./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/popl20-more-buffer-series2.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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:22:28,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:22:28,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:22:28,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:22:28,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:22:28,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:22:28,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:22:28,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:22:28,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:22:28,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:22:28,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:22:28,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:22:28,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:22:28,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:22:28,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:22:28,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:22:28,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:22:28,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:22:28,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:22:28,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:22:28,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:22:28,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:22:28,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:22:28,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:22:28,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:22:28,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:22:28,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:22:28,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:22:28,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:22:28,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:22:28,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:22:28,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:22:28,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:22:28,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:22:28,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:22:28,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:22:28,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:22:28,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:22:28,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:22:28,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:22:28,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:22:28,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:22:28,571 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:22:28,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:22:28,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:22:28,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:22:28,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:22:28,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:22:28,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:22:28,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:22:28,574 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:22:28,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:22:28,575 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:22:28,575 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:22:28,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:22:28,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:22:28,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:22:28,576 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:22:28,576 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:22:28,576 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:22:28,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:22:28,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:22:28,576 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:22:28,577 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:22:28,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:22:28,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:22:28,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:22:28,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:22:28,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:22:28,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:22:28,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:22:28,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:22:28,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:22:28,578 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:22:28,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:22:28,578 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:22:28,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:22:28,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:22:28,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:22:28,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:22:28,814 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:22:28,814 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:22:28,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 00:22:29,803 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:22:29,946 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:22:29,947 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 00:22:29,959 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e8ca5b85/7406eb9e93434ca0b467a8d10c6763c7/FLAG63aad0cae [2023-08-30 00:22:29,968 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e8ca5b85/7406eb9e93434ca0b467a8d10c6763c7 [2023-08-30 00:22:29,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:22:29,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:22:29,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:22:29,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:22:29,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:22:29,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:22:29" (1/1) ... [2023-08-30 00:22:29,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f1c38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:29, skipping insertion in model container [2023-08-30 00:22:29,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:22:29" (1/1) ... [2023-08-30 00:22:29,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:22:30,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:22:30,101 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/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-08-30 00:22:30,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:22:30,114 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 00:22:30,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36037540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:30, skipping insertion in model container [2023-08-30 00:22:30,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:22:30,115 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:22:30,116 INFO L158 Benchmark]: Toolchain (without parser) took 143.15ms. Allocated memory is still 79.7MB. Free memory was 60.4MB in the beginning and 50.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:22:30,117 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 79.7MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:22:30,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.73ms. Allocated memory is still 79.7MB. Free memory was 60.4MB in the beginning and 50.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:22:30,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 79.7MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.73ms. Allocated memory is still 79.7MB. Free memory was 60.4MB in the beginning and 50.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: 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/popl20-more-buffer-series2.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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:22:31,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:22:31,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:22:31,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:22:31,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:22:31,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:22:31,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:22:31,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:22:31,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:22:31,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:22:31,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:22:31,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:22:31,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:22:31,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:22:31,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:22:31,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:22:31,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:22:31,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:22:31,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:22:31,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:22:31,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:22:31,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:22:31,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:22:31,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:22:31,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:22:31,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:22:31,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:22:31,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:22:31,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:22:31,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:22:31,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:22:31,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:22:31,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:22:31,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:22:31,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:22:31,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:22:31,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:22:31,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:22:31,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:22:31,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:22:31,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:22:31,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:22:31,526 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:22:31,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:22:31,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:22:31,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:22:31,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:22:31,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:22:31,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:22:31,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:22:31,528 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:22:31,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:22:31,528 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:22:31,529 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:22:31,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:22:31,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:22:31,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:22:31,529 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:22:31,529 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:22:31,529 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:22:31,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:22:31,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:22:31,530 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:22:31,530 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:22:31,530 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:22:31,530 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:22:31,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:22:31,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:22:31,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:22:31,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:22:31,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:22:31,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:22:31,532 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:22:31,532 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:22:31,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:22:31,532 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:22:31,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:22:31,532 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:22:31,533 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:22:31,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:22:31,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:22:31,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:22:31,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:22:31,803 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:22:31,803 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:22:31,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 00:22:32,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:22:32,829 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:22:32,829 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-08-30 00:22:32,836 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcdfa326b/a766a719be27451da4cb258fb8ee6b0c/FLAG97e6e9a96 [2023-08-30 00:22:32,844 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcdfa326b/a766a719be27451da4cb258fb8ee6b0c [2023-08-30 00:22:32,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:22:32,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:22:32,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:22:32,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:22:32,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:22:32,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:22:32" (1/1) ... [2023-08-30 00:22:32,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a204469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:32, skipping insertion in model container [2023-08-30 00:22:32,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:22:32" (1/1) ... [2023-08-30 00:22:32,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:22:32,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:22:33,009 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/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-08-30 00:22:33,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:22:33,042 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:22:33,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:22:33,075 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/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-08-30 00:22:33,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:22:33,082 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:22:33,113 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/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-08-30 00:22:33,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:22:33,130 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:22:33,131 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:22:33,135 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:22:33,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33 WrapperNode [2023-08-30 00:22:33,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:22:33,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:22:33,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:22:33,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:22:33,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,212 INFO L138 Inliner]: procedures = 29, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 344 [2023-08-30 00:22:33,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:22:33,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:22:33,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:22:33,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:22:33,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,269 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:22:33,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:22:33,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:22:33,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:22:33,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (1/1) ... [2023-08-30 00:22:33,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:22:33,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:22:33,300 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 00:22:33,318 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 00:22:33,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:22:33,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:22:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:22:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:22:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:22:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:22:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:22:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:22:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:22:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:22:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:22:33,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:22:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:22:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:22:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:22:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:22:33,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:22:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:22:33,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:22:33,331 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 00:22:33,475 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:22:33,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:22:34,040 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:22:34,188 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:22:34,189 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 00:22:34,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:22:34 BoogieIcfgContainer [2023-08-30 00:22:34,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:22:34,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:22:34,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:22:34,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:22:34,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:22:32" (1/3) ... [2023-08-30 00:22:34,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2b9f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:22:34, skipping insertion in model container [2023-08-30 00:22:34,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:22:33" (2/3) ... [2023-08-30 00:22:34,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2b9f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:22:34, skipping insertion in model container [2023-08-30 00:22:34,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:22:34" (3/3) ... [2023-08-30 00:22:34,199 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-08-30 00:22:34,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:22:34,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 00:22:34,211 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:22:34,289 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:22:34,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 274 places, 283 transitions, 598 flow [2023-08-30 00:22:34,413 INFO L130 PetriNetUnfolder]: 22/279 cut-off events. [2023-08-30 00:22:34,414 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:22:34,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 279 events. 22/279 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 279 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-08-30 00:22:34,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 274 places, 283 transitions, 598 flow [2023-08-30 00:22:34,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 275 transitions, 574 flow [2023-08-30 00:22:34,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:22:34,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 275 transitions, 574 flow [2023-08-30 00:22:34,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 275 transitions, 574 flow [2023-08-30 00:22:34,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 275 transitions, 574 flow [2023-08-30 00:22:34,486 INFO L130 PetriNetUnfolder]: 22/275 cut-off events. [2023-08-30 00:22:34,486 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:22:34,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 275 events. 22/275 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 283 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-08-30 00:22:34,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 3860 [2023-08-30 00:23:05,360 WARN L222 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 144 DAG size of output: 143 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 00:23:05,712 INFO L134 LiptonReduction]: Checked pairs total: 6763 [2023-08-30 00:23:05,713 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-30 00:23:05,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:23:05,724 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;@70925256, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:23:05,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-08-30 00:23:05,726 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:23:05,726 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:05,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:05,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:05,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:23:05,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash 43525, now seen corresponding path program 1 times [2023-08-30 00:23:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808316782] [2023-08-30 00:23:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:05,740 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 00:23:05,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:05,743 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 00:23:05,744 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 00:23:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:23:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:06,054 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:23:06,055 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:23:06,076 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 00:23:06,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:06,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:06,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808316782] [2023-08-30 00:23:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808316782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:06,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:06,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730461943] [2023-08-30 00:23:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:06,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:06,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 570 [2023-08-30 00:23:06,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 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 00:23:06,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:06,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 570 [2023-08-30 00:23:06,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:10,046 INFO L130 PetriNetUnfolder]: 31011/38240 cut-off events. [2023-08-30 00:23:10,046 INFO L131 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2023-08-30 00:23:10,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76701 conditions, 38240 events. 31011/38240 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 2909. Compared 195022 event pairs, 19709 based on Foata normal form. 0/8099 useless extension candidates. Maximal degree in co-relation 69825. Up to 37645 conditions per place. [2023-08-30 00:23:10,348 INFO L137 encePairwiseOnDemand]: 563/570 looper letters, 61 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-30 00:23:10,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 284 flow [2023-08-30 00:23:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-30 00:23:10,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43450292397660817 [2023-08-30 00:23:10,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-30 00:23:10,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-30 00:23:10,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:10,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-30 00:23:10,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 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 00:23:10,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:23:10,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:23:10,385 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 172 flow. Second operand 3 states and 743 transitions. [2023-08-30 00:23:10,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 284 flow [2023-08-30 00:23:10,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:23:10,417 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 146 flow [2023-08-30 00:23:10,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-08-30 00:23:10,421 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -12 predicate places. [2023-08-30 00:23:10,421 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 146 flow [2023-08-30 00:23:10,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 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 00:23:10,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:10,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:10,432 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 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:10,629 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 00:23:10,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:23:10,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:10,633 INFO L85 PathProgramCache]: Analyzing trace with hash 43524, now seen corresponding path program 1 times [2023-08-30 00:23:10,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:10,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034796239] [2023-08-30 00:23:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:10,634 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 00:23:10,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:10,636 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 00:23:10,653 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 00:23:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:23:10,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:10,847 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:23:10,847 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:23:10,879 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 00:23:10,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:10,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:10,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034796239] [2023-08-30 00:23:10,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034796239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:10,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:10,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803627796] [2023-08-30 00:23:10,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:10,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:11,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 570 [2023-08-30 00:23:11,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 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 00:23:11,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:11,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 570 [2023-08-30 00:23:11,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:17,559 INFO L130 PetriNetUnfolder]: 62007/76462 cut-off events. [2023-08-30 00:23:17,559 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:17,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152341 conditions, 76462 events. 62007/76462 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5212. Compared 416257 event pairs, 39415 based on Foata normal form. 0/17080 useless extension candidates. Maximal degree in co-relation 152335. Up to 37641 conditions per place. [2023-08-30 00:23:17,917 INFO L137 encePairwiseOnDemand]: 561/570 looper letters, 114 selfloop transitions, 6 changer transitions 0/126 dead transitions. [2023-08-30 00:23:17,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 126 transitions, 510 flow [2023-08-30 00:23:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-08-30 00:23:17,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 00:23:17,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-08-30 00:23:17,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-08-30 00:23:17,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:17,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-08-30 00:23:17,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 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 00:23:17,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:23:17,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:23:17,926 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 146 flow. Second operand 3 states and 798 transitions. [2023-08-30 00:23:17,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 126 transitions, 510 flow [2023-08-30 00:23:17,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:17,929 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 195 flow [2023-08-30 00:23:17,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-08-30 00:23:17,929 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -9 predicate places. [2023-08-30 00:23:17,930 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 195 flow [2023-08-30 00:23:17,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 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 00:23:17,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:17,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:17,940 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 00:23:18,137 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 00:23:18,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:23:18,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1353150, now seen corresponding path program 1 times [2023-08-30 00:23:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:18,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626821915] [2023-08-30 00:23:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:18,141 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 00:23:18,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:18,142 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 00:23:18,144 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 00:23:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:18,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:23:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:18,338 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:23:18,338 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:23:18,394 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 00:23:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:18,536 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 00:23:18,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626821915] [2023-08-30 00:23:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626821915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:18,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:18,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:23:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825627141] [2023-08-30 00:23:18,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:18,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:23:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:23:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:23:19,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 570 [2023-08-30 00:23:19,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 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 00:23:19,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:19,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 570 [2023-08-30 00:23:19,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:30,275 INFO L130 PetriNetUnfolder]: 93013/114700 cut-off events. [2023-08-30 00:23:30,275 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:30,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228565 conditions, 114700 events. 93013/114700 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7572. Compared 649763 event pairs, 59121 based on Foata normal form. 0/26082 useless extension candidates. Maximal degree in co-relation 228556. Up to 37647 conditions per place. [2023-08-30 00:23:30,850 INFO L137 encePairwiseOnDemand]: 558/570 looper letters, 167 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2023-08-30 00:23:30,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 200 transitions, 895 flow [2023-08-30 00:23:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:23:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:23:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1463 transitions. [2023-08-30 00:23:30,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2023-08-30 00:23:30,854 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1463 transitions. [2023-08-30 00:23:30,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1463 transitions. [2023-08-30 00:23:30,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:30,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1463 transitions. [2023-08-30 00:23:30,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.83333333333334) internal successors, (1463), 6 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:30,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 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 00:23:30,862 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 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 00:23:30,862 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 195 flow. Second operand 6 states and 1463 transitions. [2023-08-30 00:23:30,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 200 transitions, 895 flow [2023-08-30 00:23:30,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 200 transitions, 871 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:30,865 INFO L231 Difference]: Finished difference. Result has 78 places, 94 transitions, 387 flow [2023-08-30 00:23:30,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=78, PETRI_TRANSITIONS=94} [2023-08-30 00:23:30,866 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -2 predicate places. [2023-08-30 00:23:30,866 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 387 flow [2023-08-30 00:23:30,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 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 00:23:30,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:30,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:23:30,874 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 00:23:31,073 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 00:23:31,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:23:31,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:31,074 INFO L85 PathProgramCache]: Analyzing trace with hash 41980588, now seen corresponding path program 1 times [2023-08-30 00:23:31,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:31,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170370239] [2023-08-30 00:23:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:31,075 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 00:23:31,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:31,075 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 00:23:31,076 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 00:23:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:31,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:23:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,311 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 00:23:31,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 00:23:31,349 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 00:23:31,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 145 [2023-08-30 00:23:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:23:31,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:31,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:23:31,677 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 00:23:31,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:31,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170370239] [2023-08-30 00:23:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170370239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:31,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:31,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:31,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23311948] [2023-08-30 00:23:31,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:31,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:31,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:31,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 570 [2023-08-30 00:23:31,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 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 00:23:31,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:31,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 570 [2023-08-30 00:23:31,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:39,603 INFO L130 PetriNetUnfolder]: 74559/92568 cut-off events. [2023-08-30 00:23:39,603 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 00:23:39,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184365 conditions, 92568 events. 74559/92568 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5988. Compared 523867 event pairs, 46947 based on Foata normal form. 0/21482 useless extension candidates. Maximal degree in co-relation 184352. Up to 90783 conditions per place. [2023-08-30 00:23:40,073 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 83 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-08-30 00:23:40,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 535 flow [2023-08-30 00:23:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-30 00:23:40,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450292397660819 [2023-08-30 00:23:40,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-30 00:23:40,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-30 00:23:40,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:40,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-30 00:23:40,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 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 00:23:40,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:23:40,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:23:40,081 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 387 flow. Second operand 3 states and 761 transitions. [2023-08-30 00:23:40,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 535 flow [2023-08-30 00:23:40,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 505 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:40,083 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 339 flow [2023-08-30 00:23:40,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2023-08-30 00:23:40,084 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2023-08-30 00:23:40,084 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 339 flow [2023-08-30 00:23:40,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 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 00:23:40,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:40,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:23:40,094 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 00:23:40,291 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 00:23:40,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:23:40,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash 41980586, now seen corresponding path program 1 times [2023-08-30 00:23:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:40,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731298776] [2023-08-30 00:23:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:40,293 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 00:23:40,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:40,293 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 00:23:40,294 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 00:23:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:23:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:40,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:40,489 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 00:23:40,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 00:23:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:41,042 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-30 00:23:41,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 00:23:41,699 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-30 00:23:41,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182 [2023-08-30 00:24:53,326 WARN L222 SmtUtils]: Spent 48.53s on a formula simplification. DAG size of input: 326 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:24:53,327 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 00:24:53,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:53,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731298776] [2023-08-30 00:24:53,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731298776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:53,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:53,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:24:53,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851142134] [2023-08-30 00:24:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:24:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:24:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 00:25:00,136 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] [2023-08-30 00:25:02,482 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] [2023-08-30 00:25:03,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 570 [2023-08-30 00:25:03,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 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 00:25:03,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:03,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 570 [2023-08-30 00:25:03,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:09,779 INFO L130 PetriNetUnfolder]: 56077/70408 cut-off events. [2023-08-30 00:25:09,779 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:25:09,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140019 conditions, 70408 events. 56077/70408 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4240. Compared 399859 event pairs, 34767 based on Foata normal form. 0/18647 useless extension candidates. Maximal degree in co-relation 140005. Up to 68623 conditions per place. [2023-08-30 00:25:10,162 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 79 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-30 00:25:10,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 479 flow [2023-08-30 00:25:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-30 00:25:10,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2023-08-30 00:25:10,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-30 00:25:10,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-30 00:25:10,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:10,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-30 00:25:10,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 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 00:25:10,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:25:10,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:25:10,169 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 339 flow. Second operand 3 states and 648 transitions. [2023-08-30 00:25:10,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 479 flow [2023-08-30 00:25:10,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 478 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:10,171 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 320 flow [2023-08-30 00:25:10,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2023-08-30 00:25:10,172 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2023-08-30 00:25:10,172 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 320 flow [2023-08-30 00:25:10,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 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 00:25:10,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:10,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:25:10,181 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 (6)] Ended with exit code 0 [2023-08-30 00:25:10,379 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 00:25:10,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:25:10,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1688671869, now seen corresponding path program 1 times [2023-08-30 00:25:10,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:10,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039013370] [2023-08-30 00:25:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:10,381 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 00:25:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:10,381 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 00:25:10,383 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 00:25:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:25:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:10,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:10,799 INFO L321 Elim1Store]: treesize reduction 150, result has 25.7 percent of original size [2023-08-30 00:25:10,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 172 treesize of output 206 [2023-08-30 00:25:10,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:10,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:10,916 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-08-30 00:25:10,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2023-08-30 00:25:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:10,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:25:11,010 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:25:11,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:25:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:11,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:25:11,128 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 00:25:11,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:11,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:11,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039013370] [2023-08-30 00:25:11,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039013370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:11,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:11,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:25:11,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742159803] [2023-08-30 00:25:11,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:11,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:25:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:25:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:25:11,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 570 [2023-08-30 00:25:11,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 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 00:25:11,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:11,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 570 [2023-08-30 00:25:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:17,902 INFO L130 PetriNetUnfolder]: 54304/68089 cut-off events. [2023-08-30 00:25:17,902 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:25:18,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135382 conditions, 68089 events. 54304/68089 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4098. Compared 383580 event pairs, 33462 based on Foata normal form. 0/18284 useless extension candidates. Maximal degree in co-relation 135367. Up to 66304 conditions per place. [2023-08-30 00:25:18,253 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 00:25:18,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 472 flow [2023-08-30 00:25:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-08-30 00:25:18,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43216374269005847 [2023-08-30 00:25:18,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-08-30 00:25:18,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-08-30 00:25:18,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:18,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-08-30 00:25:18,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 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 00:25:18,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:25:18,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:25:18,260 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 320 flow. Second operand 3 states and 739 transitions. [2023-08-30 00:25:18,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 84 transitions, 472 flow [2023-08-30 00:25:18,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:18,262 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 317 flow [2023-08-30 00:25:18,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2023-08-30 00:25:18,263 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2023-08-30 00:25:18,263 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 317 flow [2023-08-30 00:25:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 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 00:25:18,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:18,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:25:18,272 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 00:25:18,470 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 00:25:18,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:25:18,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1688671867, now seen corresponding path program 1 times [2023-08-30 00:25:18,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:18,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598984687] [2023-08-30 00:25:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:18,473 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 00:25:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:18,474 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 00:25:18,475 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 00:25:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:25:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:18,656 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 00:25:18,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 00:25:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:25:18,832 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 00:25:18,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 00:25:18,953 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 00:25:18,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 00:25:19,050 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 00:25:19,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:25:19,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:19,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598984687] [2023-08-30 00:25:19,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598984687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:25:19,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:25:19,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:25:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748605551] [2023-08-30 00:25:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:25:19,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:25:19,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:19,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:25:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:25:19,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 570 [2023-08-30 00:25:19,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 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 00:25:19,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:19,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 570 [2023-08-30 00:25:19,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:25,126 INFO L130 PetriNetUnfolder]: 52531/65770 cut-off events. [2023-08-30 00:25:25,126 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:25:25,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130745 conditions, 65770 events. 52531/65770 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3956. Compared 367809 event pairs, 32157 based on Foata normal form. 0/17921 useless extension candidates. Maximal degree in co-relation 130729. Up to 63985 conditions per place. [2023-08-30 00:25:25,481 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 75 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 00:25:25,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 465 flow [2023-08-30 00:25:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-30 00:25:25,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439766081871345 [2023-08-30 00:25:25,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-30 00:25:25,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-30 00:25:25,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:25,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-30 00:25:25,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 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 00:25:25,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:25:25,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:25:25,487 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 317 flow. Second operand 3 states and 752 transitions. [2023-08-30 00:25:25,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 465 flow [2023-08-30 00:25:25,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:25,489 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 314 flow [2023-08-30 00:25:25,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2023-08-30 00:25:25,489 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -6 predicate places. [2023-08-30 00:25:25,490 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 314 flow [2023-08-30 00:25:25,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 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 00:25:25,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:25,490 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:25:25,497 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 00:25:25,692 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 00:25:25,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:25:25,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1660864644, now seen corresponding path program 2 times [2023-08-30 00:25:25,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:25,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188880979] [2023-08-30 00:25:25,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:25:25,696 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 00:25:25,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:25,698 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 00:25:25,698 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 00:25:25,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:25:25,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:25:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:25:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:25,902 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:25:25,903 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:25:26,005 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 00:25:26,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:26,458 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 00:25:26,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:26,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188880979] [2023-08-30 00:25:26,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188880979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:26,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:26,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:25:26,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543414239] [2023-08-30 00:25:26,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:25:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:25:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:25:30,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 570 [2023-08-30 00:25:30,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 314 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 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 00:25:30,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:30,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 570 [2023-08-30 00:25:30,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:32,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:33,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:35,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:37,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:39,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:41,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:44,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:46,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:49,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:50,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:26:15,018 INFO L130 PetriNetUnfolder]: 174958/219065 cut-off events. [2023-08-30 00:26:15,018 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 00:26:15,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435352 conditions, 219065 events. 174958/219065 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 9053. Compared 1335291 event pairs, 107163 based on Foata normal form. 17/63223 useless extension candidates. Maximal degree in co-relation 435335. Up to 21341 conditions per place. [2023-08-30 00:26:16,462 INFO L137 encePairwiseOnDemand]: 560/570 looper letters, 458 selfloop transitions, 53 changer transitions 0/517 dead transitions. [2023-08-30 00:26:16,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 517 transitions, 2438 flow [2023-08-30 00:26:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:26:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:26:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3723 transitions. [2023-08-30 00:26:16,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543859649122807 [2023-08-30 00:26:16,470 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3723 transitions. [2023-08-30 00:26:16,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3723 transitions. [2023-08-30 00:26:16,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:16,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3723 transitions. [2023-08-30 00:26:16,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 248.2) internal successors, (3723), 15 states have internal predecessors, (3723), 0 states have call successors, (0), 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 00:26:16,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 570.0) internal successors, (9120), 16 states have internal predecessors, (9120), 0 states have call successors, (0), 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 00:26:16,483 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 570.0) internal successors, (9120), 16 states have internal predecessors, (9120), 0 states have call successors, (0), 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 00:26:16,484 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 314 flow. Second operand 15 states and 3723 transitions. [2023-08-30 00:26:16,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 517 transitions, 2438 flow [2023-08-30 00:26:16,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 517 transitions, 2437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:26:16,489 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 713 flow [2023-08-30 00:26:16,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=713, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2023-08-30 00:26:16,490 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 17 predicate places. [2023-08-30 00:26:16,490 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 713 flow [2023-08-30 00:26:16,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 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 00:26:16,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:16,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:16,498 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 (9)] Ended with exit code 0 [2023-08-30 00:26:16,698 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 00:26:16,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:26:16,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash 809212574, now seen corresponding path program 1 times [2023-08-30 00:26:16,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:16,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683261828] [2023-08-30 00:26:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:16,701 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 00:26:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:16,702 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 00:26:16,704 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 00:26:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:26:16,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:16,818 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 00:26:16,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:26:16,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683261828] [2023-08-30 00:26:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683261828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:26:16,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:26:16,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:26:16,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940777229] [2023-08-30 00:26:16,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:26:16,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:26:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:26:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:26:16,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 570 [2023-08-30 00:26:16,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 713 flow. Second operand has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 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 00:26:16,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:16,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 570 [2023-08-30 00:26:16,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:40,736 INFO L130 PetriNetUnfolder]: 192716/243828 cut-off events. [2023-08-30 00:26:40,737 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2023-08-30 00:26:41,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484909 conditions, 243828 events. 192716/243828 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 9020. Compared 1539034 event pairs, 119700 based on Foata normal form. 0/75395 useless extension candidates. Maximal degree in co-relation 484881. Up to 213090 conditions per place. [2023-08-30 00:26:42,687 INFO L137 encePairwiseOnDemand]: 559/570 looper letters, 181 selfloop transitions, 3 changer transitions 0/190 dead transitions. [2023-08-30 00:26:42,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 190 transitions, 1538 flow [2023-08-30 00:26:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:26:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:26:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1014 transitions. [2023-08-30 00:26:42,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2023-08-30 00:26:42,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1014 transitions. [2023-08-30 00:26:42,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1014 transitions. [2023-08-30 00:26:42,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:42,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1014 transitions. [2023-08-30 00:26:42,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.5) internal successors, (1014), 4 states have internal predecessors, (1014), 0 states have call successors, (0), 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 00:26:42,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 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 00:26:42,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 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 00:26:42,705 INFO L175 Difference]: Start difference. First operand has 97 places, 114 transitions, 713 flow. Second operand 4 states and 1014 transitions. [2023-08-30 00:26:42,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 190 transitions, 1538 flow [2023-08-30 00:26:42,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 190 transitions, 1373 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-08-30 00:26:42,710 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 634 flow [2023-08-30 00:26:42,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=634, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2023-08-30 00:26:42,711 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 17 predicate places. [2023-08-30 00:26:42,711 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 634 flow [2023-08-30 00:26:42,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 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 00:26:42,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:42,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:42,721 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 (10)] Ended with exit code 0 [2023-08-30 00:26:42,918 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 00:26:42,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:26:42,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:42,919 INFO L85 PathProgramCache]: Analyzing trace with hash -683939199, now seen corresponding path program 1 times [2023-08-30 00:26:42,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:42,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428961526] [2023-08-30 00:26:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:42,920 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 00:26:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:42,920 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 00:26:42,922 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 00:26:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:43,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:26:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:26:43,121 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-08-30 00:26:43,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2023-08-30 00:26:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:26:43,414 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2023-08-30 00:26:43,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 00:26:43,920 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2023-08-30 00:26:43,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 00:26:44,238 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 00:26:44,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:26:44,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428961526] [2023-08-30 00:26:44,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428961526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:26:44,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:26:44,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:26:44,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426120932] [2023-08-30 00:26:44,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:26:44,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:26:44,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:26:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:26:45,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 570 [2023-08-30 00:26:45,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 634 flow. Second operand has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 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 00:26:45,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:45,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 570 [2023-08-30 00:26:45,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:08,742 INFO L130 PetriNetUnfolder]: 190416/240548 cut-off events. [2023-08-30 00:27:08,742 INFO L131 PetriNetUnfolder]: For 17616/17616 co-relation queries the response was YES. [2023-08-30 00:27:09,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552591 conditions, 240548 events. 190416/240548 cut-off events. For 17616/17616 co-relation queries the response was YES. Maximal size of possible extension queue 9428. Compared 1521109 event pairs, 118250 based on Foata normal form. 0/87398 useless extension candidates. Maximal degree in co-relation 552561. Up to 233868 conditions per place. [2023-08-30 00:27:10,621 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 105 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-08-30 00:27:10,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 112 transitions, 842 flow [2023-08-30 00:27:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:27:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:27:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 744 transitions. [2023-08-30 00:27:10,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43508771929824563 [2023-08-30 00:27:10,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 744 transitions. [2023-08-30 00:27:10,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 744 transitions. [2023-08-30 00:27:10,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:10,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 744 transitions. [2023-08-30 00:27:10,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 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 00:27:10,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:27:10,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 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 00:27:10,626 INFO L175 Difference]: Start difference. First operand has 97 places, 114 transitions, 634 flow. Second operand 3 states and 744 transitions. [2023-08-30 00:27:10,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 112 transitions, 842 flow [2023-08-30 00:27:10,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 112 transitions, 836 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:27:10,636 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 626 flow [2023-08-30 00:27:10,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2023-08-30 00:27:10,637 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 16 predicate places. [2023-08-30 00:27:10,637 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 626 flow [2023-08-30 00:27:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 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 00:27:10,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:10,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:27:10,647 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 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:10,847 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 00:27:10,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:27:10,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash -683939198, now seen corresponding path program 1 times [2023-08-30 00:27:10,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:10,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258293256] [2023-08-30 00:27:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:10,848 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 00:27:10,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:10,849 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 00:27:10,850 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 00:27:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:10,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:27:10,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:10,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:10,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:11,105 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2023-08-30 00:27:11,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 53 [2023-08-30 00:27:11,120 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 60 treesize of output 58 [2023-08-30 00:27:11,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:11,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:27:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:11,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:27:11,292 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 00:27:11,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:27:11,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:11,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258293256] [2023-08-30 00:27:11,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258293256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:27:11,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:27:11,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:27:11,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124262245] [2023-08-30 00:27:11,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:27:11,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:27:11,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:27:11,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:27:11,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 570 [2023-08-30 00:27:11,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 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 00:27:11,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:11,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 570 [2023-08-30 00:27:11,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand