./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/popl20-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:14:47,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:14:47,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:14:47,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:14:47,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:14:47,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:14:47,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:14:47,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:14:47,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:14:47,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:14:47,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:14:47,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:14:47,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:14:47,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:14:47,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:14:47,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:14:47,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:14:47,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:14:47,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:14:47,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:14:47,222 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:14:47,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:14:47,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:14:47,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:14:47,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:14:47,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:14:47,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:14:47,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:14:47,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:14:47,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:14:47,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:14:47,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:14:47,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:14:47,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:14:47,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:14:47,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:14:47,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:14:47,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:14:47,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:14:47,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:14:47,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:14:47,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:14:47,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:14:47,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:14:47,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:14:47,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:14:47,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:14:47,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:14:47,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:14:47,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:14:47,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:14:47,266 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:14:47,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:14:47,267 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:14:47,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:14:47,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:14:47,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:14:47,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:14:47,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:14:47,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:14:47,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:14:47,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:14:47,269 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:14:47,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:14:47,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:14:47,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:14:47,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:14:47,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:14:47,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:14:47,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:14:47,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:14:47,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:14:47,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:14:47,271 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:14:47,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:14:47,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:14:47,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-07-13 22:14:47,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:14:47,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:14:47,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:14:47,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:14:47,467 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:14:47,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-07-13 22:14:47,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba4bd88f/fd0b2bc3ed4b4bb3befd9bab7a44fa26/FLAG48cb18ac5 [2022-07-13 22:14:47,873 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:14:47,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-07-13 22:14:47,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba4bd88f/fd0b2bc3ed4b4bb3befd9bab7a44fa26/FLAG48cb18ac5 [2022-07-13 22:14:48,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba4bd88f/fd0b2bc3ed4b4bb3befd9bab7a44fa26 [2022-07-13 22:14:48,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:14:48,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:14:48,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:14:48,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:14:48,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:14:48,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6372508f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48, skipping insertion in model container [2022-07-13 22:14:48,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:14:48,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:14:48,477 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/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-07-13 22:14:48,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:14:48,498 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:14:48,512 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/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-07-13 22:14:48,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:14:48,523 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:14:48,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48 WrapperNode [2022-07-13 22:14:48,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:14:48,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:14:48,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:14:48,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:14:48,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,552 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2022-07-13 22:14:48,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:14:48,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:14:48,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:14:48,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:14:48,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:14:48,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:14:48,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:14:48,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:14:48,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (1/1) ... [2022-07-13 22:14:48,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:14:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:14:48,609 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) [2022-07-13 22:14:48,631 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 [2022-07-13 22:14:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:14:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:14:48,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:14:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:14:48,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:14:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:14:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:14:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:14:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:14:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:14:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:14:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:14:48,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:14:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:14:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:14:48,644 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:14:48,720 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:14:48,721 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:14:48,933 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:14:49,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:14:49,005 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 22:14:49,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:14:49 BoogieIcfgContainer [2022-07-13 22:14:49,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:14:49,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:14:49,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:14:49,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:14:49,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:14:48" (1/3) ... [2022-07-13 22:14:49,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cf596f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:14:49, skipping insertion in model container [2022-07-13 22:14:49,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:14:48" (2/3) ... [2022-07-13 22:14:49,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cf596f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:14:49, skipping insertion in model container [2022-07-13 22:14:49,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:14:49" (3/3) ... [2022-07-13 22:14:49,015 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2022-07-13 22:14:49,019 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:14:49,031 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:14:49,031 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:14:49,031 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:14:49,100 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:14:49,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2022-07-13 22:14:49,200 INFO L129 PetriNetUnfolder]: 15/187 cut-off events. [2022-07-13 22:14:49,200 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:14:49,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2022-07-13 22:14:49,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 189 transitions, 394 flow [2022-07-13 22:14:49,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 178 transitions, 368 flow [2022-07-13 22:14:49,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:14:49,224 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@1e45e717, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b6a746 [2022-07-13 22:14:49,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:14:49,252 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2022-07-13 22:14:49,252 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:14:49,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:49,253 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] [2022-07-13 22:14:49,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 577602676, now seen corresponding path program 1 times [2022-07-13 22:14:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:49,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656726688] [2022-07-13 22:14:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:49,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:14:49,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:49,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656726688] [2022-07-13 22:14:49,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656726688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:49,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:49,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:14:49,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219925929] [2022-07-13 22:14:49,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:49,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:14:49,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:14:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:14:49,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 189 [2022-07-13 22:14:49,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 178 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 174.5) internal successors, (349), 2 states have internal predecessors, (349), 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) [2022-07-13 22:14:49,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:49,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 189 [2022-07-13 22:14:49,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:49,586 INFO L129 PetriNetUnfolder]: 14/193 cut-off events. [2022-07-13 22:14:49,586 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-13 22:14:49,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 193 events. 14/193 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 3 based on Foata normal form. 15/194 useless extension candidates. Maximal degree in co-relation 147. Up to 20 conditions per place. [2022-07-13 22:14:49,588 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 7 selfloop transitions, 0 changer transitions 6/168 dead transitions. [2022-07-13 22:14:49,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 168 transitions, 362 flow [2022-07-13 22:14:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:14:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:14:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 359 transitions. [2022-07-13 22:14:49,599 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9497354497354498 [2022-07-13 22:14:49,600 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 359 transitions. [2022-07-13 22:14:49,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 359 transitions. [2022-07-13 22:14:49,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:49,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 359 transitions. [2022-07-13 22:14:49,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 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) [2022-07-13 22:14:49,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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) [2022-07-13 22:14:49,618 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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) [2022-07-13 22:14:49,620 INFO L186 Difference]: Start difference. First operand has 170 places, 178 transitions, 368 flow. Second operand 2 states and 359 transitions. [2022-07-13 22:14:49,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 168 transitions, 362 flow [2022-07-13 22:14:49,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 168 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:14:49,628 INFO L242 Difference]: Finished difference. Result has 167 places, 162 transitions, 328 flow [2022-07-13 22:14:49,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2022-07-13 22:14:49,634 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2022-07-13 22:14:49,634 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 328 flow [2022-07-13 22:14:49,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.5) internal successors, (349), 2 states have internal predecessors, (349), 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) [2022-07-13 22:14:49,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:49,635 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] [2022-07-13 22:14:49,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:14:49,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1660907215, now seen corresponding path program 1 times [2022-07-13 22:14:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:49,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517648721] [2022-07-13 22:14:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:14:49,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517648721] [2022-07-13 22:14:49,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517648721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:49,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:49,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:14:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52302513] [2022-07-13 22:14:49,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:49,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:14:49,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:14:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:14:49,927 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 189 [2022-07-13 22:14:49,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 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) [2022-07-13 22:14:49,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:49,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 189 [2022-07-13 22:14:49,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:50,100 INFO L129 PetriNetUnfolder]: 56/309 cut-off events. [2022-07-13 22:14:50,101 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:14:50,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 309 events. 56/309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 848 event pairs, 12 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 445. Up to 64 conditions per place. [2022-07-13 22:14:50,105 INFO L132 encePairwiseOnDemand]: 183/189 looper letters, 45 selfloop transitions, 5 changer transitions 0/171 dead transitions. [2022-07-13 22:14:50,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 171 transitions, 447 flow [2022-07-13 22:14:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:14:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:14:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 837 transitions. [2022-07-13 22:14:50,112 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2022-07-13 22:14:50,112 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 837 transitions. [2022-07-13 22:14:50,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 837 transitions. [2022-07-13 22:14:50,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:50,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 837 transitions. [2022-07-13 22:14:50,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 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) [2022-07-13 22:14:50,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 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) [2022-07-13 22:14:50,119 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 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) [2022-07-13 22:14:50,119 INFO L186 Difference]: Start difference. First operand has 167 places, 162 transitions, 328 flow. Second operand 6 states and 837 transitions. [2022-07-13 22:14:50,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 171 transitions, 447 flow [2022-07-13 22:14:50,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 171 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:14:50,125 INFO L242 Difference]: Finished difference. Result has 167 places, 163 transitions, 346 flow [2022-07-13 22:14:50,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2022-07-13 22:14:50,127 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2022-07-13 22:14:50,127 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 346 flow [2022-07-13 22:14:50,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 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) [2022-07-13 22:14:50,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:50,128 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] [2022-07-13 22:14:50,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:14:50,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:50,130 INFO L85 PathProgramCache]: Analyzing trace with hash 730860721, now seen corresponding path program 1 times [2022-07-13 22:14:50,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:50,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962738434] [2022-07-13 22:14:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:14:50,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:50,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962738434] [2022-07-13 22:14:50,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962738434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:50,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:50,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:14:50,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441880208] [2022-07-13 22:14:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:50,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:14:50,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:14:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:14:50,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 189 [2022-07-13 22:14:50,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 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) [2022-07-13 22:14:50,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:50,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 189 [2022-07-13 22:14:50,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:50,431 INFO L129 PetriNetUnfolder]: 57/353 cut-off events. [2022-07-13 22:14:50,431 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-13 22:14:50,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 353 events. 57/353 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 981 event pairs, 12 based on Foata normal form. 4/338 useless extension candidates. Maximal degree in co-relation 525. Up to 60 conditions per place. [2022-07-13 22:14:50,433 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 46 selfloop transitions, 8 changer transitions 7/182 dead transitions. [2022-07-13 22:14:50,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 182 transitions, 511 flow [2022-07-13 22:14:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:14:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:14:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1158 transitions. [2022-07-13 22:14:50,436 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7658730158730159 [2022-07-13 22:14:50,436 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1158 transitions. [2022-07-13 22:14:50,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1158 transitions. [2022-07-13 22:14:50,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:50,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1158 transitions. [2022-07-13 22:14:50,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.75) internal successors, (1158), 8 states have internal predecessors, (1158), 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) [2022-07-13 22:14:50,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 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) [2022-07-13 22:14:50,443 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 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) [2022-07-13 22:14:50,443 INFO L186 Difference]: Start difference. First operand has 167 places, 163 transitions, 346 flow. Second operand 8 states and 1158 transitions. [2022-07-13 22:14:50,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 182 transitions, 511 flow [2022-07-13 22:14:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 182 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:14:50,448 INFO L242 Difference]: Finished difference. Result has 172 places, 164 transitions, 364 flow [2022-07-13 22:14:50,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=172, PETRI_TRANSITIONS=164} [2022-07-13 22:14:50,450 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2022-07-13 22:14:50,450 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 164 transitions, 364 flow [2022-07-13 22:14:50,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 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) [2022-07-13 22:14:50,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:50,451 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, 1, 1, 1] [2022-07-13 22:14:50,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:14:50,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1033182428, now seen corresponding path program 1 times [2022-07-13 22:14:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:50,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891262036] [2022-07-13 22:14:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:14:50,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891262036] [2022-07-13 22:14:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891262036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:50,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:50,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:14:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484644737] [2022-07-13 22:14:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:50,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:14:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:14:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:14:50,514 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 189 [2022-07-13 22:14:50,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 164 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2022-07-13 22:14:50,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:50,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 189 [2022-07-13 22:14:50,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:50,619 INFO L129 PetriNetUnfolder]: 156/581 cut-off events. [2022-07-13 22:14:50,619 INFO L130 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-07-13 22:14:50,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 581 events. 156/581 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2610 event pairs, 14 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 959. Up to 141 conditions per place. [2022-07-13 22:14:50,622 INFO L132 encePairwiseOnDemand]: 183/189 looper letters, 44 selfloop transitions, 11 changer transitions 0/194 dead transitions. [2022-07-13 22:14:50,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 194 transitions, 558 flow [2022-07-13 22:14:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:14:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:14:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 823 transitions. [2022-07-13 22:14:50,624 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.870899470899471 [2022-07-13 22:14:50,625 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 823 transitions. [2022-07-13 22:14:50,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 823 transitions. [2022-07-13 22:14:50,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:50,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 823 transitions. [2022-07-13 22:14:50,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 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) [2022-07-13 22:14:50,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:14:50,629 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:14:50,629 INFO L186 Difference]: Start difference. First operand has 172 places, 164 transitions, 364 flow. Second operand 5 states and 823 transitions. [2022-07-13 22:14:50,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 194 transitions, 558 flow [2022-07-13 22:14:50,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 194 transitions, 534 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-07-13 22:14:50,633 INFO L242 Difference]: Finished difference. Result has 172 places, 174 transitions, 437 flow [2022-07-13 22:14:50,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=437, PETRI_PLACES=172, PETRI_TRANSITIONS=174} [2022-07-13 22:14:50,633 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2022-07-13 22:14:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 174 transitions, 437 flow [2022-07-13 22:14:50,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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) [2022-07-13 22:14:50,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:50,634 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, 1, 1, 1] [2022-07-13 22:14:50,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:14:50,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2124401224, now seen corresponding path program 2 times [2022-07-13 22:14:50,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:50,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489441001] [2022-07-13 22:14:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:50,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:14:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489441001] [2022-07-13 22:14:50,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489441001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:50,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:50,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:14:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714315915] [2022-07-13 22:14:50,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:50,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:14:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:14:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:14:50,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 189 [2022-07-13 22:14:50,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 174 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 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) [2022-07-13 22:14:50,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:50,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 189 [2022-07-13 22:14:50,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:50,795 INFO L129 PetriNetUnfolder]: 106/528 cut-off events. [2022-07-13 22:14:50,796 INFO L130 PetriNetUnfolder]: For 330/355 co-relation queries the response was YES. [2022-07-13 22:14:50,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 528 events. 106/528 cut-off events. For 330/355 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2395 event pairs, 13 based on Foata normal form. 8/515 useless extension candidates. Maximal degree in co-relation 985. Up to 100 conditions per place. [2022-07-13 22:14:50,799 INFO L132 encePairwiseOnDemand]: 184/189 looper letters, 51 selfloop transitions, 2 changer transitions 4/190 dead transitions. [2022-07-13 22:14:50,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 190 transitions, 630 flow [2022-07-13 22:14:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:14:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:14:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2022-07-13 22:14:50,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7767195767195767 [2022-07-13 22:14:50,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2022-07-13 22:14:50,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2022-07-13 22:14:50,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:50,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2022-07-13 22:14:50,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 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) [2022-07-13 22:14:50,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:14:50,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:14:50,805 INFO L186 Difference]: Start difference. First operand has 172 places, 174 transitions, 437 flow. Second operand 5 states and 734 transitions. [2022-07-13 22:14:50,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 190 transitions, 630 flow [2022-07-13 22:14:50,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 190 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:14:50,810 INFO L242 Difference]: Finished difference. Result has 179 places, 175 transitions, 453 flow [2022-07-13 22:14:50,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=179, PETRI_TRANSITIONS=175} [2022-07-13 22:14:50,810 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 9 predicate places. [2022-07-13 22:14:50,811 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 175 transitions, 453 flow [2022-07-13 22:14:50,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 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) [2022-07-13 22:14:50,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:50,811 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:14:50,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:14:50,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash -8030758, now seen corresponding path program 1 times [2022-07-13 22:14:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:50,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079366508] [2022-07-13 22:14:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:50,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:14:50,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:50,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079366508] [2022-07-13 22:14:50,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079366508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:50,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:50,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:14:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998843685] [2022-07-13 22:14:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:50,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:14:50,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:14:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:14:50,867 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 189 [2022-07-13 22:14:50,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 175 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-07-13 22:14:50,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:50,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 189 [2022-07-13 22:14:50,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:50,921 INFO L129 PetriNetUnfolder]: 78/488 cut-off events. [2022-07-13 22:14:50,922 INFO L130 PetriNetUnfolder]: For 286/308 co-relation queries the response was YES. [2022-07-13 22:14:50,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 488 events. 78/488 cut-off events. For 286/308 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1966 event pairs, 9 based on Foata normal form. 11/480 useless extension candidates. Maximal degree in co-relation 880. Up to 106 conditions per place. [2022-07-13 22:14:50,925 INFO L132 encePairwiseOnDemand]: 186/189 looper letters, 29 selfloop transitions, 2 changer transitions 2/185 dead transitions. [2022-07-13 22:14:50,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 185 transitions, 570 flow [2022-07-13 22:14:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:14:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:14:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2022-07-13 22:14:50,926 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.908289241622575 [2022-07-13 22:14:50,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2022-07-13 22:14:50,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2022-07-13 22:14:50,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:50,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2022-07-13 22:14:50,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 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) [2022-07-13 22:14:50,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 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) [2022-07-13 22:14:50,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 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) [2022-07-13 22:14:50,929 INFO L186 Difference]: Start difference. First operand has 179 places, 175 transitions, 453 flow. Second operand 3 states and 515 transitions. [2022-07-13 22:14:50,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 185 transitions, 570 flow [2022-07-13 22:14:50,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 185 transitions, 564 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:14:50,933 INFO L242 Difference]: Finished difference. Result has 177 places, 176 transitions, 463 flow [2022-07-13 22:14:50,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2022-07-13 22:14:50,934 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 7 predicate places. [2022-07-13 22:14:50,934 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 463 flow [2022-07-13 22:14:50,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-07-13 22:14:50,935 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:50,935 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:14:50,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:14:50,935 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1086060663, now seen corresponding path program 1 times [2022-07-13 22:14:50,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746295547] [2022-07-13 22:14:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:50,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:14:50,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:50,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746295547] [2022-07-13 22:14:50,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746295547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:14:50,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:14:50,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:14:50,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996371760] [2022-07-13 22:14:50,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:14:50,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:14:50,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:50,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:14:50,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:14:50,992 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 189 [2022-07-13 22:14:50,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 463 flow. Second operand has 6 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) [2022-07-13 22:14:50,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:50,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 189 [2022-07-13 22:14:50,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:14:51,138 INFO L129 PetriNetUnfolder]: 77/620 cut-off events. [2022-07-13 22:14:51,138 INFO L130 PetriNetUnfolder]: For 367/396 co-relation queries the response was YES. [2022-07-13 22:14:51,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 620 events. 77/620 cut-off events. For 367/396 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2606 event pairs, 16 based on Foata normal form. 15/608 useless extension candidates. Maximal degree in co-relation 1125. Up to 110 conditions per place. [2022-07-13 22:14:51,142 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 38 selfloop transitions, 8 changer transitions 22/202 dead transitions. [2022-07-13 22:14:51,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 202 transitions, 685 flow [2022-07-13 22:14:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:14:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:14:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1361 transitions. [2022-07-13 22:14:51,145 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8001175778953556 [2022-07-13 22:14:51,145 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1361 transitions. [2022-07-13 22:14:51,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1361 transitions. [2022-07-13 22:14:51,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:14:51,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1361 transitions. [2022-07-13 22:14:51,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.22222222222223) internal successors, (1361), 9 states have internal predecessors, (1361), 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) [2022-07-13 22:14:51,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 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) [2022-07-13 22:14:51,150 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 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) [2022-07-13 22:14:51,151 INFO L186 Difference]: Start difference. First operand has 177 places, 176 transitions, 463 flow. Second operand 9 states and 1361 transitions. [2022-07-13 22:14:51,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 202 transitions, 685 flow [2022-07-13 22:14:51,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 202 transitions, 683 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:14:51,155 INFO L242 Difference]: Finished difference. Result has 186 places, 177 transitions, 489 flow [2022-07-13 22:14:51,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=489, PETRI_PLACES=186, PETRI_TRANSITIONS=177} [2022-07-13 22:14:51,155 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 16 predicate places. [2022-07-13 22:14:51,156 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 177 transitions, 489 flow [2022-07-13 22:14:51,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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) [2022-07-13 22:14:51,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:14:51,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:14:51,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:14:51,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:14:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:14:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash -751624308, now seen corresponding path program 1 times [2022-07-13 22:14:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:14:51,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399940669] [2022-07-13 22:14:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:14:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:14:52,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:14:52,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399940669] [2022-07-13 22:14:52,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399940669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:14:52,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361967095] [2022-07-13 22:14:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:14:52,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:14:52,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:14:52,486 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) [2022-07-13 22:14:52,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:14:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:14:52,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 22:14:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:14:53,906 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 [2022-07-13 22:14:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:14:53,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:14:54,279 INFO L356 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-07-13 22:14:54,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 49 [2022-07-13 22:14:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:14:55,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361967095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:14:55,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:14:55,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 19] total 63 [2022-07-13 22:14:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843205249] [2022-07-13 22:14:55,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:14:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-13 22:14:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:14:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-13 22:14:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=3361, Unknown=0, NotChecked=0, Total=3906 [2022-07-13 22:14:55,366 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 189 [2022-07-13 22:14:55,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 177 transitions, 489 flow. Second operand has 63 states, 63 states have (on average 59.476190476190474) internal successors, (3747), 63 states have internal predecessors, (3747), 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) [2022-07-13 22:14:55,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:14:55,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 189 [2022-07-13 22:14:55,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:15:07,531 INFO L129 PetriNetUnfolder]: 9164/17955 cut-off events. [2022-07-13 22:15:07,531 INFO L130 PetriNetUnfolder]: For 11386/11386 co-relation queries the response was YES. [2022-07-13 22:15:07,568 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45147 conditions, 17955 events. 9164/17955 cut-off events. For 11386/11386 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 165866 event pairs, 721 based on Foata normal form. 32/17327 useless extension candidates. Maximal degree in co-relation 45133. Up to 2845 conditions per place. [2022-07-13 22:15:07,635 INFO L132 encePairwiseOnDemand]: 142/189 looper letters, 825 selfloop transitions, 284 changer transitions 218/1376 dead transitions. [2022-07-13 22:15:07,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1376 transitions, 7649 flow [2022-07-13 22:15:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-07-13 22:15:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2022-07-13 22:15:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 8023 transitions. [2022-07-13 22:15:07,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3395978835978836 [2022-07-13 22:15:07,650 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 8023 transitions. [2022-07-13 22:15:07,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 8023 transitions. [2022-07-13 22:15:07,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:15:07,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 8023 transitions. [2022-07-13 22:15:07,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 64.184) internal successors, (8023), 125 states have internal predecessors, (8023), 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) [2022-07-13 22:15:07,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 189.0) internal successors, (23814), 126 states have internal predecessors, (23814), 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) [2022-07-13 22:15:07,702 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 189.0) internal successors, (23814), 126 states have internal predecessors, (23814), 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) [2022-07-13 22:15:07,702 INFO L186 Difference]: Start difference. First operand has 186 places, 177 transitions, 489 flow. Second operand 125 states and 8023 transitions. [2022-07-13 22:15:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1376 transitions, 7649 flow [2022-07-13 22:15:07,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1376 transitions, 7615 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-07-13 22:15:07,742 INFO L242 Difference]: Finished difference. Result has 371 places, 492 transitions, 3069 flow [2022-07-13 22:15:07,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=3069, PETRI_PLACES=371, PETRI_TRANSITIONS=492} [2022-07-13 22:15:07,745 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 201 predicate places. [2022-07-13 22:15:07,745 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 492 transitions, 3069 flow [2022-07-13 22:15:07,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 59.476190476190474) internal successors, (3747), 63 states have internal predecessors, (3747), 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) [2022-07-13 22:15:07,756 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:15:07,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:15:07,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:15:07,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:15:07,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:15:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:15:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1738378008, now seen corresponding path program 2 times [2022-07-13 22:15:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:15:07,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727294165] [2022-07-13 22:15:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:15:07,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:15:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:15:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:15:08,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:15:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727294165] [2022-07-13 22:15:08,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727294165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:15:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591864286] [2022-07-13 22:15:08,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:15:08,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:15:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:15:08,884 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) [2022-07-13 22:15:08,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:15:09,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:15:09,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:15:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-13 22:15:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:15:09,108 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 [2022-07-13 22:15:09,507 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 22:15:09,508 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 14 [2022-07-13 22:15:10,266 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:15:10,266 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 11 treesize of output 11 [2022-07-13 22:15:10,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:15:10,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:15:11,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:15:11,390 INFO L356 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-07-13 22:15:11,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-07-13 22:15:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:15:11,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:15:13,052 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:15:13,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 938 treesize of output 894 [2022-07-13 22:15:13,093 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:15:13,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 794 treesize of output 740 [2022-07-13 22:15:13,124 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:15:13,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 692 treesize of output 536 [2022-07-13 22:15:21,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-13 22:15:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:15:21,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591864286] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:15:21,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:15:21,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 36, 32] total 89 [2022-07-13 22:15:21,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601888341] [2022-07-13 22:15:21,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:15:21,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-13 22:15:21,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:15:21,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-13 22:15:21,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=7044, Unknown=18, NotChecked=0, Total=7832 [2022-07-13 22:15:21,316 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 189 [2022-07-13 22:15:21,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 492 transitions, 3069 flow. Second operand has 89 states, 89 states have (on average 56.449438202247194) internal successors, (5024), 89 states have internal predecessors, (5024), 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) [2022-07-13 22:15:21,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:15:21,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 189 [2022-07-13 22:15:21,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:15:40,244 INFO L129 PetriNetUnfolder]: 14333/26467 cut-off events. [2022-07-13 22:15:40,245 INFO L130 PetriNetUnfolder]: For 245732/245798 co-relation queries the response was YES. [2022-07-13 22:15:40,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122482 conditions, 26467 events. 14333/26467 cut-off events. For 245732/245798 co-relation queries the response was YES. Maximal size of possible extension queue 1262. Compared 246900 event pairs, 2578 based on Foata normal form. 26/26449 useless extension candidates. Maximal degree in co-relation 122400. Up to 14573 conditions per place. [2022-07-13 22:15:40,576 INFO L132 encePairwiseOnDemand]: 131/189 looper letters, 956 selfloop transitions, 545 changer transitions 39/1587 dead transitions. [2022-07-13 22:15:40,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1587 transitions, 14762 flow [2022-07-13 22:15:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-07-13 22:15:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2022-07-13 22:15:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 7520 transitions. [2022-07-13 22:15:40,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3084368975841844 [2022-07-13 22:15:40,594 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 7520 transitions. [2022-07-13 22:15:40,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 7520 transitions. [2022-07-13 22:15:40,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:15:40,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 7520 transitions. [2022-07-13 22:15:40,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 58.29457364341085) internal successors, (7520), 129 states have internal predecessors, (7520), 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) [2022-07-13 22:15:40,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 189.0) internal successors, (24570), 130 states have internal predecessors, (24570), 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) [2022-07-13 22:15:40,726 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 189.0) internal successors, (24570), 130 states have internal predecessors, (24570), 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) [2022-07-13 22:15:40,726 INFO L186 Difference]: Start difference. First operand has 371 places, 492 transitions, 3069 flow. Second operand 129 states and 7520 transitions. [2022-07-13 22:15:40,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1587 transitions, 14762 flow [2022-07-13 22:15:41,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1587 transitions, 13538 flow, removed 576 selfloop flow, removed 30 redundant places. [2022-07-13 22:15:41,844 INFO L242 Difference]: Finished difference. Result has 493 places, 1007 transitions, 8667 flow [2022-07-13 22:15:41,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=8667, PETRI_PLACES=493, PETRI_TRANSITIONS=1007} [2022-07-13 22:15:41,845 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 323 predicate places. [2022-07-13 22:15:41,846 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1007 transitions, 8667 flow [2022-07-13 22:15:41,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 56.449438202247194) internal successors, (5024), 89 states have internal predecessors, (5024), 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) [2022-07-13 22:15:41,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:15:41,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:15:41,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:15:42,059 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,SelfDestructingSolverStorable8 [2022-07-13 22:15:42,059 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:15:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:15:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash -620764720, now seen corresponding path program 3 times [2022-07-13 22:15:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:15:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129626434] [2022-07-13 22:15:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:15:42,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:15:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:15:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:15:43,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:15:43,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129626434] [2022-07-13 22:15:43,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129626434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:15:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323437178] [2022-07-13 22:15:43,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:15:43,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:15:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:15:43,095 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) [2022-07-13 22:15:43,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:15:43,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:15:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:15:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-13 22:15:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:15:43,212 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 [2022-07-13 22:15:43,239 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 22:15:43,239 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 14 [2022-07-13 22:15:43,557 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-13 22:15:43,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-07-13 22:15:43,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-07-13 22:15:44,271 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-13 22:15:44,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2022-07-13 22:15:44,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-07-13 22:15:44,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:15:45,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-13 22:15:45,796 INFO L356 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-07-13 22:15:45,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 26 [2022-07-13 22:15:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:15:45,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:00,041 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:00,041 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 135 treesize of output 99 [2022-07-13 22:16:00,062 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:00,062 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 1869 treesize of output 1813 [2022-07-13 22:16:00,091 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:00,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1766 treesize of output 1406 [2022-07-13 22:16:00,124 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:00,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1373 treesize of output 1211 [2022-07-13 22:16:00,173 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:00,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1179 treesize of output 1087 [2022-07-13 22:16:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:04,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323437178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:04,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:04,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 37, 37] total 95 [2022-07-13 22:16:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37646724] [2022-07-13 22:16:04,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:04,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-13 22:16:04,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:04,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-13 22:16:04,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=8099, Unknown=90, NotChecked=0, Total=8930 [2022-07-13 22:16:04,689 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 189 [2022-07-13 22:16:04,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1007 transitions, 8667 flow. Second operand has 95 states, 95 states have (on average 56.11578947368421) internal successors, (5331), 95 states have internal predecessors, (5331), 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) [2022-07-13 22:16:04,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:04,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 189 [2022-07-13 22:16:04,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:25,778 INFO L129 PetriNetUnfolder]: 20422/38461 cut-off events. [2022-07-13 22:16:25,778 INFO L130 PetriNetUnfolder]: For 564325/564410 co-relation queries the response was YES. [2022-07-13 22:16:26,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 240454 conditions, 38461 events. 20422/38461 cut-off events. For 564325/564410 co-relation queries the response was YES. Maximal size of possible extension queue 1811. Compared 382645 event pairs, 4403 based on Foata normal form. 38/38381 useless extension candidates. Maximal degree in co-relation 240349. Up to 21514 conditions per place. [2022-07-13 22:16:26,745 INFO L132 encePairwiseOnDemand]: 129/189 looper letters, 1200 selfloop transitions, 664 changer transitions 5/1916 dead transitions. [2022-07-13 22:16:26,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1916 transitions, 21862 flow [2022-07-13 22:16:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-13 22:16:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-13 22:16:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4187 transitions. [2022-07-13 22:16:26,750 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3120202697667486 [2022-07-13 22:16:26,750 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4187 transitions. [2022-07-13 22:16:26,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4187 transitions. [2022-07-13 22:16:26,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:26,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4187 transitions. [2022-07-13 22:16:26,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 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) [2022-07-13 22:16:26,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 189.0) internal successors, (13608), 72 states have internal predecessors, (13608), 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) [2022-07-13 22:16:26,764 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 189.0) internal successors, (13608), 72 states have internal predecessors, (13608), 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) [2022-07-13 22:16:26,764 INFO L186 Difference]: Start difference. First operand has 493 places, 1007 transitions, 8667 flow. Second operand 71 states and 4187 transitions. [2022-07-13 22:16:26,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1916 transitions, 21862 flow [2022-07-13 22:16:30,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1916 transitions, 20816 flow, removed 467 selfloop flow, removed 49 redundant places. [2022-07-13 22:16:30,723 INFO L242 Difference]: Finished difference. Result has 533 places, 1475 transitions, 15347 flow [2022-07-13 22:16:30,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=8011, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=15347, PETRI_PLACES=533, PETRI_TRANSITIONS=1475} [2022-07-13 22:16:30,724 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 363 predicate places. [2022-07-13 22:16:30,725 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1475 transitions, 15347 flow [2022-07-13 22:16:30,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 56.11578947368421) internal successors, (5331), 95 states have internal predecessors, (5331), 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) [2022-07-13 22:16:30,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:30,726 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:16:30,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:30,945 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 [2022-07-13 22:16:30,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash 27667196, now seen corresponding path program 4 times [2022-07-13 22:16:30,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:30,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960189613] [2022-07-13 22:16:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:32,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960189613] [2022-07-13 22:16:32,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960189613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279176705] [2022-07-13 22:16:32,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:16:32,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:32,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:32,687 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) [2022-07-13 22:16:32,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:16:32,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:16:32,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:32,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 22:16:32,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:33,813 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 11 treesize of output 7 [2022-07-13 22:16:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:16:34,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:16:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:16:34,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:16:34,781 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:16:34,782 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 34 treesize of output 10 [2022-07-13 22:16:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:34,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:36,481 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:36,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 79 [2022-07-13 22:16:36,512 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:36,512 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 547 treesize of output 535 [2022-07-13 22:16:36,544 INFO L356 Elim1Store]: treesize reduction 44, result has 54.6 percent of original size [2022-07-13 22:16:36,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 755 treesize of output 768 [2022-07-13 22:16:36,578 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:36,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 756 treesize of output 738 [2022-07-13 22:16:36,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:36,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 690 treesize of output 606 [2022-07-13 22:16:44,524 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:16:44,525 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 107 treesize of output 1 [2022-07-13 22:16:44,574 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:16:44,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 94 [2022-07-13 22:16:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:46,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279176705] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:46,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:46,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 31, 29] total 87 [2022-07-13 22:16:46,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241442976] [2022-07-13 22:16:46,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-13 22:16:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-13 22:16:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=6888, Unknown=25, NotChecked=0, Total=7482 [2022-07-13 22:16:46,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 189 [2022-07-13 22:16:46,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1475 transitions, 15347 flow. Second operand has 87 states, 87 states have (on average 59.49425287356322) internal successors, (5176), 87 states have internal predecessors, (5176), 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) [2022-07-13 22:16:46,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:46,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 189 [2022-07-13 22:16:46,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:22,385 INFO L129 PetriNetUnfolder]: 33998/63618 cut-off events. [2022-07-13 22:17:22,386 INFO L130 PetriNetUnfolder]: For 1576163/1576348 co-relation queries the response was YES. [2022-07-13 22:17:24,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 484027 conditions, 63618 events. 33998/63618 cut-off events. For 1576163/1576348 co-relation queries the response was YES. Maximal size of possible extension queue 3126. Compared 673015 event pairs, 5318 based on Foata normal form. 84/63469 useless extension candidates. Maximal degree in co-relation 483907. Up to 22483 conditions per place. [2022-07-13 22:17:24,524 INFO L132 encePairwiseOnDemand]: 121/189 looper letters, 1324 selfloop transitions, 1783 changer transitions 33/3190 dead transitions. [2022-07-13 22:17:24,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 3190 transitions, 41307 flow [2022-07-13 22:17:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-07-13 22:17:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2022-07-13 22:17:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 8013 transitions. [2022-07-13 22:17:24,535 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3236398885253847 [2022-07-13 22:17:24,535 INFO L72 ComplementDD]: Start complementDD. Operand 131 states and 8013 transitions. [2022-07-13 22:17:24,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 131 states and 8013 transitions. [2022-07-13 22:17:24,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:24,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 131 states and 8013 transitions. [2022-07-13 22:17:24,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 132 states, 131 states have (on average 61.16793893129771) internal successors, (8013), 131 states have internal predecessors, (8013), 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) [2022-07-13 22:17:24,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 132 states, 132 states have (on average 189.0) internal successors, (24948), 132 states have internal predecessors, (24948), 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) [2022-07-13 22:17:24,566 INFO L81 ComplementDD]: Finished complementDD. Result has 132 states, 132 states have (on average 189.0) internal successors, (24948), 132 states have internal predecessors, (24948), 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) [2022-07-13 22:17:24,566 INFO L186 Difference]: Start difference. First operand has 533 places, 1475 transitions, 15347 flow. Second operand 131 states and 8013 transitions. [2022-07-13 22:17:24,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 3190 transitions, 41307 flow [2022-07-13 22:17:34,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 3190 transitions, 40563 flow, removed 292 selfloop flow, removed 37 redundant places. [2022-07-13 22:17:34,730 INFO L242 Difference]: Finished difference. Result has 668 places, 2506 transitions, 33776 flow [2022-07-13 22:17:34,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=14936, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=33776, PETRI_PLACES=668, PETRI_TRANSITIONS=2506} [2022-07-13 22:17:34,732 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 498 predicate places. [2022-07-13 22:17:34,732 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 2506 transitions, 33776 flow [2022-07-13 22:17:34,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 59.49425287356322) internal successors, (5176), 87 states have internal predecessors, (5176), 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) [2022-07-13 22:17:34,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:34,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:17:34,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 22:17:34,935 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 [2022-07-13 22:17:34,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1966900354, now seen corresponding path program 5 times [2022-07-13 22:17:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:34,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598149510] [2022-07-13 22:17:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598149510] [2022-07-13 22:17:36,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598149510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868948752] [2022-07-13 22:17:36,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:17:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:36,497 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) [2022-07-13 22:17:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:17:36,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:17:36,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-13 22:17:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:37,909 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 11 treesize of output 7 [2022-07-13 22:17:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:17:38,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:17:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:17:38,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:17:39,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:17:39,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:17:39,181 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-07-13 22:17:39,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 13 [2022-07-13 22:17:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:39,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:41,216 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:41,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 79 [2022-07-13 22:17:41,224 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:41,224 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 547 treesize of output 535 [2022-07-13 22:17:41,256 INFO L356 Elim1Store]: treesize reduction 44, result has 54.6 percent of original size [2022-07-13 22:17:41,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 755 treesize of output 768 [2022-07-13 22:17:41,280 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:41,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 756 treesize of output 672 [2022-07-13 22:17:41,301 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:41,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 624 treesize of output 606 [2022-07-13 22:17:59,514 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:59,514 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 141 treesize of output 139 [2022-07-13 22:17:59,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 10 [2022-07-13 22:17:59,927 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:17:59,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 93 [2022-07-13 22:18:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:01,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868948752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:01,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:01,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 29] total 91 [2022-07-13 22:18:01,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620953275] [2022-07-13 22:18:01,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:01,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-13 22:18:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-13 22:18:01,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=7315, Unknown=39, NotChecked=0, Total=8190 [2022-07-13 22:18:01,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 189 [2022-07-13 22:18:01,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 2506 transitions, 33776 flow. Second operand has 91 states, 91 states have (on average 59.34065934065934) internal successors, (5400), 91 states have internal predecessors, (5400), 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) [2022-07-13 22:18:01,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:01,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 189 [2022-07-13 22:18:01,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand