,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:01,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 105 [2023-08-30 16:38:01,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:01,767 INFO L130 PetriNetUnfolder]: 5980/8248 cut-off events. [2023-08-30 16:38:01,768 INFO L131 PetriNetUnfolder]: For 3486/3486 co-relation queries the response was YES. [2023-08-30 16:38:01,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17869 conditions, 8248 events. 5980/8248 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 45194 event pairs, 1759 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 3516. Up to 7756 conditions per place. [2023-08-30 16:38:01,835 INFO L137 encePairwiseOnDemand]: 93/105 looper letters, 31 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-08-30 16:38:01,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 241 flow [2023-08-30 16:38:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-08-30 16:38:01,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-08-30 16:38:01,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-08-30 16:38:01,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-08-30 16:38:01,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:01,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-08-30 16:38:01,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 16:38:01,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 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 16:38:01,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 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 16:38:01,840 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 107 flow. Second operand 3 states and 170 transitions. [2023-08-30 16:38:01,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 241 flow [2023-08-30 16:38:01,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 209 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:01,843 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 133 flow [2023-08-30 16:38:01,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-30 16:38:01,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-30 16:38:01,846 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 133 flow [2023-08-30 16:38:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 16:38:01,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:01,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:38:01,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:01,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1231343438, now seen corresponding path program 1 times [2023-08-30 16:38:01,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:01,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033903026] [2023-08-30 16:38:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:01,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:01,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033903026] [2023-08-30 16:38:01,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033903026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:01,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:01,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:01,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255679897] [2023-08-30 16:38:01,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:01,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:01,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:01,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:01,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 105 [2023-08-30 16:38:01,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 16:38:01,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:01,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 105 [2023-08-30 16:38:01,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:02,761 INFO L130 PetriNetUnfolder]: 8535/11343 cut-off events. [2023-08-30 16:38:02,762 INFO L131 PetriNetUnfolder]: For 2560/2560 co-relation queries the response was YES. [2023-08-30 16:38:02,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27936 conditions, 11343 events. 8535/11343 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57498 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 20700. Up to 10912 conditions per place. [2023-08-30 16:38:02,799 INFO L137 encePairwiseOnDemand]: 95/105 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-30 16:38:02,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 247 flow [2023-08-30 16:38:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-08-30 16:38:02,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-08-30 16:38:02,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-08-30 16:38:02,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-08-30 16:38:02,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:02,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-08-30 16:38:02,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 16:38:02,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 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 16:38:02,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 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 16:38:02,803 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 133 flow. Second operand 3 states and 168 transitions. [2023-08-30 16:38:02,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 247 flow [2023-08-30 16:38:02,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:02,807 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-30 16:38:02,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-30 16:38:02,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-30 16:38:02,808 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-30 16:38:02,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 16:38:02,808 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-30 16:38:02,808 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 16:38:02,809 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 16:38:02,809 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 16:38:02,809 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 16:38:02,809 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 16:38:02,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:38:02,810 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 16:38:02,810 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:38:02,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:02,826 INFO L130 PetriNetUnfolder]: 6/123 cut-off events. [2023-08-30 16:38:02,826 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:02,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 123 events. 6/123 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 116. Up to 12 conditions per place. [2023-08-30 16:38:02,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 65 transitions, 175 flow [2023-08-30 16:38:02,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 59 transitions, 163 flow [2023-08-30 16:38:02,828 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:02,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 59 transitions, 163 flow [2023-08-30 16:38:02,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 59 transitions, 163 flow [2023-08-30 16:38:02,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 59 transitions, 163 flow [2023-08-30 16:38:02,835 INFO L130 PetriNetUnfolder]: 0/87 cut-off events. [2023-08-30 16:38:02,836 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:02,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 87 events. 0/87 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-08-30 16:38:02,837 INFO L119 LiptonReduction]: Number of co-enabled transitions 1610 [2023-08-30 16:38:03,883 INFO L134 LiptonReduction]: Checked pairs total: 4316 [2023-08-30 16:38:03,883 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-30 16:38:03,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:38:03,884 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:03,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:38:03,888 INFO L130 PetriNetUnfolder]: 0/35 cut-off events. [2023-08-30 16:38:03,888 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:03,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:03,888 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:03,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:38:03,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:03,889 INFO L85 PathProgramCache]: Analyzing trace with hash 191944533, now seen corresponding path program 1 times [2023-08-30 16:38:03,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:03,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38079253] [2023-08-30 16:38:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:03,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:03,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:38:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:03,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:38:03,924 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:38:03,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:38:03,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:38:03,925 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:38:03,927 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:38:03,927 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:38:03,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 16:38:03,948 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:38:03,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:03,958 INFO L130 PetriNetUnfolder]: 7/143 cut-off events. [2023-08-30 16:38:03,958 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:38:03,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 143 events. 7/143 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 14 conditions per place. [2023-08-30 16:38:03,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:03,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:03,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:03,961 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:03,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:03,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:03,970 INFO L130 PetriNetUnfolder]: 7/143 cut-off events. [2023-08-30 16:38:03,971 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:38:03,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 143 events. 7/143 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 14 conditions per place. [2023-08-30 16:38:03,973 INFO L119 LiptonReduction]: Number of co-enabled transitions 2772 [2023-08-30 16:38:04,920 INFO L134 LiptonReduction]: Checked pairs total: 6700 [2023-08-30 16:38:04,921 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-30 16:38:04,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:04,922 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:04,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 16:38:04,923 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:38:04,924 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:04,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:04,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:38:04,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:04,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash 24927719, now seen corresponding path program 1 times [2023-08-30 16:38:04,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:04,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072205880] [2023-08-30 16:38:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:04,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:04,959 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 16:38:04,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:04,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072205880] [2023-08-30 16:38:04,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072205880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:04,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:04,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:38:04,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894487643] [2023-08-30 16:38:04,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:04,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:04,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:04,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:04,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:04,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 117 [2023-08-30 16:38:04,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 16:38:04,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:04,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 117 [2023-08-30 16:38:04,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:08,091 INFO L130 PetriNetUnfolder]: 32246/41520 cut-off events. [2023-08-30 16:38:08,092 INFO L131 PetriNetUnfolder]: For 20783/20783 co-relation queries the response was YES. [2023-08-30 16:38:08,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90073 conditions, 41520 events. 32246/41520 cut-off events. For 20783/20783 co-relation queries the response was YES. Maximal size of possible extension queue 2609. Compared 232335 event pairs, 10687 based on Foata normal form. 0/29993 useless extension candidates. Maximal degree in co-relation 18129. Up to 40404 conditions per place. [2023-08-30 16:38:08,425 INFO L137 encePairwiseOnDemand]: 103/117 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-08-30 16:38:08,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 299 flow [2023-08-30 16:38:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-08-30 16:38:08,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413105413105413 [2023-08-30 16:38:08,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-08-30 16:38:08,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-08-30 16:38:08,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:08,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-08-30 16:38:08,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 16:38:08,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 16:38:08,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 16:38:08,429 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 132 flow. Second operand 3 states and 190 transitions. [2023-08-30 16:38:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 299 flow [2023-08-30 16:38:08,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 249 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:08,449 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 157 flow [2023-08-30 16:38:08,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-30 16:38:08,450 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-30 16:38:08,451 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 157 flow [2023-08-30 16:38:08,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 16:38:08,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:08,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:08,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:38:08,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:08,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1635554895, now seen corresponding path program 1 times [2023-08-30 16:38:08,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:08,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166244869] [2023-08-30 16:38:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:08,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:08,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166244869] [2023-08-30 16:38:08,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166244869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:08,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:08,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:08,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806766831] [2023-08-30 16:38:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:08,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:08,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:08,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:08,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 117 [2023-08-30 16:38:08,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 16:38:08,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:08,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 117 [2023-08-30 16:38:08,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:11,546 INFO L130 PetriNetUnfolder]: 42327/53407 cut-off events. [2023-08-30 16:38:11,546 INFO L131 PetriNetUnfolder]: For 13148/13148 co-relation queries the response was YES. [2023-08-30 16:38:11,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130277 conditions, 53407 events. 42327/53407 cut-off events. For 13148/13148 co-relation queries the response was YES. Maximal size of possible extension queue 2248. Compared 279678 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 96838. Up to 52416 conditions per place. [2023-08-30 16:38:11,702 INFO L137 encePairwiseOnDemand]: 105/117 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-30 16:38:11,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 294 flow [2023-08-30 16:38:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-30 16:38:11,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356125356125356 [2023-08-30 16:38:11,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-30 16:38:11,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-30 16:38:11,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:11,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-30 16:38:11,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 16:38:11,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 16:38:11,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 16:38:11,706 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 157 flow. Second operand 3 states and 188 transitions. [2023-08-30 16:38:11,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 294 flow [2023-08-30 16:38:11,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:11,713 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-30 16:38:11,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-30 16:38:11,714 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-08-30 16:38:11,714 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-30 16:38:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 16:38:11,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-30 16:38:11,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 16:38:11,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 16:38:11,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 16:38:11,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 16:38:11,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 16:38:11,716 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 16:38:11,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:38:11,716 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 16:38:11,716 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:38:11,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:11,908 INFO L130 PetriNetUnfolder]: 7/143 cut-off events. [2023-08-30 16:38:11,908 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:38:11,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 143 events. 7/143 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 14 conditions per place. [2023-08-30 16:38:11,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 73 transitions, 206 flow [2023-08-30 16:38:11,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 67 transitions, 194 flow [2023-08-30 16:38:11,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:11,909 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 67 transitions, 194 flow [2023-08-30 16:38:11,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 67 transitions, 194 flow [2023-08-30 16:38:11,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 67 transitions, 194 flow [2023-08-30 16:38:11,919 INFO L130 PetriNetUnfolder]: 0/101 cut-off events. [2023-08-30 16:38:11,919 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:38:11,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 101 events. 0/101 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-08-30 16:38:11,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-08-30 16:38:12,951 INFO L134 LiptonReduction]: Checked pairs total: 6250 [2023-08-30 16:38:12,951 INFO L136 LiptonReduction]: Total number of compositions: 42 [2023-08-30 16:38:12,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:38:12,952 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:12,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:38:12,956 INFO L130 PetriNetUnfolder]: 0/42 cut-off events. [2023-08-30 16:38:12,956 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:38:12,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:12,956 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:12,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:38:12,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:12,956 INFO L85 PathProgramCache]: Analyzing trace with hash 434263394, now seen corresponding path program 1 times [2023-08-30 16:38:12,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:12,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022306027] [2023-08-30 16:38:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:12,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:12,968 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:38:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:12,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:38:12,978 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:38:12,978 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:38:12,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:38:12,978 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:38:12,979 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:38:12,979 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:38:12,979 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 16:38:12,992 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:38:12,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:13,004 INFO L130 PetriNetUnfolder]: 8/163 cut-off events. [2023-08-30 16:38:13,004 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:38:13,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 163 events. 8/163 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 249 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 173. Up to 16 conditions per place. [2023-08-30 16:38:13,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:13,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:13,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:13,006 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:13,006 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:13,016 INFO L130 PetriNetUnfolder]: 8/163 cut-off events. [2023-08-30 16:38:13,016 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:38:13,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 163 events. 8/163 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 249 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 173. Up to 16 conditions per place. [2023-08-30 16:38:13,020 INFO L119 LiptonReduction]: Number of co-enabled transitions 3626 [2023-08-30 16:38:13,993 INFO L134 LiptonReduction]: Checked pairs total: 8703 [2023-08-30 16:38:13,993 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-08-30 16:38:13,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:13,994 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:13,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 16:38:13,995 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:38:13,995 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:13,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:13,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:38:13,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:38:13,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 30435979, now seen corresponding path program 1 times [2023-08-30 16:38:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:13,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125299388] [2023-08-30 16:38:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:13,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:14,023 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 16:38:14,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:14,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125299388] [2023-08-30 16:38:14,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125299388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:14,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:38:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057742899] [2023-08-30 16:38:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:14,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:14,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 129 [2023-08-30 16:38:14,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 16:38:14,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:14,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 129 [2023-08-30 16:38:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:27,451 INFO L130 PetriNetUnfolder]: 164558/202770 cut-off events. [2023-08-30 16:38:27,451 INFO L131 PetriNetUnfolder]: For 117491/117491 co-relation queries the response was YES. [2023-08-30 16:38:27,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439990 conditions, 202770 events. 164558/202770 cut-off events. For 117491/117491 co-relation queries the response was YES. Maximal size of possible extension queue 10263. Compared 1153395 event pairs, 60109 based on Foata normal form. 0/144041 useless extension candidates. Maximal degree in co-relation 91161. Up to 200278 conditions per place. [2023-08-30 16:38:28,995 INFO L137 encePairwiseOnDemand]: 113/129 looper letters, 43 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2023-08-30 16:38:28,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 361 flow [2023-08-30 16:38:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-08-30 16:38:28,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2023-08-30 16:38:28,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-08-30 16:38:28,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-08-30 16:38:28,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:28,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-08-30 16:38:28,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 16:38:28,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 16:38:28,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 16:38:28,999 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 159 flow. Second operand 3 states and 210 transitions. [2023-08-30 16:38:28,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 361 flow [2023-08-30 16:38:29,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 289 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:29,036 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 181 flow [2023-08-30 16:38:29,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-30 16:38:29,036 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-30 16:38:29,036 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 181 flow [2023-08-30 16:38:29,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 16:38:29,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:29,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:29,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:38:29,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:38:29,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:29,038 INFO L85 PathProgramCache]: Analyzing trace with hash -435721061, now seen corresponding path program 1 times [2023-08-30 16:38:29,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:29,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411207633] [2023-08-30 16:38:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:29,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:29,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411207633] [2023-08-30 16:38:29,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411207633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:29,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:29,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:29,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180000534] [2023-08-30 16:38:29,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:29,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:29,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:29,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:29,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 129 [2023-08-30 16:38:29,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 16:38:29,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:29,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 129 [2023-08-30 16:38:29,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:43,381 INFO L130 PetriNetUnfolder]: 202071/246079 cut-off events. [2023-08-30 16:38:43,382 INFO L131 PetriNetUnfolder]: For 64830/64830 co-relation queries the response was YES. [2023-08-30 16:38:44,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595332 conditions, 246079 events. 202071/246079 cut-off events. For 64830/64830 co-relation queries the response was YES. Maximal size of possible extension queue 8505. Compared 1323879 event pairs, 60901 based on Foata normal form. 58602/304353 useless extension candidates. Maximal degree in co-relation 443168. Up to 243840 conditions per place. [2023-08-30 16:38:44,221 INFO L137 encePairwiseOnDemand]: 115/129 looper letters, 0 selfloop transitions, 0 changer transitions 61/61 dead transitions. [2023-08-30 16:38:44,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 341 flow [2023-08-30 16:38:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-30 16:38:44,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537467700258398 [2023-08-30 16:38:44,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-30 16:38:44,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-30 16:38:44,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:44,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-30 16:38:44,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 16:38:44,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 16:38:44,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 16:38:44,225 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 181 flow. Second operand 3 states and 208 transitions. [2023-08-30 16:38:44,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 341 flow [2023-08-30 16:38:44,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:44,283 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-30 16:38:44,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-30 16:38:44,284 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2023-08-30 16:38:44,284 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-30 16:38:44,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 16:38:44,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2023-08-30 16:38:44,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-30 16:38:44,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-30 16:38:44,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-30 16:38:44,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-30 16:38:44,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-30 16:38:44,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-30 16:38:44,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-30 16:38:44,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:38:44,286 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 16:38:44,286 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:38:44,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:44,297 INFO L130 PetriNetUnfolder]: 8/163 cut-off events. [2023-08-30 16:38:44,297 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:38:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 163 events. 8/163 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 249 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 173. Up to 16 conditions per place. [2023-08-30 16:38:44,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 81 transitions, 239 flow [2023-08-30 16:38:44,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 75 transitions, 227 flow [2023-08-30 16:38:44,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:44,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 75 transitions, 227 flow [2023-08-30 16:38:44,299 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 75 transitions, 227 flow [2023-08-30 16:38:44,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 75 transitions, 227 flow [2023-08-30 16:38:44,306 INFO L130 PetriNetUnfolder]: 0/115 cut-off events. [2023-08-30 16:38:44,306 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:38:44,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 115 events. 0/115 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 105 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2023-08-30 16:38:44,309 INFO L119 LiptonReduction]: Number of co-enabled transitions 3038 [2023-08-30 16:38:45,413 INFO L134 LiptonReduction]: Checked pairs total: 9271 [2023-08-30 16:38:45,413 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-08-30 16:38:45,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:38:45,414 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:45,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:38:45,417 INFO L130 PetriNetUnfolder]: 0/49 cut-off events. [2023-08-30 16:38:45,417 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:38:45,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:45,418 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:45,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:38:45,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash 865329394, now seen corresponding path program 1 times [2023-08-30 16:38:45,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:45,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835513768] [2023-08-30 16:38:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:45,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:45,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:38:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:45,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:38:45,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:38:45,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:38:45,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:38:45,440 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:38:45,440 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:38:45,440 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:38:45,440 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-30 16:38:45,459 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:38:45,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 16:38:45,473 INFO L130 PetriNetUnfolder]: 9/183 cut-off events. [2023-08-30 16:38:45,474 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:38:45,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 183 events. 9/183 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 203. Up to 18 conditions per place. [2023-08-30 16:38:45,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 16:38:45,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 89 transitions, 274 flow [2023-08-30 16:38:45,476 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:45,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 89 transitions, 274 flow [2023-08-30 16:38:45,477 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 89 transitions, 274 flow [2023-08-30 16:38:45,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 16:38:45,488 INFO L130 PetriNetUnfolder]: 9/183 cut-off events. [2023-08-30 16:38:45,488 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:38:45,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 183 events. 9/183 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 203. Up to 18 conditions per place. [2023-08-30 16:38:45,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-30 16:38:46,776 INFO L134 LiptonReduction]: Checked pairs total: 11268 [2023-08-30 16:38:46,776 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-08-30 16:38:46,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:46,777 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:46,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 16:38:46,778 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:38:46,778 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:46,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:46,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:38:46,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 16:38:46,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash 36440639, now seen corresponding path program 1 times [2023-08-30 16:38:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:46,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074937499] [2023-08-30 16:38:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:46,802 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 16:38:46,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:46,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074937499] [2023-08-30 16:38:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074937499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:46,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:46,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:38:46,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023526153] [2023-08-30 16:38:46,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:46,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:46,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-08-30 16:38:46,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 16:38:46,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:46,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-08-30 16:38:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:04,855 INFO L130 PetriNetUnfolder]: 805204/962454 cut-off events. [2023-08-30 16:40:04,855 INFO L131 PetriNetUnfolder]: For 634919/634919 co-relation queries the response was YES. [2023-08-30 16:40:07,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088284 conditions, 962454 events. 805204/962454 cut-off events. For 634919/634919 co-relation queries the response was YES. Maximal size of possible extension queue 40190. Compared 5519430 event pairs, 317473 based on Foata normal form. 0/676445 useless extension candidates. Maximal degree in co-relation 444540. Up to 956954 conditions per place. [2023-08-30 16:40:11,975 INFO L137 encePairwiseOnDemand]: 123/141 looper letters, 49 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2023-08-30 16:40:11,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 427 flow [2023-08-30 16:40:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:40:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:40:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-08-30 16:40:11,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2023-08-30 16:40:11,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-08-30 16:40:11,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-08-30 16:40:11,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:11,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-08-30 16:40:11,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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 16:40:11,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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 16:40:11,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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 16:40:11,980 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 188 flow. Second operand 3 states and 230 transitions. [2023-08-30 16:40:11,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 427 flow [2023-08-30 16:40:12,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 329 flow, removed 49 selfloop flow, removed 0 redundant places. [2023-08-30 16:40:12,943 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 205 flow [2023-08-30 16:40:12,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-08-30 16:40:12,943 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-30 16:40:12,943 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 205 flow [2023-08-30 16:40:12,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 16:40:12,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:12,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:12,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:40:12,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 16:40:12,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -971703006, now seen corresponding path program 1 times [2023-08-30 16:40:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423986640] [2023-08-30 16:40:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:40:12,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423986640] [2023-08-30 16:40:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423986640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:40:12,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:40:12,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:40:12,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298302662] [2023-08-30 16:40:12,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:40:12,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:40:12,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:40:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:40:12,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-08-30 16:40:12,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 16:40:12,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:12,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-08-30 16:40:12,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:26,326 INFO L130 PetriNetUnfolder]: 939351/1114751 cut-off events. [2023-08-30 16:41:26,327 INFO L131 PetriNetUnfolder]: For 309390/309390 co-relation queries the response was YES. [2023-08-30 16:41:31,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678709 conditions, 1114751 events. 939351/1114751 cut-off events. For 309390/309390 co-relation queries the response was YES. Maximal size of possible extension queue 32749. Compared 6095195 event pairs, 310359 based on Foata normal form. 285754/1399728 useless extension candidates. Maximal degree in co-relation 1995954. Up to 1109760 conditions per place. [2023-08-30 16:41:32,524 INFO L137 encePairwiseOnDemand]: 125/141 looper letters, 0 selfloop transitions, 0 changer transitions 69/69 dead transitions. [2023-08-30 16:41:32,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 388 flow [2023-08-30 16:41:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:41:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:41:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-30 16:41:32,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2023-08-30 16:41:32,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-30 16:41:32,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-30 16:41:32,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:32,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-30 16:41:32,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 16:41:32,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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 16:41:32,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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 16:41:32,529 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 205 flow. Second operand 3 states and 228 transitions. [2023-08-30 16:41:32,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 388 flow [2023-08-30 16:41:33,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:41:33,167 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-08-30 16:41:33,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-08-30 16:41:33,168 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-08-30 16:41:33,168 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-08-30 16:41:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 16:41:33,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 9 remaining) [2023-08-30 16:41:33,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-30 16:41:33,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-08-30 16:41:33,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-30 16:41:33,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-30 16:41:33,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-30 16:41:33,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-30 16:41:33,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-30 16:41:33,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-30 16:41:33,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 16:41:33,170 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 16:41:33,170 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:41:33,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 16:41:33,185 INFO L130 PetriNetUnfolder]: 9/183 cut-off events. [2023-08-30 16:41:33,185 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:41:33,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 183 events. 9/183 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 203. Up to 18 conditions per place. [2023-08-30 16:41:33,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 89 transitions, 274 flow [2023-08-30 16:41:33,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 83 transitions, 262 flow [2023-08-30 16:41:33,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:41:33,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 83 transitions, 262 flow [2023-08-30 16:41:33,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 83 transitions, 262 flow [2023-08-30 16:41:33,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 83 transitions, 262 flow [2023-08-30 16:41:33,198 INFO L130 PetriNetUnfolder]: 0/129 cut-off events. [2023-08-30 16:41:33,198 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:41:33,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 129 events. 0/129 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2023-08-30 16:41:33,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 3920 [2023-08-30 16:41:34,726 INFO L134 LiptonReduction]: Checked pairs total: 12136 [2023-08-30 16:41:34,726 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-30 16:41:34,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:41:34,727 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:41:34,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:41:34,732 INFO L130 PetriNetUnfolder]: 0/56 cut-off events. [2023-08-30 16:41:34,734 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:41:34,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:34,735 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:34,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:41:34,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1441986767, now seen corresponding path program 1 times [2023-08-30 16:41:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:34,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001445454] [2023-08-30 16:41:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:41:34,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:41:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:41:34,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:41:34,800 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:41:34,801 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:41:34,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 16:41:34,801 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:41:34,802 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:41:34,802 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:41:34,802 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-30 16:41:34,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:41:34,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 97 transitions, 311 flow [2023-08-30 16:41:34,852 INFO L130 PetriNetUnfolder]: 10/203 cut-off events. [2023-08-30 16:41:34,852 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 16:41:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 203 events. 10/203 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 334 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 234. Up to 20 conditions per place. [2023-08-30 16:41:34,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 97 transitions, 311 flow [2023-08-30 16:41:34,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 97 transitions, 311 flow [2023-08-30 16:41:34,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:41:34,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 97 transitions, 311 flow [2023-08-30 16:41:34,855 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 97 transitions, 311 flow [2023-08-30 16:41:34,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 97 transitions, 311 flow [2023-08-30 16:41:34,892 INFO L130 PetriNetUnfolder]: 10/203 cut-off events. [2023-08-30 16:41:34,892 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 16:41:34,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 203 events. 10/203 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 334 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 234. Up to 20 conditions per place. [2023-08-30 16:41:34,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 5670 [2023-08-30 16:41:36,240 INFO L134 LiptonReduction]: Checked pairs total: 14090 [2023-08-30 16:41:36,240 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 16:41:36,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:41:36,242 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;@f26c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:41:36,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 16:41:36,243 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:41:36,243 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:41:36,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:36,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:41:36,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 16:41:36,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash 42932051, now seen corresponding path program 1 times [2023-08-30 16:41:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:36,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082744540] [2023-08-30 16:41:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:36,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:36,315 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 16:41:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:36,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082744540] [2023-08-30 16:41:36,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082744540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:36,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:36,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:41:36,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275540548] [2023-08-30 16:41:36,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:36,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:41:36,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:41:36,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:41:36,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 153 [2023-08-30 16:41:36,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 16:41:36,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:36,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 153 [2023-08-30 16:41:36,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand