./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:11:50,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:11:50,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:11:50,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:11:50,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:11:50,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:11:50,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:11:50,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:11:50,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:11:50,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:11:50,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:11:50,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:11:50,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:11:50,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:11:50,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:11:50,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:11:50,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:11:50,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:11:50,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:11:50,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:11:50,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:11:50,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:11:50,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:11:50,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:11:50,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:11:50,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:11:50,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:11:50,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:11:50,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:11:50,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:11:50,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:11:50,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:11:50,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:11:50,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:11:50,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:11:50,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:11:50,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:11:50,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:11:50,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:11:50,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:11:50,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:11:50,469 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:11:50,501 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:11:50,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:11:50,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:11:50,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:11:50,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:11:50,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:11:50,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:11:50,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:11:50,505 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:11:50,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:11:50,506 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:11:50,506 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:11:50,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:11:50,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:11:50,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:11:50,507 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:11:50,507 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:11:50,507 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:11:50,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:11:50,508 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:11:50,508 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:11:50,508 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:11:50,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:11:50,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:11:50,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:11:50,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:11:50,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:11:50,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:11:50,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:11:50,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:11:50,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:11:50,510 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:11:50,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:11:50,511 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:11:50,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:11:50,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:11:50,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:11:50,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:11:50,840 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:11:50,840 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:11:50,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-09-01 04:11:52,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:11:52,243 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:11:52,243 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-09-01 04:11:52,250 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146bd76ac/861fdd9b5f5d4e629964963445193390/FLAGcf5012454 [2023-09-01 04:11:52,283 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146bd76ac/861fdd9b5f5d4e629964963445193390 [2023-09-01 04:11:52,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:11:52,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:11:52,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:52,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:11:52,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:11:52,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:52" (1/1) ... [2023-09-01 04:11:52,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@537d7502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:52, skipping insertion in model container [2023-09-01 04:11:52,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:52" (1/1) ... [2023-09-01 04:11:52,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:11:52,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:11:52,497 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-09-01 04:11:52,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:52,517 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) [2023-09-01 04:11:52,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3abd0b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:52, skipping insertion in model container [2023-09-01 04:11:52,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:52,521 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:11:52,522 INFO L158 Benchmark]: Toolchain (without parser) took 234.83ms. Allocated memory is still 65.0MB. Free memory was 45.6MB in the beginning and 36.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 04:11:52,523 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory is still 29.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:11:52,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.77ms. Allocated memory is still 65.0MB. Free memory was 45.4MB in the beginning and 36.0MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 04:11:52,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory is still 29.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.77ms. Allocated memory is still 65.0MB. Free memory was 45.4MB in the beginning and 36.0MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:11:54,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:11:54,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:11:54,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:11:54,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:11:54,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:11:54,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:11:54,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:11:54,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:11:54,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:11:54,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:11:54,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:11:54,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:11:54,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:11:54,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:11:54,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:11:54,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:11:54,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:11:54,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:11:54,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:11:54,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:11:54,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:11:54,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:11:54,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:11:54,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:11:54,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:11:54,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:11:54,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:11:54,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:11:54,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:11:54,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:11:54,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:11:54,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:11:54,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:11:54,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:11:54,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:11:54,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:11:54,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:11:54,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:11:54,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:11:54,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:11:54,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:11:54,346 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:11:54,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:11:54,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:11:54,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:11:54,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:11:54,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:11:54,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:11:54,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:11:54,351 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:11:54,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:11:54,352 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:11:54,352 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:11:54,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:11:54,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:11:54,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:11:54,353 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:11:54,353 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:11:54,353 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:11:54,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:11:54,354 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:11:54,354 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:11:54,354 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:11:54,354 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:11:54,354 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:11:54,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:11:54,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:11:54,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:11:54,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:11:54,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:11:54,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:11:54,356 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:11:54,356 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:11:54,356 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:11:54,357 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:11:54,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:11:54,357 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:11:54,357 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:11:54,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:11:54,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:11:54,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:11:54,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:11:54,680 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:11:54,680 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:11:54,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-09-01 04:11:55,961 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:11:56,158 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:11:56,159 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-09-01 04:11:56,164 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42739bd22/8987899a97d44ca38a0f7ec00c59d0ab/FLAGc404e85c8 [2023-09-01 04:11:56,549 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42739bd22/8987899a97d44ca38a0f7ec00c59d0ab [2023-09-01 04:11:56,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:11:56,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:11:56,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:56,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:11:56,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:11:56,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e435cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56, skipping insertion in model container [2023-09-01 04:11:56,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:11:56,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:11:56,751 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-09-01 04:11:56,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:56,787 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:11:56,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:11:56,817 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-09-01 04:11:56,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:56,835 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:11:56,874 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-09-01 04:11:56,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:56,892 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:11:56,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56 WrapperNode [2023-09-01 04:11:56,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:56,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:11:56,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:11:56,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:11:56,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,954 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 145 [2023-09-01 04:11:56,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:11:56,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:11:56,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:11:56,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:11:56,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:56,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:57,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:57,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:57,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:57,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:11:57,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:11:57,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:11:57,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:11:57,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (1/1) ... [2023-09-01 04:11:57,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:11:57,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:11:57,046 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) [2023-09-01 04:11:57,058 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 [2023-09-01 04:11:57,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:11:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:11:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:11:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:11:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:11:57,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:11:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:11:57,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:11:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:11:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:11:57,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:11:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:11:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:11:57,088 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:11:57,256 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:11:57,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:11:57,639 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:11:57,647 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:11:57,650 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:11:57,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:11:57 BoogieIcfgContainer [2023-09-01 04:11:57,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:11:57,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:11:57,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:11:57,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:11:57,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:11:56" (1/3) ... [2023-09-01 04:11:57,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df1de63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:11:57, skipping insertion in model container [2023-09-01 04:11:57,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:56" (2/3) ... [2023-09-01 04:11:57,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df1de63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:11:57, skipping insertion in model container [2023-09-01 04:11:57,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:11:57" (3/3) ... [2023-09-01 04:11:57,660 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-09-01 04:11:57,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:11:57,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-09-01 04:11:57,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:11:57,833 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:11:57,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 190 transitions, 396 flow [2023-09-01 04:11:57,966 INFO L130 PetriNetUnfolder]: 15/188 cut-off events. [2023-09-01 04:11:57,966 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:11:57,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 15/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 262 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 04:11:57,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 190 transitions, 396 flow [2023-09-01 04:11:57,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 184 transitions, 380 flow [2023-09-01 04:11:57,985 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:11:57,999 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 184 transitions, 380 flow [2023-09-01 04:11:58,002 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 184 transitions, 380 flow [2023-09-01 04:11:58,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 184 transitions, 380 flow [2023-09-01 04:11:58,052 INFO L130 PetriNetUnfolder]: 15/184 cut-off events. [2023-09-01 04:11:58,053 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:11:58,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 15/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 244 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 04:11:58,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 3708 [2023-09-01 04:12:14,830 INFO L134 LiptonReduction]: Checked pairs total: 3611 [2023-09-01 04:12:14,830 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-09-01 04:12:14,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:12:14,847 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;@67dddb78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:12:14,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-09-01 04:12:14,850 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:12:14,851 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:12:14,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:14,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:12:14,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:14,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 23967, now seen corresponding path program 1 times [2023-09-01 04:12:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:14,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965097947] [2023-09-01 04:12:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:14,867 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 [2023-09-01 04:12:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:14,881 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) [2023-09-01 04:12:14,889 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 [2023-09-01 04:12:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:12:14,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:15,099 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:12:15,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:12:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:15,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:15,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:15,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965097947] [2023-09-01 04:12:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965097947] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:15,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:15,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:15,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945114582] [2023-09-01 04:12:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:15,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:15,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:15,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-09-01 04:12:15,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:15,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:15,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-09-01 04:12:15,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:15,579 INFO L130 PetriNetUnfolder]: 457/652 cut-off events. [2023-09-01 04:12:15,579 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 04:12:15,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 652 events. 457/652 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 2728 event pairs, 216 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 1138. Up to 646 conditions per place. [2023-09-01 04:12:15,585 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 04:12:15,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 136 flow [2023-09-01 04:12:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-09-01 04:12:15,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503367003367003 [2023-09-01 04:12:15,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-09-01 04:12:15,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-09-01 04:12:15,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:15,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-09-01 04:12:15,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:15,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:15,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:15,631 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 84 flow. Second operand 3 states and 535 transitions. [2023-09-01 04:12:15,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 136 flow [2023-09-01 04:12:15,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:12:15,636 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-09-01 04:12:15,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-09-01 04:12:15,641 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-09-01 04:12:15,641 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-09-01 04:12:15,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:15,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:15,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:12:15,656 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 [2023-09-01 04:12:15,852 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 [2023-09-01 04:12:15,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:15,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 24051, now seen corresponding path program 1 times [2023-09-01 04:12:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904010789] [2023-09-01 04:12:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:15,854 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 [2023-09-01 04:12:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:15,856 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) [2023-09-01 04:12:15,861 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 [2023-09-01 04:12:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:12:15,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:15,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:15,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904010789] [2023-09-01 04:12:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904010789] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:15,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:15,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:15,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927709381] [2023-09-01 04:12:15,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:15,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:15,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:15,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 396 [2023-09-01 04:12:15,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:15,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:15,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 396 [2023-09-01 04:12:15,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:16,258 INFO L130 PetriNetUnfolder]: 457/654 cut-off events. [2023-09-01 04:12:16,258 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:12:16,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312 conditions, 654 events. 457/654 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 2755 event pairs, 216 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 1306. Up to 647 conditions per place. [2023-09-01 04:12:16,262 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-09-01 04:12:16,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 138 flow [2023-09-01 04:12:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-09-01 04:12:16,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562289562289562 [2023-09-01 04:12:16,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-09-01 04:12:16,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-09-01 04:12:16,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:16,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-09-01 04:12:16,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:16,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:16,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:16,272 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 542 transitions. [2023-09-01 04:12:16,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 138 flow [2023-09-01 04:12:16,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:16,273 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 85 flow [2023-09-01 04:12:16,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-09-01 04:12:16,274 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-09-01 04:12:16,274 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 85 flow [2023-09-01 04:12:16,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:16,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:16,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:12:16,286 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 [2023-09-01 04:12:16,484 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 [2023-09-01 04:12:16,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:16,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:16,485 INFO L85 PathProgramCache]: Analyzing trace with hash 23966, now seen corresponding path program 1 times [2023-09-01 04:12:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:16,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825828243] [2023-09-01 04:12:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:16,486 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 [2023-09-01 04:12:16,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:16,487 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) [2023-09-01 04:12:16,512 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 [2023-09-01 04:12:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:12:16,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:16,604 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:16,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:16,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:16,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:16,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825828243] [2023-09-01 04:12:16,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825828243] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:16,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:16,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:16,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304349204] [2023-09-01 04:12:16,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:16,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:16,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:16,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-09-01 04:12:16,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:16,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:16,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-09-01 04:12:16,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:17,038 INFO L130 PetriNetUnfolder]: 457/653 cut-off events. [2023-09-01 04:12:17,039 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:12:17,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 653 events. 457/653 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 2718 event pairs, 216 based on Foata normal form. 1/156 useless extension candidates. Maximal degree in co-relation 1310. Up to 647 conditions per place. [2023-09-01 04:12:17,043 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-09-01 04:12:17,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 147 flow [2023-09-01 04:12:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-09-01 04:12:17,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44865319865319864 [2023-09-01 04:12:17,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-09-01 04:12:17,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-09-01 04:12:17,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:17,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-09-01 04:12:17,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:17,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:17,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:17,050 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 85 flow. Second operand 3 states and 533 transitions. [2023-09-01 04:12:17,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 147 flow [2023-09-01 04:12:17,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 143 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:17,052 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 89 flow [2023-09-01 04:12:17,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-09-01 04:12:17,053 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-09-01 04:12:17,053 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 89 flow [2023-09-01 04:12:17,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:17,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:17,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:12:17,067 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 [2023-09-01 04:12:17,262 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 [2023-09-01 04:12:17,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:17,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash 745832, now seen corresponding path program 1 times [2023-09-01 04:12:17,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:17,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154115283] [2023-09-01 04:12:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:17,264 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 [2023-09-01 04:12:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:17,265 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) [2023-09-01 04:12:17,268 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 [2023-09-01 04:12:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:12:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:17,375 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:17,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:17,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:17,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154115283] [2023-09-01 04:12:17,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154115283] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:17,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:17,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:12:17,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704568022] [2023-09-01 04:12:17,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:17,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:12:17,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:12:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:12:18,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2023-09-01 04:12:18,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 89 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:18,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:18,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2023-09-01 04:12:18,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:19,117 INFO L130 PetriNetUnfolder]: 919/1311 cut-off events. [2023-09-01 04:12:19,118 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:12:19,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 1311 events. 919/1311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 6221 event pairs, 432 based on Foata normal form. 3/327 useless extension candidates. Maximal degree in co-relation 2639. Up to 650 conditions per place. [2023-09-01 04:12:19,125 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 56 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2023-09-01 04:12:19,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 323 flow [2023-09-01 04:12:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:12:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:12:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1042 transitions. [2023-09-01 04:12:19,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385521885521885 [2023-09-01 04:12:19,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1042 transitions. [2023-09-01 04:12:19,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1042 transitions. [2023-09-01 04:12:19,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:19,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1042 transitions. [2023-09-01 04:12:19,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.66666666666666) internal successors, (1042), 6 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,137 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,137 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 89 flow. Second operand 6 states and 1042 transitions. [2023-09-01 04:12:19,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 323 flow [2023-09-01 04:12:19,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:12:19,140 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 183 flow [2023-09-01 04:12:19,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-09-01 04:12:19,141 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-09-01 04:12:19,141 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 183 flow [2023-09-01 04:12:19,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:19,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:12:19,154 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 (5)] Ended with exit code 0 [2023-09-01 04:12:19,352 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 [2023-09-01 04:12:19,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:19,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash 745917, now seen corresponding path program 1 times [2023-09-01 04:12:19,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:19,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180804048] [2023-09-01 04:12:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:19,354 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 [2023-09-01 04:12:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:19,355 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) [2023-09-01 04:12:19,358 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 [2023-09-01 04:12:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:12:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:19,459 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-09-01 04:12:19,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 04:12:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:19,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:19,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:19,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180804048] [2023-09-01 04:12:19,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180804048] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:19,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:19,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:19,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147446990] [2023-09-01 04:12:19,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:19,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:19,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:19,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-09-01 04:12:19,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:19,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-09-01 04:12:19,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:19,859 INFO L130 PetriNetUnfolder]: 695/1015 cut-off events. [2023-09-01 04:12:19,859 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 04:12:19,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2083 conditions, 1015 events. 695/1015 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 4789 event pairs, 326 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 2069. Up to 1003 conditions per place. [2023-09-01 04:12:19,865 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-09-01 04:12:19,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 229 flow [2023-09-01 04:12:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-09-01 04:12:19,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-09-01 04:12:19,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-09-01 04:12:19,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-09-01 04:12:19,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:19,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-09-01 04:12:19,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,882 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 183 flow. Second operand 3 states and 522 transitions. [2023-09-01 04:12:19,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 229 flow [2023-09-01 04:12:19,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 213 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:19,886 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 143 flow [2023-09-01 04:12:19,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-09-01 04:12:19,888 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-09-01 04:12:19,889 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 143 flow [2023-09-01 04:12:19,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:19,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:19,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:12:19,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:20,098 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 [2023-09-01 04:12:20,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:20,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:20,099 INFO L85 PathProgramCache]: Analyzing trace with hash 745918, now seen corresponding path program 1 times [2023-09-01 04:12:20,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:20,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277367734] [2023-09-01 04:12:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:20,100 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 [2023-09-01 04:12:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:20,102 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) [2023-09-01 04:12:20,103 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 [2023-09-01 04:12:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 04:12:20,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:12:20,235 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-09-01 04:12:20,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-09-01 04:12:20,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 04:12:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:20,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:20,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:20,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277367734] [2023-09-01 04:12:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277367734] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:20,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:20,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977274805] [2023-09-01 04:12:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:20,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:20,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-09-01 04:12:20,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:20,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:20,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-09-01 04:12:20,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:20,671 INFO L130 PetriNetUnfolder]: 471/719 cut-off events. [2023-09-01 04:12:20,671 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:12:20,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 719 events. 471/719 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 3349 event pairs, 220 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 1460. Up to 707 conditions per place. [2023-09-01 04:12:20,675 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-09-01 04:12:20,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 185 flow [2023-09-01 04:12:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2023-09-01 04:12:20,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452861952861953 [2023-09-01 04:12:20,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2023-09-01 04:12:20,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2023-09-01 04:12:20,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:20,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2023-09-01 04:12:20,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:20,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:20,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:20,682 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 143 flow. Second operand 3 states and 529 transitions. [2023-09-01 04:12:20,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 34 transitions, 185 flow [2023-09-01 04:12:20,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:20,684 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 122 flow [2023-09-01 04:12:20,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-09-01 04:12:20,685 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-09-01 04:12:20,685 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 122 flow [2023-09-01 04:12:20,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:20,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:20,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:12:20,697 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 (7)] Ended with exit code 0 [2023-09-01 04:12:20,897 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 [2023-09-01 04:12:20,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:20,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash 716841913, now seen corresponding path program 1 times [2023-09-01 04:12:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221528527] [2023-09-01 04:12:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:20,898 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 [2023-09-01 04:12:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:20,899 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) [2023-09-01 04:12:20,900 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 [2023-09-01 04:12:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:12:20,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:21,000 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 04:12:21,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-09-01 04:12:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:21,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:21,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:21,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221528527] [2023-09-01 04:12:21,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221528527] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:21,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:21,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:21,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786990556] [2023-09-01 04:12:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:21,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:21,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:21,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:21,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-09-01 04:12:21,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:21,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:21,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-09-01 04:12:21,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:21,337 INFO L130 PetriNetUnfolder]: 433/657 cut-off events. [2023-09-01 04:12:21,337 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:12:21,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 657 events. 433/657 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 3005 event pairs, 202 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 1336. Up to 645 conditions per place. [2023-09-01 04:12:21,342 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 04:12:21,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 178 flow [2023-09-01 04:12:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-09-01 04:12:21,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43602693602693604 [2023-09-01 04:12:21,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-09-01 04:12:21,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-09-01 04:12:21,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:21,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-09-01 04:12:21,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:21,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:21,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:21,349 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 122 flow. Second operand 3 states and 518 transitions. [2023-09-01 04:12:21,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 178 flow [2023-09-01 04:12:21,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:21,350 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 119 flow [2023-09-01 04:12:21,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-09-01 04:12:21,351 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-09-01 04:12:21,351 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 119 flow [2023-09-01 04:12:21,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:21,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:21,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:12:21,368 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 [2023-09-01 04:12:21,561 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 [2023-09-01 04:12:21,562 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:21,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash 716841914, now seen corresponding path program 1 times [2023-09-01 04:12:21,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:21,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719393906] [2023-09-01 04:12:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:21,563 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 [2023-09-01 04:12:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:21,564 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) [2023-09-01 04:12:21,565 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 [2023-09-01 04:12:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:12:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:21,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:12:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:12:21,674 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 04:12:21,675 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 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 04:12:21,681 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 14 treesize of output 12 [2023-09-01 04:12:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:21,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:21,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:21,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719393906] [2023-09-01 04:12:21,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719393906] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:21,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:21,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184331337] [2023-09-01 04:12:21,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:21,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:21,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:21,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:21,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:21,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-09-01 04:12:21,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:21,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:21,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-09-01 04:12:21,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:22,007 INFO L130 PetriNetUnfolder]: 395/595 cut-off events. [2023-09-01 04:12:22,008 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:12:22,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1229 conditions, 595 events. 395/595 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 2621 event pairs, 184 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 1212. Up to 583 conditions per place. [2023-09-01 04:12:22,011 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 04:12:22,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 171 flow [2023-09-01 04:12:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-09-01 04:12:22,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2023-09-01 04:12:22,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-09-01 04:12:22,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-09-01 04:12:22,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:22,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-09-01 04:12:22,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:22,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:22,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:22,017 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 119 flow. Second operand 3 states and 525 transitions. [2023-09-01 04:12:22,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 171 flow [2023-09-01 04:12:22,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:22,019 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 116 flow [2023-09-01 04:12:22,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-09-01 04:12:22,020 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-09-01 04:12:22,020 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 116 flow [2023-09-01 04:12:22,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:22,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:22,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:12:22,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:22,230 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 [2023-09-01 04:12:22,230 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:22,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash 747110430, now seen corresponding path program 2 times [2023-09-01 04:12:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:22,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116801208] [2023-09-01 04:12:22,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:12:22,232 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 [2023-09-01 04:12:22,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:22,233 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) [2023-09-01 04:12:22,235 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 [2023-09-01 04:12:22,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:12:22,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 04:12:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:22,365 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:22,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:22,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:23,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:23,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116801208] [2023-09-01 04:12:23,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116801208] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:23,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:23,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:12:23,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968175208] [2023-09-01 04:12:23,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:23,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:12:23,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:12:23,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:12:25,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2023-09-01 04:12:25,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 116 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:25,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:25,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2023-09-01 04:12:25,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:29,378 INFO L130 PetriNetUnfolder]: 1766/2651 cut-off events. [2023-09-01 04:12:29,378 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-09-01 04:12:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5360 conditions, 2651 events. 1766/2651 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14337 event pairs, 828 based on Foata normal form. 6/1014 useless extension candidates. Maximal degree in co-relation 5342. Up to 289 conditions per place. [2023-09-01 04:12:29,391 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 173 selfloop transitions, 12 changer transitions 0/187 dead transitions. [2023-09-01 04:12:29,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 187 transitions, 874 flow [2023-09-01 04:12:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:12:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:12:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2147 transitions. [2023-09-01 04:12:29,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45180976430976433 [2023-09-01 04:12:29,400 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2147 transitions. [2023-09-01 04:12:29,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2147 transitions. [2023-09-01 04:12:29,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:29,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2147 transitions. [2023-09-01 04:12:29,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 178.91666666666666) internal successors, (2147), 12 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:29,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 396.0) internal successors, (5148), 13 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:29,413 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 396.0) internal successors, (5148), 13 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:29,413 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 116 flow. Second operand 12 states and 2147 transitions. [2023-09-01 04:12:29,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 187 transitions, 874 flow [2023-09-01 04:12:29,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 187 transitions, 873 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:29,421 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 201 flow [2023-09-01 04:12:29,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=201, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-09-01 04:12:29,423 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2023-09-01 04:12:29,423 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 201 flow [2023-09-01 04:12:29,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:29,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:29,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:12:29,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:29,633 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 [2023-09-01 04:12:29,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:29,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash 747256410, now seen corresponding path program 1 times [2023-09-01 04:12:29,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:29,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035068150] [2023-09-01 04:12:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:29,635 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 [2023-09-01 04:12:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:29,636 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) [2023-09-01 04:12:29,640 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 [2023-09-01 04:12:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:12:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:29,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:29,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-09-01 04:12:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:30,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:30,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035068150] [2023-09-01 04:12:30,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035068150] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:30,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:30,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:12:30,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362693698] [2023-09-01 04:12:30,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:30,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:12:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:12:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:12:31,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 396 [2023-09-01 04:12:31,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 201 flow. Second operand has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:31,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:31,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 396 [2023-09-01 04:12:31,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:32,164 INFO L130 PetriNetUnfolder]: 2333/3659 cut-off events. [2023-09-01 04:12:32,164 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-09-01 04:12:32,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7451 conditions, 3659 events. 2333/3659 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23221 event pairs, 522 based on Foata normal form. 0/1469 useless extension candidates. Maximal degree in co-relation 7425. Up to 2260 conditions per place. [2023-09-01 04:12:32,190 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 59 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2023-09-01 04:12:32,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 420 flow [2023-09-01 04:12:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:12:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:12:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1173 transitions. [2023-09-01 04:12:32,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231601731601732 [2023-09-01 04:12:32,195 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1173 transitions. [2023-09-01 04:12:32,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1173 transitions. [2023-09-01 04:12:32,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:32,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1173 transitions. [2023-09-01 04:12:32,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.57142857142858) internal successors, (1173), 7 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:32,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 396.0) internal successors, (3168), 8 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:32,204 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 396.0) internal successors, (3168), 8 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:32,204 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 201 flow. Second operand 7 states and 1173 transitions. [2023-09-01 04:12:32,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 420 flow [2023-09-01 04:12:32,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 407 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 04:12:32,208 INFO L231 Difference]: Finished difference. Result has 62 places, 40 transitions, 233 flow [2023-09-01 04:12:32,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=62, PETRI_TRANSITIONS=40} [2023-09-01 04:12:32,209 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 22 predicate places. [2023-09-01 04:12:32,209 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 40 transitions, 233 flow [2023-09-01 04:12:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:32,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:32,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:12:32,220 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 [2023-09-01 04:12:32,419 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 [2023-09-01 04:12:32,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:32,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 747256409, now seen corresponding path program 1 times [2023-09-01 04:12:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492312474] [2023-09-01 04:12:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:32,421 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 [2023-09-01 04:12:32,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:32,422 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) [2023-09-01 04:12:32,423 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 [2023-09-01 04:12:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:32,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:12:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:32,519 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:12:32,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:12:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:32,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:32,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:32,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492312474] [2023-09-01 04:12:32,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492312474] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:32,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:32,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:12:32,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999220120] [2023-09-01 04:12:32,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:32,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:32,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:32,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:12:32,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 396 [2023-09-01 04:12:32,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 40 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:32,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:32,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 396 [2023-09-01 04:12:32,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:33,070 INFO L130 PetriNetUnfolder]: 1406/2318 cut-off events. [2023-09-01 04:12:33,070 INFO L131 PetriNetUnfolder]: For 659/659 co-relation queries the response was YES. [2023-09-01 04:12:33,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 2318 events. 1406/2318 cut-off events. For 659/659 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13811 event pairs, 801 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 5301. Up to 2260 conditions per place. [2023-09-01 04:12:33,082 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 30 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-09-01 04:12:33,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 301 flow [2023-09-01 04:12:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:12:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:12:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 650 transitions. [2023-09-01 04:12:33,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41035353535353536 [2023-09-01 04:12:33,086 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 650 transitions. [2023-09-01 04:12:33,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 650 transitions. [2023-09-01 04:12:33,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:33,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 650 transitions. [2023-09-01 04:12:33,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.5) internal successors, (650), 4 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:33,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:33,090 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:33,091 INFO L175 Difference]: Start difference. First operand has 62 places, 40 transitions, 233 flow. Second operand 4 states and 650 transitions. [2023-09-01 04:12:33,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 301 flow [2023-09-01 04:12:33,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 38 transitions, 287 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 04:12:33,093 INFO L231 Difference]: Finished difference. Result has 61 places, 38 transitions, 227 flow [2023-09-01 04:12:33,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=61, PETRI_TRANSITIONS=38} [2023-09-01 04:12:33,095 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-09-01 04:12:33,095 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 38 transitions, 227 flow [2023-09-01 04:12:33,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:33,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:33,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:33,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:33,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:12:33,305 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:33,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1690112978, now seen corresponding path program 1 times [2023-09-01 04:12:33,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:33,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115198790] [2023-09-01 04:12:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:33,306 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 [2023-09-01 04:12:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:33,307 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:12:33,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 04:12:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:12:33,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:33,432 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:33,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:33,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:34,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:34,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115198790] [2023-09-01 04:12:34,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115198790] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:34,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:34,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:12:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121728154] [2023-09-01 04:12:34,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:34,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:12:34,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:12:34,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:12:39,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 396 [2023-09-01 04:12:39,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 38 transitions, 227 flow. Second operand has 8 states, 8 states have (on average 159.5) internal successors, (1276), 8 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:39,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:39,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 396 [2023-09-01 04:12:39,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:42,194 INFO L130 PetriNetUnfolder]: 1109/1871 cut-off events. [2023-09-01 04:12:42,195 INFO L131 PetriNetUnfolder]: For 610/610 co-relation queries the response was YES. [2023-09-01 04:12:42,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 1871 events. 1109/1871 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10915 event pairs, 624 based on Foata normal form. 21/1252 useless extension candidates. Maximal degree in co-relation 4276. Up to 1507 conditions per place. [2023-09-01 04:12:42,207 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 50 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2023-09-01 04:12:42,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 414 flow [2023-09-01 04:12:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:12:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:12:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1481 transitions. [2023-09-01 04:12:42,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155443322109989 [2023-09-01 04:12:42,213 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1481 transitions. [2023-09-01 04:12:42,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1481 transitions. [2023-09-01 04:12:42,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:42,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1481 transitions. [2023-09-01 04:12:42,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.55555555555554) internal successors, (1481), 9 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:42,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:42,222 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:42,223 INFO L175 Difference]: Start difference. First operand has 61 places, 38 transitions, 227 flow. Second operand 9 states and 1481 transitions. [2023-09-01 04:12:42,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 414 flow [2023-09-01 04:12:42,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:12:42,226 INFO L231 Difference]: Finished difference. Result has 69 places, 38 transitions, 261 flow [2023-09-01 04:12:42,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=69, PETRI_TRANSITIONS=38} [2023-09-01 04:12:42,227 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2023-09-01 04:12:42,227 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 38 transitions, 261 flow [2023-09-01 04:12:42,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.5) internal successors, (1276), 8 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:42,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:42,228 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:42,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:42,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:12:42,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:42,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1346410616, now seen corresponding path program 2 times [2023-09-01 04:12:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:42,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267499663] [2023-09-01 04:12:42,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:12:42,449 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 [2023-09-01 04:12:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:42,450 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:12:42,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 04:12:42,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:12:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 04:12:42,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:42,574 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:42,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 04:12:42,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:42,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267499663] [2023-09-01 04:12:42,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267499663] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:42,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:42,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:12:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968143916] [2023-09-01 04:12:42,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:42,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:12:42,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-09-01 04:12:42,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 38 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:42,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:42,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-09-01 04:12:42,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:43,142 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-09-01 04:12:43,142 INFO L131 PetriNetUnfolder]: For 962/962 co-relation queries the response was YES. [2023-09-01 04:12:43,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2265 conditions, 977 events. 515/977 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5382 event pairs, 270 based on Foata normal form. 138/899 useless extension candidates. Maximal degree in co-relation 2233. Up to 919 conditions per place. [2023-09-01 04:12:43,147 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-09-01 04:12:43,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-09-01 04:12:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:12:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:12:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2023-09-01 04:12:43,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2023-09-01 04:12:43,150 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2023-09-01 04:12:43,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2023-09-01 04:12:43,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:43,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2023-09-01 04:12:43,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:43,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:43,155 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:43,155 INFO L175 Difference]: Start difference. First operand has 69 places, 38 transitions, 261 flow. Second operand 4 states and 676 transitions. [2023-09-01 04:12:43,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-09-01 04:12:43,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-09-01 04:12:43,158 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-09-01 04:12:43,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-09-01 04:12:43,159 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2023-09-01 04:12:43,159 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-09-01 04:12:43,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:43,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:43,160 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 04:12:43,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:12:43,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:12:43,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1167221794, now seen corresponding path program 3 times [2023-09-01 04:12:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:43,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564140732] [2023-09-01 04:12:43,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:12:43,373 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 [2023-09-01 04:12:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:43,374 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:12:43,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:12:43,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 04:12:43,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:12:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:43,599 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:43,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:43,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:45,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564140732] [2023-09-01 04:12:45,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564140732] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:45,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:45,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:12:45,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139197544] [2023-09-01 04:12:45,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:45,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:12:45,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:12:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:12:57,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2023-09-01 04:12:57,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:57,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:57,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2023-09-01 04:12:57,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:12,206 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-09-01 04:13:12,206 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-09-01 04:13:12,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5021 conditions, 2273 events. 1199/2273 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13351 event pairs, 630 based on Foata normal form. 12/1861 useless extension candidates. Maximal degree in co-relation 4998. Up to 504 conditions per place. [2023-09-01 04:13:12,213 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-09-01 04:13:12,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-09-01 04:13:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:13:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:13:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4223 transitions. [2023-09-01 04:13:12,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44433922558922556 [2023-09-01 04:13:12,224 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4223 transitions. [2023-09-01 04:13:12,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4223 transitions. [2023-09-01 04:13:12,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:12,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4223 transitions. [2023-09-01 04:13:12,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 175.95833333333334) internal successors, (4223), 24 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:12,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 396.0) internal successors, (9900), 25 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:12,250 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 396.0) internal successors, (9900), 25 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:12,250 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 4223 transitions. [2023-09-01 04:13:12,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-09-01 04:13:12,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:13:12,256 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-09-01 04:13:12,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-09-01 04:13:12,257 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2023-09-01 04:13:12,257 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-09-01 04:13:12,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:12,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:12,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:12,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:12,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:12,469 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:12,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1486666684, now seen corresponding path program 1 times [2023-09-01 04:13:12,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:12,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895844922] [2023-09-01 04:13:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:13:12,470 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 [2023-09-01 04:13:12,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:12,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 04:13:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:13:12,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:13:12,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:12,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:13:12,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895844922] [2023-09-01 04:13:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895844922] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:13:12,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:13:12,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:13:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475760432] [2023-09-01 04:13:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:13:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:13:12,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:13:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:13:12,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 396 [2023-09-01 04:13:12,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:12,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:12,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 396 [2023-09-01 04:13:12,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:12,992 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-09-01 04:13:12,992 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-09-01 04:13:12,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 16646 event pairs, 273 based on Foata normal form. 21/2231 useless extension candidates. Maximal degree in co-relation 6151. Up to 2101 conditions per place. [2023-09-01 04:13:13,004 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-09-01 04:13:13,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-09-01 04:13:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:13:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:13:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-09-01 04:13:13,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2023-09-01 04:13:13,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-09-01 04:13:13,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-09-01 04:13:13,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:13,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-09-01 04:13:13,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,011 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 534 transitions. [2023-09-01 04:13:13,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-09-01 04:13:13,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-09-01 04:13:13,016 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-09-01 04:13:13,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-09-01 04:13:13,017 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2023-09-01 04:13:13,017 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-09-01 04:13:13,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:13,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:13,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:13,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:13,227 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:13,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1394674302, now seen corresponding path program 1 times [2023-09-01 04:13:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:13,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836630192] [2023-09-01 04:13:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:13:13,228 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 [2023-09-01 04:13:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:13,229 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:13,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 04:13:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:13:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:13:13,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:13,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:13:13,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:13,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836630192] [2023-09-01 04:13:13,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836630192] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:13:13,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:13:13,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 04:13:13,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107099996] [2023-09-01 04:13:13,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:13:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:13:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:13:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:13:13,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2023-09-01 04:13:13,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:13,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2023-09-01 04:13:13,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:13,848 INFO L130 PetriNetUnfolder]: 1463/2827 cut-off events. [2023-09-01 04:13:13,848 INFO L131 PetriNetUnfolder]: For 1193/1193 co-relation queries the response was YES. [2023-09-01 04:13:13,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7128 conditions, 2827 events. 1463/2827 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 17918 event pairs, 300 based on Foata normal form. 160/2867 useless extension candidates. Maximal degree in co-relation 7090. Up to 1582 conditions per place. [2023-09-01 04:13:13,860 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 50 selfloop transitions, 12 changer transitions 2/65 dead transitions. [2023-09-01 04:13:13,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 65 transitions, 521 flow [2023-09-01 04:13:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:13:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:13:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 863 transitions. [2023-09-01 04:13:13,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43585858585858583 [2023-09-01 04:13:13,864 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 863 transitions. [2023-09-01 04:13:13,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 863 transitions. [2023-09-01 04:13:13,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:13,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 863 transitions. [2023-09-01 04:13:13,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,869 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,869 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 5 states and 863 transitions. [2023-09-01 04:13:13,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 65 transitions, 521 flow [2023-09-01 04:13:13,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 65 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:13:13,874 INFO L231 Difference]: Finished difference. Result has 86 places, 51 transitions, 387 flow [2023-09-01 04:13:13,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=86, PETRI_TRANSITIONS=51} [2023-09-01 04:13:13,875 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2023-09-01 04:13:13,875 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 51 transitions, 387 flow [2023-09-01 04:13:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:13,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:13,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:13,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:14,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:14,085 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:14,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:14,086 INFO L85 PathProgramCache]: Analyzing trace with hash 121831332, now seen corresponding path program 2 times [2023-09-01 04:13:14,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:14,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513278017] [2023-09-01 04:13:14,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:13:14,086 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 [2023-09-01 04:13:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:14,087 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:14,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 04:13:14,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:13:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:14,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:13:14,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:14,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:13:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:14,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513278017] [2023-09-01 04:13:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513278017] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:13:14,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:13:14,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-09-01 04:13:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793026916] [2023-09-01 04:13:14,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:13:14,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 04:13:14,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 04:13:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-09-01 04:13:14,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 396 [2023-09-01 04:13:14,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 51 transitions, 387 flow. Second operand has 11 states, 11 states have (on average 163.36363636363637) internal successors, (1797), 11 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:14,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:14,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 396 [2023-09-01 04:13:14,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:15,477 INFO L130 PetriNetUnfolder]: 2383/4627 cut-off events. [2023-09-01 04:13:15,478 INFO L131 PetriNetUnfolder]: For 4717/4717 co-relation queries the response was YES. [2023-09-01 04:13:15,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13952 conditions, 4627 events. 2383/4627 cut-off events. For 4717/4717 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 29831 event pairs, 520 based on Foata normal form. 320/4947 useless extension candidates. Maximal degree in co-relation 13912. Up to 1382 conditions per place. [2023-09-01 04:13:15,503 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 66 selfloop transitions, 29 changer transitions 4/99 dead transitions. [2023-09-01 04:13:15,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 786 flow [2023-09-01 04:13:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:13:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:13:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1677 transitions. [2023-09-01 04:13:15,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42348484848484846 [2023-09-01 04:13:15,542 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1677 transitions. [2023-09-01 04:13:15,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1677 transitions. [2023-09-01 04:13:15,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:15,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1677 transitions. [2023-09-01 04:13:15,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 167.7) internal successors, (1677), 10 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:15,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:15,552 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:15,552 INFO L175 Difference]: Start difference. First operand has 86 places, 51 transitions, 387 flow. Second operand 10 states and 1677 transitions. [2023-09-01 04:13:15,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 786 flow [2023-09-01 04:13:15,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 736 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-09-01 04:13:15,577 INFO L231 Difference]: Finished difference. Result has 99 places, 69 transitions, 577 flow [2023-09-01 04:13:15,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=577, PETRI_PLACES=99, PETRI_TRANSITIONS=69} [2023-09-01 04:13:15,577 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2023-09-01 04:13:15,577 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 69 transitions, 577 flow [2023-09-01 04:13:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 163.36363636363637) internal successors, (1797), 11 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:15,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:15,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:15,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:15,779 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:15,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -768683172, now seen corresponding path program 3 times [2023-09-01 04:13:15,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:15,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44511746] [2023-09-01 04:13:15,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:13:15,780 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 [2023-09-01 04:13:15,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:15,782 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:15,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 04:13:15,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:13:15,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:13:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:15,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:13:15,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:15,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44511746] [2023-09-01 04:13:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44511746] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:13:15,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:13:15,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 04:13:15,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918897691] [2023-09-01 04:13:15,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:13:15,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:13:15,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:13:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:13:16,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-09-01 04:13:16,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 69 transitions, 577 flow. Second operand has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:16,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:16,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-09-01 04:13:16,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:17,037 INFO L130 PetriNetUnfolder]: 3703/7227 cut-off events. [2023-09-01 04:13:17,037 INFO L131 PetriNetUnfolder]: For 14700/14700 co-relation queries the response was YES. [2023-09-01 04:13:17,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28758 conditions, 7227 events. 3703/7227 cut-off events. For 14700/14700 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 50604 event pairs, 900 based on Foata normal form. 80/7307 useless extension candidates. Maximal degree in co-relation 28712. Up to 3202 conditions per place. [2023-09-01 04:13:17,088 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 87 selfloop transitions, 19 changer transitions 1/107 dead transitions. [2023-09-01 04:13:17,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 1035 flow [2023-09-01 04:13:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:13:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:13:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1027 transitions. [2023-09-01 04:13:17,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43223905723905726 [2023-09-01 04:13:17,091 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1027 transitions. [2023-09-01 04:13:17,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1027 transitions. [2023-09-01 04:13:17,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:17,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1027 transitions. [2023-09-01 04:13:17,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:17,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:17,096 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:17,096 INFO L175 Difference]: Start difference. First operand has 99 places, 69 transitions, 577 flow. Second operand 6 states and 1027 transitions. [2023-09-01 04:13:17,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 1035 flow [2023-09-01 04:13:17,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 107 transitions, 1003 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-09-01 04:13:17,210 INFO L231 Difference]: Finished difference. Result has 105 places, 76 transitions, 685 flow [2023-09-01 04:13:17,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=685, PETRI_PLACES=105, PETRI_TRANSITIONS=76} [2023-09-01 04:13:17,210 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2023-09-01 04:13:17,211 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 76 transitions, 685 flow [2023-09-01 04:13:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:17,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:17,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:17,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:17,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:17,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:17,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash -311231742, now seen corresponding path program 4 times [2023-09-01 04:13:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:17,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832315717] [2023-09-01 04:13:17,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:13:17,423 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 [2023-09-01 04:13:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:17,424 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:17,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 04:13:17,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:13:17,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:17,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:13:17,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:17,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:13:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:13:17,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:17,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832315717] [2023-09-01 04:13:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832315717] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:13:17,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:13:17,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-09-01 04:13:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932885990] [2023-09-01 04:13:17,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:13:17,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:13:17,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:13:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:13:17,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2023-09-01 04:13:17,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 76 transitions, 685 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:17,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:17,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2023-09-01 04:13:17,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:18,638 INFO L130 PetriNetUnfolder]: 3343/6527 cut-off events. [2023-09-01 04:13:18,638 INFO L131 PetriNetUnfolder]: For 22863/23183 co-relation queries the response was YES. [2023-09-01 04:13:18,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27902 conditions, 6527 events. 3343/6527 cut-off events. For 22863/23183 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 46093 event pairs, 940 based on Foata normal form. 160/6507 useless extension candidates. Maximal degree in co-relation 27854. Up to 4680 conditions per place. [2023-09-01 04:13:18,690 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 68 selfloop transitions, 17 changer transitions 4/91 dead transitions. [2023-09-01 04:13:18,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 91 transitions, 948 flow [2023-09-01 04:13:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:13:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:13:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 697 transitions. [2023-09-01 04:13:18,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44002525252525254 [2023-09-01 04:13:18,693 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 697 transitions. [2023-09-01 04:13:18,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 697 transitions. [2023-09-01 04:13:18,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:18,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 697 transitions. [2023-09-01 04:13:18,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:18,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:18,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:18,697 INFO L175 Difference]: Start difference. First operand has 105 places, 76 transitions, 685 flow. Second operand 4 states and 697 transitions. [2023-09-01 04:13:18,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 91 transitions, 948 flow [2023-09-01 04:13:18,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 91 transitions, 922 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-09-01 04:13:18,864 INFO L231 Difference]: Finished difference. Result has 109 places, 79 transitions, 755 flow [2023-09-01 04:13:18,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=755, PETRI_PLACES=109, PETRI_TRANSITIONS=79} [2023-09-01 04:13:18,865 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2023-09-01 04:13:18,865 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 79 transitions, 755 flow [2023-09-01 04:13:18,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:18,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:18,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:18,875 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 (20)] Ended with exit code 0 [2023-09-01 04:13:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:19,075 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:19,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 836745722, now seen corresponding path program 1 times [2023-09-01 04:13:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903304413] [2023-09-01 04:13:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:13:19,076 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 [2023-09-01 04:13:19,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:19,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:19,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 04:13:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:13:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:13:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:13:19,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:13:19,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:19,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903304413] [2023-09-01 04:13:19,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903304413] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:13:19,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:13:19,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 04:13:19,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178178374] [2023-09-01 04:13:19,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:13:19,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:13:19,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:13:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:13:19,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-09-01 04:13:19,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 79 transitions, 755 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:19,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:19,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-09-01 04:13:19,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:20,214 INFO L130 PetriNetUnfolder]: 2963/5667 cut-off events. [2023-09-01 04:13:20,214 INFO L131 PetriNetUnfolder]: For 19774/19894 co-relation queries the response was YES. [2023-09-01 04:13:20,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24344 conditions, 5667 events. 2963/5667 cut-off events. For 19774/19894 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 36879 event pairs, 1140 based on Foata normal form. 220/5887 useless extension candidates. Maximal degree in co-relation 24294. Up to 4282 conditions per place. [2023-09-01 04:13:20,250 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 75 selfloop transitions, 13 changer transitions 2/95 dead transitions. [2023-09-01 04:13:20,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 95 transitions, 1013 flow [2023-09-01 04:13:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:13:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:13:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 851 transitions. [2023-09-01 04:13:20,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297979797979798 [2023-09-01 04:13:20,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 851 transitions. [2023-09-01 04:13:20,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 851 transitions. [2023-09-01 04:13:20,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:20,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 851 transitions. [2023-09-01 04:13:20,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:20,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:20,255 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:20,255 INFO L175 Difference]: Start difference. First operand has 109 places, 79 transitions, 755 flow. Second operand 5 states and 851 transitions. [2023-09-01 04:13:20,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 95 transitions, 1013 flow [2023-09-01 04:13:20,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 95 transitions, 955 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-09-01 04:13:20,394 INFO L231 Difference]: Finished difference. Result has 109 places, 79 transitions, 750 flow [2023-09-01 04:13:20,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=750, PETRI_PLACES=109, PETRI_TRANSITIONS=79} [2023-09-01 04:13:20,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2023-09-01 04:13:20,395 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 79 transitions, 750 flow [2023-09-01 04:13:20,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:20,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:20,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:20,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:20,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:20,606 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:20,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:20,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1034117090, now seen corresponding path program 2 times [2023-09-01 04:13:20,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:20,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229620213] [2023-09-01 04:13:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:13:20,607 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 [2023-09-01 04:13:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:20,608 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:20,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 04:13:20,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:13:20,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:20,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:13:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:20,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:13:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:20,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229620213] [2023-09-01 04:13:20,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229620213] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:13:20,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:13:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-09-01 04:13:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934739021] [2023-09-01 04:13:20,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:13:20,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:13:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:13:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:13:21,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2023-09-01 04:13:21,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 79 transitions, 750 flow. Second operand has 10 states, 10 states have (on average 168.5) internal successors, (1685), 10 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:21,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:21,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2023-09-01 04:13:21,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:22,696 INFO L130 PetriNetUnfolder]: 4723/8687 cut-off events. [2023-09-01 04:13:22,696 INFO L131 PetriNetUnfolder]: For 29123/30043 co-relation queries the response was YES. [2023-09-01 04:13:22,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38725 conditions, 8687 events. 4723/8687 cut-off events. For 29123/30043 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 61150 event pairs, 580 based on Foata normal form. 1520/10107 useless extension candidates. Maximal degree in co-relation 38676. Up to 2680 conditions per place. [2023-09-01 04:13:22,752 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 88 selfloop transitions, 41 changer transitions 3/134 dead transitions. [2023-09-01 04:13:22,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 134 transitions, 1388 flow [2023-09-01 04:13:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:13:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:13:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1721 transitions. [2023-09-01 04:13:22,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345959595959596 [2023-09-01 04:13:22,755 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1721 transitions. [2023-09-01 04:13:22,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1721 transitions. [2023-09-01 04:13:22,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:22,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1721 transitions. [2023-09-01 04:13:22,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 172.1) internal successors, (1721), 10 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:22,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:22,761 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:22,761 INFO L175 Difference]: Start difference. First operand has 109 places, 79 transitions, 750 flow. Second operand 10 states and 1721 transitions. [2023-09-01 04:13:22,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 134 transitions, 1388 flow [2023-09-01 04:13:23,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 134 transitions, 1314 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-09-01 04:13:23,011 INFO L231 Difference]: Finished difference. Result has 119 places, 88 transitions, 891 flow [2023-09-01 04:13:23,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=891, PETRI_PLACES=119, PETRI_TRANSITIONS=88} [2023-09-01 04:13:23,012 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 79 predicate places. [2023-09-01 04:13:23,012 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 88 transitions, 891 flow [2023-09-01 04:13:23,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 168.5) internal successors, (1685), 10 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:23,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:23,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:23,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:23,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:23,226 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:23,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1708162462, now seen corresponding path program 3 times [2023-09-01 04:13:23,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:23,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990633342] [2023-09-01 04:13:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:13:23,227 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 [2023-09-01 04:13:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:23,228 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:23,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 04:13:23,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:13:23,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:13:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 04:13:23,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:13:23,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990633342] [2023-09-01 04:13:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990633342] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:13:23,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:13:23,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 04:13:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411830314] [2023-09-01 04:13:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:13:23,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:13:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:13:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:13:23,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-09-01 04:13:23,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 88 transitions, 891 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:23,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:23,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-09-01 04:13:23,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:24,965 INFO L130 PetriNetUnfolder]: 5623/10127 cut-off events. [2023-09-01 04:13:24,966 INFO L131 PetriNetUnfolder]: For 39448/39628 co-relation queries the response was YES. [2023-09-01 04:13:25,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49709 conditions, 10127 events. 5623/10127 cut-off events. For 39448/39628 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 68898 event pairs, 860 based on Foata normal form. 400/10527 useless extension candidates. Maximal degree in co-relation 49656. Up to 8780 conditions per place. [2023-09-01 04:13:25,076 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 84 selfloop transitions, 15 changer transitions 1/105 dead transitions. [2023-09-01 04:13:25,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 105 transitions, 1205 flow [2023-09-01 04:13:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:13:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:13:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 851 transitions. [2023-09-01 04:13:25,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297979797979798 [2023-09-01 04:13:25,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 851 transitions. [2023-09-01 04:13:25,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 851 transitions. [2023-09-01 04:13:25,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:25,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 851 transitions. [2023-09-01 04:13:25,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:25,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:25,083 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:25,083 INFO L175 Difference]: Start difference. First operand has 119 places, 88 transitions, 891 flow. Second operand 5 states and 851 transitions. [2023-09-01 04:13:25,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 105 transitions, 1205 flow [2023-09-01 04:13:25,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 105 transitions, 1102 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-09-01 04:13:25,537 INFO L231 Difference]: Finished difference. Result has 121 places, 90 transitions, 869 flow [2023-09-01 04:13:25,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=869, PETRI_PLACES=121, PETRI_TRANSITIONS=90} [2023-09-01 04:13:25,539 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2023-09-01 04:13:25,540 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 90 transitions, 869 flow [2023-09-01 04:13:25,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:25,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:25,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:25,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 04:13:25,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:25,753 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:25,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash 569297098, now seen corresponding path program 4 times [2023-09-01 04:13:25,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:25,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836517060] [2023-09-01 04:13:25,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:13:25,754 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 [2023-09-01 04:13:25,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:25,755 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:25,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 04:13:25,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:13:25,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:25,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:13:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:26,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:13:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:26,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:26,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836517060] [2023-09-01 04:13:26,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836517060] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:13:26,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:13:26,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-09-01 04:13:26,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708464596] [2023-09-01 04:13:26,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:13:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 04:13:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 04:13:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-09-01 04:13:26,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 396 [2023-09-01 04:13:26,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 90 transitions, 869 flow. Second operand has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:26,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:26,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 396 [2023-09-01 04:13:26,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:30,034 INFO L130 PetriNetUnfolder]: 7923/14527 cut-off events. [2023-09-01 04:13:30,035 INFO L131 PetriNetUnfolder]: For 57495/57495 co-relation queries the response was YES. [2023-09-01 04:13:30,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65513 conditions, 14527 events. 7923/14527 cut-off events. For 57495/57495 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 106404 event pairs, 1900 based on Foata normal form. 520/15047 useless extension candidates. Maximal degree in co-relation 65458. Up to 8042 conditions per place. [2023-09-01 04:13:30,172 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 129 selfloop transitions, 64 changer transitions 1/194 dead transitions. [2023-09-01 04:13:30,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 194 transitions, 1902 flow [2023-09-01 04:13:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 04:13:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 04:13:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3329 transitions. [2023-09-01 04:13:30,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42032828282828283 [2023-09-01 04:13:30,176 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3329 transitions. [2023-09-01 04:13:30,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3329 transitions. [2023-09-01 04:13:30,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:30,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3329 transitions. [2023-09-01 04:13:30,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 166.45) internal successors, (3329), 20 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:30,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 396.0) internal successors, (8316), 21 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:30,187 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 396.0) internal successors, (8316), 21 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:30,188 INFO L175 Difference]: Start difference. First operand has 121 places, 90 transitions, 869 flow. Second operand 20 states and 3329 transitions. [2023-09-01 04:13:30,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 194 transitions, 1902 flow [2023-09-01 04:13:30,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 1862 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-09-01 04:13:30,805 INFO L231 Difference]: Finished difference. Result has 149 places, 141 transitions, 1529 flow [2023-09-01 04:13:30,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1529, PETRI_PLACES=149, PETRI_TRANSITIONS=141} [2023-09-01 04:13:30,806 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2023-09-01 04:13:30,806 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 141 transitions, 1529 flow [2023-09-01 04:13:30,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:30,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:30,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:30,814 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 (24)] Ended with exit code 0 [2023-09-01 04:13:31,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:31,009 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-09-01 04:13:31,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash -854847242, now seen corresponding path program 1 times [2023-09-01 04:13:31,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:31,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217836839] [2023-09-01 04:13:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:13:31,010 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 [2023-09-01 04:13:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:31,011 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:31,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 04:13:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:13:31,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 04:13:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:32,405 INFO L321 Elim1Store]: treesize reduction 420, result has 20.6 percent of original size [2023-09-01 04:13:32,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 1313 treesize of output 237 [2023-09-01 04:14:28,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2023-09-01 04:14:28,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217836839] [2023-09-01 04:14:28,814 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-09-01 04:14:28,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:29,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:29,016 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:86) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:900) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:774) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:362) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:311) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 45 more [2023-09-01 04:14:29,018 INFO L158 Benchmark]: Toolchain (without parser) took 152466.06ms. Allocated memory was 90.2MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 70.5MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2023-09-01 04:14:29,019 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory was 41.0MB in the beginning and 40.9MB in the end (delta: 53.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:14:29,019 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.23ms. Allocated memory is still 90.2MB. Free memory was 70.3MB in the beginning and 56.8MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-09-01 04:14:29,019 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.40ms. Allocated memory is still 90.2MB. Free memory was 56.8MB in the beginning and 54.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:14:29,019 INFO L158 Benchmark]: Boogie Preprocessor took 56.45ms. Allocated memory is still 90.2MB. Free memory was 54.8MB in the beginning and 52.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:14:29,020 INFO L158 Benchmark]: RCFGBuilder took 640.01ms. Allocated memory is still 90.2MB. Free memory was 52.9MB in the beginning and 53.0MB in the end (delta: -104.5kB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2023-09-01 04:14:29,020 INFO L158 Benchmark]: TraceAbstraction took 151362.91ms. Allocated memory was 90.2MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 52.2MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2023-09-01 04:14:29,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory was 41.0MB in the beginning and 40.9MB in the end (delta: 53.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.23ms. Allocated memory is still 90.2MB. Free memory was 70.3MB in the beginning and 56.8MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.40ms. Allocated memory is still 90.2MB. Free memory was 56.8MB in the beginning and 54.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.45ms. Allocated memory is still 90.2MB. Free memory was 54.8MB in the beginning and 52.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 640.01ms. Allocated memory is still 90.2MB. Free memory was 52.9MB in the beginning and 53.0MB in the end (delta: -104.5kB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * TraceAbstraction took 151362.91ms. Allocated memory was 90.2MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 52.2MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 16.8s, 176 PlacesBefore, 40 PlacesAfterwards, 184 TransitionsBefore, 36 TransitionsAfterwards, 3708 CoEnabledTransitionPairs, 7 FixpointIterations, 86 TrivialSequentialCompositions, 80 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 9 ConcurrentYvCompositions, 12 ChoiceCompositions, 206 TotalNumberOfCompositions, 3611 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3524, independent: 3514, independent conditional: 0, independent unconditional: 3514, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1931, independent: 1927, independent conditional: 0, independent unconditional: 1927, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3524, independent: 1587, independent conditional: 0, independent unconditional: 1587, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 1931, unknown conditional: 0, unknown unconditional: 1931] , Statistics on independence cache: Total cache size (in pairs): 55, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.