./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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 ../sv-benchmarks/c/weaver/unroll-2.wvr.c -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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:42:18,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:42:18,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:42:18,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:42:18,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:42:18,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:42:18,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:42:18,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:42:18,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:42:18,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:42:18,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:42:18,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:42:18,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:42:18,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:42:18,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:42:18,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:42:18,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:42:18,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:42:18,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:42:18,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:42:18,231 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:42:18,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:42:18,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:42:18,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:42:18,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:42:18,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:42:18,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:42:18,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:42:18,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:42:18,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:42:18,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:42:18,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:42:18,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:42:18,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:42:18,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:42:18,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:42:18,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:42:18,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:42:18,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:42:18,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:42:18,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:42:18,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:42:18,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:42:18,267 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:42:18,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:42:18,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:42:18,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:42:18,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:42:18,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:42:18,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:42:18,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:42:18,270 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:42:18,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:42:18,270 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:42:18,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:42:18,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:42:18,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:42:18,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:42:18,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:42:18,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:42:18,271 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:42:18,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:42:18,271 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:42:18,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:42:18,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:42:18,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:42:18,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:42:18,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:42:18,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:42:18,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:42:18,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:42:18,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:42:18,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:42:18,273 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:42:18,273 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:42:18,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:42:18,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2022-07-12 10:42:18,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:42:18,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:42:18,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:42:18,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:42:18,498 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:42:18,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-07-12 10:42:18,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04ed1b93a/9c155229430349db8fa418816d615e1c/FLAG7931f291c [2022-07-12 10:42:18,856 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:42:18,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-07-12 10:42:18,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04ed1b93a/9c155229430349db8fa418816d615e1c/FLAG7931f291c [2022-07-12 10:42:19,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04ed1b93a/9c155229430349db8fa418816d615e1c [2022-07-12 10:42:19,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:42:19,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:42:19,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:42:19,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:42:19,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:42:19,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70876189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19, skipping insertion in model container [2022-07-12 10:42:19,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:42:19,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:42:19,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-07-12 10:42:19,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:42:19,495 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:42:19,524 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-07-12 10:42:19,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:42:19,537 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:42:19,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19 WrapperNode [2022-07-12 10:42:19,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:42:19,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:42:19,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:42:19,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:42:19,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,570 INFO L137 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2022-07-12 10:42:19,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:42:19,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:42:19,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:42:19,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:42:19,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:42:19,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:42:19,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:42:19,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:42:19,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (1/1) ... [2022-07-12 10:42:19,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:42:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:19,609 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) [2022-07-12 10:42:19,621 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 [2022-07-12 10:42:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:42:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:42:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:42:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:42:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:42:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:42:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:42:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:42:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:42:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:42:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:42:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:42:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:42:19,646 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:42:19,694 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:42:19,696 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:42:19,866 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:42:19,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:42:19,872 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:42:19,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:42:19 BoogieIcfgContainer [2022-07-12 10:42:19,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:42:19,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:42:19,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:42:19,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:42:19,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:42:19" (1/3) ... [2022-07-12 10:42:19,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1bea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:42:19, skipping insertion in model container [2022-07-12 10:42:19,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:42:19" (2/3) ... [2022-07-12 10:42:19,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1bea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:42:19, skipping insertion in model container [2022-07-12 10:42:19,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:42:19" (3/3) ... [2022-07-12 10:42:19,879 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-07-12 10:42:19,882 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:42:19,888 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:42:19,888 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:42:19,888 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:42:19,939 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:42:19,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 171 transitions, 358 flow [2022-07-12 10:42:20,014 INFO L129 PetriNetUnfolder]: 14/169 cut-off events. [2022-07-12 10:42:20,014 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:42:20,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-07-12 10:42:20,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 171 transitions, 358 flow [2022-07-12 10:42:20,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 332 flow [2022-07-12 10:42:20,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:42:20,038 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a478e09, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@10ea94c9 [2022-07-12 10:42:20,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:42:20,065 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-12 10:42:20,067 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:42:20,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:20,068 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:20,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1481437362, now seen corresponding path program 1 times [2022-07-12 10:42:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:20,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340654065] [2022-07-12 10:42:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:20,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:20,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:20,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340654065] [2022-07-12 10:42:20,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340654065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:42:20,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:42:20,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:42:20,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783275226] [2022-07-12 10:42:20,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:20,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:42:20,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:42:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:42:20,306 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 171 [2022-07-12 10:42:20,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 160 transitions, 332 flow. Second operand has 2 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 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) [2022-07-12 10:42:20,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:20,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 171 [2022-07-12 10:42:20,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:20,347 INFO L129 PetriNetUnfolder]: 3/149 cut-off events. [2022-07-12 10:42:20,348 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:42:20,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 149 events. 3/149 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 142 event pairs, 0 based on Foata normal form. 14/152 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-07-12 10:42:20,349 INFO L132 encePairwiseOnDemand]: 160/171 looper letters, 4 selfloop transitions, 0 changer transitions 5/149 dead transitions. [2022-07-12 10:42:20,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 149 transitions, 318 flow [2022-07-12 10:42:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:42:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:42:20,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 325 transitions. [2022-07-12 10:42:20,358 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9502923976608187 [2022-07-12 10:42:20,359 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 325 transitions. [2022-07-12 10:42:20,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 325 transitions. [2022-07-12 10:42:20,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:20,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 325 transitions. [2022-07-12 10:42:20,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 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) [2022-07-12 10:42:20,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:20,375 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:20,376 INFO L186 Difference]: Start difference. First operand has 153 places, 160 transitions, 332 flow. Second operand 2 states and 325 transitions. [2022-07-12 10:42:20,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 149 transitions, 318 flow [2022-07-12 10:42:20,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 149 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:42:20,382 INFO L242 Difference]: Finished difference. Result has 150 places, 144 transitions, 292 flow [2022-07-12 10:42:20,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=292, PETRI_PLACES=150, PETRI_TRANSITIONS=144} [2022-07-12 10:42:20,385 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, -3 predicate places. [2022-07-12 10:42:20,385 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 144 transitions, 292 flow [2022-07-12 10:42:20,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 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) [2022-07-12 10:42:20,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:20,386 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:20,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:42:20,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1667863150, now seen corresponding path program 1 times [2022-07-12 10:42:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:20,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595207785] [2022-07-12 10:42:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:20,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595207785] [2022-07-12 10:42:20,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595207785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:42:20,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:42:20,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:42:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104406606] [2022-07-12 10:42:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:20,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:42:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:42:20,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:42:20,624 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 171 [2022-07-12 10:42:20,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 144 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:42:20,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:20,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 171 [2022-07-12 10:42:20,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:20,765 INFO L129 PetriNetUnfolder]: 16/244 cut-off events. [2022-07-12 10:42:20,766 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:42:20,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 244 events. 16/244 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 538 event pairs, 5 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 308. Up to 49 conditions per place. [2022-07-12 10:42:20,768 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 36 selfloop transitions, 7 changer transitions 0/148 dead transitions. [2022-07-12 10:42:20,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 148 transitions, 386 flow [2022-07-12 10:42:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:42:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:42:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 964 transitions. [2022-07-12 10:42:20,775 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7046783625730995 [2022-07-12 10:42:20,776 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 964 transitions. [2022-07-12 10:42:20,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 964 transitions. [2022-07-12 10:42:20,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:20,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 964 transitions. [2022-07-12 10:42:20,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.5) internal successors, (964), 8 states have internal predecessors, (964), 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) [2022-07-12 10:42:20,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 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) [2022-07-12 10:42:20,783 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 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) [2022-07-12 10:42:20,783 INFO L186 Difference]: Start difference. First operand has 150 places, 144 transitions, 292 flow. Second operand 8 states and 964 transitions. [2022-07-12 10:42:20,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 148 transitions, 386 flow [2022-07-12 10:42:20,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:42:20,791 INFO L242 Difference]: Finished difference. Result has 153 places, 145 transitions, 314 flow [2022-07-12 10:42:20,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=153, PETRI_TRANSITIONS=145} [2022-07-12 10:42:20,792 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 0 predicate places. [2022-07-12 10:42:20,792 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 145 transitions, 314 flow [2022-07-12 10:42:20,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:42:20,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:20,794 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:42:20,794 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1651907158, now seen corresponding path program 1 times [2022-07-12 10:42:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:20,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225511607] [2022-07-12 10:42:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:21,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225511607] [2022-07-12 10:42:21,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225511607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:42:21,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:42:21,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:42:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375379739] [2022-07-12 10:42:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:21,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:42:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:42:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:42:21,004 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 171 [2022-07-12 10:42:21,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 145 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 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) [2022-07-12 10:42:21,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:21,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 171 [2022-07-12 10:42:21,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:21,122 INFO L129 PetriNetUnfolder]: 73/531 cut-off events. [2022-07-12 10:42:21,122 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-12 10:42:21,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 531 events. 73/531 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2573 event pairs, 20 based on Foata normal form. 1/491 useless extension candidates. Maximal degree in co-relation 722. Up to 79 conditions per place. [2022-07-12 10:42:21,125 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 53 selfloop transitions, 5 changer transitions 4/172 dead transitions. [2022-07-12 10:42:21,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 497 flow [2022-07-12 10:42:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:42:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:42:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2022-07-12 10:42:21,127 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7573099415204678 [2022-07-12 10:42:21,127 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2022-07-12 10:42:21,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2022-07-12 10:42:21,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:21,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2022-07-12 10:42:21,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 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) [2022-07-12 10:42:21,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:21,131 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:21,131 INFO L186 Difference]: Start difference. First operand has 153 places, 145 transitions, 314 flow. Second operand 6 states and 777 transitions. [2022-07-12 10:42:21,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 497 flow [2022-07-12 10:42:21,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 172 transitions, 485 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:42:21,134 INFO L242 Difference]: Finished difference. Result has 155 places, 148 transitions, 331 flow [2022-07-12 10:42:21,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=148} [2022-07-12 10:42:21,135 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 2 predicate places. [2022-07-12 10:42:21,135 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 148 transitions, 331 flow [2022-07-12 10:42:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 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) [2022-07-12 10:42:21,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:21,136 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:21,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:42:21,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash 993199323, now seen corresponding path program 1 times [2022-07-12 10:42:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:21,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658005796] [2022-07-12 10:42:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:21,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658005796] [2022-07-12 10:42:21,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658005796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:21,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036278450] [2022-07-12 10:42:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:21,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:21,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:21,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:21,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:42:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:42:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:21,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:21,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036278450] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:21,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:42:21,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-12 10:42:21,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400519581] [2022-07-12 10:42:21,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:21,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:42:21,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:21,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:42:21,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:42:21,621 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 171 [2022-07-12 10:42:21,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 148 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 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) [2022-07-12 10:42:21,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:21,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 171 [2022-07-12 10:42:21,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:21,710 INFO L129 PetriNetUnfolder]: 80/582 cut-off events. [2022-07-12 10:42:21,711 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-12 10:42:21,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 582 events. 80/582 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2941 event pairs, 13 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 777. Up to 79 conditions per place. [2022-07-12 10:42:21,716 INFO L132 encePairwiseOnDemand]: 166/171 looper letters, 22 selfloop transitions, 5 changer transitions 1/160 dead transitions. [2022-07-12 10:42:21,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 415 flow [2022-07-12 10:42:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:42:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:42:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2022-07-12 10:42:21,719 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8786549707602339 [2022-07-12 10:42:21,719 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2022-07-12 10:42:21,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2022-07-12 10:42:21,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:21,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2022-07-12 10:42:21,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 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) [2022-07-12 10:42:21,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 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) [2022-07-12 10:42:21,726 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 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) [2022-07-12 10:42:21,726 INFO L186 Difference]: Start difference. First operand has 155 places, 148 transitions, 331 flow. Second operand 4 states and 601 transitions. [2022-07-12 10:42:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 415 flow [2022-07-12 10:42:21,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 160 transitions, 411 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-12 10:42:21,730 INFO L242 Difference]: Finished difference. Result has 157 places, 152 transitions, 363 flow [2022-07-12 10:42:21,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=363, PETRI_PLACES=157, PETRI_TRANSITIONS=152} [2022-07-12 10:42:21,732 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 4 predicate places. [2022-07-12 10:42:21,732 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 152 transitions, 363 flow [2022-07-12 10:42:21,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 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) [2022-07-12 10:42:21,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:21,732 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:21,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:21,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1049045293, now seen corresponding path program 2 times [2022-07-12 10:42:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:21,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256691318] [2022-07-12 10:42:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:22,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:22,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256691318] [2022-07-12 10:42:22,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256691318] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:42:22,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:42:22,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:42:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219049484] [2022-07-12 10:42:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:22,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:42:22,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:42:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:42:22,032 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-12 10:42:22,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 152 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 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) [2022-07-12 10:42:22,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:22,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-12 10:42:22,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:22,184 INFO L129 PetriNetUnfolder]: 131/795 cut-off events. [2022-07-12 10:42:22,184 INFO L130 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-07-12 10:42:22,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1261 conditions, 795 events. 131/795 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4541 event pairs, 34 based on Foata normal form. 7/755 useless extension candidates. Maximal degree in co-relation 1252. Up to 123 conditions per place. [2022-07-12 10:42:22,187 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 11 changer transitions 5/194 dead transitions. [2022-07-12 10:42:22,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 194 transitions, 641 flow [2022-07-12 10:42:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:42:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:42:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2022-07-12 10:42:22,190 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8762183235867447 [2022-07-12 10:42:22,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2022-07-12 10:42:22,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2022-07-12 10:42:22,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:22,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2022-07-12 10:42:22,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 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) [2022-07-12 10:42:22,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:22,194 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:22,194 INFO L186 Difference]: Start difference. First operand has 157 places, 152 transitions, 363 flow. Second operand 6 states and 899 transitions. [2022-07-12 10:42:22,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 194 transitions, 641 flow [2022-07-12 10:42:22,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 194 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:42:22,197 INFO L242 Difference]: Finished difference. Result has 166 places, 162 transitions, 463 flow [2022-07-12 10:42:22,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2022-07-12 10:42:22,198 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 13 predicate places. [2022-07-12 10:42:22,198 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 463 flow [2022-07-12 10:42:22,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 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) [2022-07-12 10:42:22,199 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:22,199 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:22,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:42:22,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 431742831, now seen corresponding path program 3 times [2022-07-12 10:42:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:22,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642280606] [2022-07-12 10:42:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:22,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:22,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642280606] [2022-07-12 10:42:22,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642280606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:22,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494873907] [2022-07-12 10:42:22,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:42:22,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:22,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:22,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:22,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:42:22,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:42:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:22,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:42:22,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:22,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:22,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494873907] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:22,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:22,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-12 10:42:22,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396664911] [2022-07-12 10:42:22,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:22,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:42:22,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:42:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-12 10:42:22,554 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-12 10:42:22,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 463 flow. Second operand has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 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) [2022-07-12 10:42:22,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:22,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-12 10:42:22,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:22,699 INFO L129 PetriNetUnfolder]: 146/920 cut-off events. [2022-07-12 10:42:22,700 INFO L130 PetriNetUnfolder]: For 601/601 co-relation queries the response was YES. [2022-07-12 10:42:22,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1709 conditions, 920 events. 146/920 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5292 event pairs, 41 based on Foata normal form. 11/875 useless extension candidates. Maximal degree in co-relation 1695. Up to 144 conditions per place. [2022-07-12 10:42:22,704 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 19 changer transitions 6/203 dead transitions. [2022-07-12 10:42:22,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 805 flow [2022-07-12 10:42:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:42:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:42:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1039 transitions. [2022-07-12 10:42:22,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680033416875522 [2022-07-12 10:42:22,707 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1039 transitions. [2022-07-12 10:42:22,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1039 transitions. [2022-07-12 10:42:22,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:22,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1039 transitions. [2022-07-12 10:42:22,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 148.42857142857142) internal successors, (1039), 7 states have internal predecessors, (1039), 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) [2022-07-12 10:42:22,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-07-12 10:42:22,711 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-07-12 10:42:22,711 INFO L186 Difference]: Start difference. First operand has 166 places, 162 transitions, 463 flow. Second operand 7 states and 1039 transitions. [2022-07-12 10:42:22,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 805 flow [2022-07-12 10:42:22,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 203 transitions, 805 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:42:22,716 INFO L242 Difference]: Finished difference. Result has 176 places, 171 transitions, 618 flow [2022-07-12 10:42:22,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=176, PETRI_TRANSITIONS=171} [2022-07-12 10:42:22,717 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 23 predicate places. [2022-07-12 10:42:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 171 transitions, 618 flow [2022-07-12 10:42:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 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) [2022-07-12 10:42:22,717 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:22,717 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:22,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:22,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 10:42:22,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1255643103, now seen corresponding path program 4 times [2022-07-12 10:42:22,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122110335] [2022-07-12 10:42:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:22,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122110335] [2022-07-12 10:42:22,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122110335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:42:22,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:42:22,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:42:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743440386] [2022-07-12 10:42:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:22,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:42:22,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:42:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:42:22,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-12 10:42:22,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 171 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 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) [2022-07-12 10:42:22,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:22,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-12 10:42:22,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:23,122 INFO L129 PetriNetUnfolder]: 144/876 cut-off events. [2022-07-12 10:42:23,123 INFO L130 PetriNetUnfolder]: For 1298/1298 co-relation queries the response was YES. [2022-07-12 10:42:23,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1877 conditions, 876 events. 144/876 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4898 event pairs, 59 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 1859. Up to 187 conditions per place. [2022-07-12 10:42:23,127 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 38 selfloop transitions, 10 changer transitions 9/186 dead transitions. [2022-07-12 10:42:23,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 186 transitions, 807 flow [2022-07-12 10:42:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:42:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:42:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 878 transitions. [2022-07-12 10:42:23,130 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8557504873294347 [2022-07-12 10:42:23,130 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 878 transitions. [2022-07-12 10:42:23,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 878 transitions. [2022-07-12 10:42:23,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:23,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 878 transitions. [2022-07-12 10:42:23,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.33333333333334) internal successors, (878), 6 states have internal predecessors, (878), 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) [2022-07-12 10:42:23,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:23,133 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:23,133 INFO L186 Difference]: Start difference. First operand has 176 places, 171 transitions, 618 flow. Second operand 6 states and 878 transitions. [2022-07-12 10:42:23,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 186 transitions, 807 flow [2022-07-12 10:42:23,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 186 transitions, 791 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-12 10:42:23,138 INFO L242 Difference]: Finished difference. Result has 184 places, 171 transitions, 638 flow [2022-07-12 10:42:23,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=638, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2022-07-12 10:42:23,139 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 31 predicate places. [2022-07-12 10:42:23,139 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 638 flow [2022-07-12 10:42:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 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) [2022-07-12 10:42:23,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:23,140 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:23,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:42:23,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2007351072, now seen corresponding path program 1 times [2022-07-12 10:42:23,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:23,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593224636] [2022-07-12 10:42:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:23,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:23,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593224636] [2022-07-12 10:42:23,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593224636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:42:23,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:42:23,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:42:23,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956768058] [2022-07-12 10:42:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:23,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:42:23,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:42:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:42:23,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-12 10:42:23,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 171 transitions, 638 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 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) [2022-07-12 10:42:23,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:23,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-12 10:42:23,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:23,369 INFO L129 PetriNetUnfolder]: 168/1041 cut-off events. [2022-07-12 10:42:23,369 INFO L130 PetriNetUnfolder]: For 1574/1574 co-relation queries the response was YES. [2022-07-12 10:42:23,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 1041 events. 168/1041 cut-off events. For 1574/1574 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6315 event pairs, 44 based on Foata normal form. 6/982 useless extension candidates. Maximal degree in co-relation 2177. Up to 175 conditions per place. [2022-07-12 10:42:23,375 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 46 selfloop transitions, 18 changer transitions 5/198 dead transitions. [2022-07-12 10:42:23,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 198 transitions, 922 flow [2022-07-12 10:42:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:42:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:42:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1034 transitions. [2022-07-12 10:42:23,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8638262322472848 [2022-07-12 10:42:23,377 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1034 transitions. [2022-07-12 10:42:23,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1034 transitions. [2022-07-12 10:42:23,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:23,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1034 transitions. [2022-07-12 10:42:23,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 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) [2022-07-12 10:42:23,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-07-12 10:42:23,382 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-07-12 10:42:23,382 INFO L186 Difference]: Start difference. First operand has 184 places, 171 transitions, 638 flow. Second operand 7 states and 1034 transitions. [2022-07-12 10:42:23,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 198 transitions, 922 flow [2022-07-12 10:42:23,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 198 transitions, 888 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-12 10:42:23,387 INFO L242 Difference]: Finished difference. Result has 186 places, 175 transitions, 703 flow [2022-07-12 10:42:23,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=186, PETRI_TRANSITIONS=175} [2022-07-12 10:42:23,388 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 33 predicate places. [2022-07-12 10:42:23,388 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 175 transitions, 703 flow [2022-07-12 10:42:23,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 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) [2022-07-12 10:42:23,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:23,389 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:23,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:42:23,389 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash 301519184, now seen corresponding path program 2 times [2022-07-12 10:42:23,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:23,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410981190] [2022-07-12 10:42:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:23,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:23,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:23,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410981190] [2022-07-12 10:42:23,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410981190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:42:23,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:42:23,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:42:23,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974526526] [2022-07-12 10:42:23,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:42:23,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:42:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:23,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:42:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:42:23,457 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-07-12 10:42:23,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 175 transitions, 703 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 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) [2022-07-12 10:42:23,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:23,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-07-12 10:42:23,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:23,572 INFO L129 PetriNetUnfolder]: 161/974 cut-off events. [2022-07-12 10:42:23,572 INFO L130 PetriNetUnfolder]: For 1694/1694 co-relation queries the response was YES. [2022-07-12 10:42:23,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2126 conditions, 974 events. 161/974 cut-off events. For 1694/1694 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5532 event pairs, 44 based on Foata normal form. 8/921 useless extension candidates. Maximal degree in co-relation 2103. Up to 168 conditions per place. [2022-07-12 10:42:23,578 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 49 selfloop transitions, 19 changer transitions 4/201 dead transitions. [2022-07-12 10:42:23,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 201 transitions, 994 flow [2022-07-12 10:42:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:42:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:42:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 893 transitions. [2022-07-12 10:42:23,581 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8703703703703703 [2022-07-12 10:42:23,581 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 893 transitions. [2022-07-12 10:42:23,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 893 transitions. [2022-07-12 10:42:23,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:23,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 893 transitions. [2022-07-12 10:42:23,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.83333333333334) internal successors, (893), 6 states have internal predecessors, (893), 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) [2022-07-12 10:42:23,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:23,585 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2022-07-12 10:42:23,585 INFO L186 Difference]: Start difference. First operand has 186 places, 175 transitions, 703 flow. Second operand 6 states and 893 transitions. [2022-07-12 10:42:23,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 201 transitions, 994 flow [2022-07-12 10:42:23,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 201 transitions, 949 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-07-12 10:42:23,591 INFO L242 Difference]: Finished difference. Result has 191 places, 175 transitions, 724 flow [2022-07-12 10:42:23,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=191, PETRI_TRANSITIONS=175} [2022-07-12 10:42:23,592 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 38 predicate places. [2022-07-12 10:42:23,592 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 175 transitions, 724 flow [2022-07-12 10:42:23,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 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) [2022-07-12 10:42:23,593 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:23,593 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:23,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:42:23,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1718782997, now seen corresponding path program 1 times [2022-07-12 10:42:23,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:23,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290869491] [2022-07-12 10:42:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:23,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:42:23,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:23,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290869491] [2022-07-12 10:42:23,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290869491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:23,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310255387] [2022-07-12 10:42:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:23,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:23,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:23,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:42:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:23,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 10:42:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:24,130 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-12 10:42:24,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-07-12 10:42:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:24,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:24,464 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-12 10:42:24,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 10:42:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:24,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310255387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:24,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:24,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 33 [2022-07-12 10:42:24,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951495831] [2022-07-12 10:42:24,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:24,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:42:24,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:24,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:42:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:42:24,954 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2022-07-12 10:42:24,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 175 transitions, 724 flow. Second operand has 33 states, 33 states have (on average 83.81818181818181) internal successors, (2766), 33 states have internal predecessors, (2766), 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) [2022-07-12 10:42:24,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:24,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2022-07-12 10:42:24,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:32,708 INFO L129 PetriNetUnfolder]: 7192/15720 cut-off events. [2022-07-12 10:42:32,708 INFO L130 PetriNetUnfolder]: For 19270/19522 co-relation queries the response was YES. [2022-07-12 10:42:32,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37935 conditions, 15720 events. 7192/15720 cut-off events. For 19270/19522 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 137897 event pairs, 321 based on Foata normal form. 439/15299 useless extension candidates. Maximal degree in co-relation 37911. Up to 2422 conditions per place. [2022-07-12 10:42:32,797 INFO L132 encePairwiseOnDemand]: 132/171 looper letters, 694 selfloop transitions, 335 changer transitions 193/1297 dead transitions. [2022-07-12 10:42:32,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1297 transitions, 7198 flow [2022-07-12 10:42:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-07-12 10:42:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2022-07-12 10:42:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 12402 transitions. [2022-07-12 10:42:32,813 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5036549707602339 [2022-07-12 10:42:32,813 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 12402 transitions. [2022-07-12 10:42:32,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 12402 transitions. [2022-07-12 10:42:32,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:32,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 12402 transitions. [2022-07-12 10:42:32,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 86.125) internal successors, (12402), 144 states have internal predecessors, (12402), 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) [2022-07-12 10:42:32,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 171.0) internal successors, (24795), 145 states have internal predecessors, (24795), 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) [2022-07-12 10:42:32,868 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 171.0) internal successors, (24795), 145 states have internal predecessors, (24795), 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) [2022-07-12 10:42:32,868 INFO L186 Difference]: Start difference. First operand has 191 places, 175 transitions, 724 flow. Second operand 144 states and 12402 transitions. [2022-07-12 10:42:32,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1297 transitions, 7198 flow [2022-07-12 10:42:32,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1297 transitions, 7014 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-07-12 10:42:32,901 INFO L242 Difference]: Finished difference. Result has 428 places, 500 transitions, 3635 flow [2022-07-12 10:42:32,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=3635, PETRI_PLACES=428, PETRI_TRANSITIONS=500} [2022-07-12 10:42:32,903 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 275 predicate places. [2022-07-12 10:42:32,903 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 500 transitions, 3635 flow [2022-07-12 10:42:32,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 83.81818181818181) internal successors, (2766), 33 states have internal predecessors, (2766), 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) [2022-07-12 10:42:32,904 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:32,904 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:32,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:33,119 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1025215518, now seen corresponding path program 2 times [2022-07-12 10:42:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:33,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351201177] [2022-07-12 10:42:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:33,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:33,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:33,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351201177] [2022-07-12 10:42:33,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351201177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:33,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356752162] [2022-07-12 10:42:33,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:42:33,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:33,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:33,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:33,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:42:33,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:42:33,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 10:42:33,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:33,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:42:33,772 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 10:42:33,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 10:42:33,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:42:33,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-12 10:42:34,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 10:42:34,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:42:34,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:42:35,022 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:42:35,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-12 10:42:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:42:35,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:37,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:42:37,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-12 10:42:37,041 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-12 10:42:37,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2022-07-12 10:42:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:42:37,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2022-07-12 10:42:37,056 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 10:42:37,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2022-07-12 10:42:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:42:37,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356752162] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:37,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:37,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 27] total 72 [2022-07-12 10:42:37,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715532440] [2022-07-12 10:42:37,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:37,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-12 10:42:37,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-12 10:42:37,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=4534, Unknown=69, NotChecked=0, Total=5112 [2022-07-12 10:42:37,407 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 171 [2022-07-12 10:42:37,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 500 transitions, 3635 flow. Second operand has 72 states, 72 states have (on average 69.16666666666667) internal successors, (4980), 72 states have internal predecessors, (4980), 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) [2022-07-12 10:42:37,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:37,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 171 [2022-07-12 10:42:37,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:43:04,002 INFO L129 PetriNetUnfolder]: 18834/43357 cut-off events. [2022-07-12 10:43:04,002 INFO L130 PetriNetUnfolder]: For 1240841/1242177 co-relation queries the response was YES. [2022-07-12 10:43:04,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286318 conditions, 43357 events. 18834/43357 cut-off events. For 1240841/1242177 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 453702 event pairs, 2803 based on Foata normal form. 449/42005 useless extension candidates. Maximal degree in co-relation 286195. Up to 9970 conditions per place. [2022-07-12 10:43:05,091 INFO L132 encePairwiseOnDemand]: 125/171 looper letters, 1266 selfloop transitions, 806 changer transitions 51/2330 dead transitions. [2022-07-12 10:43:05,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 2330 transitions, 30909 flow [2022-07-12 10:43:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-07-12 10:43:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2022-07-12 10:43:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 14342 transitions. [2022-07-12 10:43:05,102 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42791502565938655 [2022-07-12 10:43:05,102 INFO L72 ComplementDD]: Start complementDD. Operand 196 states and 14342 transitions. [2022-07-12 10:43:05,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 14342 transitions. [2022-07-12 10:43:05,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:43:05,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 196 states and 14342 transitions. [2022-07-12 10:43:05,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 197 states, 196 states have (on average 73.1734693877551) internal successors, (14342), 196 states have internal predecessors, (14342), 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) [2022-07-12 10:43:05,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 197 states, 197 states have (on average 171.0) internal successors, (33687), 197 states have internal predecessors, (33687), 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) [2022-07-12 10:43:05,160 INFO L81 ComplementDD]: Finished complementDD. Result has 197 states, 197 states have (on average 171.0) internal successors, (33687), 197 states have internal predecessors, (33687), 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) [2022-07-12 10:43:05,160 INFO L186 Difference]: Start difference. First operand has 428 places, 500 transitions, 3635 flow. Second operand 196 states and 14342 transitions. [2022-07-12 10:43:05,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 2330 transitions, 30909 flow [2022-07-12 10:43:07,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 2330 transitions, 30118 flow, removed 337 selfloop flow, removed 16 redundant places. [2022-07-12 10:43:07,186 INFO L242 Difference]: Finished difference. Result has 735 places, 1330 transitions, 15074 flow [2022-07-12 10:43:07,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=196, PETRI_FLOW=15074, PETRI_PLACES=735, PETRI_TRANSITIONS=1330} [2022-07-12 10:43:07,187 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 582 predicate places. [2022-07-12 10:43:07,187 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 1330 transitions, 15074 flow [2022-07-12 10:43:07,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 69.16666666666667) internal successors, (4980), 72 states have internal predecessors, (4980), 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) [2022-07-12 10:43:07,189 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:43:07,189 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:43:07,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:43:07,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:07,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:43:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:43:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash 424760084, now seen corresponding path program 3 times [2022-07-12 10:43:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:43:07,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801278641] [2022-07-12 10:43:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:43:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:43:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:43:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:43:07,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:43:07,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801278641] [2022-07-12 10:43:07,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801278641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:43:07,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941875034] [2022-07-12 10:43:07,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:43:07,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:43:07,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:43:07,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:43:07,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:43:08,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:43:08,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:43:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 10:43:08,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:43:09,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 10:43:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:43:09,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:43:09,275 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-12 10:43:09,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 10:43:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:43:09,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941875034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:43:09,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:43:09,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 20] total 59 [2022-07-12 10:43:09,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894695180] [2022-07-12 10:43:09,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:43:09,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 10:43:09,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:43:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 10:43:09,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=3076, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 10:43:09,635 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2022-07-12 10:43:09,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1330 transitions, 15074 flow. Second operand has 59 states, 59 states have (on average 79.66101694915254) internal successors, (4700), 59 states have internal predecessors, (4700), 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) [2022-07-12 10:43:09,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:43:09,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2022-07-12 10:43:09,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand