./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:41:41,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:41:41,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:41:41,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:41:41,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:41:41,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:41:41,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:41:41,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:41:41,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:41:41,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:41:41,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:41:41,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:41:41,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:41:41,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:41:41,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:41:41,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:41:41,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:41:41,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:41:41,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:41:41,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:41:41,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:41:41,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:41:41,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:41:41,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:41:41,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:41:41,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:41:41,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:41:41,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:41:41,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:41:41,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:41:41,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:41:41,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:41:41,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:41:41,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:41:41,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:41:41,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:41:41,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:41:41,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:41:41,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:41:41,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:41:41,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:41:41,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:41:41,523 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:41:41,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:41:41,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:41:41,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:41:41,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:41:41,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:41:41,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:41:41,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:41:41,527 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:41:41,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:41:41,528 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:41:41,528 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:41:41,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:41:41,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:41:41,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:41:41,529 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:41:41,529 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:41:41,529 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:41:41,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:41:41,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:41:41,530 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:41:41,530 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:41:41,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:41:41,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:41:41,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:41:41,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:41:41,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:41:41,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:41:41,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:41:41,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:41:41,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:41:41,532 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:41:41,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:41:41,533 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:41:41,533 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:41:41,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:41:41,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:41:41,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:41:41,865 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:41:41,866 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:41:41,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 07:41:43,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:41:43,413 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:41:43,414 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 07:41:43,421 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665cc410d/907a9e3bc47a4b8386b8aadf2f8aec59/FLAGec0415cdf [2023-08-30 07:41:43,438 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665cc410d/907a9e3bc47a4b8386b8aadf2f8aec59 [2023-08-30 07:41:43,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:41:43,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:41:43,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:41:43,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:41:43,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:41:43,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:41:43" (1/1) ... [2023-08-30 07:41:43,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a03f368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:43, skipping insertion in model container [2023-08-30 07:41:43,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:41:43" (1/1) ... [2023-08-30 07:41:43,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:41:43,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:41:43,654 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 07:41:43,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:41:43,678 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:41:43,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@226aab8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:43, skipping insertion in model container [2023-08-30 07:41:43,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:41:43,681 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:41:43,683 INFO L158 Benchmark]: Toolchain (without parser) took 239.71ms. Allocated memory is still 69.2MB. Free memory was 44.1MB in the beginning and 34.5MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:41:43,683 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:41:43,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.77ms. Allocated memory is still 69.2MB. Free memory was 43.9MB in the beginning and 34.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:41:43,686 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.77ms. Allocated memory is still 69.2MB. Free memory was 43.9MB in the beginning and 34.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:41:45,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:41:45,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:41:45,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:41:45,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:41:45,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:41:45,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:41:45,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:41:45,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:41:45,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:41:45,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:41:45,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:41:45,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:41:45,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:41:45,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:41:45,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:41:45,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:41:45,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:41:45,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:41:45,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:41:45,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:41:45,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:41:45,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:41:45,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:41:45,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:41:45,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:41:45,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:41:45,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:41:45,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:41:45,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:41:45,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:41:45,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:41:45,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:41:45,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:41:45,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:41:45,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:41:45,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:41:45,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:41:45,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:41:45,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:41:45,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:41:45,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:41:45,494 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:41:45,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:41:45,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:41:45,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:41:45,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:41:45,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:41:45,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:41:45,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:41:45,498 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:41:45,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:41:45,499 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:41:45,499 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:41:45,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:41:45,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:41:45,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:41:45,500 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:41:45,500 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:41:45,500 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:41:45,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:41:45,500 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:41:45,501 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:41:45,501 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:41:45,501 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:41:45,501 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:41:45,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:41:45,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:41:45,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:41:45,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:41:45,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:41:45,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:41:45,503 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:41:45,503 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:41:45,503 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:41:45,503 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:41:45,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:41:45,504 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:41:45,504 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:41:45,504 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:41:45,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:41:45,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:41:45,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:41:45,839 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:41:45,839 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:41:45,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 07:41:47,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:41:47,267 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:41:47,268 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-30 07:41:47,274 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd3509a4/4055ab5f3911420b8d1fb56a50624c1f/FLAG4912cf5d0 [2023-08-30 07:41:47,285 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd3509a4/4055ab5f3911420b8d1fb56a50624c1f [2023-08-30 07:41:47,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:41:47,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:41:47,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:41:47,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:41:47,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:41:47,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db3d408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47, skipping insertion in model container [2023-08-30 07:41:47,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:41:47,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:41:47,531 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 07:41:47,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:41:47,565 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:41:47,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:41:47,596 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 07:41:47,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:41:47,608 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:41:47,641 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-30 07:41:47,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:41:47,663 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:41:47,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47 WrapperNode [2023-08-30 07:41:47,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:41:47,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:41:47,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:41:47,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:41:47,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,723 INFO L138 Inliner]: procedures = 26, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 135 [2023-08-30 07:41:47,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:41:47,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:41:47,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:41:47,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:41:47,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,772 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:41:47,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:41:47,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:41:47,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:41:47,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (1/1) ... [2023-08-30 07:41:47,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:41:47,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:41:47,814 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) [2023-08-30 07:41:47,833 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 [2023-08-30 07:41:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:41:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:41:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:41:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:41:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:41:47,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:41:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:41:47,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:41:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:41:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:41:47,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:41:47,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:41:47,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:41:47,863 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:41:48,000 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:41:48,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:41:48,339 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:41:48,346 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:41:48,347 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:41:48,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:41:48 BoogieIcfgContainer [2023-08-30 07:41:48,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:41:48,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:41:48,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:41:48,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:41:48,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:41:47" (1/3) ... [2023-08-30 07:41:48,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7a660f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:41:48, skipping insertion in model container [2023-08-30 07:41:48,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:41:47" (2/3) ... [2023-08-30 07:41:48,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7a660f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:41:48, skipping insertion in model container [2023-08-30 07:41:48,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:41:48" (3/3) ... [2023-08-30 07:41:48,356 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-08-30 07:41:48,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:41:48,370 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 07:41:48,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:41:48,488 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:41:48,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 175 transitions, 366 flow [2023-08-30 07:41:48,638 INFO L130 PetriNetUnfolder]: 14/173 cut-off events. [2023-08-30 07:41:48,638 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:41:48,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 173 events. 14/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 229 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 07:41:48,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 175 transitions, 366 flow [2023-08-30 07:41:48,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 169 transitions, 350 flow [2023-08-30 07:41:48,659 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:41:48,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 169 transitions, 350 flow [2023-08-30 07:41:48,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 169 transitions, 350 flow [2023-08-30 07:41:48,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 169 transitions, 350 flow [2023-08-30 07:41:48,724 INFO L130 PetriNetUnfolder]: 14/169 cut-off events. [2023-08-30 07:41:48,724 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:41:48,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 07:41:48,730 INFO L119 LiptonReduction]: Number of co-enabled transitions 2778 [2023-08-30 07:42:01,286 INFO L134 LiptonReduction]: Checked pairs total: 2716 [2023-08-30 07:42:01,286 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 07:42:01,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:42:01,308 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67f81248, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:42:01,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-30 07:42:01,310 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:42:01,310 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:42:01,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:01,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:42:01,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:01,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash 21819, now seen corresponding path program 1 times [2023-08-30 07:42:01,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:01,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375643996] [2023-08-30 07:42:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:01,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:01,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:01,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:01,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:42:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:42:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:01,538 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:42:01,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 07:42:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:01,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:01,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:01,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375643996] [2023-08-30 07:42:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375643996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:01,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:01,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:42:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773226301] [2023-08-30 07:42:01,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:42:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:42:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:42:01,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 07:42:01,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:01,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:01,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 07:42:01,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:01,910 INFO L130 PetriNetUnfolder]: 398/569 cut-off events. [2023-08-30 07:42:01,911 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:42:01,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 569 events. 398/569 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2309 event pairs, 184 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 997. Up to 564 conditions per place. [2023-08-30 07:42:01,916 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 07:42:01,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 132 flow [2023-08-30 07:42:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:42:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:42:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-30 07:42:01,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558960074280409 [2023-08-30 07:42:01,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-30 07:42:01,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-30 07:42:01,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:01,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-30 07:42:01,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:01,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:01,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:01,949 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 491 transitions. [2023-08-30 07:42:01,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 132 flow [2023-08-30 07:42:01,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:42:01,959 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 68 flow [2023-08-30 07:42:01,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-30 07:42:01,980 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-30 07:42:01,980 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 68 flow [2023-08-30 07:42:01,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:01,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:01,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:42:02,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 07:42:02,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:02,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:02,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2023-08-30 07:42:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:02,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669576953] [2023-08-30 07:42:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:02,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:02,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:02,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:02,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:42:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:42:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:02,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:02,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669576953] [2023-08-30 07:42:02,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669576953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:02,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:02,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:42:02,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449229037] [2023-08-30 07:42:02,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:02,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:42:02,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:02,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:42:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:42:02,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 359 [2023-08-30 07:42:02,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:02,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:02,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 359 [2023-08-30 07:42:02,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:02,535 INFO L130 PetriNetUnfolder]: 398/571 cut-off events. [2023-08-30 07:42:02,535 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:42:02,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 571 events. 398/571 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2323 event pairs, 184 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 1141. Up to 565 conditions per place. [2023-08-30 07:42:02,539 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-30 07:42:02,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 134 flow [2023-08-30 07:42:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:42:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:42:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 07:42:02,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46332404828226553 [2023-08-30 07:42:02,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 07:42:02,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 07:42:02,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:02,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 07:42:02,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:02,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:02,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:02,551 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 68 flow. Second operand 3 states and 499 transitions. [2023-08-30 07:42:02,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 134 flow [2023-08-30 07:42:02,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:02,553 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 83 flow [2023-08-30 07:42:02,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-30 07:42:02,554 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 07:42:02,554 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 83 flow [2023-08-30 07:42:02,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:02,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:02,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:42:02,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:02,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:02,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:02,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash 21820, now seen corresponding path program 1 times [2023-08-30 07:42:02,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:02,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564365272] [2023-08-30 07:42:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:02,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:02,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:42:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:42:02,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:02,888 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:02,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:02,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:02,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564365272] [2023-08-30 07:42:02,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564365272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:02,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:02,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:42:02,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041223742] [2023-08-30 07:42:02,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:02,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:42:02,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:02,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:42:02,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:42:03,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 07:42:03,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:03,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:03,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 07:42:03,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:03,286 INFO L130 PetriNetUnfolder]: 398/570 cut-off events. [2023-08-30 07:42:03,286 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:42:03,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 570 events. 398/570 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2285 event pairs, 184 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 1145. Up to 565 conditions per place. [2023-08-30 07:42:03,289 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 28 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-30 07:42:03,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 143 flow [2023-08-30 07:42:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:42:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:42:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-30 07:42:03,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45496750232126276 [2023-08-30 07:42:03,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-30 07:42:03,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-30 07:42:03,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:03,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-30 07:42:03,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:03,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:03,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:03,300 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 83 flow. Second operand 3 states and 490 transitions. [2023-08-30 07:42:03,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 143 flow [2023-08-30 07:42:03,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:03,302 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 87 flow [2023-08-30 07:42:03,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-30 07:42:03,303 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-30 07:42:03,304 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 87 flow [2023-08-30 07:42:03,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:03,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:03,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:42:03,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:03,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:03,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:03,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 678212, now seen corresponding path program 1 times [2023-08-30 07:42:03,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:03,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229847913] [2023-08-30 07:42:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:03,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:03,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:03,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:42:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:03,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:42:03,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:42:03,656 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 07:42:03,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 07:42:03,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 07:42:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:03,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:03,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:03,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229847913] [2023-08-30 07:42:03,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229847913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:03,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:03,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:42:03,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152476501] [2023-08-30 07:42:03,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:03,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:42:03,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:42:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:42:03,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 07:42:03,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:03,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:03,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 07:42:03,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:04,132 INFO L130 PetriNetUnfolder]: 304/445 cut-off events. [2023-08-30 07:42:04,132 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:42:04,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 445 events. 304/445 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 1695 event pairs, 139 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 895. Up to 440 conditions per place. [2023-08-30 07:42:04,135 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 07:42:04,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 137 flow [2023-08-30 07:42:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:42:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:42:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-30 07:42:04,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531104921077066 [2023-08-30 07:42:04,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-30 07:42:04,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-30 07:42:04,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:04,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-30 07:42:04,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,143 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 87 flow. Second operand 3 states and 488 transitions. [2023-08-30 07:42:04,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 137 flow [2023-08-30 07:42:04,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:42:04,144 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 79 flow [2023-08-30 07:42:04,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 07:42:04,145 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 07:42:04,145 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 79 flow [2023-08-30 07:42:04,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:04,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:42:04,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:04,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:04,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:04,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 678210, now seen corresponding path program 1 times [2023-08-30 07:42:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345490900] [2023-08-30 07:42:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:04,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:04,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:04,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:42:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:42:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:04,476 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:42:04,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-30 07:42:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:04,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:04,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345490900] [2023-08-30 07:42:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345490900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:04,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:04,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:42:04,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626101381] [2023-08-30 07:42:04,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:04,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:42:04,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:42:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:42:04,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-30 07:42:04,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:04,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-30 07:42:04,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:04,802 INFO L130 PetriNetUnfolder]: 210/320 cut-off events. [2023-08-30 07:42:04,803 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 07:42:04,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 320 events. 210/320 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1157 event pairs, 94 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 643. Up to 315 conditions per place. [2023-08-30 07:42:04,805 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 07:42:04,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 125 flow [2023-08-30 07:42:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:42:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:42:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-30 07:42:04,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45125348189415043 [2023-08-30 07:42:04,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-30 07:42:04,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-30 07:42:04,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:04,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-30 07:42:04,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,812 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 79 flow. Second operand 3 states and 486 transitions. [2023-08-30 07:42:04,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 125 flow [2023-08-30 07:42:04,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:04,813 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 74 flow [2023-08-30 07:42:04,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-30 07:42:04,814 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-30 07:42:04,815 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 74 flow [2023-08-30 07:42:04,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:04,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:42:04,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:05,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:05,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash 678152, now seen corresponding path program 1 times [2023-08-30 07:42:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:05,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134895441] [2023-08-30 07:42:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:05,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:05,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:05,031 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:05,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:42:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:42:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:05,154 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:05,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:05,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:05,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:05,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134895441] [2023-08-30 07:42:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134895441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:05,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:42:05,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108940531] [2023-08-30 07:42:05,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:05,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:42:05,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:42:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:42:06,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-08-30 07:42:06,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:06,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:06,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-08-30 07:42:06,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:06,578 INFO L130 PetriNetUnfolder]: 412/632 cut-off events. [2023-08-30 07:42:06,578 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:42:06,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 632 events. 412/632 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2826 event pairs, 187 based on Foata normal form. 3/219 useless extension candidates. Maximal degree in co-relation 1273. Up to 312 conditions per place. [2023-08-30 07:42:06,582 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 46 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-08-30 07:42:06,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 250 flow [2023-08-30 07:42:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:42:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:42:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 944 transitions. [2023-08-30 07:42:06,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382544103992572 [2023-08-30 07:42:06,587 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 944 transitions. [2023-08-30 07:42:06,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 944 transitions. [2023-08-30 07:42:06,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:06,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 944 transitions. [2023-08-30 07:42:06,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.33333333333334) internal successors, (944), 6 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:06,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:06,594 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:06,594 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 74 flow. Second operand 6 states and 944 transitions. [2023-08-30 07:42:06,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 250 flow [2023-08-30 07:42:06,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:06,597 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 131 flow [2023-08-30 07:42:06,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=131, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-30 07:42:06,600 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 07:42:06,600 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 131 flow [2023-08-30 07:42:06,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:06,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:06,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:42:06,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:06,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:06,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:06,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 651775888, now seen corresponding path program 1 times [2023-08-30 07:42:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:06,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368666870] [2023-08-30 07:42:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:06,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:06,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:06,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:42:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:42:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:06,946 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:06,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:07,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:07,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:07,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368666870] [2023-08-30 07:42:07,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368666870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:07,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:07,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:42:07,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373073111] [2023-08-30 07:42:07,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:07,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:42:07,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:07,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:42:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:42:07,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 359 [2023-08-30 07:42:07,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 131 flow. Second operand has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:07,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:07,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 359 [2023-08-30 07:42:07,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:08,177 INFO L130 PetriNetUnfolder]: 378/576 cut-off events. [2023-08-30 07:42:08,177 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 07:42:08,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 576 events. 378/576 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2512 event pairs, 171 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 1180. Up to 284 conditions per place. [2023-08-30 07:42:08,181 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-30 07:42:08,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 275 flow [2023-08-30 07:42:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:42:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:42:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 769 transitions. [2023-08-30 07:42:08,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284122562674095 [2023-08-30 07:42:08,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 769 transitions. [2023-08-30 07:42:08,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 769 transitions. [2023-08-30 07:42:08,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:08,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 769 transitions. [2023-08-30 07:42:08,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,190 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 131 flow. Second operand 5 states and 769 transitions. [2023-08-30 07:42:08,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 275 flow [2023-08-30 07:42:08,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 263 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:08,192 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 121 flow [2023-08-30 07:42:08,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-30 07:42:08,193 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-30 07:42:08,193 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 121 flow [2023-08-30 07:42:08,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:08,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:42:08,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:08,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:08,400 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:08,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash 651775886, now seen corresponding path program 1 times [2023-08-30 07:42:08,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:08,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510535045] [2023-08-30 07:42:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:08,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:08,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:08,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:42:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:42:08,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:08,517 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-30 07:42:08,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-30 07:42:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:08,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:08,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:08,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510535045] [2023-08-30 07:42:08,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510535045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:08,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:08,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:42:08,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256674579] [2023-08-30 07:42:08,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:08,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:42:08,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:42:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:42:08,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 359 [2023-08-30 07:42:08,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:08,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 359 [2023-08-30 07:42:08,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:08,784 INFO L130 PetriNetUnfolder]: 353/529 cut-off events. [2023-08-30 07:42:08,784 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 07:42:08,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 529 events. 353/529 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2226 event pairs, 156 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 1084. Up to 519 conditions per place. [2023-08-30 07:42:08,787 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 07:42:08,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 29 transitions, 171 flow [2023-08-30 07:42:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:42:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:42:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-30 07:42:08,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391829155060353 [2023-08-30 07:42:08,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-30 07:42:08,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-30 07:42:08,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:08,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-30 07:42:08,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,794 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 121 flow. Second operand 3 states and 473 transitions. [2023-08-30 07:42:08,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 29 transitions, 171 flow [2023-08-30 07:42:08,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:42:08,796 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 114 flow [2023-08-30 07:42:08,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 07:42:08,796 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-30 07:42:08,797 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 114 flow [2023-08-30 07:42:08,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:08,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:08,797 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:42:08,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:09,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:09,007 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:09,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:09,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1270290372, now seen corresponding path program 2 times [2023-08-30 07:42:09,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:09,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580935902] [2023-08-30 07:42:09,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:42:09,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:09,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:09,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:09,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:42:09,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:42:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:42:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:42:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:09,126 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:09,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:09,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:09,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:09,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580935902] [2023-08-30 07:42:09,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580935902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:09,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:09,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:42:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437831932] [2023-08-30 07:42:09,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:09,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:42:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:09,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:42:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:42:12,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 359 [2023-08-30 07:42:12,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 114 flow. Second operand has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:12,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:12,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 359 [2023-08-30 07:42:12,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:15,150 INFO L130 PetriNetUnfolder]: 1505/2282 cut-off events. [2023-08-30 07:42:15,150 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-30 07:42:15,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4623 conditions, 2282 events. 1505/2282 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12074 event pairs, 694 based on Foata normal form. 6/917 useless extension candidates. Maximal degree in co-relation 4606. Up to 256 conditions per place. [2023-08-30 07:42:15,162 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 164 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2023-08-30 07:42:15,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 178 transitions, 838 flow [2023-08-30 07:42:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:42:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:42:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1970 transitions. [2023-08-30 07:42:15,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457288765088208 [2023-08-30 07:42:15,172 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1970 transitions. [2023-08-30 07:42:15,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1970 transitions. [2023-08-30 07:42:15,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:15,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1970 transitions. [2023-08-30 07:42:15,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.16666666666666) internal successors, (1970), 12 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:15,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:15,194 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:15,194 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 114 flow. Second operand 12 states and 1970 transitions. [2023-08-30 07:42:15,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 178 transitions, 838 flow [2023-08-30 07:42:15,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 178 transitions, 837 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:15,202 INFO L231 Difference]: Finished difference. Result has 57 places, 36 transitions, 199 flow [2023-08-30 07:42:15,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=36} [2023-08-30 07:42:15,203 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-08-30 07:42:15,203 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 36 transitions, 199 flow [2023-08-30 07:42:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:15,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:15,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:42:15,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:15,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:15,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:15,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789535, now seen corresponding path program 1 times [2023-08-30 07:42:15,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:15,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324301528] [2023-08-30 07:42:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:15,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:15,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:15,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 07:42:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:42:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:15,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:15,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-08-30 07:42:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:15,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:15,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324301528] [2023-08-30 07:42:15,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324301528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:15,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:15,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:42:15,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405173206] [2023-08-30 07:42:15,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:15,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:42:15,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:15,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:42:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:42:16,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 359 [2023-08-30 07:42:16,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 36 transitions, 199 flow. Second operand has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:16,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:16,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 359 [2023-08-30 07:42:16,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:17,741 INFO L130 PetriNetUnfolder]: 1973/3137 cut-off events. [2023-08-30 07:42:17,742 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 07:42:17,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 3137 events. 1973/3137 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19303 event pairs, 441 based on Foata normal form. 0/1333 useless extension candidates. Maximal degree in co-relation 6382. Up to 1936 conditions per place. [2023-08-30 07:42:17,761 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 56 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2023-08-30 07:42:17,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 408 flow [2023-08-30 07:42:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:42:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:42:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1072 transitions. [2023-08-30 07:42:17,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265817747711898 [2023-08-30 07:42:17,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1072 transitions. [2023-08-30 07:42:17,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1072 transitions. [2023-08-30 07:42:17,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:17,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1072 transitions. [2023-08-30 07:42:17,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:17,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:17,773 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:17,773 INFO L175 Difference]: Start difference. First operand has 57 places, 36 transitions, 199 flow. Second operand 7 states and 1072 transitions. [2023-08-30 07:42:17,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 408 flow [2023-08-30 07:42:17,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 395 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 07:42:17,777 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 231 flow [2023-08-30 07:42:17,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-30 07:42:17,779 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-08-30 07:42:17,779 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 231 flow [2023-08-30 07:42:17,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:17,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:17,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:42:17,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:17,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:17,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789536, now seen corresponding path program 1 times [2023-08-30 07:42:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:17,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744517410] [2023-08-30 07:42:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:17,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:17,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:17,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:17,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 07:42:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:18,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:42:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:18,090 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:42:18,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 07:42:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:18,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:18,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:18,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744517410] [2023-08-30 07:42:18,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744517410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:18,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:18,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:42:18,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358637844] [2023-08-30 07:42:18,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:18,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:42:18,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:42:18,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:42:18,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 359 [2023-08-30 07:42:18,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:18,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:18,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 359 [2023-08-30 07:42:18,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:18,599 INFO L130 PetriNetUnfolder]: 1181/1967 cut-off events. [2023-08-30 07:42:18,600 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2023-08-30 07:42:18,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4547 conditions, 1967 events. 1181/1967 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11534 event pairs, 657 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 4519. Up to 1918 conditions per place. [2023-08-30 07:42:18,620 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 29 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-08-30 07:42:18,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 37 transitions, 297 flow [2023-08-30 07:42:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:42:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:42:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-08-30 07:42:18,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41852367688022285 [2023-08-30 07:42:18,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-08-30 07:42:18,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-08-30 07:42:18,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:18,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-08-30 07:42:18,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:18,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:18,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:18,628 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 231 flow. Second operand 4 states and 601 transitions. [2023-08-30 07:42:18,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 37 transitions, 297 flow [2023-08-30 07:42:18,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 37 transitions, 283 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 07:42:18,631 INFO L231 Difference]: Finished difference. Result has 60 places, 37 transitions, 225 flow [2023-08-30 07:42:18,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=60, PETRI_TRANSITIONS=37} [2023-08-30 07:42:18,631 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-08-30 07:42:18,632 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 37 transitions, 225 flow [2023-08-30 07:42:18,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:18,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:18,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:18,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:18,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:18,842 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:18,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash -708769242, now seen corresponding path program 1 times [2023-08-30 07:42:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:18,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596426686] [2023-08-30 07:42:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:18,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:18,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:18,844 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:18,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:42:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:42:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:18,965 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:18,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:19,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:19,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596426686] [2023-08-30 07:42:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596426686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:19,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:19,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:42:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136741490] [2023-08-30 07:42:19,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:19,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:42:19,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:42:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:42:24,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 359 [2023-08-30 07:42:24,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 37 transitions, 225 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:24,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:24,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 359 [2023-08-30 07:42:24,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:26,665 INFO L130 PetriNetUnfolder]: 937/1615 cut-off events. [2023-08-30 07:42:26,665 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2023-08-30 07:42:26,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 1615 events. 937/1615 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9337 event pairs, 523 based on Foata normal form. 21/1137 useless extension candidates. Maximal degree in co-relation 3706. Up to 1249 conditions per place. [2023-08-30 07:42:26,674 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 49 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2023-08-30 07:42:26,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 410 flow [2023-08-30 07:42:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:42:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:42:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1352 transitions. [2023-08-30 07:42:26,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418446301454658 [2023-08-30 07:42:26,680 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1352 transitions. [2023-08-30 07:42:26,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1352 transitions. [2023-08-30 07:42:26,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:26,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1352 transitions. [2023-08-30 07:42:26,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.22222222222223) internal successors, (1352), 9 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:26,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:26,687 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:26,687 INFO L175 Difference]: Start difference. First operand has 60 places, 37 transitions, 225 flow. Second operand 9 states and 1352 transitions. [2023-08-30 07:42:26,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 410 flow [2023-08-30 07:42:26,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:42:26,690 INFO L231 Difference]: Finished difference. Result has 68 places, 37 transitions, 255 flow [2023-08-30 07:42:26,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=255, PETRI_PLACES=68, PETRI_TRANSITIONS=37} [2023-08-30 07:42:26,692 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-08-30 07:42:26,693 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 37 transitions, 255 flow [2023-08-30 07:42:26,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:26,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:26,693 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:26,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:26,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:26,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:26,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 486334298, now seen corresponding path program 2 times [2023-08-30 07:42:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:26,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951838271] [2023-08-30 07:42:26,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:42:26,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:26,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:26,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:26,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:42:26,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:42:26,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:42:26,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:42:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:27,045 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:27,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:42:27,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:27,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951838271] [2023-08-30 07:42:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951838271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:27,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:27,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:42:27,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952193483] [2023-08-30 07:42:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:27,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:42:27,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:42:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:42:27,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 359 [2023-08-30 07:42:27,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 37 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:27,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:27,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 359 [2023-08-30 07:42:27,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:27,667 INFO L130 PetriNetUnfolder]: 533/995 cut-off events. [2023-08-30 07:42:27,668 INFO L131 PetriNetUnfolder]: For 968/968 co-relation queries the response was YES. [2023-08-30 07:42:27,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2310 conditions, 995 events. 533/995 cut-off events. For 968/968 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5525 event pairs, 279 based on Foata normal form. 144/896 useless extension candidates. Maximal degree in co-relation 2279. Up to 946 conditions per place. [2023-08-30 07:42:27,672 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 07:42:27,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-08-30 07:42:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:42:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:42:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-30 07:42:27,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431058495821727 [2023-08-30 07:42:27,675 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-30 07:42:27,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-30 07:42:27,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:27,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-30 07:42:27,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:27,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:27,679 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:27,679 INFO L175 Difference]: Start difference. First operand has 68 places, 37 transitions, 255 flow. Second operand 4 states and 619 transitions. [2023-08-30 07:42:27,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-08-30 07:42:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-08-30 07:42:27,682 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-08-30 07:42:27,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 07:42:27,683 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-30 07:42:27,683 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-08-30 07:42:27,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:27,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:27,695 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:42:27,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:27,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:27,904 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:27,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1476326588, now seen corresponding path program 3 times [2023-08-30 07:42:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429738977] [2023-08-30 07:42:27,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:42:27,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:27,906 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:27,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:42:28,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:42:28,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:42:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:42:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:28,125 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:42:28,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:42:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:28,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:42:30,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:30,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429738977] [2023-08-30 07:42:30,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429738977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:30,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:30,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:42:30,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309980045] [2023-08-30 07:42:30,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:30,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:42:30,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:30,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:42:30,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:42:41,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 359 [2023-08-30 07:42:41,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:41,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:41,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 359 [2023-08-30 07:42:41,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:54,631 INFO L130 PetriNetUnfolder]: 1201/2275 cut-off events. [2023-08-30 07:42:54,631 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-08-30 07:42:54,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5026 conditions, 2275 events. 1201/2275 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13375 event pairs, 631 based on Foata normal form. 12/1860 useless extension candidates. Maximal degree in co-relation 5004. Up to 504 conditions per place. [2023-08-30 07:42:54,642 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-08-30 07:42:54,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-08-30 07:42:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:42:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:42:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3887 transitions. [2023-08-30 07:42:54,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45113741875580315 [2023-08-30 07:42:54,651 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3887 transitions. [2023-08-30 07:42:54,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3887 transitions. [2023-08-30 07:42:54,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:54,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3887 transitions. [2023-08-30 07:42:54,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 161.95833333333334) internal successors, (3887), 24 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:54,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:54,670 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:54,670 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 3887 transitions. [2023-08-30 07:42:54,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-08-30 07:42:54,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:42:54,676 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-08-30 07:42:54,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-08-30 07:42:54,677 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-08-30 07:42:54,677 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-08-30 07:42:54,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:54,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:54,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:54,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:54,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:54,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:54,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:54,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1572933441, now seen corresponding path program 1 times [2023-08-30 07:42:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:54,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520848262] [2023-08-30 07:42:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:54,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:54,897 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:54,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:42:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:42:54,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:55,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:55,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:55,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520848262] [2023-08-30 07:42:55,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520848262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:55,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:55,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:42:55,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486694090] [2023-08-30 07:42:55,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:55,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:42:55,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:55,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:42:55,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:42:55,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 359 [2023-08-30 07:42:55,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:55,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:55,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 359 [2023-08-30 07:42:55,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:55,439 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-08-30 07:42:55,439 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-08-30 07:42:55,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 16734 event pairs, 273 based on Foata normal form. 21/2189 useless extension candidates. Maximal degree in co-relation 6152. Up to 2101 conditions per place. [2023-08-30 07:42:55,449 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-08-30 07:42:55,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-08-30 07:42:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:42:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:42:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 07:42:55,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596100278551532 [2023-08-30 07:42:55,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 07:42:55,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 07:42:55,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:55,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 07:42:55,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:55,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:55,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:55,455 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 495 transitions. [2023-08-30 07:42:55,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-08-30 07:42:55,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 07:42:55,460 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-08-30 07:42:55,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-08-30 07:42:55,460 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2023-08-30 07:42:55,461 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-08-30 07:42:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:55,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:55,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:55,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:55,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:55,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:55,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash -7085512, now seen corresponding path program 1 times [2023-08-30 07:42:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:55,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102768516] [2023-08-30 07:42:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:55,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:55,671 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:42:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:42:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:55,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:55,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:55,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102768516] [2023-08-30 07:42:55,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102768516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:55,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:55,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:42:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113951974] [2023-08-30 07:42:55,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:55,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:42:55,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:42:55,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:42:55,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-08-30 07:42:55,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:55,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:55,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-08-30 07:42:55,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:56,202 INFO L130 PetriNetUnfolder]: 1463/2827 cut-off events. [2023-08-30 07:42:56,202 INFO L131 PetriNetUnfolder]: For 1073/1073 co-relation queries the response was YES. [2023-08-30 07:42:56,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7128 conditions, 2827 events. 1463/2827 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17894 event pairs, 420 based on Foata normal form. 160/2907 useless extension candidates. Maximal degree in co-relation 7091. Up to 1608 conditions per place. [2023-08-30 07:42:56,214 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 56 selfloop transitions, 6 changer transitions 2/65 dead transitions. [2023-08-30 07:42:56,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 65 transitions, 521 flow [2023-08-30 07:42:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:42:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:42:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-30 07:42:56,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637883008356544 [2023-08-30 07:42:56,216 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-30 07:42:56,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-30 07:42:56,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:56,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-30 07:42:56,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:56,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:56,219 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:56,220 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 4 states and 641 transitions. [2023-08-30 07:42:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 65 transitions, 521 flow [2023-08-30 07:42:56,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 65 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:56,246 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 375 flow [2023-08-30 07:42:56,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2023-08-30 07:42:56,246 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-08-30 07:42:56,246 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 375 flow [2023-08-30 07:42:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:56,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:56,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:56,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:56,458 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:56,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash 807173980, now seen corresponding path program 2 times [2023-08-30 07:42:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:56,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070989611] [2023-08-30 07:42:56,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:42:56,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:56,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:56,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 07:42:56,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:42:56,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:42:56,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:42:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:56,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:56,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070989611] [2023-08-30 07:42:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070989611] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 07:42:56,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 07:42:56,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-08-30 07:42:56,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530649357] [2023-08-30 07:42:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:42:56,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:42:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:42:56,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-08-30 07:42:56,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:56,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:56,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-08-30 07:42:56,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:57,151 INFO L130 PetriNetUnfolder]: 1663/3127 cut-off events. [2023-08-30 07:42:57,152 INFO L131 PetriNetUnfolder]: For 3078/3102 co-relation queries the response was YES. [2023-08-30 07:42:57,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 3127 events. 1663/3127 cut-off events. For 3078/3102 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 18854 event pairs, 460 based on Foata normal form. 82/3109 useless extension candidates. Maximal degree in co-relation 9491. Up to 2080 conditions per place. [2023-08-30 07:42:57,166 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-08-30 07:42:57,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 65 transitions, 559 flow [2023-08-30 07:42:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:42:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:42:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-30 07:42:57,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637883008356544 [2023-08-30 07:42:57,170 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-30 07:42:57,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-30 07:42:57,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:57,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-30 07:42:57,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:57,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:57,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:57,175 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 375 flow. Second operand 4 states and 641 transitions. [2023-08-30 07:42:57,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 65 transitions, 559 flow [2023-08-30 07:42:57,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 65 transitions, 539 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:57,183 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 407 flow [2023-08-30 07:42:57,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2023-08-30 07:42:57,184 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-08-30 07:42:57,184 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 407 flow [2023-08-30 07:42:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:57,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:57,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:57,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:57,395 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:57,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1719858430, now seen corresponding path program 1 times [2023-08-30 07:42:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376156619] [2023-08-30 07:42:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:42:57,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:57,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:57,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:57,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:42:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:42:57,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:42:57,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:57,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:42:57,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:57,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376156619] [2023-08-30 07:42:57,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376156619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:42:57,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:42:57,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:42:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456415079] [2023-08-30 07:42:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:42:57,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:42:57,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:57,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:42:57,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:42:57,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-08-30 07:42:57,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:57,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:57,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-08-30 07:42:57,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:58,035 INFO L130 PetriNetUnfolder]: 1703/3387 cut-off events. [2023-08-30 07:42:58,035 INFO L131 PetriNetUnfolder]: For 5079/5319 co-relation queries the response was YES. [2023-08-30 07:42:58,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10232 conditions, 3387 events. 1703/3387 cut-off events. For 5079/5319 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21989 event pairs, 620 based on Foata normal form. 200/3467 useless extension candidates. Maximal degree in co-relation 10191. Up to 2228 conditions per place. [2023-08-30 07:42:58,051 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 63 selfloop transitions, 4 changer transitions 2/71 dead transitions. [2023-08-30 07:42:58,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 71 transitions, 620 flow [2023-08-30 07:42:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:42:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:42:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 635 transitions. [2023-08-30 07:42:58,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44220055710306405 [2023-08-30 07:42:58,054 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 635 transitions. [2023-08-30 07:42:58,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 635 transitions. [2023-08-30 07:42:58,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:58,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 635 transitions. [2023-08-30 07:42:58,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:58,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:58,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:58,070 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 407 flow. Second operand 4 states and 635 transitions. [2023-08-30 07:42:58,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 71 transitions, 620 flow [2023-08-30 07:42:58,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 71 transitions, 615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:58,088 INFO L231 Difference]: Finished difference. Result has 93 places, 56 transitions, 435 flow [2023-08-30 07:42:58,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=93, PETRI_TRANSITIONS=56} [2023-08-30 07:42:58,088 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-08-30 07:42:58,088 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 56 transitions, 435 flow [2023-08-30 07:42:58,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:58,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:58,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:58,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:58,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:58,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:58,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:58,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1254785704, now seen corresponding path program 2 times [2023-08-30 07:42:58,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:58,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352497761] [2023-08-30 07:42:58,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:42:58,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:58,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:58,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:58,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:42:58,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:42:58,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:42:58,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:42:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:42:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:58,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:42:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:42:58,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:42:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352497761] [2023-08-30 07:42:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352497761] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:42:58,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:42:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 07:42:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509097403] [2023-08-30 07:42:58,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:42:58,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:42:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:42:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:42:58,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:42:58,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-08-30 07:42:58,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 56 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:58,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:42:58,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-08-30 07:42:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:42:59,613 INFO L130 PetriNetUnfolder]: 2783/5327 cut-off events. [2023-08-30 07:42:59,613 INFO L131 PetriNetUnfolder]: For 10653/11413 co-relation queries the response was YES. [2023-08-30 07:42:59,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19454 conditions, 5327 events. 2783/5327 cut-off events. For 10653/11413 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 37001 event pairs, 540 based on Foata normal form. 1200/6527 useless extension candidates. Maximal degree in co-relation 19411. Up to 1841 conditions per place. [2023-08-30 07:42:59,645 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 77 selfloop transitions, 15 changer transitions 7/100 dead transitions. [2023-08-30 07:42:59,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 847 flow [2023-08-30 07:42:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:42:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:42:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1121 transitions. [2023-08-30 07:42:59,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460803820135296 [2023-08-30 07:42:59,649 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1121 transitions. [2023-08-30 07:42:59,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1121 transitions. [2023-08-30 07:42:59,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:42:59,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1121 transitions. [2023-08-30 07:42:59,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.14285714285714) internal successors, (1121), 7 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:59,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:59,654 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:59,654 INFO L175 Difference]: Start difference. First operand has 93 places, 56 transitions, 435 flow. Second operand 7 states and 1121 transitions. [2023-08-30 07:42:59,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 100 transitions, 847 flow [2023-08-30 07:42:59,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 808 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-30 07:42:59,707 INFO L231 Difference]: Finished difference. Result has 101 places, 62 transitions, 527 flow [2023-08-30 07:42:59,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=101, PETRI_TRANSITIONS=62} [2023-08-30 07:42:59,708 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-08-30 07:42:59,708 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 62 transitions, 527 flow [2023-08-30 07:42:59,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:42:59,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:42:59,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:42:59,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:42:59,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:59,924 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:42:59,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:42:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash -671136611, now seen corresponding path program 3 times [2023-08-30 07:42:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:42:59,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506625278] [2023-08-30 07:42:59,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:42:59,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:42:59,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:42:59,926 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:42:59,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:43:00,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:43:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:43:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:43:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:43:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:43:00,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:43:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:43:00,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:43:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506625278] [2023-08-30 07:43:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506625278] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 07:43:00,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 07:43:00,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-08-30 07:43:00,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548410149] [2023-08-30 07:43:00,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:43:00,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:43:00,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:43:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:43:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:43:00,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-08-30 07:43:00,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 62 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:00,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:43:00,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-08-30 07:43:00,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:43:01,005 INFO L130 PetriNetUnfolder]: 3363/6187 cut-off events. [2023-08-30 07:43:01,005 INFO L131 PetriNetUnfolder]: For 14737/15137 co-relation queries the response was YES. [2023-08-30 07:43:01,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23977 conditions, 6187 events. 3363/6187 cut-off events. For 14737/15137 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 39209 event pairs, 760 based on Foata normal form. 440/6567 useless extension candidates. Maximal degree in co-relation 23931. Up to 5120 conditions per place. [2023-08-30 07:43:01,044 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 67 selfloop transitions, 6 changer transitions 1/76 dead transitions. [2023-08-30 07:43:01,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 746 flow [2023-08-30 07:43:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:43:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:43:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 635 transitions. [2023-08-30 07:43:01,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44220055710306405 [2023-08-30 07:43:01,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 635 transitions. [2023-08-30 07:43:01,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 635 transitions. [2023-08-30 07:43:01,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:43:01,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 635 transitions. [2023-08-30 07:43:01,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:01,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:01,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:01,050 INFO L175 Difference]: Start difference. First operand has 101 places, 62 transitions, 527 flow. Second operand 4 states and 635 transitions. [2023-08-30 07:43:01,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 746 flow [2023-08-30 07:43:01,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 76 transitions, 710 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-30 07:43:01,077 INFO L231 Difference]: Finished difference. Result has 103 places, 64 transitions, 535 flow [2023-08-30 07:43:01,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=535, PETRI_PLACES=103, PETRI_TRANSITIONS=64} [2023-08-30 07:43:01,078 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-08-30 07:43:01,078 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 64 transitions, 535 flow [2023-08-30 07:43:01,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:01,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:43:01,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:43:01,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:43:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:43:01,289 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:43:01,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:43:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash 322299853, now seen corresponding path program 4 times [2023-08-30 07:43:01,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:43:01,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757412625] [2023-08-30 07:43:01,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:43:01,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:43:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:43:01,291 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:43:01,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:43:01,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:43:01,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:43:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:43:01,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:43:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:43:01,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:43:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:43:01,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:43:01,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757412625] [2023-08-30 07:43:01,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757412625] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:43:01,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:43:01,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-08-30 07:43:01,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137092895] [2023-08-30 07:43:01,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:43:01,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:43:01,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:43:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:43:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:43:01,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-08-30 07:43:01,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 64 transitions, 535 flow. Second operand has 11 states, 11 states have (on average 150.36363636363637) internal successors, (1654), 11 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:01,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:43:01,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-08-30 07:43:01,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:43:04,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:06,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:08,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:10,256 INFO L130 PetriNetUnfolder]: 6023/10827 cut-off events. [2023-08-30 07:43:10,256 INFO L131 PetriNetUnfolder]: For 29071/29071 co-relation queries the response was YES. [2023-08-30 07:43:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42799 conditions, 10827 events. 6023/10827 cut-off events. For 29071/29071 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 74097 event pairs, 1540 based on Foata normal form. 400/11227 useless extension candidates. Maximal degree in co-relation 42751. Up to 6028 conditions per place. [2023-08-30 07:43:10,319 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 83 selfloop transitions, 55 changer transitions 4/142 dead transitions. [2023-08-30 07:43:10,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1255 flow [2023-08-30 07:43:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 07:43:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 07:43:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2007 transitions. [2023-08-30 07:43:10,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43004071137775873 [2023-08-30 07:43:10,323 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2007 transitions. [2023-08-30 07:43:10,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2007 transitions. [2023-08-30 07:43:10,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:43:10,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2007 transitions. [2023-08-30 07:43:10,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 154.3846153846154) internal successors, (2007), 13 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:10,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:10,335 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:10,335 INFO L175 Difference]: Start difference. First operand has 103 places, 64 transitions, 535 flow. Second operand 13 states and 2007 transitions. [2023-08-30 07:43:10,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1255 flow [2023-08-30 07:43:10,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 142 transitions, 1236 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 07:43:10,404 INFO L231 Difference]: Finished difference. Result has 120 places, 109 transitions, 1042 flow [2023-08-30 07:43:10,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1042, PETRI_PLACES=120, PETRI_TRANSITIONS=109} [2023-08-30 07:43:10,405 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-08-30 07:43:10,405 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 109 transitions, 1042 flow [2023-08-30 07:43:10,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.36363636363637) internal successors, (1654), 11 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:10,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:43:10,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:43:10,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:43:10,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:43:10,616 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:43:10,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:43:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash -996186711, now seen corresponding path program 5 times [2023-08-30 07:43:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:43:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361327831] [2023-08-30 07:43:10,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:43:10,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:43:10,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:43:10,618 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:43:10,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:43:10,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:43:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:43:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 07:43:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:43:10,963 INFO L321 Elim1Store]: treesize reduction 164, result has 7.3 percent of original size [2023-08-30 07:43:10,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 178 treesize of output 90 [2023-08-30 07:43:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:43:11,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:43:11,383 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-30 07:43:11,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 299 treesize of output 140 [2023-08-30 07:43:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:43:12,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:43:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361327831] [2023-08-30 07:43:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361327831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:43:12,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:43:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:43:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169425228] [2023-08-30 07:43:12,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:43:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:43:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:43:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:43:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:43:13,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 359 [2023-08-30 07:43:13,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 109 transitions, 1042 flow. Second operand has 12 states, 12 states have (on average 142.5) internal successors, (1710), 12 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:13,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:43:13,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 359 [2023-08-30 07:43:13,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:43:16,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:18,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:20,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:22,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:24,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:26,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:28,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:30,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:43:32,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:43:34,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:43:36,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:43:38,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:43:40,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:43:42,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:43:44,498 INFO L130 PetriNetUnfolder]: 5781/10463 cut-off events. [2023-08-30 07:43:44,498 INFO L131 PetriNetUnfolder]: For 48840/49849 co-relation queries the response was YES. [2023-08-30 07:43:44,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51713 conditions, 10463 events. 5781/10463 cut-off events. For 48840/49849 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 72821 event pairs, 786 based on Foata normal form. 896/11251 useless extension candidates. Maximal degree in co-relation 51659. Up to 9070 conditions per place. [2023-08-30 07:43:44,565 INFO L137 encePairwiseOnDemand]: 351/359 looper letters, 116 selfloop transitions, 27 changer transitions 113/263 dead transitions. [2023-08-30 07:43:44,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 263 transitions, 2775 flow [2023-08-30 07:43:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 07:43:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 07:43:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2046 transitions. [2023-08-30 07:43:44,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40708316752885 [2023-08-30 07:43:44,567 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2046 transitions. [2023-08-30 07:43:44,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2046 transitions. [2023-08-30 07:43:44,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:43:44,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2046 transitions. [2023-08-30 07:43:44,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.14285714285714) internal successors, (2046), 14 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:44,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:44,575 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:44,575 INFO L175 Difference]: Start difference. First operand has 120 places, 109 transitions, 1042 flow. Second operand 14 states and 2046 transitions. [2023-08-30 07:43:44,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 263 transitions, 2775 flow [2023-08-30 07:43:44,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 263 transitions, 2456 flow, removed 133 selfloop flow, removed 4 redundant places. [2023-08-30 07:43:44,806 INFO L231 Difference]: Finished difference. Result has 136 places, 121 transitions, 1113 flow [2023-08-30 07:43:44,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1113, PETRI_PLACES=136, PETRI_TRANSITIONS=121} [2023-08-30 07:43:44,806 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-08-30 07:43:44,807 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 121 transitions, 1113 flow [2023-08-30 07:43:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.5) internal successors, (1710), 12 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:43:44,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:43:44,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:43:44,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:43:45,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:43:45,012 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:43:45,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:43:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1938222630, now seen corresponding path program 1 times [2023-08-30 07:43:45,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:43:45,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947193184] [2023-08-30 07:43:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:43:45,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:43:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:43:45,014 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:43:45,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:43:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:43:45,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:43:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:43:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:43:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:43:45,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:43:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:43:45,435 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:43:45,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:43:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:43:45,438 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:43:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:43:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:43:45,534 INFO L321 Elim1Store]: treesize reduction 348, result has 6.7 percent of original size [2023-08-30 07:43:45,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 217 treesize of output 111 [2023-08-30 07:43:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:43:45,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:43:46,937 INFO L321 Elim1Store]: treesize reduction 566, result has 15.9 percent of original size [2023-08-30 07:43:46,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 201 [2023-08-30 07:45:22,263 WARN L222 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 1496 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:45:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:45:23,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:45:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947193184] [2023-08-30 07:45:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947193184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:45:23,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:45:23,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:45:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923439573] [2023-08-30 07:45:23,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:45:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:45:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:45:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:45:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=97, Unknown=2, NotChecked=0, Total=132 [2023-08-30 07:45:31,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 359 [2023-08-30 07:45:31,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 121 transitions, 1113 flow. Second operand has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:31,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:45:31,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 359 [2023-08-30 07:45:31,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:45:37,324 INFO L130 PetriNetUnfolder]: 5407/9817 cut-off events. [2023-08-30 07:45:37,324 INFO L131 PetriNetUnfolder]: For 44977/45987 co-relation queries the response was YES. [2023-08-30 07:45:37,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47985 conditions, 9817 events. 5407/9817 cut-off events. For 44977/45987 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 68281 event pairs, 742 based on Foata normal form. 759/10437 useless extension candidates. Maximal degree in co-relation 47924. Up to 8950 conditions per place. [2023-08-30 07:45:37,384 INFO L137 encePairwiseOnDemand]: 351/359 looper letters, 103 selfloop transitions, 13 changer transitions 46/169 dead transitions. [2023-08-30 07:45:37,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 169 transitions, 1785 flow [2023-08-30 07:45:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:45:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:45:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1207 transitions. [2023-08-30 07:45:37,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362116991643454 [2023-08-30 07:45:37,385 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1207 transitions. [2023-08-30 07:45:37,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1207 transitions. [2023-08-30 07:45:37,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:45:37,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1207 transitions. [2023-08-30 07:45:37,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:37,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:37,390 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:37,390 INFO L175 Difference]: Start difference. First operand has 136 places, 121 transitions, 1113 flow. Second operand 10 states and 1207 transitions. [2023-08-30 07:45:37,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 169 transitions, 1785 flow [2023-08-30 07:45:37,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 169 transitions, 1711 flow, removed 30 selfloop flow, removed 7 redundant places. [2023-08-30 07:45:37,592 INFO L231 Difference]: Finished difference. Result has 138 places, 108 transitions, 962 flow [2023-08-30 07:45:37,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=962, PETRI_PLACES=138, PETRI_TRANSITIONS=108} [2023-08-30 07:45:37,593 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 100 predicate places. [2023-08-30 07:45:37,593 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 108 transitions, 962 flow [2023-08-30 07:45:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:45:37,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:45:37,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:45:37,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:45:37,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:45:37,794 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:45:37,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:45:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1043230612, now seen corresponding path program 2 times [2023-08-30 07:45:37,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:45:37,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790645186] [2023-08-30 07:45:37,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:45:37,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:45:37,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:45:37,796 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:45:37,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:45:37,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:45:37,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:45:37,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:45:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:45:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:45:38,499 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:45:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:45:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:45:38,505 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:45:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:45:38,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:45:38,736 INFO L321 Elim1Store]: treesize reduction 348, result has 6.7 percent of original size [2023-08-30 07:45:38,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 217 treesize of output 111 [2023-08-30 07:45:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:45:38,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:45:40,917 INFO L321 Elim1Store]: treesize reduction 566, result has 15.9 percent of original size [2023-08-30 07:45:40,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 201 [2023-08-30 07:46:59,949 WARN L222 SmtUtils]: Spent 24.58s on a formula simplification. DAG size of input: 1448 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:47:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:47:01,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:47:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790645186] [2023-08-30 07:47:01,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790645186] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:47:01,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:47:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:47:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191153649] [2023-08-30 07:47:01,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:47:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:47:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:47:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:47:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2023-08-30 07:47:06,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 359 [2023-08-30 07:47:07,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 108 transitions, 962 flow. Second operand has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:07,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:47:07,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 359 [2023-08-30 07:47:07,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:47:12,281 INFO L130 PetriNetUnfolder]: 5285/9612 cut-off events. [2023-08-30 07:47:12,281 INFO L131 PetriNetUnfolder]: For 46304/47284 co-relation queries the response was YES. [2023-08-30 07:47:12,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46596 conditions, 9612 events. 5285/9612 cut-off events. For 46304/47284 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 66550 event pairs, 914 based on Foata normal form. 728/10203 useless extension candidates. Maximal degree in co-relation 46535. Up to 8950 conditions per place. [2023-08-30 07:47:12,473 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 90 selfloop transitions, 9 changer transitions 23/129 dead transitions. [2023-08-30 07:47:12,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 129 transitions, 1335 flow [2023-08-30 07:47:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:47:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:47:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1197 transitions. [2023-08-30 07:47:12,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3334261838440111 [2023-08-30 07:47:12,475 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1197 transitions. [2023-08-30 07:47:12,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1197 transitions. [2023-08-30 07:47:12,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:47:12,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1197 transitions. [2023-08-30 07:47:12,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 119.7) internal successors, (1197), 10 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:12,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:12,480 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:12,480 INFO L175 Difference]: Start difference. First operand has 138 places, 108 transitions, 962 flow. Second operand 10 states and 1197 transitions. [2023-08-30 07:47:12,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 129 transitions, 1335 flow [2023-08-30 07:47:12,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 129 transitions, 1294 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-30 07:47:12,638 INFO L231 Difference]: Finished difference. Result has 136 places, 103 transitions, 887 flow [2023-08-30 07:47:12,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=887, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2023-08-30 07:47:12,638 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-08-30 07:47:12,638 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 887 flow [2023-08-30 07:47:12,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:12,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:47:12,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:47:12,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 07:47:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:47:12,845 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:47:12,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:47:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -450113443, now seen corresponding path program 6 times [2023-08-30 07:47:12,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:47:12,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825650791] [2023-08-30 07:47:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:47:12,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:47:12,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:47:12,847 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:47:12,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 07:47:12,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 07:47:12,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:47:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:47:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:47:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:47:13,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:47:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:47:13,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:47:13,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825650791] [2023-08-30 07:47:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825650791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:47:13,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:47:13,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-30 07:47:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903963427] [2023-08-30 07:47:13,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:47:13,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:47:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:47:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:47:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:47:14,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-08-30 07:47:14,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 887 flow. Second operand has 12 states, 12 states have (on average 149.91666666666666) internal successors, (1799), 12 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:14,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:47:14,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-08-30 07:47:14,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:47:17,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:47:20,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:47:22,202 INFO L130 PetriNetUnfolder]: 6444/11465 cut-off events. [2023-08-30 07:47:22,202 INFO L131 PetriNetUnfolder]: For 45322/45322 co-relation queries the response was YES. [2023-08-30 07:47:22,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53018 conditions, 11465 events. 6444/11465 cut-off events. For 45322/45322 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 78474 event pairs, 1672 based on Foata normal form. 380/11845 useless extension candidates. Maximal degree in co-relation 52959. Up to 7039 conditions per place. [2023-08-30 07:47:22,294 INFO L137 encePairwiseOnDemand]: 353/359 looper letters, 111 selfloop transitions, 47 changer transitions 2/160 dead transitions. [2023-08-30 07:47:22,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1582 flow [2023-08-30 07:47:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:47:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:47:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1852 transitions. [2023-08-30 07:47:22,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298978644382544 [2023-08-30 07:47:22,298 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1852 transitions. [2023-08-30 07:47:22,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1852 transitions. [2023-08-30 07:47:22,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:47:22,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1852 transitions. [2023-08-30 07:47:22,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.33333333333334) internal successors, (1852), 12 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:22,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:22,302 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:22,302 INFO L175 Difference]: Start difference. First operand has 136 places, 103 transitions, 887 flow. Second operand 12 states and 1852 transitions. [2023-08-30 07:47:22,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1582 flow [2023-08-30 07:47:22,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 160 transitions, 1458 flow, removed 47 selfloop flow, removed 9 redundant places. [2023-08-30 07:47:22,539 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1128 flow [2023-08-30 07:47:22,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1128, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2023-08-30 07:47:22,539 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2023-08-30 07:47:22,539 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1128 flow [2023-08-30 07:47:22,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 149.91666666666666) internal successors, (1799), 12 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:47:22,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:47:22,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:47:22,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 07:47:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:47:22,741 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:47:22,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:47:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1533238626, now seen corresponding path program 3 times [2023-08-30 07:47:22,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:47:22,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354114037] [2023-08-30 07:47:22,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:47:22,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:47:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:47:22,743 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:47:22,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 07:47:22,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:47:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:47:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:47:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:47:23,481 INFO L321 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2023-08-30 07:47:23,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2023-08-30 07:47:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:47:24,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:47:33,924 INFO L321 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-08-30 07:47:33,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348 [2023-08-30 07:50:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:50:00,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:50:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354114037] [2023-08-30 07:50:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354114037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:50:00,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:50:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:50:00,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401464263] [2023-08-30 07:50:00,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:50:00,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:50:00,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:50:00,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:50:00,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2023-08-30 07:50:01,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 359 [2023-08-30 07:50:01,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 1128 flow. Second operand has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:50:01,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:50:01,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 359 [2023-08-30 07:50:01,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:50:04,670 INFO L130 PetriNetUnfolder]: 7812/13935 cut-off events. [2023-08-30 07:50:04,671 INFO L131 PetriNetUnfolder]: For 52580/53169 co-relation queries the response was YES. [2023-08-30 07:50:04,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69013 conditions, 13935 events. 7812/13935 cut-off events. For 52580/53169 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 100466 event pairs, 608 based on Foata normal form. 627/14410 useless extension candidates. Maximal degree in co-relation 68954. Up to 7753 conditions per place. [2023-08-30 07:50:04,769 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 120 selfloop transitions, 55 changer transitions 1/183 dead transitions. [2023-08-30 07:50:04,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 183 transitions, 1887 flow [2023-08-30 07:50:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:50:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:50:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1117 transitions. [2023-08-30 07:50:04,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3889275766016713 [2023-08-30 07:50:04,773 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1117 transitions. [2023-08-30 07:50:04,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1117 transitions. [2023-08-30 07:50:04,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:50:04,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1117 transitions. [2023-08-30 07:50:04,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.625) internal successors, (1117), 8 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:50:04,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:50:04,776 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:50:04,776 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1128 flow. Second operand 8 states and 1117 transitions. [2023-08-30 07:50:04,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 183 transitions, 1887 flow [2023-08-30 07:50:05,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 183 transitions, 1775 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-30 07:50:05,139 INFO L231 Difference]: Finished difference. Result has 140 places, 148 transitions, 1474 flow [2023-08-30 07:50:05,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=140, PETRI_TRANSITIONS=148} [2023-08-30 07:50:05,139 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 102 predicate places. [2023-08-30 07:50:05,139 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 148 transitions, 1474 flow [2023-08-30 07:50:05,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:50:05,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:50:05,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:50:05,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-08-30 07:50:05,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:50:05,340 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:50:05,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:50:05,341 INFO L85 PathProgramCache]: Analyzing trace with hash 95170566, now seen corresponding path program 4 times [2023-08-30 07:50:05,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:50:05,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543756473] [2023-08-30 07:50:05,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:50:05,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:50:05,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:50:05,342 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:50:05,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 07:50:05,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:50:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:50:05,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:50:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:50:06,093 INFO L321 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2023-08-30 07:50:06,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2023-08-30 07:50:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:50:07,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:50:18,862 WARN L222 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 471 DAG size of output: 108 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 07:50:18,863 INFO L321 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-08-30 07:50:18,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348 [2023-08-30 07:53:20,158 WARN L222 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 5630 DAG size of output: 5630 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 07:55:13,791 WARN L222 SmtUtils]: Spent 19.77s on a formula simplification. DAG size of input: 5919 DAG size of output: 6066 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15