./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-cond-3.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 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:44:04,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:44:04,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:44:04,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:44:04,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:44:04,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:44:04,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:44:04,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:44:04,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:44:04,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:44:04,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:44:04,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:44:04,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:44:04,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:44:04,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:44:04,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:44:04,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:44:04,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:44:04,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:44:04,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:44:04,373 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:44:04,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:44:04,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:44:04,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:44:04,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:44:04,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:44:04,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:44:04,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:44:04,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:44:04,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:44:04,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:44:04,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:44:04,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:44:04,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:44:04,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:44:04,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:44:04,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:44:04,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:44:04,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:44:04,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:44:04,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:44:04,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:44:04,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:44:04,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:44:04,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:44:04,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:44:04,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:44:04,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:44:04,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:44:04,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:44:04,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:44:04,411 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:44:04,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:44:04,412 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:44:04,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:44:04,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:44:04,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:44:04,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:44:04,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:44:04,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:44:04,413 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:44:04,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:44:04,413 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:44:04,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:44:04,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:44:04,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:44:04,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:44:04,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:44:04,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:44:04,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:44:04,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:44:04,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:44:04,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:44:04,415 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:44:04,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:44:04,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:44:04,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade [2022-07-12 10:44:04,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:44:04,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:44:04,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:44:04,594 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:44:04,594 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:44:04,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2022-07-12 10:44:04,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76d564063/0c97084b54aa49888f217d0e42003853/FLAG9ffb230ea [2022-07-12 10:44:05,010 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:44:05,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2022-07-12 10:44:05,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76d564063/0c97084b54aa49888f217d0e42003853/FLAG9ffb230ea [2022-07-12 10:44:05,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76d564063/0c97084b54aa49888f217d0e42003853 [2022-07-12 10:44:05,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:44:05,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:44:05,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:44:05,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:44:05,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:44:05,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798095c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05, skipping insertion in model container [2022-07-12 10:44:05,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:44:05,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:44:05,631 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2641,2654] [2022-07-12 10:44:05,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:44:05,641 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:44:05,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2641,2654] [2022-07-12 10:44:05,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:44:05,665 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:44:05,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05 WrapperNode [2022-07-12 10:44:05,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:44:05,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:44:05,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:44:05,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:44:05,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,690 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 162 [2022-07-12 10:44:05,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:44:05,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:44:05,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:44:05,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:44:05,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:44:05,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:44:05,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:44:05,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:44:05,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (1/1) ... [2022-07-12 10:44:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:44:05,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:05,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:44:05,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:44:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:44:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:44:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:44:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:44:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:44:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:44:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:44:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:44:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:44:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:44:05,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:44:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:44:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:44:05,790 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:44:05,890 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:44:05,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:44:06,120 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:44:06,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:44:06,129 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:44:06,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:44:06 BoogieIcfgContainer [2022-07-12 10:44:06,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:44:06,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:44:06,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:44:06,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:44:06,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:44:05" (1/3) ... [2022-07-12 10:44:06,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49990229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:44:06, skipping insertion in model container [2022-07-12 10:44:06,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:44:05" (2/3) ... [2022-07-12 10:44:06,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49990229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:44:06, skipping insertion in model container [2022-07-12 10:44:06,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:44:06" (3/3) ... [2022-07-12 10:44:06,145 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2022-07-12 10:44:06,148 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:44:06,154 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:44:06,154 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:44:06,155 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:44:06,236 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:44:06,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 209 transitions, 434 flow [2022-07-12 10:44:06,347 INFO L129 PetriNetUnfolder]: 18/207 cut-off events. [2022-07-12 10:44:06,347 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:44:06,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 207 events. 18/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 317 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-07-12 10:44:06,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 209 transitions, 434 flow [2022-07-12 10:44:06,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 198 transitions, 408 flow [2022-07-12 10:44:06,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:44:06,376 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@6c6cc342, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34a24679 [2022-07-12 10:44:06,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:44:06,412 INFO L129 PetriNetUnfolder]: 16/181 cut-off events. [2022-07-12 10:44:06,412 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:44:06,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:06,413 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] [2022-07-12 10:44:06,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash -652717319, now seen corresponding path program 1 times [2022-07-12 10:44:06,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:06,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110549017] [2022-07-12 10:44:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:06,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:06,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110549017] [2022-07-12 10:44:06,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110549017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:06,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:06,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:44:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179038790] [2022-07-12 10:44:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:06,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:44:06,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:44:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:44:06,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 209 [2022-07-12 10:44:06,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 198 transitions, 408 flow. Second operand has 2 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:06,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:06,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 209 [2022-07-12 10:44:06,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:06,644 INFO L129 PetriNetUnfolder]: 5/185 cut-off events. [2022-07-12 10:44:06,644 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:44:06,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 185 events. 5/185 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 283 event pairs, 0 based on Foata normal form. 16/186 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-07-12 10:44:06,647 INFO L132 encePairwiseOnDemand]: 196/209 looper letters, 4 selfloop transitions, 0 changer transitions 4/185 dead transitions. [2022-07-12 10:44:06,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 185 transitions, 390 flow [2022-07-12 10:44:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:44:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:44:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 399 transitions. [2022-07-12 10:44:06,661 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9545454545454546 [2022-07-12 10:44:06,662 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 399 transitions. [2022-07-12 10:44:06,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 399 transitions. [2022-07-12 10:44:06,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:06,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 399 transitions. [2022-07-12 10:44:06,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 199.5) internal successors, (399), 2 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:06,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:06,675 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:06,676 INFO L186 Difference]: Start difference. First operand has 187 places, 198 transitions, 408 flow. Second operand 2 states and 399 transitions. [2022-07-12 10:44:06,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 185 transitions, 390 flow [2022-07-12 10:44:06,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 185 transitions, 382 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:44:06,683 INFO L242 Difference]: Finished difference. Result has 184 places, 181 transitions, 366 flow [2022-07-12 10:44:06,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=366, PETRI_PLACES=184, PETRI_TRANSITIONS=181} [2022-07-12 10:44:06,687 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -3 predicate places. [2022-07-12 10:44:06,687 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 181 transitions, 366 flow [2022-07-12 10:44:06,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:06,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:06,688 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] [2022-07-12 10:44:06,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:44:06,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1212347192, now seen corresponding path program 1 times [2022-07-12 10:44:06,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988779482] [2022-07-12 10:44:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:06,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988779482] [2022-07-12 10:44:06,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988779482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:06,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:06,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:44:06,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966291254] [2022-07-12 10:44:06,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:06,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:44:06,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:06,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:44:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:44:06,945 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 209 [2022-07-12 10:44:06,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 181 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:06,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:06,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 209 [2022-07-12 10:44:06,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:07,068 INFO L129 PetriNetUnfolder]: 158/765 cut-off events. [2022-07-12 10:44:07,068 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-12 10:44:07,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 765 events. 158/765 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3811 event pairs, 36 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 1036. Up to 169 conditions per place. [2022-07-12 10:44:07,073 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 39 selfloop transitions, 7 changer transitions 0/202 dead transitions. [2022-07-12 10:44:07,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 202 transitions, 502 flow [2022-07-12 10:44:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:44:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:44:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 727 transitions. [2022-07-12 10:44:07,076 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8696172248803827 [2022-07-12 10:44:07,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 727 transitions. [2022-07-12 10:44:07,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 727 transitions. [2022-07-12 10:44:07,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:07,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 727 transitions. [2022-07-12 10:44:07,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,081 INFO L186 Difference]: Start difference. First operand has 184 places, 181 transitions, 366 flow. Second operand 4 states and 727 transitions. [2022-07-12 10:44:07,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 202 transitions, 502 flow [2022-07-12 10:44:07,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 202 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:44:07,087 INFO L242 Difference]: Finished difference. Result has 185 places, 187 transitions, 413 flow [2022-07-12 10:44:07,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=413, PETRI_PLACES=185, PETRI_TRANSITIONS=187} [2022-07-12 10:44:07,088 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -2 predicate places. [2022-07-12 10:44:07,088 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 187 transitions, 413 flow [2022-07-12 10:44:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,089 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:07,089 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] [2022-07-12 10:44:07,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:44:07,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash -123130560, now seen corresponding path program 1 times [2022-07-12 10:44:07,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:07,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706296960] [2022-07-12 10:44:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706296960] [2022-07-12 10:44:07,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706296960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:07,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:07,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:44:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357417925] [2022-07-12 10:44:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:44:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:44:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:44:07,220 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-12 10:44:07,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 187 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:07,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-12 10:44:07,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:07,494 INFO L129 PetriNetUnfolder]: 366/1796 cut-off events. [2022-07-12 10:44:07,495 INFO L130 PetriNetUnfolder]: For 193/195 co-relation queries the response was YES. [2022-07-12 10:44:07,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 1796 events. 366/1796 cut-off events. For 193/195 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13113 event pairs, 130 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 2731. Up to 371 conditions per place. [2022-07-12 10:44:07,503 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 83 selfloop transitions, 7 changer transitions 0/243 dead transitions. [2022-07-12 10:44:07,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 243 transitions, 774 flow [2022-07-12 10:44:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:44:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:44:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1077 transitions. [2022-07-12 10:44:07,506 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8588516746411483 [2022-07-12 10:44:07,506 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1077 transitions. [2022-07-12 10:44:07,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1077 transitions. [2022-07-12 10:44:07,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:07,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1077 transitions. [2022-07-12 10:44:07,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.5) internal successors, (1077), 6 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,511 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,511 INFO L186 Difference]: Start difference. First operand has 185 places, 187 transitions, 413 flow. Second operand 6 states and 1077 transitions. [2022-07-12 10:44:07,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 243 transitions, 774 flow [2022-07-12 10:44:07,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 243 transitions, 774 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:44:07,518 INFO L242 Difference]: Finished difference. Result has 193 places, 191 transitions, 459 flow [2022-07-12 10:44:07,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=193, PETRI_TRANSITIONS=191} [2022-07-12 10:44:07,520 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 6 predicate places. [2022-07-12 10:44:07,520 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 191 transitions, 459 flow [2022-07-12 10:44:07,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,520 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:07,521 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] [2022-07-12 10:44:07,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:44:07,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:07,522 INFO L85 PathProgramCache]: Analyzing trace with hash 749567470, now seen corresponding path program 2 times [2022-07-12 10:44:07,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:07,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576123323] [2022-07-12 10:44:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:07,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:07,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:07,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576123323] [2022-07-12 10:44:07,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576123323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:07,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:07,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:44:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898082741] [2022-07-12 10:44:07,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:07,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:44:07,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:44:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:44:07,663 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-12 10:44:07,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 191 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:07,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-12 10:44:07,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:07,960 INFO L129 PetriNetUnfolder]: 407/2024 cut-off events. [2022-07-12 10:44:07,960 INFO L130 PetriNetUnfolder]: For 546/548 co-relation queries the response was YES. [2022-07-12 10:44:07,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3326 conditions, 2024 events. 407/2024 cut-off events. For 546/548 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 15253 event pairs, 184 based on Foata normal form. 10/1900 useless extension candidates. Maximal degree in co-relation 3316. Up to 407 conditions per place. [2022-07-12 10:44:07,969 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 71 selfloop transitions, 13 changer transitions 0/237 dead transitions. [2022-07-12 10:44:07,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 237 transitions, 791 flow [2022-07-12 10:44:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:44:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:44:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1244 transitions. [2022-07-12 10:44:07,971 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8503075871496925 [2022-07-12 10:44:07,971 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1244 transitions. [2022-07-12 10:44:07,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1244 transitions. [2022-07-12 10:44:07,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:07,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1244 transitions. [2022-07-12 10:44:07,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.71428571428572) internal successors, (1244), 7 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,979 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,979 INFO L186 Difference]: Start difference. First operand has 193 places, 191 transitions, 459 flow. Second operand 7 states and 1244 transitions. [2022-07-12 10:44:07,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 237 transitions, 791 flow [2022-07-12 10:44:07,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 237 transitions, 765 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-12 10:44:07,987 INFO L242 Difference]: Finished difference. Result has 202 places, 196 transitions, 534 flow [2022-07-12 10:44:07,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=202, PETRI_TRANSITIONS=196} [2022-07-12 10:44:07,989 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 15 predicate places. [2022-07-12 10:44:07,989 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 196 transitions, 534 flow [2022-07-12 10:44:07,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:07,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:07,993 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] [2022-07-12 10:44:07,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:44:07,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1940410436, now seen corresponding path program 3 times [2022-07-12 10:44:07,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535454453] [2022-07-12 10:44:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:07,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:08,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535454453] [2022-07-12 10:44:08,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535454453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:08,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:08,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:44:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881249629] [2022-07-12 10:44:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:08,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:44:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:44:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:44:08,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-12 10:44:08,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 196 transitions, 534 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:08,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-12 10:44:08,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:08,342 INFO L129 PetriNetUnfolder]: 440/2219 cut-off events. [2022-07-12 10:44:08,343 INFO L130 PetriNetUnfolder]: For 1416/1428 co-relation queries the response was YES. [2022-07-12 10:44:08,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 2219 events. 440/2219 cut-off events. For 1416/1428 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17120 event pairs, 226 based on Foata normal form. 3/2051 useless extension candidates. Maximal degree in co-relation 3931. Up to 404 conditions per place. [2022-07-12 10:44:08,353 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 77 selfloop transitions, 16 changer transitions 0/246 dead transitions. [2022-07-12 10:44:08,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 246 transitions, 960 flow [2022-07-12 10:44:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:44:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:44:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2022-07-12 10:44:08,356 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8679425837320575 [2022-07-12 10:44:08,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2022-07-12 10:44:08,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2022-07-12 10:44:08,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:08,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2022-07-12 10:44:08,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,359 INFO L186 Difference]: Start difference. First operand has 202 places, 196 transitions, 534 flow. Second operand 5 states and 907 transitions. [2022-07-12 10:44:08,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 246 transitions, 960 flow [2022-07-12 10:44:08,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 246 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:44:08,365 INFO L242 Difference]: Finished difference. Result has 208 places, 204 transitions, 672 flow [2022-07-12 10:44:08,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=672, PETRI_PLACES=208, PETRI_TRANSITIONS=204} [2022-07-12 10:44:08,365 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 21 predicate places. [2022-07-12 10:44:08,366 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 204 transitions, 672 flow [2022-07-12 10:44:08,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:08,366 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] [2022-07-12 10:44:08,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:44:08,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash 336336672, now seen corresponding path program 4 times [2022-07-12 10:44:08,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:08,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390526558] [2022-07-12 10:44:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:08,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390526558] [2022-07-12 10:44:08,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390526558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:08,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:08,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:44:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697366170] [2022-07-12 10:44:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:08,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:44:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:44:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:44:08,551 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-12 10:44:08,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 204 transitions, 672 flow. Second operand has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:08,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-12 10:44:08,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:08,809 INFO L129 PetriNetUnfolder]: 449/2274 cut-off events. [2022-07-12 10:44:08,809 INFO L130 PetriNetUnfolder]: For 2385/2397 co-relation queries the response was YES. [2022-07-12 10:44:08,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 2274 events. 449/2274 cut-off events. For 2385/2397 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 17766 event pairs, 232 based on Foata normal form. 9/2109 useless extension candidates. Maximal degree in co-relation 4241. Up to 409 conditions per place. [2022-07-12 10:44:08,819 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 78 selfloop transitions, 18 changer transitions 0/249 dead transitions. [2022-07-12 10:44:08,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 249 transitions, 1056 flow [2022-07-12 10:44:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:44:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:44:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1078 transitions. [2022-07-12 10:44:08,821 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8596491228070176 [2022-07-12 10:44:08,822 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1078 transitions. [2022-07-12 10:44:08,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1078 transitions. [2022-07-12 10:44:08,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:08,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1078 transitions. [2022-07-12 10:44:08,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.66666666666666) internal successors, (1078), 6 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,825 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,825 INFO L186 Difference]: Start difference. First operand has 208 places, 204 transitions, 672 flow. Second operand 6 states and 1078 transitions. [2022-07-12 10:44:08,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 249 transitions, 1056 flow [2022-07-12 10:44:08,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 249 transitions, 1029 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-12 10:44:08,832 INFO L242 Difference]: Finished difference. Result has 215 places, 207 transitions, 737 flow [2022-07-12 10:44:08,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=737, PETRI_PLACES=215, PETRI_TRANSITIONS=207} [2022-07-12 10:44:08,833 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 28 predicate places. [2022-07-12 10:44:08,833 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 207 transitions, 737 flow [2022-07-12 10:44:08,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,833 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:08,833 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] [2022-07-12 10:44:08,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:44:08,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash -347218618, now seen corresponding path program 5 times [2022-07-12 10:44:08,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:08,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747850482] [2022-07-12 10:44:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:08,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747850482] [2022-07-12 10:44:08,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747850482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:08,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:08,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:44:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039850282] [2022-07-12 10:44:08,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:08,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:44:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:44:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:44:08,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-12 10:44:08,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 207 transitions, 737 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:08,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:08,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-12 10:44:08,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:09,175 INFO L129 PetriNetUnfolder]: 447/2234 cut-off events. [2022-07-12 10:44:09,175 INFO L130 PetriNetUnfolder]: For 2688/2690 co-relation queries the response was YES. [2022-07-12 10:44:09,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4299 conditions, 2234 events. 447/2234 cut-off events. For 2688/2690 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 17350 event pairs, 243 based on Foata normal form. 4/2064 useless extension candidates. Maximal degree in co-relation 4278. Up to 584 conditions per place. [2022-07-12 10:44:09,188 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 63 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2022-07-12 10:44:09,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 238 transitions, 1084 flow [2022-07-12 10:44:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:44:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:44:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2022-07-12 10:44:09,190 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8564593301435407 [2022-07-12 10:44:09,190 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2022-07-12 10:44:09,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2022-07-12 10:44:09,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:09,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2022-07-12 10:44:09,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,194 INFO L186 Difference]: Start difference. First operand has 215 places, 207 transitions, 737 flow. Second operand 5 states and 895 transitions. [2022-07-12 10:44:09,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 238 transitions, 1084 flow [2022-07-12 10:44:09,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 238 transitions, 1053 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-12 10:44:09,201 INFO L242 Difference]: Finished difference. Result has 220 places, 215 transitions, 880 flow [2022-07-12 10:44:09,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=880, PETRI_PLACES=220, PETRI_TRANSITIONS=215} [2022-07-12 10:44:09,202 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 33 predicate places. [2022-07-12 10:44:09,202 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 215 transitions, 880 flow [2022-07-12 10:44:09,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:09,202 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] [2022-07-12 10:44:09,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:44:09,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash -780781578, now seen corresponding path program 6 times [2022-07-12 10:44:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747191073] [2022-07-12 10:44:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:09,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747191073] [2022-07-12 10:44:09,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747191073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:09,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:44:09,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:44:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292128134] [2022-07-12 10:44:09,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:44:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:44:09,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:44:09,323 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-12 10:44:09,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 215 transitions, 880 flow. Second operand has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:09,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-12 10:44:09,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:09,555 INFO L129 PetriNetUnfolder]: 431/2167 cut-off events. [2022-07-12 10:44:09,555 INFO L130 PetriNetUnfolder]: For 3157/3159 co-relation queries the response was YES. [2022-07-12 10:44:09,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 2167 events. 431/2167 cut-off events. For 3157/3159 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 16633 event pairs, 215 based on Foata normal form. 10/2014 useless extension candidates. Maximal degree in co-relation 4213. Up to 538 conditions per place. [2022-07-12 10:44:09,587 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 68 selfloop transitions, 24 changer transitions 0/245 dead transitions. [2022-07-12 10:44:09,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 245 transitions, 1176 flow [2022-07-12 10:44:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:44:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:44:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1070 transitions. [2022-07-12 10:44:09,590 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8532695374800638 [2022-07-12 10:44:09,590 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1070 transitions. [2022-07-12 10:44:09,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1070 transitions. [2022-07-12 10:44:09,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:09,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1070 transitions. [2022-07-12 10:44:09,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,594 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,594 INFO L186 Difference]: Start difference. First operand has 220 places, 215 transitions, 880 flow. Second operand 6 states and 1070 transitions. [2022-07-12 10:44:09,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 245 transitions, 1176 flow [2022-07-12 10:44:09,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 245 transitions, 1136 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-12 10:44:09,602 INFO L242 Difference]: Finished difference. Result has 227 places, 218 transitions, 954 flow [2022-07-12 10:44:09,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=954, PETRI_PLACES=227, PETRI_TRANSITIONS=218} [2022-07-12 10:44:09,603 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 40 predicate places. [2022-07-12 10:44:09,603 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 218 transitions, 954 flow [2022-07-12 10:44:09,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:09,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:09,604 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] [2022-07-12 10:44:09,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:44:09,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash -894123993, now seen corresponding path program 1 times [2022-07-12 10:44:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:09,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127399998] [2022-07-12 10:44:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:09,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127399998] [2022-07-12 10:44:09,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127399998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143883330] [2022-07-12 10:44:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:09,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:09,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:09,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:44:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 10:44:09,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:10,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 10:44:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:10,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:44:10,434 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-12 10:44:10,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 10:44:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:10,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143883330] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:44:10,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:44:10,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 9] total 23 [2022-07-12 10:44:10,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133641373] [2022-07-12 10:44:10,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:44:10,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:44:10,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:44:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:44:10,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 209 [2022-07-12 10:44:10,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 218 transitions, 954 flow. Second operand has 23 states, 23 states have (on average 113.21739130434783) internal successors, (2604), 23 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:10,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:10,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 209 [2022-07-12 10:44:10,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:13,958 INFO L129 PetriNetUnfolder]: 7216/16942 cut-off events. [2022-07-12 10:44:13,958 INFO L130 PetriNetUnfolder]: For 21628/21628 co-relation queries the response was YES. [2022-07-12 10:44:14,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36786 conditions, 16942 events. 7216/16942 cut-off events. For 21628/21628 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 158233 event pairs, 476 based on Foata normal form. 33/16109 useless extension candidates. Maximal degree in co-relation 36759. Up to 3162 conditions per place. [2022-07-12 10:44:14,101 INFO L132 encePairwiseOnDemand]: 177/209 looper letters, 673 selfloop transitions, 139 changer transitions 8/916 dead transitions. [2022-07-12 10:44:14,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 916 transitions, 5579 flow [2022-07-12 10:44:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 10:44:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-12 10:44:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6235 transitions. [2022-07-12 10:44:14,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5737026131762973 [2022-07-12 10:44:14,111 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6235 transitions. [2022-07-12 10:44:14,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6235 transitions. [2022-07-12 10:44:14,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:14,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6235 transitions. [2022-07-12 10:44:14,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 119.90384615384616) internal successors, (6235), 52 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:14,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 209.0) internal successors, (11077), 53 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:14,143 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 209.0) internal successors, (11077), 53 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:14,143 INFO L186 Difference]: Start difference. First operand has 227 places, 218 transitions, 954 flow. Second operand 52 states and 6235 transitions. [2022-07-12 10:44:14,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 916 transitions, 5579 flow [2022-07-12 10:44:14,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 916 transitions, 5384 flow, removed 29 selfloop flow, removed 2 redundant places. [2022-07-12 10:44:14,190 INFO L242 Difference]: Finished difference. Result has 307 places, 361 transitions, 2051 flow [2022-07-12 10:44:14,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2051, PETRI_PLACES=307, PETRI_TRANSITIONS=361} [2022-07-12 10:44:14,191 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 120 predicate places. [2022-07-12 10:44:14,192 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 361 transitions, 2051 flow [2022-07-12 10:44:14,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 113.21739130434783) internal successors, (2604), 23 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:14,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:14,193 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] [2022-07-12 10:44:14,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:44:14,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:14,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1707261297, now seen corresponding path program 2 times [2022-07-12 10:44:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:14,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066281373] [2022-07-12 10:44:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:14,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066281373] [2022-07-12 10:44:14,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066281373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287964447] [2022-07-12 10:44:14,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:44:14,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:14,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:14,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:14,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:44:14,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:44:14,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:44:14,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:44:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:14,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:44:14,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287964447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:14,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:44:14,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-12 10:44:14,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981729081] [2022-07-12 10:44:14,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:14,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:44:14,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:14,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:44:14,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:44:14,750 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 209 [2022-07-12 10:44:14,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 361 transitions, 2051 flow. Second operand has 8 states, 8 states have (on average 156.75) internal successors, (1254), 8 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:14,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:14,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 209 [2022-07-12 10:44:14,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:15,335 INFO L129 PetriNetUnfolder]: 504/4014 cut-off events. [2022-07-12 10:44:15,335 INFO L130 PetriNetUnfolder]: For 7289/7320 co-relation queries the response was YES. [2022-07-12 10:44:15,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8228 conditions, 4014 events. 504/4014 cut-off events. For 7289/7320 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 38744 event pairs, 130 based on Foata normal form. 5/3738 useless extension candidates. Maximal degree in co-relation 8170. Up to 388 conditions per place. [2022-07-12 10:44:15,402 INFO L132 encePairwiseOnDemand]: 197/209 looper letters, 31 selfloop transitions, 11 changer transitions 0/365 dead transitions. [2022-07-12 10:44:15,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 365 transitions, 2143 flow [2022-07-12 10:44:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:44:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:44:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1726 transitions. [2022-07-12 10:44:15,405 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750761200521966 [2022-07-12 10:44:15,405 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1726 transitions. [2022-07-12 10:44:15,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1726 transitions. [2022-07-12 10:44:15,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:15,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1726 transitions. [2022-07-12 10:44:15,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 156.9090909090909) internal successors, (1726), 11 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:15,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 209.0) internal successors, (2508), 12 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:15,411 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 209.0) internal successors, (2508), 12 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:15,411 INFO L186 Difference]: Start difference. First operand has 307 places, 361 transitions, 2051 flow. Second operand 11 states and 1726 transitions. [2022-07-12 10:44:15,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 365 transitions, 2143 flow [2022-07-12 10:44:15,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 365 transitions, 2048 flow, removed 22 selfloop flow, removed 10 redundant places. [2022-07-12 10:44:15,440 INFO L242 Difference]: Finished difference. Result has 306 places, 362 transitions, 1986 flow [2022-07-12 10:44:15,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1986, PETRI_PLACES=306, PETRI_TRANSITIONS=362} [2022-07-12 10:44:15,441 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 119 predicate places. [2022-07-12 10:44:15,441 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 362 transitions, 1986 flow [2022-07-12 10:44:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.75) internal successors, (1254), 8 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:15,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:15,441 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] [2022-07-12 10:44:15,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:44:15,655 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,SelfDestructingSolverStorable9 [2022-07-12 10:44:15,656 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1707571491, now seen corresponding path program 1 times [2022-07-12 10:44:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:15,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149980262] [2022-07-12 10:44:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:15,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:15,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:15,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149980262] [2022-07-12 10:44:15,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149980262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:15,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753064246] [2022-07-12 10:44:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:15,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:15,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:15,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:44:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 10:44:15,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:16,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 10:44:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:16,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:44:16,301 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-12 10:44:16,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 10:44:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:16,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753064246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:44:16,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:44:16,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 9] total 22 [2022-07-12 10:44:16,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54868481] [2022-07-12 10:44:16,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:44:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 10:44:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 10:44:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:44:16,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 209 [2022-07-12 10:44:16,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 362 transitions, 1986 flow. Second operand has 22 states, 22 states have (on average 113.31818181818181) internal successors, (2493), 22 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:16,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:16,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 209 [2022-07-12 10:44:16,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:20,061 INFO L129 PetriNetUnfolder]: 8412/19466 cut-off events. [2022-07-12 10:44:20,061 INFO L130 PetriNetUnfolder]: For 50835/50931 co-relation queries the response was YES. [2022-07-12 10:44:20,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55259 conditions, 19466 events. 8412/19466 cut-off events. For 50835/50931 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 184360 event pairs, 2047 based on Foata normal form. 71/18756 useless extension candidates. Maximal degree in co-relation 55202. Up to 7605 conditions per place. [2022-07-12 10:44:20,193 INFO L132 encePairwiseOnDemand]: 178/209 looper letters, 587 selfloop transitions, 207 changer transitions 4/895 dead transitions. [2022-07-12 10:44:20,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 895 transitions, 6766 flow [2022-07-12 10:44:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 10:44:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-12 10:44:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 7014 transitions. [2022-07-12 10:44:20,200 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.550160796925249 [2022-07-12 10:44:20,200 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 7014 transitions. [2022-07-12 10:44:20,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 7014 transitions. [2022-07-12 10:44:20,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:20,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 7014 transitions. [2022-07-12 10:44:20,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 114.98360655737704) internal successors, (7014), 61 states have internal predecessors, (7014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:20,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 209.0) internal successors, (12958), 62 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:20,221 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 209.0) internal successors, (12958), 62 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:20,221 INFO L186 Difference]: Start difference. First operand has 306 places, 362 transitions, 1986 flow. Second operand 61 states and 7014 transitions. [2022-07-12 10:44:20,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 895 transitions, 6766 flow [2022-07-12 10:44:20,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 895 transitions, 6746 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-12 10:44:20,375 INFO L242 Difference]: Finished difference. Result has 388 places, 524 transitions, 4361 flow [2022-07-12 10:44:20,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4361, PETRI_PLACES=388, PETRI_TRANSITIONS=524} [2022-07-12 10:44:20,376 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 201 predicate places. [2022-07-12 10:44:20,376 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 524 transitions, 4361 flow [2022-07-12 10:44:20,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 113.31818181818181) internal successors, (2493), 22 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:20,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:20,377 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] [2022-07-12 10:44:20,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:44:20,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:20,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:20,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2081660607, now seen corresponding path program 2 times [2022-07-12 10:44:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:20,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071986241] [2022-07-12 10:44:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:20,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071986241] [2022-07-12 10:44:20,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071986241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:20,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625104720] [2022-07-12 10:44:20,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:44:20,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:20,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:20,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:44:20,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:44:20,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:44:20,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:44:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:44:20,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:44:20,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625104720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:44:20,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:44:20,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-07-12 10:44:20,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707499909] [2022-07-12 10:44:20,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:44:20,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:44:20,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:44:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:44:20,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 209 [2022-07-12 10:44:20,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 524 transitions, 4361 flow. Second operand has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:20,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:20,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 209 [2022-07-12 10:44:20,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:21,696 INFO L129 PetriNetUnfolder]: 934/4670 cut-off events. [2022-07-12 10:44:21,697 INFO L130 PetriNetUnfolder]: For 19726/19924 co-relation queries the response was YES. [2022-07-12 10:44:21,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13577 conditions, 4670 events. 934/4670 cut-off events. For 19726/19924 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 43860 event pairs, 176 based on Foata normal form. 100/4448 useless extension candidates. Maximal degree in co-relation 13489. Up to 610 conditions per place. [2022-07-12 10:44:21,743 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 81 selfloop transitions, 48 changer transitions 0/566 dead transitions. [2022-07-12 10:44:21,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 566 transitions, 4897 flow [2022-07-12 10:44:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:44:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:44:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1236 transitions. [2022-07-12 10:44:21,745 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8448393711551606 [2022-07-12 10:44:21,745 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1236 transitions. [2022-07-12 10:44:21,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1236 transitions. [2022-07-12 10:44:21,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:21,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1236 transitions. [2022-07-12 10:44:21,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.57142857142858) internal successors, (1236), 7 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:21,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:21,748 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:21,748 INFO L186 Difference]: Start difference. First operand has 388 places, 524 transitions, 4361 flow. Second operand 7 states and 1236 transitions. [2022-07-12 10:44:21,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 566 transitions, 4897 flow [2022-07-12 10:44:21,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 566 transitions, 4399 flow, removed 242 selfloop flow, removed 9 redundant places. [2022-07-12 10:44:21,933 INFO L242 Difference]: Finished difference. Result has 386 places, 527 transitions, 4003 flow [2022-07-12 10:44:21,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=3863, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4003, PETRI_PLACES=386, PETRI_TRANSITIONS=527} [2022-07-12 10:44:21,934 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 199 predicate places. [2022-07-12 10:44:21,934 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 527 transitions, 4003 flow [2022-07-12 10:44:21,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:21,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:21,935 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] [2022-07-12 10:44:21,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:44:22,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:22,149 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1917071363, now seen corresponding path program 1 times [2022-07-12 10:44:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:22,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895590178] [2022-07-12 10:44:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:22,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:22,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:22,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895590178] [2022-07-12 10:44:22,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895590178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:22,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306946220] [2022-07-12 10:44:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:22,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:22,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:22,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:44:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:22,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:44:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:44:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:22,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306946220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:44:22,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:44:22,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-07-12 10:44:22,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255608952] [2022-07-12 10:44:22,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:44:22,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:44:22,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:44:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:44:22,877 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 209 [2022-07-12 10:44:22,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 527 transitions, 4003 flow. Second operand has 23 states, 23 states have (on average 167.2608695652174) internal successors, (3847), 23 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:22,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:22,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 209 [2022-07-12 10:44:22,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:25,779 INFO L129 PetriNetUnfolder]: 1592/7088 cut-off events. [2022-07-12 10:44:25,779 INFO L130 PetriNetUnfolder]: For 30515/30573 co-relation queries the response was YES. [2022-07-12 10:44:25,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21759 conditions, 7088 events. 1592/7088 cut-off events. For 30515/30573 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 69437 event pairs, 229 based on Foata normal form. 79/6741 useless extension candidates. Maximal degree in co-relation 21669. Up to 466 conditions per place. [2022-07-12 10:44:25,854 INFO L132 encePairwiseOnDemand]: 191/209 looper letters, 309 selfloop transitions, 266 changer transitions 1/908 dead transitions. [2022-07-12 10:44:25,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 908 transitions, 7749 flow [2022-07-12 10:44:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 10:44:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-12 10:44:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6925 transitions. [2022-07-12 10:44:25,860 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8283492822966507 [2022-07-12 10:44:25,861 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6925 transitions. [2022-07-12 10:44:25,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6925 transitions. [2022-07-12 10:44:25,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:25,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6925 transitions. [2022-07-12 10:44:25,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 173.125) internal successors, (6925), 40 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:25,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 209.0) internal successors, (8569), 41 states have internal predecessors, (8569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:25,874 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 209.0) internal successors, (8569), 41 states have internal predecessors, (8569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:25,874 INFO L186 Difference]: Start difference. First operand has 386 places, 527 transitions, 4003 flow. Second operand 40 states and 6925 transitions. [2022-07-12 10:44:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 908 transitions, 7749 flow [2022-07-12 10:44:26,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 908 transitions, 7635 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:44:26,014 INFO L242 Difference]: Finished difference. Result has 450 places, 678 transitions, 6378 flow [2022-07-12 10:44:26,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6378, PETRI_PLACES=450, PETRI_TRANSITIONS=678} [2022-07-12 10:44:26,015 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 263 predicate places. [2022-07-12 10:44:26,015 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 678 transitions, 6378 flow [2022-07-12 10:44:26,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 167.2608695652174) internal successors, (3847), 23 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:26,016 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:26,016 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] [2022-07-12 10:44:26,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:44:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:44:26,219 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash 529977865, now seen corresponding path program 2 times [2022-07-12 10:44:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980710665] [2022-07-12 10:44:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:26,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:26,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:26,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980710665] [2022-07-12 10:44:26,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980710665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:26,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522785912] [2022-07-12 10:44:26,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:44:26,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:26,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:26,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:26,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:44:26,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:44:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:44:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:44:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:26,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:44:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:26,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522785912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:44:26,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:44:26,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-07-12 10:44:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101161069] [2022-07-12 10:44:26,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:44:26,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:44:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:44:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:44:26,711 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 209 [2022-07-12 10:44:26,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 678 transitions, 6378 flow. Second operand has 19 states, 19 states have (on average 167.52631578947367) internal successors, (3183), 19 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:26,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:26,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 209 [2022-07-12 10:44:26,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:29,288 INFO L129 PetriNetUnfolder]: 2175/9674 cut-off events. [2022-07-12 10:44:29,288 INFO L130 PetriNetUnfolder]: For 69218/69318 co-relation queries the response was YES. [2022-07-12 10:44:29,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35866 conditions, 9674 events. 2175/9674 cut-off events. For 69218/69318 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 103511 event pairs, 432 based on Foata normal form. 66/9139 useless extension candidates. Maximal degree in co-relation 35750. Up to 1902 conditions per place. [2022-07-12 10:44:29,440 INFO L132 encePairwiseOnDemand]: 187/209 looper letters, 355 selfloop transitions, 356 changer transitions 6/1049 dead transitions. [2022-07-12 10:44:29,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1049 transitions, 12303 flow [2022-07-12 10:44:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:44:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:44:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5183 transitions. [2022-07-12 10:44:29,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266347687400319 [2022-07-12 10:44:29,445 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5183 transitions. [2022-07-12 10:44:29,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5183 transitions. [2022-07-12 10:44:29,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:29,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5183 transitions. [2022-07-12 10:44:29,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 172.76666666666668) internal successors, (5183), 30 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:29,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 209.0) internal successors, (6479), 31 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:29,457 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 209.0) internal successors, (6479), 31 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:29,457 INFO L186 Difference]: Start difference. First operand has 450 places, 678 transitions, 6378 flow. Second operand 30 states and 5183 transitions. [2022-07-12 10:44:29,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1049 transitions, 12303 flow [2022-07-12 10:44:29,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 1049 transitions, 11524 flow, removed 297 selfloop flow, removed 6 redundant places. [2022-07-12 10:44:29,925 INFO L242 Difference]: Finished difference. Result has 488 places, 899 transitions, 10454 flow [2022-07-12 10:44:29,925 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10454, PETRI_PLACES=488, PETRI_TRANSITIONS=899} [2022-07-12 10:44:29,926 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 301 predicate places. [2022-07-12 10:44:29,926 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 899 transitions, 10454 flow [2022-07-12 10:44:29,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.52631578947367) internal successors, (3183), 19 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:29,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:44:29,927 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] [2022-07-12 10:44:29,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:44:30,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:30,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:44:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:44:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -936643847, now seen corresponding path program 1 times [2022-07-12 10:44:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:44:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862480820] [2022-07-12 10:44:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:44:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:44:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:44:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862480820] [2022-07-12 10:44:30,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862480820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:44:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644951412] [2022-07-12 10:44:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:44:30,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:44:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:44:30,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:44:30,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:44:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:44:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 10:44:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:44:30,986 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-12 10:44:30,987 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 26 treesize of output 13 [2022-07-12 10:44:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:31,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:44:31,462 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:44:31,462 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 26 [2022-07-12 10:44:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:44:32,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644951412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:44:32,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:44:32,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 22] total 46 [2022-07-12 10:44:32,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818305540] [2022-07-12 10:44:32,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:44:32,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:44:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:44:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:44:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 10:44:32,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 209 [2022-07-12 10:44:32,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 899 transitions, 10454 flow. Second operand has 46 states, 46 states have (on average 85.8695652173913) internal successors, (3950), 46 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:32,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:44:32,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 209 [2022-07-12 10:44:32,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:44:55,956 INFO L129 PetriNetUnfolder]: 27328/58132 cut-off events. [2022-07-12 10:44:55,956 INFO L130 PetriNetUnfolder]: For 433057/433749 co-relation queries the response was YES. [2022-07-12 10:44:57,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222438 conditions, 58132 events. 27328/58132 cut-off events. For 433057/433749 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 637973 event pairs, 4954 based on Foata normal form. 433/55704 useless extension candidates. Maximal degree in co-relation 222312. Up to 22667 conditions per place. [2022-07-12 10:44:57,708 INFO L132 encePairwiseOnDemand]: 151/209 looper letters, 1641 selfloop transitions, 619 changer transitions 297/2763 dead transitions. [2022-07-12 10:44:57,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 2763 transitions, 29146 flow [2022-07-12 10:44:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-07-12 10:44:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2022-07-12 10:44:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 15909 transitions. [2022-07-12 10:44:57,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4349692412850308 [2022-07-12 10:44:57,730 INFO L72 ComplementDD]: Start complementDD. Operand 175 states and 15909 transitions. [2022-07-12 10:44:57,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 15909 transitions. [2022-07-12 10:44:57,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:44:57,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 175 states and 15909 transitions. [2022-07-12 10:44:57,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 176 states, 175 states have (on average 90.90857142857143) internal successors, (15909), 175 states have internal predecessors, (15909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:57,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 176 states, 176 states have (on average 209.0) internal successors, (36784), 176 states have internal predecessors, (36784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:57,905 INFO L81 ComplementDD]: Finished complementDD. Result has 176 states, 176 states have (on average 209.0) internal successors, (36784), 176 states have internal predecessors, (36784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:44:57,905 INFO L186 Difference]: Start difference. First operand has 488 places, 899 transitions, 10454 flow. Second operand 175 states and 15909 transitions. [2022-07-12 10:44:57,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 2763 transitions, 29146 flow [2022-07-12 10:45:03,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 2763 transitions, 27857 flow, removed 504 selfloop flow, removed 7 redundant places. [2022-07-12 10:45:03,069 INFO L242 Difference]: Finished difference. Result has 787 places, 1341 transitions, 15808 flow [2022-07-12 10:45:03,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=9748, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=15808, PETRI_PLACES=787, PETRI_TRANSITIONS=1341} [2022-07-12 10:45:03,070 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 600 predicate places. [2022-07-12 10:45:03,070 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 1341 transitions, 15808 flow [2022-07-12 10:45:03,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 85.8695652173913) internal successors, (3950), 46 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:03,071 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:03,071 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] [2022-07-12 10:45:03,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:03,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:03,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1868961211, now seen corresponding path program 2 times [2022-07-12 10:45:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:03,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561913850] [2022-07-12 10:45:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:03,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:03,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:03,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561913850] [2022-07-12 10:45:03,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561913850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931322514] [2022-07-12 10:45:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:45:03,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:03,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:03,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:45:03,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:45:03,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:45:03,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 10:45:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:04,272 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-12 10:45:04,273 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-12 10:45:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:04,583 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:45:04,584 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-07-12 10:45:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:05,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931322514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:05,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:05,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 21] total 46 [2022-07-12 10:45:05,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376390687] [2022-07-12 10:45:05,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:05,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:45:05,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:05,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:45:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 10:45:05,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 209 [2022-07-12 10:45:05,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1341 transitions, 15808 flow. Second operand has 46 states, 46 states have (on average 85.8695652173913) internal successors, (3950), 46 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:05,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:05,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 209 [2022-07-12 10:45:05,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand