./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:22:53,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:22:53,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:22:53,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:22:53,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:22:53,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:22:53,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:22:53,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:22:53,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:22:53,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:22:53,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:22:53,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:22:53,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:22:53,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:22:53,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:22:53,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:22:53,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:22:53,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:22:53,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:22:53,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:22:53,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:22:53,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:22:53,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:22:53,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:22:53,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:22:53,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:22:53,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:22:53,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:22:53,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:22:53,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:22:53,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:22:53,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:22:53,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:22:53,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:22:53,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:22:53,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:22:53,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:22:53,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:22:53,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:22:53,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:22:53,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:22:53,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:22:53,491 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:22:53,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:22:53,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:22:53,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:22:53,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:22:53,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:22:53,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:22:53,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:22:53,495 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:22:53,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:22:53,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:22:53,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:22:53,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:22:53,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:22:53,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:22:53,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:22:53,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:22:53,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:22:53,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:22:53,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:22:53,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:22:53,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:22:53,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:22:53,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:22:53,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:22:53,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:22:53,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:22:53,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:22:53,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:22:53,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:22:53,501 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:22:53,502 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:22:53,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:22:53,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:22:53,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2021-12-21 15:22:53,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:22:53,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:22:53,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:22:53,772 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:22:53,772 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:22:53,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-21 15:22:53,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f893d43f8/2dbc97f36bde43ce8ebcd45e147707e1/FLAG1b182c965 [2021-12-21 15:22:54,227 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:22:54,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-21 15:22:54,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f893d43f8/2dbc97f36bde43ce8ebcd45e147707e1/FLAG1b182c965 [2021-12-21 15:22:54,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f893d43f8/2dbc97f36bde43ce8ebcd45e147707e1 [2021-12-21 15:22:54,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:22:54,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:22:54,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:22:54,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:22:54,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:22:54,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ec6888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54, skipping insertion in model container [2021-12-21 15:22:54,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:22:54,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:22:54,848 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-21 15:22:54,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:22:54,856 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:22:54,873 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-21 15:22:54,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:22:54,886 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:22:54,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54 WrapperNode [2021-12-21 15:22:54,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:22:54,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:22:54,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:22:54,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:22:54,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,925 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2021-12-21 15:22:54,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:22:54,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:22:54,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:22:54,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:22:54,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:22:54,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:22:54,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:22:54,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:22:54,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (1/1) ... [2021-12-21 15:22:54,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:22:54,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:54,999 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) [2021-12-21 15:22:55,006 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 [2021-12-21 15:22:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:22:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:22:55,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:22:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:22:55,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:22:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:22:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:22:55,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:22:55,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:22:55,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:22:55,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:22:55,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:22:55,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:22:55,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:22:55,049 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:22:55,166 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:22:55,168 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:22:55,397 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:22:55,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:22:55,442 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:22:55,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:22:55 BoogieIcfgContainer [2021-12-21 15:22:55,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:22:55,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:22:55,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:22:55,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:22:55,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:22:54" (1/3) ... [2021-12-21 15:22:55,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673b2915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:22:55, skipping insertion in model container [2021-12-21 15:22:55,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:22:54" (2/3) ... [2021-12-21 15:22:55,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673b2915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:22:55, skipping insertion in model container [2021-12-21 15:22:55,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:22:55" (3/3) ... [2021-12-21 15:22:55,455 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2021-12-21 15:22:55,460 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:22:55,461 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:22:55,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:22:55,461 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:22:55,518 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,519 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,519 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,520 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,520 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,522 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,523 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,524 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,524 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,524 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,526 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,527 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,528 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,529 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,531 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,531 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,531 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,532 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,532 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,533 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,535 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,535 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,537 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,538 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,546 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,546 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,547 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,547 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,547 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,551 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,551 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,551 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,552 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,552 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:22:55,559 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:22:55,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:22:55,619 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:22:55,619 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:22:55,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2021-12-21 15:22:55,700 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2021-12-21 15:22:55,700 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:22:55,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-21 15:22:55,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2021-12-21 15:22:55,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2021-12-21 15:22:55,766 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-21 15:22:55,768 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:22:55,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:55,769 INFO L254 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] [2021-12-21 15:22:55,770 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:22:55,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2021-12-21 15:22:55,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:55,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104103472] [2021-12-21 15:22:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:55,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:56,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:56,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104103472] [2021-12-21 15:22:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104103472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:56,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:56,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:22:56,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588169775] [2021-12-21 15:22:56,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:56,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:22:56,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:22:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:22:56,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2021-12-21 15:22:56,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:56,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2021-12-21 15:22:56,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:56,130 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2021-12-21 15:22:56,132 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2021-12-21 15:22:56,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2021-12-21 15:22:56,135 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2021-12-21 15:22:56,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2021-12-21 15:22:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:22:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:22:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2021-12-21 15:22:56,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2021-12-21 15:22:56,148 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2021-12-21 15:22:56,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2021-12-21 15:22:56,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:56,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2021-12-21 15:22:56,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,163 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,165 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2021-12-21 15:22:56,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2021-12-21 15:22:56,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:22:56,177 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2021-12-21 15:22:56,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2021-12-21 15:22:56,183 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2021-12-21 15:22:56,183 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2021-12-21 15:22:56,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:56,184 INFO L254 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] [2021-12-21 15:22:56,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:22:56,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:22:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:56,186 INFO L85 PathProgramCache]: Analyzing trace with hash -305653797, now seen corresponding path program 1 times [2021-12-21 15:22:56,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:56,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679874864] [2021-12-21 15:22:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:56,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:56,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:56,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679874864] [2021-12-21 15:22:56,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679874864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:22:56,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:22:56,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:22:56,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689931733] [2021-12-21 15:22:56,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:22:56,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:22:56,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:22:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:22:56,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2021-12-21 15:22:56,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:56,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2021-12-21 15:22:56,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:56,546 INFO L129 PetriNetUnfolder]: 41/148 cut-off events. [2021-12-21 15:22:56,547 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-21 15:22:56,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 148 events. 41/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 13 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2021-12-21 15:22:56,550 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2021-12-21 15:22:56,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 213 flow [2021-12-21 15:22:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:22:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:22:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2021-12-21 15:22:56,558 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2021-12-21 15:22:56,559 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2021-12-21 15:22:56,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2021-12-21 15:22:56,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:56,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2021-12-21 15:22:56,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,567 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,567 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 366 transitions. [2021-12-21 15:22:56,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 213 flow [2021-12-21 15:22:56,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:22:56,570 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2021-12-21 15:22:56,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2021-12-21 15:22:56,572 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2021-12-21 15:22:56,572 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2021-12-21 15:22:56,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:56,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:56,573 INFO L254 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] [2021-12-21 15:22:56,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:22:56,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:22:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -443057429, now seen corresponding path program 1 times [2021-12-21 15:22:56,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:56,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516118988] [2021-12-21 15:22:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:56,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:56,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516118988] [2021-12-21 15:22:56,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516118988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749813734] [2021-12-21 15:22:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:56,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:56,690 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) [2021-12-21 15:22:56,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:22:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:56,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 15:22:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:56,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:57,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749813734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:57,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:57,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 15:22:57,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821781984] [2021-12-21 15:22:57,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:57,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:22:57,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:22:57,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:22:57,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2021-12-21 15:22:57,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:57,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:57,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2021-12-21 15:22:57,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:22:57,358 INFO L129 PetriNetUnfolder]: 27/138 cut-off events. [2021-12-21 15:22:57,359 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-12-21 15:22:57,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 138 events. 27/138 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 357 event pairs, 5 based on Foata normal form. 4/136 useless extension candidates. Maximal degree in co-relation 221. Up to 25 conditions per place. [2021-12-21 15:22:57,361 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 19 selfloop transitions, 7 changer transitions 2/83 dead transitions. [2021-12-21 15:22:57,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 254 flow [2021-12-21 15:22:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:22:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:22:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2021-12-21 15:22:57,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441860465116279 [2021-12-21 15:22:57,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2021-12-21 15:22:57,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2021-12-21 15:22:57,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:22:57,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2021-12-21 15:22:57,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:57,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:57,368 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:57,368 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 5 states and 363 transitions. [2021-12-21 15:22:57,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 254 flow [2021-12-21 15:22:57,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:22:57,372 INFO L242 Difference]: Finished difference. Result has 81 places, 76 transitions, 212 flow [2021-12-21 15:22:57,373 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2021-12-21 15:22:57,375 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2021-12-21 15:22:57,375 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 212 flow [2021-12-21 15:22:57,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:57,376 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:22:57,376 INFO L254 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] [2021-12-21 15:22:57,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:22:57,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:57,600 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:22:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:22:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1484029817, now seen corresponding path program 1 times [2021-12-21 15:22:57,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:22:57,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424218089] [2021-12-21 15:22:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:57,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:22:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:57,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:22:57,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424218089] [2021-12-21 15:22:57,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424218089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:22:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871989795] [2021-12-21 15:22:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:22:57,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:22:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:22:57,964 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) [2021-12-21 15:22:57,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:22:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:22:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:22:58,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:22:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:58,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:22:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:22:59,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871989795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:22:59,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:22:59,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-21 15:22:59,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761902311] [2021-12-21 15:22:59,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:22:59,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:22:59,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:22:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:22:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:22:59,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:22:59,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 212 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:22:59,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:22:59,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:22:59,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:01,401 INFO L129 PetriNetUnfolder]: 260/787 cut-off events. [2021-12-21 15:23:01,402 INFO L130 PetriNetUnfolder]: For 564/572 co-relation queries the response was YES. [2021-12-21 15:23:01,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 787 events. 260/787 cut-off events. For 564/572 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4626 event pairs, 6 based on Foata normal form. 7/754 useless extension candidates. Maximal degree in co-relation 2076. Up to 143 conditions per place. [2021-12-21 15:23:01,409 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 112 selfloop transitions, 121 changer transitions 53/327 dead transitions. [2021-12-21 15:23:01,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 327 transitions, 1946 flow [2021-12-21 15:23:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-21 15:23:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-21 15:23:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3152 transitions. [2021-12-21 15:23:01,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430028559771522 [2021-12-21 15:23:01,417 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3152 transitions. [2021-12-21 15:23:01,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3152 transitions. [2021-12-21 15:23:01,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:01,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3152 transitions. [2021-12-21 15:23:01,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.29824561403509) internal successors, (3152), 57 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:01,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:01,435 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:01,436 INFO L186 Difference]: Start difference. First operand has 81 places, 76 transitions, 212 flow. Second operand 57 states and 3152 transitions. [2021-12-21 15:23:01,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 327 transitions, 1946 flow [2021-12-21 15:23:01,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 327 transitions, 1946 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:23:01,453 INFO L242 Difference]: Finished difference. Result has 168 places, 203 transitions, 1379 flow [2021-12-21 15:23:01,453 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1379, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2021-12-21 15:23:01,454 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2021-12-21 15:23:01,455 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 1379 flow [2021-12-21 15:23:01,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:01,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:01,456 INFO L254 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] [2021-12-21 15:23:01,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:01,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 15:23:01,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1760521617, now seen corresponding path program 2 times [2021-12-21 15:23:01,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544073293] [2021-12-21 15:23:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:01,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:01,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544073293] [2021-12-21 15:23:01,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544073293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513876781] [2021-12-21 15:23:01,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:23:01,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:01,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:01,964 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) [2021-12-21 15:23:01,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:23:02,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:23:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:02,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:02,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:03,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513876781] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:03,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:03,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-21 15:23:03,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231060272] [2021-12-21 15:23:03,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:03,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:23:03,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:03,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:23:03,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:23:03,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:03,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 1379 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:03,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:03,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:03,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:06,247 INFO L129 PetriNetUnfolder]: 347/1098 cut-off events. [2021-12-21 15:23:06,247 INFO L130 PetriNetUnfolder]: For 3000/3000 co-relation queries the response was YES. [2021-12-21 15:23:06,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 1098 events. 347/1098 cut-off events. For 3000/3000 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7229 event pairs, 15 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 4224. Up to 224 conditions per place. [2021-12-21 15:23:06,261 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 136 selfloop transitions, 230 changer transitions 34/441 dead transitions. [2021-12-21 15:23:06,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 441 transitions, 4005 flow [2021-12-21 15:23:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-21 15:23:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-12-21 15:23:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4115 transitions. [2021-12-21 15:23:06,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.637984496124031 [2021-12-21 15:23:06,272 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4115 transitions. [2021-12-21 15:23:06,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4115 transitions. [2021-12-21 15:23:06,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:06,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4115 transitions. [2021-12-21 15:23:06,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 54.86666666666667) internal successors, (4115), 75 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:06,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:06,297 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:06,297 INFO L186 Difference]: Start difference. First operand has 168 places, 203 transitions, 1379 flow. Second operand 75 states and 4115 transitions. [2021-12-21 15:23:06,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 441 transitions, 4005 flow [2021-12-21 15:23:06,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 3689 flow, removed 158 selfloop flow, removed 14 redundant places. [2021-12-21 15:23:06,330 INFO L242 Difference]: Finished difference. Result has 230 places, 332 transitions, 3004 flow [2021-12-21 15:23:06,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=3004, PETRI_PLACES=230, PETRI_TRANSITIONS=332} [2021-12-21 15:23:06,332 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 154 predicate places. [2021-12-21 15:23:06,332 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 332 transitions, 3004 flow [2021-12-21 15:23:06,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:06,333 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:06,333 INFO L254 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] [2021-12-21 15:23:06,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:06,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:06,555 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1200502709, now seen corresponding path program 3 times [2021-12-21 15:23:06,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:06,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792674420] [2021-12-21 15:23:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:06,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:06,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:06,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792674420] [2021-12-21 15:23:06,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792674420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:06,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828883576] [2021-12-21 15:23:06,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:23:06,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:06,777 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) [2021-12-21 15:23:06,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:23:06,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:23:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:06,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:07,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:08,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828883576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:08,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:08,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-21 15:23:08,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619604171] [2021-12-21 15:23:08,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:08,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 15:23:08,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 15:23:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-12-21 15:23:08,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:08,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 332 transitions, 3004 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:08,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:08,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:08,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:10,768 INFO L129 PetriNetUnfolder]: 544/1748 cut-off events. [2021-12-21 15:23:10,768 INFO L130 PetriNetUnfolder]: For 7138/7157 co-relation queries the response was YES. [2021-12-21 15:23:10,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 1748 events. 544/1748 cut-off events. For 7138/7157 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13271 event pairs, 31 based on Foata normal form. 9/1751 useless extension candidates. Maximal degree in co-relation 7890. Up to 483 conditions per place. [2021-12-21 15:23:10,789 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 255 selfloop transitions, 331 changer transitions 37/664 dead transitions. [2021-12-21 15:23:10,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 664 transitions, 7611 flow [2021-12-21 15:23:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-21 15:23:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-21 15:23:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3363 transitions. [2021-12-21 15:23:10,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410598551277163 [2021-12-21 15:23:10,796 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3363 transitions. [2021-12-21 15:23:10,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3363 transitions. [2021-12-21 15:23:10,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:10,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3363 transitions. [2021-12-21 15:23:10,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 55.131147540983605) internal successors, (3363), 61 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:10,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:10,817 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:10,817 INFO L186 Difference]: Start difference. First operand has 230 places, 332 transitions, 3004 flow. Second operand 61 states and 3363 transitions. [2021-12-21 15:23:10,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 664 transitions, 7611 flow [2021-12-21 15:23:10,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 664 transitions, 7140 flow, removed 138 selfloop flow, removed 20 redundant places. [2021-12-21 15:23:10,892 INFO L242 Difference]: Finished difference. Result has 299 places, 542 transitions, 6409 flow [2021-12-21 15:23:10,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6409, PETRI_PLACES=299, PETRI_TRANSITIONS=542} [2021-12-21 15:23:10,893 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 223 predicate places. [2021-12-21 15:23:10,894 INFO L470 AbstractCegarLoop]: Abstraction has has 299 places, 542 transitions, 6409 flow [2021-12-21 15:23:10,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:10,894 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:10,895 INFO L254 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] [2021-12-21 15:23:10,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:11,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:11,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash -596230533, now seen corresponding path program 4 times [2021-12-21 15:23:11,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:11,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839278750] [2021-12-21 15:23:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:11,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:11,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:11,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839278750] [2021-12-21 15:23:11,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839278750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:11,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104038271] [2021-12-21 15:23:11,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:23:11,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:11,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:11,376 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) [2021-12-21 15:23:11,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:23:11,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:23:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:11,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:12,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104038271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:12,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:12,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-21 15:23:12,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901433013] [2021-12-21 15:23:12,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:12,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 15:23:12,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 15:23:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-21 15:23:12,421 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:12,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 542 transitions, 6409 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:12,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:12,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:12,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:15,639 INFO L129 PetriNetUnfolder]: 757/2442 cut-off events. [2021-12-21 15:23:15,639 INFO L130 PetriNetUnfolder]: For 18516/18567 co-relation queries the response was YES. [2021-12-21 15:23:15,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 2442 events. 757/2442 cut-off events. For 18516/18567 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20302 event pairs, 59 based on Foata normal form. 11/2447 useless extension candidates. Maximal degree in co-relation 13254. Up to 786 conditions per place. [2021-12-21 15:23:15,676 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 342 selfloop transitions, 462 changer transitions 48/893 dead transitions. [2021-12-21 15:23:15,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 893 transitions, 12607 flow [2021-12-21 15:23:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-21 15:23:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-21 15:23:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3585 transitions. [2021-12-21 15:23:15,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413237924865832 [2021-12-21 15:23:15,682 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3585 transitions. [2021-12-21 15:23:15,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3585 transitions. [2021-12-21 15:23:15,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:15,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3585 transitions. [2021-12-21 15:23:15,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.15384615384615) internal successors, (3585), 65 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:15,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:15,715 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:15,715 INFO L186 Difference]: Start difference. First operand has 299 places, 542 transitions, 6409 flow. Second operand 65 states and 3585 transitions. [2021-12-21 15:23:15,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 893 transitions, 12607 flow [2021-12-21 15:23:15,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 893 transitions, 12293 flow, removed 152 selfloop flow, removed 9 redundant places. [2021-12-21 15:23:15,916 INFO L242 Difference]: Finished difference. Result has 387 places, 757 transitions, 11210 flow [2021-12-21 15:23:15,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11210, PETRI_PLACES=387, PETRI_TRANSITIONS=757} [2021-12-21 15:23:15,918 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 311 predicate places. [2021-12-21 15:23:15,918 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 757 transitions, 11210 flow [2021-12-21 15:23:15,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:15,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:15,919 INFO L254 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] [2021-12-21 15:23:15,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:16,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:16,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1699910441, now seen corresponding path program 5 times [2021-12-21 15:23:16,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:16,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931852101] [2021-12-21 15:23:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:16,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:16,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:16,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931852101] [2021-12-21 15:23:16,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931852101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:16,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262296362] [2021-12-21 15:23:16,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:23:16,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:16,372 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) [2021-12-21 15:23:16,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:23:16,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:23:16,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:16,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:17,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262296362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:17,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:17,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-21 15:23:17,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141236792] [2021-12-21 15:23:17,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:17,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:23:17,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:23:17,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:23:17,491 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:17,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 757 transitions, 11210 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:17,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:17,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:17,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:21,206 INFO L129 PetriNetUnfolder]: 792/2558 cut-off events. [2021-12-21 15:23:21,207 INFO L130 PetriNetUnfolder]: For 32950/32974 co-relation queries the response was YES. [2021-12-21 15:23:21,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16678 conditions, 2558 events. 792/2558 cut-off events. For 32950/32974 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21500 event pairs, 25 based on Foata normal form. 7/2563 useless extension candidates. Maximal degree in co-relation 16564. Up to 504 conditions per place. [2021-12-21 15:23:21,260 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 232 selfloop transitions, 633 changer transitions 38/944 dead transitions. [2021-12-21 15:23:21,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 944 transitions, 15762 flow [2021-12-21 15:23:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-21 15:23:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-21 15:23:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4176 transitions. [2021-12-21 15:23:21,270 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6389228886168911 [2021-12-21 15:23:21,270 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4176 transitions. [2021-12-21 15:23:21,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4176 transitions. [2021-12-21 15:23:21,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:21,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4176 transitions. [2021-12-21 15:23:21,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.94736842105263) internal successors, (4176), 76 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:21,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:21,287 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:21,287 INFO L186 Difference]: Start difference. First operand has 387 places, 757 transitions, 11210 flow. Second operand 76 states and 4176 transitions. [2021-12-21 15:23:21,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 944 transitions, 15762 flow [2021-12-21 15:23:21,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 944 transitions, 15182 flow, removed 285 selfloop flow, removed 8 redundant places. [2021-12-21 15:23:21,630 INFO L242 Difference]: Finished difference. Result has 456 places, 822 transitions, 13352 flow [2021-12-21 15:23:21,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=13352, PETRI_PLACES=456, PETRI_TRANSITIONS=822} [2021-12-21 15:23:21,632 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 380 predicate places. [2021-12-21 15:23:21,632 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 822 transitions, 13352 flow [2021-12-21 15:23:21,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:21,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:21,633 INFO L254 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] [2021-12-21 15:23:21,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:21,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:21,833 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash 351983375, now seen corresponding path program 6 times [2021-12-21 15:23:21,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:21,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759134422] [2021-12-21 15:23:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:21,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:22,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759134422] [2021-12-21 15:23:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759134422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056097500] [2021-12-21 15:23:22,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:23:22,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:22,050 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) [2021-12-21 15:23:22,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:23:22,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-21 15:23:22,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:22,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:23,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056097500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:23,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-21 15:23:23,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748392798] [2021-12-21 15:23:23,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:23,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 15:23:23,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 15:23:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-21 15:23:23,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:23,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 822 transitions, 13352 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:23,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:23,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:23,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:26,319 INFO L129 PetriNetUnfolder]: 907/3024 cut-off events. [2021-12-21 15:23:26,320 INFO L130 PetriNetUnfolder]: For 48445/48480 co-relation queries the response was YES. [2021-12-21 15:23:26,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 3024 events. 907/3024 cut-off events. For 48445/48480 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26809 event pairs, 100 based on Foata normal form. 5/3019 useless extension candidates. Maximal degree in co-relation 20828. Up to 1057 conditions per place. [2021-12-21 15:23:26,364 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 421 selfloop transitions, 567 changer transitions 50/1079 dead transitions. [2021-12-21 15:23:26,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1079 transitions, 19817 flow [2021-12-21 15:23:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 15:23:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-21 15:23:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3529 transitions. [2021-12-21 15:23:26,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6411700581395349 [2021-12-21 15:23:26,370 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3529 transitions. [2021-12-21 15:23:26,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3529 transitions. [2021-12-21 15:23:26,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:26,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3529 transitions. [2021-12-21 15:23:26,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.140625) internal successors, (3529), 64 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:26,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:26,383 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:26,383 INFO L186 Difference]: Start difference. First operand has 456 places, 822 transitions, 13352 flow. Second operand 64 states and 3529 transitions. [2021-12-21 15:23:26,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1079 transitions, 19817 flow [2021-12-21 15:23:26,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1079 transitions, 18789 flow, removed 174 selfloop flow, removed 40 redundant places. [2021-12-21 15:23:26,816 INFO L242 Difference]: Finished difference. Result has 497 places, 944 transitions, 17074 flow [2021-12-21 15:23:26,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=12570, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17074, PETRI_PLACES=497, PETRI_TRANSITIONS=944} [2021-12-21 15:23:26,817 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 421 predicate places. [2021-12-21 15:23:26,818 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 944 transitions, 17074 flow [2021-12-21 15:23:26,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:26,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:26,819 INFO L254 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] [2021-12-21 15:23:26,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 15:23:27,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:27,031 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash -381220039, now seen corresponding path program 7 times [2021-12-21 15:23:27,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:27,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635549461] [2021-12-21 15:23:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:27,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:27,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:27,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635549461] [2021-12-21 15:23:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635549461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077971878] [2021-12-21 15:23:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 15:23:27,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:27,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:27,235 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) [2021-12-21 15:23:27,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:23:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:27,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:28,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077971878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:28,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:28,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-21 15:23:28,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255676206] [2021-12-21 15:23:28,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:28,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:23:28,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:23:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:23:28,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:28,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 944 transitions, 17074 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:28,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:28,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:28,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:32,396 INFO L129 PetriNetUnfolder]: 1130/3900 cut-off events. [2021-12-21 15:23:32,397 INFO L130 PetriNetUnfolder]: For 95550/95585 co-relation queries the response was YES. [2021-12-21 15:23:32,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29889 conditions, 3900 events. 1130/3900 cut-off events. For 95550/95585 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 37369 event pairs, 45 based on Foata normal form. 14/3910 useless extension candidates. Maximal degree in co-relation 29750. Up to 766 conditions per place. [2021-12-21 15:23:32,466 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 446 selfloop transitions, 830 changer transitions 31/1348 dead transitions. [2021-12-21 15:23:32,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1348 transitions, 27580 flow [2021-12-21 15:23:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-21 15:23:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-21 15:23:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4259 transitions. [2021-12-21 15:23:32,471 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6431591664149804 [2021-12-21 15:23:32,471 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4259 transitions. [2021-12-21 15:23:32,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4259 transitions. [2021-12-21 15:23:32,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:32,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4259 transitions. [2021-12-21 15:23:32,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.311688311688314) internal successors, (4259), 77 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:32,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:32,489 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:32,489 INFO L186 Difference]: Start difference. First operand has 497 places, 944 transitions, 17074 flow. Second operand 77 states and 4259 transitions. [2021-12-21 15:23:32,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1348 transitions, 27580 flow [2021-12-21 15:23:33,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1348 transitions, 26329 flow, removed 525 selfloop flow, removed 28 redundant places. [2021-12-21 15:23:33,398 INFO L242 Difference]: Finished difference. Result has 562 places, 1159 transitions, 23296 flow [2021-12-21 15:23:33,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=16312, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=23296, PETRI_PLACES=562, PETRI_TRANSITIONS=1159} [2021-12-21 15:23:33,400 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 486 predicate places. [2021-12-21 15:23:33,400 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 1159 transitions, 23296 flow [2021-12-21 15:23:33,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:33,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:33,401 INFO L254 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] [2021-12-21 15:23:33,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:33,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 15:23:33,625 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1766817381, now seen corresponding path program 8 times [2021-12-21 15:23:33,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:33,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991194051] [2021-12-21 15:23:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:33,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:33,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:33,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991194051] [2021-12-21 15:23:33,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991194051] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:33,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548617309] [2021-12-21 15:23:33,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:23:33,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:33,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:33,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:23:33,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 15:23:33,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:23:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:34,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:34,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548617309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:34,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:34,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-21 15:23:34,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285334455] [2021-12-21 15:23:34,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:34,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:23:34,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:23:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:23:34,753 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:34,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1159 transitions, 23296 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:34,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:34,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:34,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:38,944 INFO L129 PetriNetUnfolder]: 1131/3759 cut-off events. [2021-12-21 15:23:38,944 INFO L130 PetriNetUnfolder]: For 115420/115455 co-relation queries the response was YES. [2021-12-21 15:23:38,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31640 conditions, 3759 events. 1131/3759 cut-off events. For 115420/115455 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35156 event pairs, 68 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 31500. Up to 766 conditions per place. [2021-12-21 15:23:39,017 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 325 selfloop transitions, 876 changer transitions 46/1288 dead transitions. [2021-12-21 15:23:39,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1288 transitions, 27966 flow [2021-12-21 15:23:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-21 15:23:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-21 15:23:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4384 transitions. [2021-12-21 15:23:39,027 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2021-12-21 15:23:39,027 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4384 transitions. [2021-12-21 15:23:39,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4384 transitions. [2021-12-21 15:23:39,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:39,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4384 transitions. [2021-12-21 15:23:39,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 54.8) internal successors, (4384), 80 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:39,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:39,060 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:39,060 INFO L186 Difference]: Start difference. First operand has 562 places, 1159 transitions, 23296 flow. Second operand 80 states and 4384 transitions. [2021-12-21 15:23:39,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1288 transitions, 27966 flow [2021-12-21 15:23:40,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1288 transitions, 26972 flow, removed 325 selfloop flow, removed 32 redundant places. [2021-12-21 15:23:40,173 INFO L242 Difference]: Finished difference. Result has 610 places, 1153 transitions, 24222 flow [2021-12-21 15:23:40,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22503, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=24222, PETRI_PLACES=610, PETRI_TRANSITIONS=1153} [2021-12-21 15:23:40,175 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 534 predicate places. [2021-12-21 15:23:40,175 INFO L470 AbstractCegarLoop]: Abstraction has has 610 places, 1153 transitions, 24222 flow [2021-12-21 15:23:40,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:40,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:40,176 INFO L254 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] [2021-12-21 15:23:40,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:40,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:40,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:40,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1296723879, now seen corresponding path program 9 times [2021-12-21 15:23:40,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:40,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248670591] [2021-12-21 15:23:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:40,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:40,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:40,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248670591] [2021-12-21 15:23:40,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248670591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:40,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265683229] [2021-12-21 15:23:40,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:23:40,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:40,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:40,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:23:40,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 15:23:40,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 15:23:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:41,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:41,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265683229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:41,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:41,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-21 15:23:41,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107940252] [2021-12-21 15:23:41,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:41,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:23:41,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:23:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:23:41,730 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:41,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1153 transitions, 24222 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:41,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:41,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:41,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:45,306 INFO L129 PetriNetUnfolder]: 1389/4472 cut-off events. [2021-12-21 15:23:45,306 INFO L130 PetriNetUnfolder]: For 142331/142366 co-relation queries the response was YES. [2021-12-21 15:23:45,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39489 conditions, 4472 events. 1389/4472 cut-off events. For 142331/142366 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43173 event pairs, 96 based on Foata normal form. 8/4464 useless extension candidates. Maximal degree in co-relation 39351. Up to 1427 conditions per place. [2021-12-21 15:23:45,403 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 450 selfloop transitions, 1094 changer transitions 23/1608 dead transitions. [2021-12-21 15:23:45,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1608 transitions, 37635 flow [2021-12-21 15:23:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-21 15:23:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-21 15:23:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3184 transitions. [2021-12-21 15:23:45,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383319967923016 [2021-12-21 15:23:45,407 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3184 transitions. [2021-12-21 15:23:45,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3184 transitions. [2021-12-21 15:23:45,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:45,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3184 transitions. [2021-12-21 15:23:45,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.89655172413793) internal successors, (3184), 58 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:45,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:45,419 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:45,419 INFO L186 Difference]: Start difference. First operand has 610 places, 1153 transitions, 24222 flow. Second operand 58 states and 3184 transitions. [2021-12-21 15:23:45,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1608 transitions, 37635 flow [2021-12-21 15:23:46,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1608 transitions, 35381 flow, removed 57 selfloop flow, removed 69 redundant places. [2021-12-21 15:23:46,648 INFO L242 Difference]: Finished difference. Result has 600 places, 1498 transitions, 34421 flow [2021-12-21 15:23:46,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22585, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=34421, PETRI_PLACES=600, PETRI_TRANSITIONS=1498} [2021-12-21 15:23:46,649 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 524 predicate places. [2021-12-21 15:23:46,650 INFO L470 AbstractCegarLoop]: Abstraction has has 600 places, 1498 transitions, 34421 flow [2021-12-21 15:23:46,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:46,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:46,650 INFO L254 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] [2021-12-21 15:23:46,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:46,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 15:23:46,851 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944037, now seen corresponding path program 10 times [2021-12-21 15:23:46,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:46,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113691116] [2021-12-21 15:23:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:46,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:47,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113691116] [2021-12-21 15:23:47,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113691116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039442760] [2021-12-21 15:23:47,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:23:47,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:47,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:47,060 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:23:47,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 15:23:47,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:23:47,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:23:47,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:47,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:47,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039442760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:47,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:47,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-21 15:23:47,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546645235] [2021-12-21 15:23:47,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:47,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:23:47,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:23:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:23:47,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-21 15:23:47,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1498 transitions, 34421 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:47,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:47,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-21 15:23:47,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand