./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 791161d1 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-?-791161d [2022-07-22 22:00:44,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 22:00:44,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 22:00:44,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 22:00:44,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 22:00:44,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 22:00:44,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 22:00:44,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 22:00:44,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 22:00:44,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 22:00:44,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 22:00:44,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 22:00:44,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 22:00:44,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 22:00:44,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 22:00:45,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 22:00:45,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 22:00:45,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 22:00:45,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 22:00:45,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 22:00:45,009 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 22:00:45,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 22:00:45,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 22:00:45,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 22:00:45,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 22:00:45,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 22:00:45,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 22:00:45,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 22:00:45,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 22:00:45,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 22:00:45,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 22:00:45,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 22:00:45,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 22:00:45,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 22:00:45,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 22:00:45,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 22:00:45,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 22:00:45,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 22:00:45,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 22:00:45,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 22:00:45,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 22:00:45,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 22:00:45,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 22:00:45,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 22:00:45,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 22:00:45,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 22:00:45,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 22:00:45,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 22:00:45,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 22:00:45,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 22:00:45,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 22:00:45,051 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 22:00:45,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 22:00:45,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 22:00:45,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 22:00:45,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 22:00:45,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 22:00:45,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 22:00:45,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 22:00:45,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 22:00:45,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 22:00:45,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 22:00:45,053 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 22:00:45,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 22:00:45,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 22:00:45,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 22:00:45,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 22:00:45,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:00:45,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 22:00:45,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 22:00:45,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 22:00:45,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 22:00:45,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 22:00:45,057 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 22:00:45,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 22:00:45,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 22:00:45,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade [2022-07-22 22:00:45,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 22:00:45,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 22:00:45,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 22:00:45,271 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 22:00:45,271 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 22:00:45,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2022-07-22 22:00:45,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5039e566e/b267898dee934a9888fa091bda6f28fc/FLAG43a33f6b5 [2022-07-22 22:00:45,681 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 22:00:45,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2022-07-22 22:00:45,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5039e566e/b267898dee934a9888fa091bda6f28fc/FLAG43a33f6b5 [2022-07-22 22:00:46,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5039e566e/b267898dee934a9888fa091bda6f28fc [2022-07-22 22:00:46,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 22:00:46,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 22:00:46,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 22:00:46,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 22:00:46,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 22:00:46,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d9efc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46, skipping insertion in model container [2022-07-22 22:00:46,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 22:00:46,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 22:00:46,259 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] [2022-07-22 22:00:46,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:00:46,269 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 22:00:46,295 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] [2022-07-22 22:00:46,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:00:46,315 INFO L208 MainTranslator]: Completed translation [2022-07-22 22:00:46,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46 WrapperNode [2022-07-22 22:00:46,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 22:00:46,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 22:00:46,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 22:00:46,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 22:00:46,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,366 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 162 [2022-07-22 22:00:46,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 22:00:46,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 22:00:46,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 22:00:46,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 22:00:46,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 22:00:46,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 22:00:46,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 22:00:46,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 22:00:46,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (1/1) ... [2022-07-22 22:00:46,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:00:46,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:46,424 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) [2022-07-22 22:00:46,429 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 [2022-07-22 22:00:46,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 22:00:46,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 22:00:46,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 22:00:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 22:00:46,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 22:00:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 22:00:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 22:00:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 22:00:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 22:00:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 22:00:46,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 22:00:46,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 22:00:46,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 22:00:46,458 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 22:00:46,525 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 22:00:46,527 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 22:00:46,781 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 22:00:46,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 22:00:46,788 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 22:00:46,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:00:46 BoogieIcfgContainer [2022-07-22 22:00:46,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 22:00:46,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 22:00:46,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 22:00:46,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 22:00:46,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:00:46" (1/3) ... [2022-07-22 22:00:46,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dac2fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:00:46, skipping insertion in model container [2022-07-22 22:00:46,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:00:46" (2/3) ... [2022-07-22 22:00:46,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dac2fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:00:46, skipping insertion in model container [2022-07-22 22:00:46,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:00:46" (3/3) ... [2022-07-22 22:00:46,805 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2022-07-22 22:00:46,809 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 22:00:46,816 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 22:00:46,816 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 22:00:46,816 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 22:00:46,862 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 22:00:46,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 209 transitions, 434 flow [2022-07-22 22:00:47,011 INFO L129 PetriNetUnfolder]: 18/207 cut-off events. [2022-07-22 22:00:47,012 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 22:00:47,016 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. [2022-07-22 22:00:47,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 209 transitions, 434 flow [2022-07-22 22:00:47,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 198 transitions, 408 flow [2022-07-22 22:00:47,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 22:00:47,037 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@7f85a089, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e345d15 [2022-07-22 22:00:47,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 22:00:47,067 INFO L129 PetriNetUnfolder]: 16/181 cut-off events. [2022-07-22 22:00:47,068 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 22:00:47,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:47,068 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:00:47,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash -652717319, now seen corresponding path program 1 times [2022-07-22 22:00:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:47,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850010043] [2022-07-22 22:00:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:47,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850010043] [2022-07-22 22:00:47,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850010043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:47,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:47,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 22:00:47,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162670813] [2022-07-22 22:00:47,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:47,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 22:00:47,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:47,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 22:00:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 22:00:47,331 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 209 [2022-07-22 22:00:47,337 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) [2022-07-22 22:00:47,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:47,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 209 [2022-07-22 22:00:47,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:47,387 INFO L129 PetriNetUnfolder]: 5/185 cut-off events. [2022-07-22 22:00:47,387 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 22:00:47,389 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. [2022-07-22 22:00:47,391 INFO L132 encePairwiseOnDemand]: 196/209 looper letters, 4 selfloop transitions, 0 changer transitions 4/185 dead transitions. [2022-07-22 22:00:47,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 185 transitions, 390 flow [2022-07-22 22:00:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 22:00:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 22:00:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 399 transitions. [2022-07-22 22:00:47,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9545454545454546 [2022-07-22 22:00:47,408 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 399 transitions. [2022-07-22 22:00:47,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 399 transitions. [2022-07-22 22:00:47,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:47,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 399 transitions. [2022-07-22 22:00:47,423 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) [2022-07-22 22:00:47,438 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) [2022-07-22 22:00:47,439 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) [2022-07-22 22:00:47,441 INFO L186 Difference]: Start difference. First operand has 187 places, 198 transitions, 408 flow. Second operand 2 states and 399 transitions. [2022-07-22 22:00:47,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 185 transitions, 390 flow [2022-07-22 22:00:47,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 185 transitions, 382 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 22:00:47,448 INFO L242 Difference]: Finished difference. Result has 184 places, 181 transitions, 366 flow [2022-07-22 22:00:47,450 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} [2022-07-22 22:00:47,453 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -3 predicate places. [2022-07-22 22:00:47,454 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 181 transitions, 366 flow [2022-07-22 22:00:47,454 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) [2022-07-22 22:00:47,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:47,455 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] [2022-07-22 22:00:47,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 22:00:47,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:47,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1212347192, now seen corresponding path program 1 times [2022-07-22 22:00:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:47,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337639478] [2022-07-22 22:00:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:47,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:47,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:47,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337639478] [2022-07-22 22:00:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337639478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:47,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:47,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 22:00:47,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243220412] [2022-07-22 22:00:47,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:47,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 22:00:47,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 22:00:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 22:00:47,733 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 209 [2022-07-22 22:00:47,735 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) [2022-07-22 22:00:47,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:47,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 209 [2022-07-22 22:00:47,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:47,894 INFO L129 PetriNetUnfolder]: 158/765 cut-off events. [2022-07-22 22:00:47,895 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-22 22:00:47,898 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. [2022-07-22 22:00:47,901 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 39 selfloop transitions, 7 changer transitions 0/202 dead transitions. [2022-07-22 22:00:47,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 202 transitions, 502 flow [2022-07-22 22:00:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 22:00:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 22:00:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 727 transitions. [2022-07-22 22:00:47,904 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8696172248803827 [2022-07-22 22:00:47,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 727 transitions. [2022-07-22 22:00:47,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 727 transitions. [2022-07-22 22:00:47,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:47,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 727 transitions. [2022-07-22 22:00:47,906 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) [2022-07-22 22:00:47,910 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) [2022-07-22 22:00:47,910 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) [2022-07-22 22:00:47,910 INFO L186 Difference]: Start difference. First operand has 184 places, 181 transitions, 366 flow. Second operand 4 states and 727 transitions. [2022-07-22 22:00:47,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 202 transitions, 502 flow [2022-07-22 22:00:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 202 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 22:00:47,918 INFO L242 Difference]: Finished difference. Result has 185 places, 187 transitions, 413 flow [2022-07-22 22:00:47,918 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} [2022-07-22 22:00:47,919 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, -2 predicate places. [2022-07-22 22:00:47,919 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 187 transitions, 413 flow [2022-07-22 22:00:47,920 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) [2022-07-22 22:00:47,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:47,920 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] [2022-07-22 22:00:47,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 22:00:47,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash -123130560, now seen corresponding path program 1 times [2022-07-22 22:00:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:47,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740317768] [2022-07-22 22:00:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:48,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740317768] [2022-07-22 22:00:48,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740317768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:48,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:48,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:00:48,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753843834] [2022-07-22 22:00:48,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:48,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:00:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:00:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:00:48,074 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-22 22:00:48,075 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) [2022-07-22 22:00:48,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:48,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-22 22:00:48,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:48,319 INFO L129 PetriNetUnfolder]: 366/1796 cut-off events. [2022-07-22 22:00:48,320 INFO L130 PetriNetUnfolder]: For 193/195 co-relation queries the response was YES. [2022-07-22 22:00:48,324 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. [2022-07-22 22:00:48,329 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 83 selfloop transitions, 7 changer transitions 0/243 dead transitions. [2022-07-22 22:00:48,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 243 transitions, 774 flow [2022-07-22 22:00:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:00:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 22:00:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1077 transitions. [2022-07-22 22:00:48,332 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8588516746411483 [2022-07-22 22:00:48,332 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1077 transitions. [2022-07-22 22:00:48,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1077 transitions. [2022-07-22 22:00:48,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:48,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1077 transitions. [2022-07-22 22:00:48,334 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) [2022-07-22 22:00:48,353 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) [2022-07-22 22:00:48,354 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) [2022-07-22 22:00:48,354 INFO L186 Difference]: Start difference. First operand has 185 places, 187 transitions, 413 flow. Second operand 6 states and 1077 transitions. [2022-07-22 22:00:48,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 243 transitions, 774 flow [2022-07-22 22:00:48,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 243 transitions, 774 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 22:00:48,366 INFO L242 Difference]: Finished difference. Result has 193 places, 191 transitions, 459 flow [2022-07-22 22:00:48,366 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} [2022-07-22 22:00:48,368 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 6 predicate places. [2022-07-22 22:00:48,368 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 191 transitions, 459 flow [2022-07-22 22:00:48,369 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) [2022-07-22 22:00:48,369 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:48,369 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] [2022-07-22 22:00:48,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 22:00:48,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 749567470, now seen corresponding path program 2 times [2022-07-22 22:00:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303649703] [2022-07-22 22:00:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:48,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303649703] [2022-07-22 22:00:48,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303649703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:48,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:48,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 22:00:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457550] [2022-07-22 22:00:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:00:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:48,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:00:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:00:48,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-22 22:00:48,575 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) [2022-07-22 22:00:48,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:48,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-22 22:00:48,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:48,954 INFO L129 PetriNetUnfolder]: 407/2024 cut-off events. [2022-07-22 22:00:48,955 INFO L130 PetriNetUnfolder]: For 546/548 co-relation queries the response was YES. [2022-07-22 22:00:48,959 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. [2022-07-22 22:00:48,965 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 71 selfloop transitions, 13 changer transitions 0/237 dead transitions. [2022-07-22 22:00:48,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 237 transitions, 791 flow [2022-07-22 22:00:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 22:00:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 22:00:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1244 transitions. [2022-07-22 22:00:48,969 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8503075871496925 [2022-07-22 22:00:48,969 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1244 transitions. [2022-07-22 22:00:48,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1244 transitions. [2022-07-22 22:00:48,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:48,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1244 transitions. [2022-07-22 22:00:48,973 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) [2022-07-22 22:00:48,975 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) [2022-07-22 22:00:48,976 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) [2022-07-22 22:00:48,976 INFO L186 Difference]: Start difference. First operand has 193 places, 191 transitions, 459 flow. Second operand 7 states and 1244 transitions. [2022-07-22 22:00:48,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 237 transitions, 791 flow [2022-07-22 22:00:48,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 237 transitions, 765 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-22 22:00:48,983 INFO L242 Difference]: Finished difference. Result has 202 places, 196 transitions, 534 flow [2022-07-22 22:00:48,983 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} [2022-07-22 22:00:48,984 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 15 predicate places. [2022-07-22 22:00:48,984 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 196 transitions, 534 flow [2022-07-22 22:00:48,984 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) [2022-07-22 22:00:48,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:48,985 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] [2022-07-22 22:00:48,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 22:00:48,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1940410436, now seen corresponding path program 3 times [2022-07-22 22:00:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742997507] [2022-07-22 22:00:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:48,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:49,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:49,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742997507] [2022-07-22 22:00:49,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742997507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:49,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:49,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:00:49,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392856870] [2022-07-22 22:00:49,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:49,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:00:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:00:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:00:49,066 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-22 22:00:49,067 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) [2022-07-22 22:00:49,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:49,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-22 22:00:49,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:49,343 INFO L129 PetriNetUnfolder]: 440/2219 cut-off events. [2022-07-22 22:00:49,344 INFO L130 PetriNetUnfolder]: For 1416/1428 co-relation queries the response was YES. [2022-07-22 22:00:49,349 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. [2022-07-22 22:00:49,355 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 77 selfloop transitions, 16 changer transitions 0/246 dead transitions. [2022-07-22 22:00:49,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 246 transitions, 960 flow [2022-07-22 22:00:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:00:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 22:00:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2022-07-22 22:00:49,357 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8679425837320575 [2022-07-22 22:00:49,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2022-07-22 22:00:49,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2022-07-22 22:00:49,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:49,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2022-07-22 22:00:49,359 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) [2022-07-22 22:00:49,360 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) [2022-07-22 22:00:49,361 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) [2022-07-22 22:00:49,361 INFO L186 Difference]: Start difference. First operand has 202 places, 196 transitions, 534 flow. Second operand 5 states and 907 transitions. [2022-07-22 22:00:49,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 246 transitions, 960 flow [2022-07-22 22:00:49,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 246 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 22:00:49,367 INFO L242 Difference]: Finished difference. Result has 208 places, 204 transitions, 672 flow [2022-07-22 22:00:49,368 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} [2022-07-22 22:00:49,368 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 21 predicate places. [2022-07-22 22:00:49,369 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 204 transitions, 672 flow [2022-07-22 22:00:49,369 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) [2022-07-22 22:00:49,369 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:49,369 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] [2022-07-22 22:00:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 22:00:49,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 336336672, now seen corresponding path program 4 times [2022-07-22 22:00:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220769260] [2022-07-22 22:00:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:49,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:49,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220769260] [2022-07-22 22:00:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220769260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:49,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:49,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 22:00:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526036699] [2022-07-22 22:00:49,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:49,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:00:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:00:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:00:49,535 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-22 22:00:49,536 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) [2022-07-22 22:00:49,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:49,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-22 22:00:49,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:49,884 INFO L129 PetriNetUnfolder]: 449/2274 cut-off events. [2022-07-22 22:00:49,884 INFO L130 PetriNetUnfolder]: For 2385/2397 co-relation queries the response was YES. [2022-07-22 22:00:49,889 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. [2022-07-22 22:00:49,895 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 78 selfloop transitions, 18 changer transitions 0/249 dead transitions. [2022-07-22 22:00:49,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 249 transitions, 1056 flow [2022-07-22 22:00:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:00:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 22:00:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1078 transitions. [2022-07-22 22:00:49,897 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8596491228070176 [2022-07-22 22:00:49,898 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1078 transitions. [2022-07-22 22:00:49,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1078 transitions. [2022-07-22 22:00:49,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:49,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1078 transitions. [2022-07-22 22:00:49,900 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) [2022-07-22 22:00:49,902 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) [2022-07-22 22:00:49,902 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) [2022-07-22 22:00:49,902 INFO L186 Difference]: Start difference. First operand has 208 places, 204 transitions, 672 flow. Second operand 6 states and 1078 transitions. [2022-07-22 22:00:49,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 249 transitions, 1056 flow [2022-07-22 22:00:49,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 249 transitions, 1029 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-22 22:00:49,911 INFO L242 Difference]: Finished difference. Result has 215 places, 207 transitions, 737 flow [2022-07-22 22:00:49,911 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} [2022-07-22 22:00:49,913 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 28 predicate places. [2022-07-22 22:00:49,913 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 207 transitions, 737 flow [2022-07-22 22:00:49,914 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) [2022-07-22 22:00:49,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:49,914 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] [2022-07-22 22:00:49,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 22:00:49,914 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash -347218618, now seen corresponding path program 5 times [2022-07-22 22:00:49,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:49,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760650519] [2022-07-22 22:00:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:49,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:50,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760650519] [2022-07-22 22:00:50,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760650519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:50,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:50,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:00:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611834688] [2022-07-22 22:00:50,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:50,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:00:50,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:00:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:00:50,017 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-22 22:00:50,018 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) [2022-07-22 22:00:50,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:50,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-22 22:00:50,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:50,290 INFO L129 PetriNetUnfolder]: 447/2234 cut-off events. [2022-07-22 22:00:50,291 INFO L130 PetriNetUnfolder]: For 2688/2690 co-relation queries the response was YES. [2022-07-22 22:00:50,315 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. [2022-07-22 22:00:50,321 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 63 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2022-07-22 22:00:50,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 238 transitions, 1084 flow [2022-07-22 22:00:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:00:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 22:00:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2022-07-22 22:00:50,323 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8564593301435407 [2022-07-22 22:00:50,323 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2022-07-22 22:00:50,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2022-07-22 22:00:50,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:50,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2022-07-22 22:00:50,325 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) [2022-07-22 22:00:50,326 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) [2022-07-22 22:00:50,327 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) [2022-07-22 22:00:50,327 INFO L186 Difference]: Start difference. First operand has 215 places, 207 transitions, 737 flow. Second operand 5 states and 895 transitions. [2022-07-22 22:00:50,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 238 transitions, 1084 flow [2022-07-22 22:00:50,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 238 transitions, 1053 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 22:00:50,334 INFO L242 Difference]: Finished difference. Result has 220 places, 215 transitions, 880 flow [2022-07-22 22:00:50,335 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} [2022-07-22 22:00:50,335 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 33 predicate places. [2022-07-22 22:00:50,335 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 215 transitions, 880 flow [2022-07-22 22:00:50,336 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) [2022-07-22 22:00:50,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:50,336 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] [2022-07-22 22:00:50,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 22:00:50,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:50,337 INFO L85 PathProgramCache]: Analyzing trace with hash -780781578, now seen corresponding path program 6 times [2022-07-22 22:00:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:50,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800205705] [2022-07-22 22:00:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:50,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:50,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800205705] [2022-07-22 22:00:50,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800205705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:50,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:00:50,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 22:00:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163547783] [2022-07-22 22:00:50,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:00:50,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:00:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:00:50,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 209 [2022-07-22 22:00:50,484 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) [2022-07-22 22:00:50,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:50,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 209 [2022-07-22 22:00:50,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:50,826 INFO L129 PetriNetUnfolder]: 431/2167 cut-off events. [2022-07-22 22:00:50,826 INFO L130 PetriNetUnfolder]: For 3157/3159 co-relation queries the response was YES. [2022-07-22 22:00:50,834 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. [2022-07-22 22:00:50,841 INFO L132 encePairwiseOnDemand]: 202/209 looper letters, 68 selfloop transitions, 24 changer transitions 0/245 dead transitions. [2022-07-22 22:00:50,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 245 transitions, 1176 flow [2022-07-22 22:00:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:00:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 22:00:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1070 transitions. [2022-07-22 22:00:50,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8532695374800638 [2022-07-22 22:00:50,844 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1070 transitions. [2022-07-22 22:00:50,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1070 transitions. [2022-07-22 22:00:50,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:50,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1070 transitions. [2022-07-22 22:00:50,847 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) [2022-07-22 22:00:50,848 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) [2022-07-22 22:00:50,849 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) [2022-07-22 22:00:50,849 INFO L186 Difference]: Start difference. First operand has 220 places, 215 transitions, 880 flow. Second operand 6 states and 1070 transitions. [2022-07-22 22:00:50,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 245 transitions, 1176 flow [2022-07-22 22:00:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 245 transitions, 1136 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-22 22:00:50,861 INFO L242 Difference]: Finished difference. Result has 227 places, 218 transitions, 954 flow [2022-07-22 22:00:50,861 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} [2022-07-22 22:00:50,862 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 40 predicate places. [2022-07-22 22:00:50,862 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 218 transitions, 954 flow [2022-07-22 22:00:50,863 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) [2022-07-22 22:00:50,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:50,863 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] [2022-07-22 22:00:50,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 22:00:50,863 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash -894123993, now seen corresponding path program 1 times [2022-07-22 22:00:50,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271909256] [2022-07-22 22:00:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:50,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271909256] [2022-07-22 22:00:51,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271909256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:51,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568420475] [2022-07-22 22:00:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:51,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:51,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:51,050 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) [2022-07-22 22:00:51,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 22:00:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 22:00:51,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:51,594 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 [2022-07-22 22:00:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:51,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:51,756 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 22:00:51,757 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 [2022-07-22 22:00:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:51,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568420475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:51,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 9] total 23 [2022-07-22 22:00:51,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227405878] [2022-07-22 22:00:51,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:51,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 22:00:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 22:00:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:00:51,846 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 209 [2022-07-22 22:00:51,849 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) [2022-07-22 22:00:51,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:51,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 209 [2022-07-22 22:00:51,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:55,671 INFO L129 PetriNetUnfolder]: 7216/16942 cut-off events. [2022-07-22 22:00:55,672 INFO L130 PetriNetUnfolder]: For 21628/21628 co-relation queries the response was YES. [2022-07-22 22:00:55,732 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. [2022-07-22 22:00:55,790 INFO L132 encePairwiseOnDemand]: 177/209 looper letters, 673 selfloop transitions, 139 changer transitions 8/916 dead transitions. [2022-07-22 22:00:55,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 916 transitions, 5579 flow [2022-07-22 22:00:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 22:00:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-22 22:00:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6235 transitions. [2022-07-22 22:00:55,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5737026131762973 [2022-07-22 22:00:55,802 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6235 transitions. [2022-07-22 22:00:55,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6235 transitions. [2022-07-22 22:00:55,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:55,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6235 transitions. [2022-07-22 22:00:55,813 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) [2022-07-22 22:00:55,824 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) [2022-07-22 22:00:55,826 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) [2022-07-22 22:00:55,826 INFO L186 Difference]: Start difference. First operand has 227 places, 218 transitions, 954 flow. Second operand 52 states and 6235 transitions. [2022-07-22 22:00:55,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 916 transitions, 5579 flow [2022-07-22 22:00:55,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 916 transitions, 5384 flow, removed 29 selfloop flow, removed 2 redundant places. [2022-07-22 22:00:55,885 INFO L242 Difference]: Finished difference. Result has 307 places, 361 transitions, 2051 flow [2022-07-22 22:00:55,885 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} [2022-07-22 22:00:55,886 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 120 predicate places. [2022-07-22 22:00:55,886 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 361 transitions, 2051 flow [2022-07-22 22:00:55,891 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) [2022-07-22 22:00:55,891 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:55,891 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] [2022-07-22 22:00:55,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 22:00:56,097 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 [2022-07-22 22:00:56,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:56,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1707261297, now seen corresponding path program 2 times [2022-07-22 22:00:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:56,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772244523] [2022-07-22 22:00:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:56,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:56,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772244523] [2022-07-22 22:00:56,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772244523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:56,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262330830] [2022-07-22 22:00:56,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:00:56,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:56,328 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) [2022-07-22 22:00:56,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 22:00:56,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 22:00:56,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:00:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 22:00:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:00:56,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:00:56,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262330830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:00:56,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:00:56,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-22 22:00:56,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87454118] [2022-07-22 22:00:56,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:00:56,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:00:56,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:00:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:00:56,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 209 [2022-07-22 22:00:56,485 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) [2022-07-22 22:00:56,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:56,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 209 [2022-07-22 22:00:56,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:57,062 INFO L129 PetriNetUnfolder]: 504/4014 cut-off events. [2022-07-22 22:00:57,063 INFO L130 PetriNetUnfolder]: For 7289/7320 co-relation queries the response was YES. [2022-07-22 22:00:57,086 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. [2022-07-22 22:00:57,095 INFO L132 encePairwiseOnDemand]: 197/209 looper letters, 31 selfloop transitions, 11 changer transitions 0/365 dead transitions. [2022-07-22 22:00:57,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 365 transitions, 2143 flow [2022-07-22 22:00:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 22:00:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 22:00:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1726 transitions. [2022-07-22 22:00:57,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750761200521966 [2022-07-22 22:00:57,100 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1726 transitions. [2022-07-22 22:00:57,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1726 transitions. [2022-07-22 22:00:57,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:57,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1726 transitions. [2022-07-22 22:00:57,104 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) [2022-07-22 22:00:57,107 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) [2022-07-22 22:00:57,107 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) [2022-07-22 22:00:57,108 INFO L186 Difference]: Start difference. First operand has 307 places, 361 transitions, 2051 flow. Second operand 11 states and 1726 transitions. [2022-07-22 22:00:57,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 365 transitions, 2143 flow [2022-07-22 22:00:57,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 365 transitions, 2048 flow, removed 22 selfloop flow, removed 10 redundant places. [2022-07-22 22:00:57,152 INFO L242 Difference]: Finished difference. Result has 306 places, 362 transitions, 1986 flow [2022-07-22 22:00:57,152 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} [2022-07-22 22:00:57,153 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 119 predicate places. [2022-07-22 22:00:57,153 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 362 transitions, 1986 flow [2022-07-22 22:00:57,154 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) [2022-07-22 22:00:57,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:57,154 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] [2022-07-22 22:00:57,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 22:00:57,367 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 [2022-07-22 22:00:57,367 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1707571491, now seen corresponding path program 1 times [2022-07-22 22:00:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:57,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725732506] [2022-07-22 22:00:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:57,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:00:57,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725732506] [2022-07-22 22:00:57,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725732506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481722719] [2022-07-22 22:00:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:57,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:57,538 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) [2022-07-22 22:00:57,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 22:00:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 22:00:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:58,015 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 [2022-07-22 22:00:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:00:58,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:58,123 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 22:00:58,124 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 [2022-07-22 22:00:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:00:58,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481722719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:58,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:58,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 9] total 22 [2022-07-22 22:00:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489659524] [2022-07-22 22:00:58,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 22:00:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 22:00:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-07-22 22:00:58,200 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 209 [2022-07-22 22:00:58,202 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) [2022-07-22 22:00:58,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:58,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 209 [2022-07-22 22:00:58,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:01:02,352 INFO L129 PetriNetUnfolder]: 8412/19466 cut-off events. [2022-07-22 22:01:02,352 INFO L130 PetriNetUnfolder]: For 50835/50931 co-relation queries the response was YES. [2022-07-22 22:01:02,445 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. [2022-07-22 22:01:02,504 INFO L132 encePairwiseOnDemand]: 178/209 looper letters, 587 selfloop transitions, 207 changer transitions 4/895 dead transitions. [2022-07-22 22:01:02,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 895 transitions, 6766 flow [2022-07-22 22:01:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 22:01:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-22 22:01:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 7014 transitions. [2022-07-22 22:01:02,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.550160796925249 [2022-07-22 22:01:02,513 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 7014 transitions. [2022-07-22 22:01:02,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 7014 transitions. [2022-07-22 22:01:02,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:01:02,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 7014 transitions. [2022-07-22 22:01:02,523 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) [2022-07-22 22:01:02,536 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) [2022-07-22 22:01:02,538 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) [2022-07-22 22:01:02,538 INFO L186 Difference]: Start difference. First operand has 306 places, 362 transitions, 1986 flow. Second operand 61 states and 7014 transitions. [2022-07-22 22:01:02,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 895 transitions, 6766 flow [2022-07-22 22:01:02,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 895 transitions, 6746 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-22 22:01:02,738 INFO L242 Difference]: Finished difference. Result has 388 places, 524 transitions, 4361 flow [2022-07-22 22:01:02,739 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} [2022-07-22 22:01:02,739 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 201 predicate places. [2022-07-22 22:01:02,739 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 524 transitions, 4361 flow [2022-07-22 22:01:02,740 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) [2022-07-22 22:01:02,740 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:02,740 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] [2022-07-22 22:01:02,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:02,948 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 [2022-07-22 22:01:02,948 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:02,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2081660607, now seen corresponding path program 2 times [2022-07-22 22:01:02,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:02,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551958223] [2022-07-22 22:01:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:03,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:03,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551958223] [2022-07-22 22:01:03,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551958223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:03,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155650155] [2022-07-22 22:01:03,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:01:03,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:03,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:03,126 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) [2022-07-22 22:01:03,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 22:01:03,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 22:01:03,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:01:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 22:01:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 22:01:03,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:01:03,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155650155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:01:03,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:01:03,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-07-22 22:01:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203625118] [2022-07-22 22:01:03,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:01:03,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:01:03,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:01:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-22 22:01:03,345 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 209 [2022-07-22 22:01:03,346 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) [2022-07-22 22:01:03,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:03,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 209 [2022-07-22 22:01:03,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:01:04,101 INFO L129 PetriNetUnfolder]: 934/4670 cut-off events. [2022-07-22 22:01:04,101 INFO L130 PetriNetUnfolder]: For 19726/19924 co-relation queries the response was YES. [2022-07-22 22:01:04,209 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. [2022-07-22 22:01:04,222 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 81 selfloop transitions, 48 changer transitions 0/566 dead transitions. [2022-07-22 22:01:04,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 566 transitions, 4897 flow [2022-07-22 22:01:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 22:01:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 22:01:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1236 transitions. [2022-07-22 22:01:04,224 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8448393711551606 [2022-07-22 22:01:04,224 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1236 transitions. [2022-07-22 22:01:04,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1236 transitions. [2022-07-22 22:01:04,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:01:04,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1236 transitions. [2022-07-22 22:01:04,227 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) [2022-07-22 22:01:04,228 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) [2022-07-22 22:01:04,228 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) [2022-07-22 22:01:04,228 INFO L186 Difference]: Start difference. First operand has 388 places, 524 transitions, 4361 flow. Second operand 7 states and 1236 transitions. [2022-07-22 22:01:04,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 566 transitions, 4897 flow [2022-07-22 22:01:04,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 566 transitions, 4399 flow, removed 242 selfloop flow, removed 9 redundant places. [2022-07-22 22:01:04,354 INFO L242 Difference]: Finished difference. Result has 386 places, 527 transitions, 4003 flow [2022-07-22 22:01:04,355 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} [2022-07-22 22:01:04,357 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 199 predicate places. [2022-07-22 22:01:04,357 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 527 transitions, 4003 flow [2022-07-22 22:01:04,357 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) [2022-07-22 22:01:04,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:04,357 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] [2022-07-22 22:01:04,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:04,563 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 [2022-07-22 22:01:04,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:04,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1917071363, now seen corresponding path program 1 times [2022-07-22 22:01:04,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:04,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197035850] [2022-07-22 22:01:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:04,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:04,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:04,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197035850] [2022-07-22 22:01:04,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197035850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:04,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333075737] [2022-07-22 22:01:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:04,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:04,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:04,898 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) [2022-07-22 22:01:04,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 22:01:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:04,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 22:01:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:05,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:01:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:05,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333075737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:01:05,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:01:05,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-07-22 22:01:05,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695594079] [2022-07-22 22:01:05,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:01:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 22:01:05,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 22:01:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:01:05,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 209 [2022-07-22 22:01:05,444 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) [2022-07-22 22:01:05,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:05,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 209 [2022-07-22 22:01:05,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:01:08,504 INFO L129 PetriNetUnfolder]: 1592/7088 cut-off events. [2022-07-22 22:01:08,504 INFO L130 PetriNetUnfolder]: For 30515/30573 co-relation queries the response was YES. [2022-07-22 22:01:08,556 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. [2022-07-22 22:01:08,575 INFO L132 encePairwiseOnDemand]: 191/209 looper letters, 309 selfloop transitions, 266 changer transitions 1/908 dead transitions. [2022-07-22 22:01:08,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 908 transitions, 7749 flow [2022-07-22 22:01:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 22:01:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-22 22:01:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6925 transitions. [2022-07-22 22:01:08,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8283492822966507 [2022-07-22 22:01:08,592 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6925 transitions. [2022-07-22 22:01:08,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6925 transitions. [2022-07-22 22:01:08,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:01:08,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6925 transitions. [2022-07-22 22:01:08,602 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) [2022-07-22 22:01:08,610 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) [2022-07-22 22:01:08,611 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) [2022-07-22 22:01:08,611 INFO L186 Difference]: Start difference. First operand has 386 places, 527 transitions, 4003 flow. Second operand 40 states and 6925 transitions. [2022-07-22 22:01:08,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 908 transitions, 7749 flow [2022-07-22 22:01:08,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 908 transitions, 7635 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 22:01:08,778 INFO L242 Difference]: Finished difference. Result has 450 places, 678 transitions, 6378 flow [2022-07-22 22:01:08,779 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} [2022-07-22 22:01:08,779 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 263 predicate places. [2022-07-22 22:01:08,780 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 678 transitions, 6378 flow [2022-07-22 22:01:08,780 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) [2022-07-22 22:01:08,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:08,781 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] [2022-07-22 22:01:08,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:08,999 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 [2022-07-22 22:01:09,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash 529977865, now seen corresponding path program 2 times [2022-07-22 22:01:09,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590610536] [2022-07-22 22:01:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:09,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:09,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590610536] [2022-07-22 22:01:09,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590610536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352727572] [2022-07-22 22:01:09,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:01:09,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:09,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:09,147 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) [2022-07-22 22:01:09,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 22:01:09,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:01:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:01:09,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 22:01:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:09,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:01:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:09,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352727572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:01:09,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:01:09,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-07-22 22:01:09,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486093395] [2022-07-22 22:01:09,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:01:09,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 22:01:09,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 22:01:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-22 22:01:09,537 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 209 [2022-07-22 22:01:09,539 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) [2022-07-22 22:01:09,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:09,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 209 [2022-07-22 22:01:09,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:01:12,522 INFO L129 PetriNetUnfolder]: 2175/9674 cut-off events. [2022-07-22 22:01:12,522 INFO L130 PetriNetUnfolder]: For 69218/69318 co-relation queries the response was YES. [2022-07-22 22:01:12,680 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. [2022-07-22 22:01:12,704 INFO L132 encePairwiseOnDemand]: 187/209 looper letters, 355 selfloop transitions, 356 changer transitions 6/1049 dead transitions. [2022-07-22 22:01:12,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1049 transitions, 12303 flow [2022-07-22 22:01:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 22:01:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 22:01:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5183 transitions. [2022-07-22 22:01:12,708 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266347687400319 [2022-07-22 22:01:12,708 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5183 transitions. [2022-07-22 22:01:12,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5183 transitions. [2022-07-22 22:01:12,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:01:12,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5183 transitions. [2022-07-22 22:01:12,714 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) [2022-07-22 22:01:12,719 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) [2022-07-22 22:01:12,719 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) [2022-07-22 22:01:12,719 INFO L186 Difference]: Start difference. First operand has 450 places, 678 transitions, 6378 flow. Second operand 30 states and 5183 transitions. [2022-07-22 22:01:12,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1049 transitions, 12303 flow [2022-07-22 22:01:13,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 1049 transitions, 11524 flow, removed 297 selfloop flow, removed 6 redundant places. [2022-07-22 22:01:13,215 INFO L242 Difference]: Finished difference. Result has 488 places, 899 transitions, 10454 flow [2022-07-22 22:01:13,216 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} [2022-07-22 22:01:13,216 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 301 predicate places. [2022-07-22 22:01:13,216 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 899 transitions, 10454 flow [2022-07-22 22:01:13,217 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) [2022-07-22 22:01:13,217 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:13,217 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] [2022-07-22 22:01:13,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:13,435 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 [2022-07-22 22:01:13,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash -936643847, now seen corresponding path program 1 times [2022-07-22 22:01:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:13,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769917367] [2022-07-22 22:01:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:13,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:13,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769917367] [2022-07-22 22:01:13,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769917367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:13,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873083200] [2022-07-22 22:01:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:13,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:13,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:13,605 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) [2022-07-22 22:01:13,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 22:01:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 22:01:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:14,383 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-22 22:01:14,383 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 [2022-07-22 22:01:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:14,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:01:14,929 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 22:01:14,929 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 [2022-07-22 22:01:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:15,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873083200] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:01:15,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:01:15,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 22] total 46 [2022-07-22 22:01:15,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111312586] [2022-07-22 22:01:15,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:01:15,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 22:01:15,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 22:01:15,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 22:01:15,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 209 [2022-07-22 22:01:15,805 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) [2022-07-22 22:01:15,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:15,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 209 [2022-07-22 22:01:15,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:01:41,761 INFO L129 PetriNetUnfolder]: 27328/58132 cut-off events. [2022-07-22 22:01:41,761 INFO L130 PetriNetUnfolder]: For 433057/433749 co-relation queries the response was YES. [2022-07-22 22:01:43,854 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. [2022-07-22 22:01:44,061 INFO L132 encePairwiseOnDemand]: 151/209 looper letters, 1641 selfloop transitions, 619 changer transitions 297/2763 dead transitions. [2022-07-22 22:01:44,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 2763 transitions, 29146 flow [2022-07-22 22:01:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-07-22 22:01:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2022-07-22 22:01:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 15909 transitions. [2022-07-22 22:01:44,080 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4349692412850308 [2022-07-22 22:01:44,081 INFO L72 ComplementDD]: Start complementDD. Operand 175 states and 15909 transitions. [2022-07-22 22:01:44,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 15909 transitions. [2022-07-22 22:01:44,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:01:44,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 175 states and 15909 transitions. [2022-07-22 22:01:44,101 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) [2022-07-22 22:01:44,126 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) [2022-07-22 22:01:44,131 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) [2022-07-22 22:01:44,132 INFO L186 Difference]: Start difference. First operand has 488 places, 899 transitions, 10454 flow. Second operand 175 states and 15909 transitions. [2022-07-22 22:01:44,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 2763 transitions, 29146 flow [2022-07-22 22:01:50,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 2763 transitions, 27857 flow, removed 504 selfloop flow, removed 7 redundant places. [2022-07-22 22:01:50,873 INFO L242 Difference]: Finished difference. Result has 787 places, 1341 transitions, 15808 flow [2022-07-22 22:01:50,874 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} [2022-07-22 22:01:50,874 INFO L279 CegarLoopForPetriNet]: 187 programPoint places, 600 predicate places. [2022-07-22 22:01:50,874 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 1341 transitions, 15808 flow [2022-07-22 22:01:50,875 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) [2022-07-22 22:01:50,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:50,875 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] [2022-07-22 22:01:50,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:51,086 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 [2022-07-22 22:01:51,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1868961211, now seen corresponding path program 2 times [2022-07-22 22:01:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40357960] [2022-07-22 22:01:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:51,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:01:51,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40357960] [2022-07-22 22:01:51,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40357960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86143923] [2022-07-22 22:01:51,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:01:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:51,264 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) [2022-07-22 22:01:51,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 22:01:51,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:01:51,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:01:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 22:01:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:52,155 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-22 22:01:52,155 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 [2022-07-22 22:01:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:52,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:01:52,486 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 22:01:52,486 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 [2022-07-22 22:01:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:53,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86143923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:01:53,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:01:53,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 21] total 46 [2022-07-22 22:01:53,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704079465] [2022-07-22 22:01:53,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:01:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 22:01:53,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 22:01:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 22:01:53,300 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 209 [2022-07-22 22:01:53,302 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) [2022-07-22 22:01:53,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:53,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 209 [2022-07-22 22:01:53,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand