./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-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/popl20-queue-add-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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --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 03:47:18,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:47:18,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:47:18,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:47:18,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:47:18,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:47:18,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:47:18,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:47:18,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:47:18,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:47:18,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:47:18,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:47:18,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:47:18,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:47:18,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:47:18,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:47:18,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:47:18,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:47:18,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:47:18,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:47:18,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:47:18,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:47:18,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:47:18,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:47:18,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:47:18,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:47:18,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:47:18,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:47:18,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:47:18,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:47:18,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:47:18,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:47:18,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:47:18,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:47:18,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:47:18,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:47:18,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:47:18,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:47:18,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:47:18,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:47:18,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:47:18,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:47:18,512 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:47:18,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:47:18,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:47:18,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:47:18,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:47:18,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:47:18,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:47:18,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:47:18,517 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:47:18,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:47:18,518 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:47:18,518 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:47:18,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:47:18,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:47:18,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:47:18,519 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:47:18,519 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:47:18,519 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:47:18,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:47:18,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:47:18,520 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:47:18,520 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:47:18,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:47:18,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:47:18,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:47:18,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:47:18,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:47:18,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:47:18,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:47:18,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:47:18,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:47:18,522 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:47:18,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:47:18,523 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:47:18,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:47:18,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:47:18,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:47:18,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:47:18,848 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:47:18,848 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:47:18,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-09-01 03:47:20,152 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:47:20,420 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:47:20,420 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-09-01 03:47:20,426 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c660f0658/91d358868ccc45af81636da8f8835d09/FLAG3e8d02b39 [2023-09-01 03:47:20,436 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c660f0658/91d358868ccc45af81636da8f8835d09 [2023-09-01 03:47:20,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:47:20,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:47:20,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:20,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:47:20,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:47:20,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:20" (1/1) ... [2023-09-01 03:47:20,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f0dab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:20, skipping insertion in model container [2023-09-01 03:47:20,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:20" (1/1) ... [2023-09-01 03:47:20,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:47:20,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:47:20,629 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-09-01 03:47:20,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:20,651 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 03:47:20,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@cf67517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:20, skipping insertion in model container [2023-09-01 03:47:20,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:20,652 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:47:20,654 INFO L158 Benchmark]: Toolchain (without parser) took 212.71ms. Allocated memory is still 71.3MB. Free memory was 49.7MB in the beginning and 39.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:47:20,654 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:47:20,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.77ms. Allocated memory is still 71.3MB. Free memory was 49.5MB in the beginning and 39.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:47:20,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.77ms. Allocated memory is still 71.3MB. Free memory was 49.5MB in the beginning and 39.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 135]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --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 03:47:22,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:47:22,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:47:22,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:47:22,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:47:22,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:47:22,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:47:22,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:47:22,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:47:22,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:47:22,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:47:22,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:47:22,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:47:22,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:47:22,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:47:22,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:47:22,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:47:22,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:47:22,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:47:22,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:47:22,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:47:22,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:47:22,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:47:22,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:47:22,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:47:22,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:47:22,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:47:22,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:47:22,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:47:22,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:47:22,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:47:22,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:47:22,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:47:22,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:47:22,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:47:22,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:47:22,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:47:22,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:47:22,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:47:22,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:47:22,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:47:22,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:47:22,553 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:47:22,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:47:22,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:47:22,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:47:22,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:47:22,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:47:22,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:47:22,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:47:22,557 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:47:22,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:47:22,558 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:47:22,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:47:22,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:47:22,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:47:22,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:47:22,559 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:47:22,560 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:47:22,560 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:47:22,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:47:22,560 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:47:22,560 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:47:22,561 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:47:22,561 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:47:22,561 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:47:22,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:47:22,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:47:22,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:47:22,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:47:22,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:47:22,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:47:22,563 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:47:22,563 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:47:22,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:47:22,564 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:47:22,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:47:22,564 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:47:22,564 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:47:22,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:47:22,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:47:22,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:47:22,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:47:22,916 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:47:22,916 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:47:22,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-09-01 03:47:24,125 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:47:24,365 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:47:24,367 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-09-01 03:47:24,373 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4e58e1e/7523fff6077449c98fdc206249cb4bb7/FLAGe3b692341 [2023-09-01 03:47:24,384 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4e58e1e/7523fff6077449c98fdc206249cb4bb7 [2023-09-01 03:47:24,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:47:24,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:47:24,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:24,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:47:24,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:47:24,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f932d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24, skipping insertion in model container [2023-09-01 03:47:24,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:47:24,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:47:24,587 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-09-01 03:47:24,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:24,607 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:47:24,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:47:24,628 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-09-01 03:47:24,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:24,637 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:47:24,667 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-09-01 03:47:24,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:24,696 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:47:24,700 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:47:24,707 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:47:24,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24 WrapperNode [2023-09-01 03:47:24,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:24,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:47:24,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:47:24,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:47:24,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,776 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2023-09-01 03:47:24,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:47:24,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:47:24,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:47:24,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:47:24,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:47:24,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:47:24,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:47:24,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:47:24,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (1/1) ... [2023-09-01 03:47:24,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:47:24,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:47:24,874 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 03:47:24,898 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 03:47:24,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:47:24,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:47:24,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:47:24,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:47:24,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:47:24,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:47:24,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:47:24,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:47:24,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:47:24,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:47:24,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:47:24,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:47:24,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:47:24,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:47:24,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:47:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:47:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:47:24,923 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 03:47:25,110 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:47:25,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:47:25,581 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:47:25,726 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:47:25,727 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 03:47:25,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:47:25 BoogieIcfgContainer [2023-09-01 03:47:25,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:47:25,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:47:25,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:47:25,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:47:25,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:47:24" (1/3) ... [2023-09-01 03:47:25,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727b839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:47:25, skipping insertion in model container [2023-09-01 03:47:25,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:24" (2/3) ... [2023-09-01 03:47:25,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727b839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:47:25, skipping insertion in model container [2023-09-01 03:47:25,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:47:25" (3/3) ... [2023-09-01 03:47:25,738 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-09-01 03:47:25,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:47:25,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-09-01 03:47:25,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:47:25,841 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:47:25,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 224 transitions, 472 flow [2023-09-01 03:47:25,989 INFO L130 PetriNetUnfolder]: 18/221 cut-off events. [2023-09-01 03:47:25,989 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:47:25,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 221 events. 18/221 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-09-01 03:47:25,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 224 transitions, 472 flow [2023-09-01 03:47:26,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 217 transitions, 452 flow [2023-09-01 03:47:26,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:47:26,019 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 217 transitions, 452 flow [2023-09-01 03:47:26,021 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 217 transitions, 452 flow [2023-09-01 03:47:26,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 452 flow [2023-09-01 03:47:26,071 INFO L130 PetriNetUnfolder]: 18/217 cut-off events. [2023-09-01 03:47:26,071 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:47:26,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 217 events. 18/217 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-09-01 03:47:26,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-09-01 03:47:48,359 INFO L134 LiptonReduction]: Checked pairs total: 4207 [2023-09-01 03:47:48,360 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-09-01 03:47:48,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:47:48,379 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;@26e1c163, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:47:48,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-09-01 03:47:48,383 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:47:48,383 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:47:48,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:48,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:47:48,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:47:48,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash 32725, now seen corresponding path program 1 times [2023-09-01 03:47:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:48,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038928500] [2023-09-01 03:47:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:47:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:48,409 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 03:47:48,422 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 03:47:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:48,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:47:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:48,666 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:47:48,667 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:47:48,711 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 03:47:48,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:48,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038928500] [2023-09-01 03:47:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038928500] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:48,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:48,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207415174] [2023-09-01 03:47:48,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:48,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:48,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-09-01 03:47:48,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 03:47:48,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:48,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-09-01 03:47:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:50,191 INFO L130 PetriNetUnfolder]: 5982/7543 cut-off events. [2023-09-01 03:47:50,191 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 03:47:50,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 7543 events. 5982/7543 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 33477 event pairs, 3015 based on Foata normal form. 0/1885 useless extension candidates. Maximal degree in co-relation 13723. Up to 7494 conditions per place. [2023-09-01 03:47:50,238 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 03:47:50,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 216 flow [2023-09-01 03:47:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-09-01 03:47:50,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274252370532458 [2023-09-01 03:47:50,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-09-01 03:47:50,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-09-01 03:47:50,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:50,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-09-01 03:47:50,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 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 03:47:50,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:47:50,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:47:50,277 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 586 transitions. [2023-09-01 03:47:50,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 216 flow [2023-09-01 03:47:50,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:47:50,286 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-09-01 03:47:50,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-09-01 03:47:50,295 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-09-01 03:47:50,296 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-09-01 03:47:50,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 03:47:50,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:50,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:47:50,308 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 03:47:50,505 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 03:47:50,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:47:50,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash 32726, now seen corresponding path program 1 times [2023-09-01 03:47:50,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:50,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029816942] [2023-09-01 03:47:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:50,515 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 03:47:50,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:50,517 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 03:47:50,520 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 03:47:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:50,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:47:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:50,704 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:47:50,704 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:47:50,744 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 03:47:50,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:50,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029816942] [2023-09-01 03:47:50,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029816942] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:50,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:50,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:50,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480164830] [2023-09-01 03:47:50,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:50,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:50,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:50,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:50,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-09-01 03:47:50,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 03:47:50,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:50,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-09-01 03:47:50,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:53,055 INFO L130 PetriNetUnfolder]: 11950/15070 cut-off events. [2023-09-01 03:47:53,055 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 03:47:53,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30173 conditions, 15070 events. 11950/15070 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 72986 event pairs, 6027 based on Foata normal form. 0/3784 useless extension candidates. Maximal degree in co-relation 30167. Up to 7491 conditions per place. [2023-09-01 03:47:53,153 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-09-01 03:47:53,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 392 flow [2023-09-01 03:47:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-09-01 03:47:53,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587892049598833 [2023-09-01 03:47:53,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-09-01 03:47:53,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-09-01 03:47:53,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:53,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-09-01 03:47:53,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 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 03:47:53,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:47:53,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:47:53,162 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 629 transitions. [2023-09-01 03:47:53,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 392 flow [2023-09-01 03:47:53,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:53,166 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2023-09-01 03:47:53,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-09-01 03:47:53,167 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-09-01 03:47:53,167 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2023-09-01 03:47:53,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 03:47:53,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:53,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:47:53,178 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 (3)] Ended with exit code 0 [2023-09-01 03:47:53,378 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 03:47:53,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:47:53,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1018781, now seen corresponding path program 1 times [2023-09-01 03:47:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:53,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039939281] [2023-09-01 03:47:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:53,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:47:53,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:53,382 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 03:47:53,385 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 03:47:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:47:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:53,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:53,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:53,556 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 03:47:53,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:47:53,582 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:47:53,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:47:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:53,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:47:53,687 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 03:47:53,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:53,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039939281] [2023-09-01 03:47:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039939281] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:53,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:53,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:47:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431278335] [2023-09-01 03:47:53,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:53,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:47:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:47:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:47:53,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-09-01 03:47:53,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 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 03:47:53,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:53,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-09-01 03:47:53,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:55,391 INFO L130 PetriNetUnfolder]: 9351/11909 cut-off events. [2023-09-01 03:47:55,391 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 03:47:55,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23866 conditions, 11909 events. 9351/11909 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 57655 event pairs, 4696 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 23857. Up to 11811 conditions per place. [2023-09-01 03:47:55,470 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 48 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-09-01 03:47:55,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 235 flow [2023-09-01 03:47:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-09-01 03:47:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43326039387308535 [2023-09-01 03:47:55,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-09-01 03:47:55,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-09-01 03:47:55,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:55,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-09-01 03:47:55,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 03:47:55,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:47:55,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:47:55,484 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 594 transitions. [2023-09-01 03:47:55,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 235 flow [2023-09-01 03:47:55,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:47:55,488 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2023-09-01 03:47:55,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-09-01 03:47:55,489 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-09-01 03:47:55,489 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2023-09-01 03:47:55,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 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 03:47:55,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:55,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:47:55,500 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 03:47:55,700 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 03:47:55,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:47:55,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:55,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1017782, now seen corresponding path program 1 times [2023-09-01 03:47:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:55,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720322965] [2023-09-01 03:47:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:55,702 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 03:47:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:55,703 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 03:47:55,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:47:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:47:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:55,891 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:47:55,891 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:47:55,957 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 03:47:55,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:47:56,142 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 03:47:56,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:56,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720322965] [2023-09-01 03:47:56,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720322965] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:47:56,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:47:56,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:47:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770538810] [2023-09-01 03:47:56,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:47:56,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:47:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:47:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:47:56,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 457 [2023-09-01 03:47:56,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:56,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:56,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 457 [2023-09-01 03:47:56,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:59,595 INFO L130 PetriNetUnfolder]: 14006/17846 cut-off events. [2023-09-01 03:47:59,595 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 03:47:59,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35759 conditions, 17846 events. 14006/17846 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 1413. Compared 90803 event pairs, 7038 based on Foata normal form. 0/4801 useless extension candidates. Maximal degree in co-relation 35750. Up to 5907 conditions per place. [2023-09-01 03:47:59,679 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 125 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2023-09-01 03:47:59,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 145 transitions, 631 flow [2023-09-01 03:47:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:47:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:47:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-09-01 03:47:59,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-09-01 03:47:59,684 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-09-01 03:47:59,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-09-01 03:47:59,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:59,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-09-01 03:47:59,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 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 03:47:59,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 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 03:47:59,693 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 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 03:47:59,693 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 6 states and 1156 transitions. [2023-09-01 03:47:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 145 transitions, 631 flow [2023-09-01 03:47:59,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 145 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:59,696 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 259 flow [2023-09-01 03:47:59,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2023-09-01 03:47:59,697 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-09-01 03:47:59,697 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 259 flow [2023-09-01 03:47:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:59,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:59,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:47:59,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:47:59,906 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 03:47:59,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:47:59,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1018782, now seen corresponding path program 1 times [2023-09-01 03:47:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:59,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657015502] [2023-09-01 03:47:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:59,908 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 03:47:59,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:59,909 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 03:47:59,910 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 03:47:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:47:59,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:00,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:00,085 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 03:48:00,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 03:48:00,432 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-09-01 03:48:00,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 03:48:00,483 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 03:48:00,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:00,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657015502] [2023-09-01 03:48:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657015502] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:00,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:48:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140315110] [2023-09-01 03:48:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:00,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:48:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:48:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:48:00,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 457 [2023-09-01 03:48:00,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 03:48:00,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:00,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 457 [2023-09-01 03:48:00,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:01,962 INFO L130 PetriNetUnfolder]: 10112/13109 cut-off events. [2023-09-01 03:48:01,962 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 03:48:01,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26332 conditions, 13109 events. 10112/13109 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 67461 event pairs, 5043 based on Foata normal form. 0/3886 useless extension candidates. Maximal degree in co-relation 26318. Up to 12962 conditions per place. [2023-09-01 03:48:02,018 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-09-01 03:48:02,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 355 flow [2023-09-01 03:48:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:48:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:48:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-09-01 03:48:02,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961342086068566 [2023-09-01 03:48:02,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-09-01 03:48:02,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-09-01 03:48:02,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:02,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-09-01 03:48:02,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 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 03:48:02,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:02,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:02,028 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 259 flow. Second operand 3 states and 589 transitions. [2023-09-01 03:48:02,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 355 flow [2023-09-01 03:48:02,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:02,031 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 222 flow [2023-09-01 03:48:02,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-09-01 03:48:02,032 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-09-01 03:48:02,032 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 222 flow [2023-09-01 03:48:02,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 03:48:02,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:02,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:48:02,045 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 03:48:02,245 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 03:48:02,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:02,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash 979074907, now seen corresponding path program 1 times [2023-09-01 03:48:02,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:02,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429121291] [2023-09-01 03:48:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:02,247 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 03:48:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:02,248 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 03:48:02,251 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 03:48:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:48:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:02,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:02,415 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 03:48:02,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 03:48:02,674 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 03:48:02,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 03:48:02,778 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 03:48:02,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:02,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429121291] [2023-09-01 03:48:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429121291] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:02,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:02,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:48:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992860294] [2023-09-01 03:48:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:02,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:48:02,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:48:02,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:48:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 457 [2023-09-01 03:48:02,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 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 03:48:02,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:02,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 457 [2023-09-01 03:48:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:04,284 INFO L130 PetriNetUnfolder]: 9707/12563 cut-off events. [2023-09-01 03:48:04,284 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-09-01 03:48:04,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25231 conditions, 12563 events. 9707/12563 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 64156 event pairs, 4827 based on Foata normal form. 0/3790 useless extension candidates. Maximal degree in co-relation 25216. Up to 12416 conditions per place. [2023-09-01 03:48:04,333 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 03:48:04,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 330 flow [2023-09-01 03:48:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:48:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:48:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-09-01 03:48:04,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42815463165572576 [2023-09-01 03:48:04,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-09-01 03:48:04,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-09-01 03:48:04,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:04,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-09-01 03:48:04,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 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 03:48:04,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:04,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:04,341 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 222 flow. Second operand 3 states and 587 transitions. [2023-09-01 03:48:04,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 330 flow [2023-09-01 03:48:04,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:04,343 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2023-09-01 03:48:04,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-09-01 03:48:04,344 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-09-01 03:48:04,344 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2023-09-01 03:48:04,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 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 03:48:04,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:04,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:48:04,357 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 03:48:04,554 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 03:48:04,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:04,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash 979074905, now seen corresponding path program 1 times [2023-09-01 03:48:04,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:04,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144357098] [2023-09-01 03:48:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:04,556 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 03:48:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:04,557 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 03:48:04,558 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 03:48:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:48:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:04,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:04,726 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 03:48:04,726 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 03:48:04,741 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 39 treesize of output 37 [2023-09-01 03:48:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:04,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:48:04,845 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 03:48:04,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:04,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:04,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144357098] [2023-09-01 03:48:04,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144357098] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:04,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:04,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:48:04,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821558319] [2023-09-01 03:48:04,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:04,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:48:04,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:04,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:48:04,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:48:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-09-01 03:48:05,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 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 03:48:05,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:05,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-09-01 03:48:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:06,037 INFO L130 PetriNetUnfolder]: 9302/12017 cut-off events. [2023-09-01 03:48:06,037 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-09-01 03:48:06,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24140 conditions, 12017 events. 9302/12017 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 60998 event pairs, 4611 based on Foata normal form. 0/3694 useless extension candidates. Maximal degree in co-relation 24124. Up to 11870 conditions per place. [2023-09-01 03:48:06,100 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-09-01 03:48:06,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 323 flow [2023-09-01 03:48:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:48:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:48:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-09-01 03:48:06,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288840262582057 [2023-09-01 03:48:06,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-09-01 03:48:06,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-09-01 03:48:06,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:06,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-09-01 03:48:06,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 03:48:06,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:06,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:06,108 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 588 transitions. [2023-09-01 03:48:06,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 323 flow [2023-09-01 03:48:06,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:06,110 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2023-09-01 03:48:06,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-09-01 03:48:06,111 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-09-01 03:48:06,111 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2023-09-01 03:48:06,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 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 03:48:06,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:06,112 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:48:06,123 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 03:48:06,320 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 03:48:06,321 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:06,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash 259225558, now seen corresponding path program 2 times [2023-09-01 03:48:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:06,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074795455] [2023-09-01 03:48:06,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:48:06,322 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 03:48:06,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:06,323 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 03:48:06,324 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 03:48:06,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:48:06,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:06,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:48:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:06,479 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:48:06,480 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:48:06,624 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 03:48:06,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:07,120 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 03:48:07,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:07,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074795455] [2023-09-01 03:48:07,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074795455] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:07,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:07,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:48:07,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014642904] [2023-09-01 03:48:07,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:07,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:48:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:48:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:48:09,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-09-01 03:48:09,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 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 03:48:09,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:09,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-09-01 03:48:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:12,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:48:14,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:48:16,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:48:18,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:48:20,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:48:27,854 INFO L130 PetriNetUnfolder]: 30876/39910 cut-off events. [2023-09-01 03:48:27,854 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-09-01 03:48:27,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80071 conditions, 39910 events. 30876/39910 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 221455 event pairs, 15343 based on Foata normal form. 12/12409 useless extension candidates. Maximal degree in co-relation 80054. Up to 3962 conditions per place. [2023-09-01 03:48:28,062 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 345 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2023-09-01 03:48:28,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 380 transitions, 1774 flow [2023-09-01 03:48:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:48:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:48:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2429 transitions. [2023-09-01 03:48:28,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429248723559446 [2023-09-01 03:48:28,071 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2429 transitions. [2023-09-01 03:48:28,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2429 transitions. [2023-09-01 03:48:28,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:28,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2429 transitions. [2023-09-01 03:48:28,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.41666666666666) internal successors, (2429), 12 states have internal predecessors, (2429), 0 states have call successors, (0), 0 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 03:48:28,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 03:48:28,086 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 03:48:28,086 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 12 states and 2429 transitions. [2023-09-01 03:48:28,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 380 transitions, 1774 flow [2023-09-01 03:48:28,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 380 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:28,092 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 459 flow [2023-09-01 03:48:28,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-09-01 03:48:28,092 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-09-01 03:48:28,093 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 459 flow [2023-09-01 03:48:28,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 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 03:48:28,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:28,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:48:28,108 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 03:48:28,303 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 03:48:28,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:28,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 286544683, now seen corresponding path program 1 times [2023-09-01 03:48:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:28,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487752583] [2023-09-01 03:48:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:28,304 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 03:48:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:28,306 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 03:48:28,308 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 03:48:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:48:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:28,421 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 03:48:28,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:28,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487752583] [2023-09-01 03:48:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487752583] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:28,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:48:28,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50345209] [2023-09-01 03:48:28,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:48:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:48:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:48:28,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-09-01 03:48:28,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 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 03:48:28,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:28,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-09-01 03:48:28,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:32,097 INFO L130 PetriNetUnfolder]: 30944/40180 cut-off events. [2023-09-01 03:48:32,097 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-09-01 03:48:32,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80768 conditions, 40180 events. 30944/40180 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 225046 event pairs, 15370 based on Foata normal form. 270/12859 useless extension candidates. Maximal degree in co-relation 80743. Up to 39396 conditions per place. [2023-09-01 03:48:32,316 INFO L137 encePairwiseOnDemand]: 443/457 looper letters, 97 selfloop transitions, 3 changer transitions 1/104 dead transitions. [2023-09-01 03:48:32,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 841 flow [2023-09-01 03:48:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:48:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:48:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 784 transitions. [2023-09-01 03:48:32,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288840262582057 [2023-09-01 03:48:32,320 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 784 transitions. [2023-09-01 03:48:32,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 784 transitions. [2023-09-01 03:48:32,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:32,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 784 transitions. [2023-09-01 03:48:32,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 03:48:32,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:48:32,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:48:32,325 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 459 flow. Second operand 4 states and 784 transitions. [2023-09-01 03:48:32,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 841 flow [2023-09-01 03:48:32,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 758 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 03:48:32,330 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 429 flow [2023-09-01 03:48:32,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=429, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-09-01 03:48:32,331 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-09-01 03:48:32,331 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 429 flow [2023-09-01 03:48:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 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 03:48:32,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:32,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:32,345 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 03:48:32,541 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 03:48:32,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:32,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:32,542 INFO L85 PathProgramCache]: Analyzing trace with hash 293171228, now seen corresponding path program 1 times [2023-09-01 03:48:32,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:32,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261799099] [2023-09-01 03:48:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:32,542 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 03:48:32,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:32,543 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 03:48:32,547 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 03:48:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:32,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:48:32,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:32,692 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:48:32,692 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 33 treesize of output 44 [2023-09-01 03:48:32,724 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:48:32,725 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:48:32,739 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 03:48:32,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:32,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:32,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261799099] [2023-09-01 03:48:32,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261799099] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:32,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:48:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303017622] [2023-09-01 03:48:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:32,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:48:32,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:48:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:48:32,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-09-01 03:48:32,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 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 03:48:32,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:32,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-09-01 03:48:32,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:36,431 INFO L130 PetriNetUnfolder]: 29254/37870 cut-off events. [2023-09-01 03:48:36,431 INFO L131 PetriNetUnfolder]: For 3109/3109 co-relation queries the response was YES. [2023-09-01 03:48:36,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97436 conditions, 37870 events. 29254/37870 cut-off events. For 3109/3109 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 209972 event pairs, 14450 based on Foata normal form. 0/12210 useless extension candidates. Maximal degree in co-relation 97409. Up to 37350 conditions per place. [2023-09-01 03:48:36,696 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 70 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 03:48:36,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 567 flow [2023-09-01 03:48:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:48:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:48:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-09-01 03:48:36,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208606856309263 [2023-09-01 03:48:36,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-09-01 03:48:36,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-09-01 03:48:36,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:36,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-09-01 03:48:36,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 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 03:48:36,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:36,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:36,704 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 429 flow. Second operand 3 states and 577 transitions. [2023-09-01 03:48:36,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 567 flow [2023-09-01 03:48:36,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 561 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:36,709 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 421 flow [2023-09-01 03:48:36,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-09-01 03:48:36,710 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 15 predicate places. [2023-09-01 03:48:36,710 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 421 flow [2023-09-01 03:48:36,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 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 03:48:36,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:36,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:36,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:36,922 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 03:48:36,923 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:36,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash 293171230, now seen corresponding path program 1 times [2023-09-01 03:48:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:36,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148041470] [2023-09-01 03:48:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:36,924 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 03:48:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:36,926 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 03:48:36,926 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 03:48:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:48:37,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:37,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:37,240 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 03:48:37,240 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 15 treesize of output 38 [2023-09-01 03:48:37,255 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 298 treesize of output 290 [2023-09-01 03:48:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:37,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:48:37,391 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 03:48:37,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:37,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148041470] [2023-09-01 03:48:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148041470] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:37,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:37,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:48:37,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019571362] [2023-09-01 03:48:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:48:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:48:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:48:37,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 457 [2023-09-01 03:48:37,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 421 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:37,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:37,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 457 [2023-09-01 03:48:37,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:41,149 INFO L130 PetriNetUnfolder]: 27434/35430 cut-off events. [2023-09-01 03:48:41,149 INFO L131 PetriNetUnfolder]: For 3091/3091 co-relation queries the response was YES. [2023-09-01 03:48:41,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90894 conditions, 35430 events. 27434/35430 cut-off events. For 3091/3091 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 194183 event pairs, 13500 based on Foata normal form. 0/11820 useless extension candidates. Maximal degree in co-relation 90866. Up to 34910 conditions per place. [2023-09-01 03:48:41,368 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 68 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-09-01 03:48:41,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 555 flow [2023-09-01 03:48:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:48:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:48:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-09-01 03:48:41,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-09-01 03:48:41,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-09-01 03:48:41,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-09-01 03:48:41,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:41,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-09-01 03:48:41,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 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 03:48:41,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:41,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:48:41,373 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 421 flow. Second operand 3 states and 578 transitions. [2023-09-01 03:48:41,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 555 flow [2023-09-01 03:48:41,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:41,376 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 418 flow [2023-09-01 03:48:41,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-09-01 03:48:41,377 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-09-01 03:48:41,377 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 418 flow [2023-09-01 03:48:41,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:41,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:41,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:41,387 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 03:48:41,578 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 03:48:41,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:41,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash -526619824, now seen corresponding path program 1 times [2023-09-01 03:48:41,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:41,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977250449] [2023-09-01 03:48:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:41,579 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 03:48:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:41,580 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 03:48:41,582 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 03:48:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:41,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:48:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:41,722 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:48:41,723 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:48:41,744 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:48:41,744 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 03:48:41,762 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 03:48:41,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:41,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:41,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977250449] [2023-09-01 03:48:41,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977250449] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:41,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:41,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:48:41,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805071037] [2023-09-01 03:48:41,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:41,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:48:41,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:48:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:48:41,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-09-01 03:48:41,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 418 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 03:48:41,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:41,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-09-01 03:48:41,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:44,454 INFO L130 PetriNetUnfolder]: 17174/22510 cut-off events. [2023-09-01 03:48:44,454 INFO L131 PetriNetUnfolder]: For 2621/2621 co-relation queries the response was YES. [2023-09-01 03:48:44,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56985 conditions, 22510 events. 17174/22510 cut-off events. For 2621/2621 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 121006 event pairs, 8530 based on Foata normal form. 0/8620 useless extension candidates. Maximal degree in co-relation 56956. Up to 22167 conditions per place. [2023-09-01 03:48:44,616 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 54 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2023-09-01 03:48:44,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 538 flow [2023-09-01 03:48:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:48:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:48:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-09-01 03:48:44,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048140043763676 [2023-09-01 03:48:44,619 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-09-01 03:48:44,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-09-01 03:48:44,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:44,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-09-01 03:48:44,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 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 03:48:44,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:48:44,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:48:44,625 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 418 flow. Second operand 4 states and 740 transitions. [2023-09-01 03:48:44,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 538 flow [2023-09-01 03:48:44,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:44,629 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 429 flow [2023-09-01 03:48:44,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=429, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-09-01 03:48:44,630 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 13 predicate places. [2023-09-01 03:48:44,630 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 429 flow [2023-09-01 03:48:44,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 03:48:44,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:44,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:44,641 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 (13)] Ended with exit code 0 [2023-09-01 03:48:44,840 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 03:48:44,840 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:48:44,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash -526619823, now seen corresponding path program 1 times [2023-09-01 03:48:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:44,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452996235] [2023-09-01 03:48:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:44,842 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 03:48:44,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:44,843 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 03:48:44,846 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 03:48:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:44,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:48:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:45,061 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:48:45,061 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:48:45,155 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:48:45,155 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:48:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:45,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:48:45,300 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:48:45,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:48:45,359 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 03:48:45,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:48,337 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 03:48:48,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452996235] [2023-09-01 03:48:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452996235] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:48,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:48:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661887185] [2023-09-01 03:48:48,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:48:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:48:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:48:54,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:48:55,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 457 [2023-09-01 03:48:55,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 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 03:48:55,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:55,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 457 [2023-09-01 03:48:55,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:02,472 WARN L222 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:49:12,991 WARN L222 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:49:21,564 WARN L222 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:49:28,428 INFO L130 PetriNetUnfolder]: 34766/46026 cut-off events. [2023-09-01 03:49:28,428 INFO L131 PetriNetUnfolder]: For 6942/6942 co-relation queries the response was YES. [2023-09-01 03:49:28,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114881 conditions, 46026 events. 34766/46026 cut-off events. For 6942/6942 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 274513 event pairs, 17490 based on Foata normal form. 0/19856 useless extension candidates. Maximal degree in co-relation 114851. Up to 22251 conditions per place. [2023-09-01 03:49:28,698 INFO L137 encePairwiseOnDemand]: 447/457 looper letters, 151 selfloop transitions, 31 changer transitions 1/186 dead transitions. [2023-09-01 03:49:28,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 186 transitions, 1298 flow [2023-09-01 03:49:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:49:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:49:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2528 transitions. [2023-09-01 03:49:28,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687819110138585 [2023-09-01 03:49:28,705 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2528 transitions. [2023-09-01 03:49:28,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2528 transitions. [2023-09-01 03:49:28,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:28,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2528 transitions. [2023-09-01 03:49:28,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.53333333333333) internal successors, (2528), 15 states have internal predecessors, (2528), 0 states have call successors, (0), 0 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 03:49:28,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 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 03:49:28,720 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 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 03:49:28,720 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 429 flow. Second operand 15 states and 2528 transitions. [2023-09-01 03:49:28,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 186 transitions, 1298 flow [2023-09-01 03:49:28,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 186 transitions, 1285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:49:28,727 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 676 flow [2023-09-01 03:49:28,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=676, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-09-01 03:49:28,728 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-09-01 03:49:28,728 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 676 flow [2023-09-01 03:49:28,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 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 03:49:28,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:28,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:49:28,739 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 03:49:28,938 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 03:49:28,938 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:49:28,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash 731257828, now seen corresponding path program 1 times [2023-09-01 03:49:28,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:28,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923593374] [2023-09-01 03:49:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:49:28,940 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 03:49:28,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:28,940 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 03:49:28,942 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 03:49:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:49:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 03:49:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:29,050 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 03:49:29,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:49:29,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923593374] [2023-09-01 03:49:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923593374] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:49:29,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:49:29,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:49:29,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37470751] [2023-09-01 03:49:29,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:49:29,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:49:29,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:49:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:49:29,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2023-09-01 03:49:29,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 676 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 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 03:49:29,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:29,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2023-09-01 03:49:29,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:33,456 INFO L130 PetriNetUnfolder]: 28396/38096 cut-off events. [2023-09-01 03:49:33,456 INFO L131 PetriNetUnfolder]: For 20321/20321 co-relation queries the response was YES. [2023-09-01 03:49:33,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102802 conditions, 38096 events. 28396/38096 cut-off events. For 20321/20321 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 229998 event pairs, 3920 based on Foata normal form. 880/19496 useless extension candidates. Maximal degree in co-relation 102766. Up to 36321 conditions per place. [2023-09-01 03:49:33,687 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 94 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-09-01 03:49:33,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 918 flow [2023-09-01 03:49:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:49:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:49:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-09-01 03:49:33,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412837345003647 [2023-09-01 03:49:33,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-09-01 03:49:33,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-09-01 03:49:33,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:33,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-09-01 03:49:33,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 03:49:33,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:49:33,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:49:33,693 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 676 flow. Second operand 3 states and 605 transitions. [2023-09-01 03:49:33,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 918 flow [2023-09-01 03:49:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 897 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 03:49:33,716 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 684 flow [2023-09-01 03:49:33,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=684, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-09-01 03:49:33,716 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-09-01 03:49:33,717 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 684 flow [2023-09-01 03:49:33,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 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 03:49:33,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:33,717 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:49:33,727 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 (15)] Ended with exit code 0 [2023-09-01 03:49:33,926 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 03:49:33,926 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:49:33,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1102361743, now seen corresponding path program 2 times [2023-09-01 03:49:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:33,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298758124] [2023-09-01 03:49:33,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:49:33,927 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 03:49:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:33,928 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 03:49:33,929 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 03:49:34,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:49:34,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:49:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:49:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:34,167 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:49:34,167 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:49:34,300 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:49:34,300 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:49:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:49:34,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 03:49:34,478 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:49:34,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:49:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:49:34,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:49:34,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:34,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298758124] [2023-09-01 03:49:34,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298758124] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:49:34,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:49:34,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:49:34,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858623214] [2023-09-01 03:49:34,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:49:34,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:49:34,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:34,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:49:34,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:49:35,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 457 [2023-09-01 03:49:35,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 684 flow. Second operand has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 03:49:35,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:35,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 457 [2023-09-01 03:49:35,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:38,305 INFO L130 PetriNetUnfolder]: 19296/26636 cut-off events. [2023-09-01 03:49:38,305 INFO L131 PetriNetUnfolder]: For 29049/29049 co-relation queries the response was YES. [2023-09-01 03:49:38,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75955 conditions, 26636 events. 19296/26636 cut-off events. For 29049/29049 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 163759 event pairs, 8160 based on Foata normal form. 1450/14316 useless extension candidates. Maximal degree in co-relation 75917. Up to 26203 conditions per place. [2023-09-01 03:49:38,470 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 71 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-09-01 03:49:38,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 818 flow [2023-09-01 03:49:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:49:38,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:49:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-09-01 03:49:38,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39223194748358864 [2023-09-01 03:49:38,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-09-01 03:49:38,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-09-01 03:49:38,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:38,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-09-01 03:49:38,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 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 03:49:38,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:49:38,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:49:38,477 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 684 flow. Second operand 4 states and 717 transitions. [2023-09-01 03:49:38,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 818 flow [2023-09-01 03:49:38,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 800 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 03:49:38,490 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 658 flow [2023-09-01 03:49:38,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=658, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2023-09-01 03:49:38,491 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-09-01 03:49:38,491 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 658 flow [2023-09-01 03:49:38,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 03:49:38,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:38,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:49:38,501 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 03:49:38,701 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 03:49:38,701 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:49:38,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2098642692, now seen corresponding path program 1 times [2023-09-01 03:49:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349273548] [2023-09-01 03:49:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:49:38,702 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 03:49:38,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:38,703 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 03:49:38,705 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 03:49:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:49:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:49:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:38,814 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 03:49:38,865 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 03:49:38,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:49:38,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:38,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349273548] [2023-09-01 03:49:38,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349273548] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:49:38,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:49:38,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:49:38,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829360970] [2023-09-01 03:49:38,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:49:38,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:49:38,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:38,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:49:38,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:49:39,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-09-01 03:49:39,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 658 flow. Second operand has 4 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 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 03:49:39,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:39,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-09-01 03:49:39,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:41,246 INFO L130 PetriNetUnfolder]: 12496/17776 cut-off events. [2023-09-01 03:49:41,246 INFO L131 PetriNetUnfolder]: For 4149/4149 co-relation queries the response was YES. [2023-09-01 03:49:41,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 17776 events. 12496/17776 cut-off events. For 4149/4149 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 109186 event pairs, 5300 based on Foata normal form. 0/9916 useless extension candidates. Maximal degree in co-relation 43388. Up to 17344 conditions per place. [2023-09-01 03:49:41,332 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 64 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2023-09-01 03:49:41,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 814 flow [2023-09-01 03:49:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:49:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:49:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-09-01 03:49:41,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40153172866520787 [2023-09-01 03:49:41,334 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-09-01 03:49:41,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-09-01 03:49:41,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:41,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-09-01 03:49:41,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 03:49:41,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:49:41,337 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:49:41,337 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 658 flow. Second operand 4 states and 734 transitions. [2023-09-01 03:49:41,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 814 flow [2023-09-01 03:49:41,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 801 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:49:41,343 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 673 flow [2023-09-01 03:49:41,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=673, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-09-01 03:49:41,343 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 29 predicate places. [2023-09-01 03:49:41,344 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 673 flow [2023-09-01 03:49:41,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 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 03:49:41,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:41,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:49:41,357 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 (17)] Ended with exit code 0 [2023-09-01 03:49:41,553 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 03:49:41,554 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:49:41,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2098642691, now seen corresponding path program 1 times [2023-09-01 03:49:41,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883756819] [2023-09-01 03:49:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:49:41,555 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 03:49:41,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:41,556 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 03:49:41,556 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 03:49:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:49:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:49:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:41,661 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 03:49:41,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:49:41,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:41,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883756819] [2023-09-01 03:49:41,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883756819] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:49:41,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:49:41,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:49:41,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442215584] [2023-09-01 03:49:41,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:49:41,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:49:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:49:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:49:41,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2023-09-01 03:49:41,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 673 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 03:49:41,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:41,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2023-09-01 03:49:41,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:43,702 INFO L130 PetriNetUnfolder]: 11716/17096 cut-off events. [2023-09-01 03:49:43,702 INFO L131 PetriNetUnfolder]: For 3741/3741 co-relation queries the response was YES. [2023-09-01 03:49:43,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 17096 events. 11716/17096 cut-off events. For 3741/3741 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 102946 event pairs, 2040 based on Foata normal form. 620/10486 useless extension candidates. Maximal degree in co-relation 41112. Up to 13741 conditions per place. [2023-09-01 03:49:43,772 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 87 selfloop transitions, 3 changer transitions 2/95 dead transitions. [2023-09-01 03:49:43,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 889 flow [2023-09-01 03:49:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:49:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:49:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-09-01 03:49:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43544857768052514 [2023-09-01 03:49:43,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-09-01 03:49:43,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-09-01 03:49:43,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:43,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-09-01 03:49:43,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 03:49:43,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:49:43,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 03:49:43,776 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 673 flow. Second operand 3 states and 597 transitions. [2023-09-01 03:49:43,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 889 flow [2023-09-01 03:49:43,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 871 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:49:43,782 INFO L231 Difference]: Finished difference. Result has 89 places, 84 transitions, 664 flow [2023-09-01 03:49:43,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=664, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2023-09-01 03:49:43,782 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-09-01 03:49:43,782 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 664 flow [2023-09-01 03:49:43,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 03:49:43,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:43,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:49:43,793 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 03:49:43,988 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 03:49:43,989 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:49:43,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:43,989 INFO L85 PathProgramCache]: Analyzing trace with hash 508704700, now seen corresponding path program 1 times [2023-09-01 03:49:43,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:43,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924103307] [2023-09-01 03:49:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:49:43,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:49:43,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:43,991 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 03:49:43,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:49:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:49:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:49:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:44,166 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 03:49:44,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:49:44,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:44,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924103307] [2023-09-01 03:49:44,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924103307] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:49:44,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:49:44,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:49:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699312150] [2023-09-01 03:49:44,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:49:44,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:49:44,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:44,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:49:44,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:49:44,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-09-01 03:49:44,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 664 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 03:49:44,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:44,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-09-01 03:49:44,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:46,440 INFO L130 PetriNetUnfolder]: 10660/15618 cut-off events. [2023-09-01 03:49:46,441 INFO L131 PetriNetUnfolder]: For 4298/4298 co-relation queries the response was YES. [2023-09-01 03:49:46,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44506 conditions, 15618 events. 10660/15618 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 93046 event pairs, 4050 based on Foata normal form. 30/9117 useless extension candidates. Maximal degree in co-relation 44468. Up to 15053 conditions per place. [2023-09-01 03:49:46,531 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 66 selfloop transitions, 14 changer transitions 16/99 dead transitions. [2023-09-01 03:49:46,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 918 flow [2023-09-01 03:49:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:49:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:49:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-09-01 03:49:46,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41575492341356673 [2023-09-01 03:49:46,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-09-01 03:49:46,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-09-01 03:49:46,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:46,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-09-01 03:49:46,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 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 03:49:46,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:49:46,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:49:46,537 INFO L175 Difference]: Start difference. First operand has 89 places, 84 transitions, 664 flow. Second operand 4 states and 760 transitions. [2023-09-01 03:49:46,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 918 flow [2023-09-01 03:49:46,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 99 transitions, 913 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:49:46,541 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 706 flow [2023-09-01 03:49:46,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2023-09-01 03:49:46,542 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2023-09-01 03:49:46,542 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 706 flow [2023-09-01 03:49:46,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 03:49:46,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:46,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:49:46,549 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 03:49:46,742 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 03:49:46,743 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:49:46,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash -376902577, now seen corresponding path program 1 times [2023-09-01 03:49:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210833122] [2023-09-01 03:49:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:49:46,744 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 03:49:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:46,746 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 03:49:46,747 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 03:49:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:49:46,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:49:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:46,879 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:49:47,143 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 03:49:47,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:49:48,506 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 03:49:48,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210833122] [2023-09-01 03:49:48,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210833122] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:49:48,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:49:48,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 03:49:48,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735182446] [2023-09-01 03:49:48,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:49:48,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:49:48,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:49:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:49:51,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 457 [2023-09-01 03:49:51,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 03:49:51,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:51,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 457 [2023-09-01 03:49:51,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:56,176 INFO L130 PetriNetUnfolder]: 9142/13440 cut-off events. [2023-09-01 03:49:56,176 INFO L131 PetriNetUnfolder]: For 6653/6653 co-relation queries the response was YES. [2023-09-01 03:49:56,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39121 conditions, 13440 events. 9142/13440 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 78705 event pairs, 3402 based on Foata normal form. 288/9078 useless extension candidates. Maximal degree in co-relation 39081. Up to 10045 conditions per place. [2023-09-01 03:49:56,257 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 96 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2023-09-01 03:49:56,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1148 flow [2023-09-01 03:49:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:49:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:49:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1389 transitions. [2023-09-01 03:49:56,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799234135667396 [2023-09-01 03:49:56,261 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1389 transitions. [2023-09-01 03:49:56,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1389 transitions. [2023-09-01 03:49:56,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:56,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1389 transitions. [2023-09-01 03:49:56,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 173.625) internal successors, (1389), 8 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 03:49:56,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 03:49:56,266 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 03:49:56,266 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 706 flow. Second operand 8 states and 1389 transitions. [2023-09-01 03:49:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1148 flow [2023-09-01 03:49:56,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 1101 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 03:49:56,288 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 770 flow [2023-09-01 03:49:56,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=770, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2023-09-01 03:49:56,289 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2023-09-01 03:49:56,289 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 770 flow [2023-09-01 03:49:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 03:49:56,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:56,289 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:49:56,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:49:56,489 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 03:49:56,490 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:49:56,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1003449302, now seen corresponding path program 3 times [2023-09-01 03:49:56,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497466919] [2023-09-01 03:49:56,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:49:56,491 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 03:49:56,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:56,492 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 03:49:56,493 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 03:49:56,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:49:56,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:49:56,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:49:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:56,788 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:49:56,788 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:49:57,320 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 03:49:57,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:50:00,131 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 03:50:00,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:50:00,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497466919] [2023-09-01 03:50:00,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497466919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:50:00,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:50:00,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:50:00,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217071465] [2023-09-01 03:50:00,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:50:00,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:50:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:50:00,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:50:00,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:50:20,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-09-01 03:50:20,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 770 flow. Second operand has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 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 03:50:20,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:50:20,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-09-01 03:50:20,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:50:29,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:31,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:33,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:35,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:37,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:39,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:41,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:43,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:45,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:47,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:50:59,986 INFO L130 PetriNetUnfolder]: 12664/18582 cut-off events. [2023-09-01 03:50:59,986 INFO L131 PetriNetUnfolder]: For 15452/15452 co-relation queries the response was YES. [2023-09-01 03:51:00,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57279 conditions, 18582 events. 12664/18582 cut-off events. For 15452/15452 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 112260 event pairs, 4734 based on Foata normal form. 24/13545 useless extension candidates. Maximal degree in co-relation 57239. Up to 7561 conditions per place. [2023-09-01 03:51:00,186 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 337 selfloop transitions, 65 changer transitions 0/405 dead transitions. [2023-09-01 03:51:00,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 405 transitions, 3072 flow [2023-09-01 03:51:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:51:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:51:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4417 transitions. [2023-09-01 03:51:00,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027169948942378 [2023-09-01 03:51:00,194 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4417 transitions. [2023-09-01 03:51:00,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4417 transitions. [2023-09-01 03:51:00,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:00,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4417 transitions. [2023-09-01 03:51:00,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 184.04166666666666) internal successors, (4417), 24 states have internal predecessors, (4417), 0 states have call successors, (0), 0 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 03:51:00,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 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 03:51:00,209 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 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 03:51:00,209 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 770 flow. Second operand 24 states and 4417 transitions. [2023-09-01 03:51:00,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 405 transitions, 3072 flow [2023-09-01 03:51:00,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 405 transitions, 2914 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-09-01 03:51:00,240 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 1150 flow [2023-09-01 03:51:00,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1150, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-09-01 03:51:00,241 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 70 predicate places. [2023-09-01 03:51:00,241 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 1150 flow [2023-09-01 03:51:00,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 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 03:51:00,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:00,242 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:51:00,253 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 03:51:00,452 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 03:51:00,453 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:51:00,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1868282756, now seen corresponding path program 2 times [2023-09-01 03:51:00,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:00,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726699547] [2023-09-01 03:51:00,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:51:00,454 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 03:51:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:00,454 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 03:51:00,455 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 03:51:00,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:51:00,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:51:00,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:51:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:00,581 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:51:00,736 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 03:51:00,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:51:00,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:51:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726699547] [2023-09-01 03:51:00,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726699547] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:51:00,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:51:00,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:51:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278976103] [2023-09-01 03:51:00,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:51:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:51:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:51:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:51:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:51:01,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-09-01 03:51:01,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 1150 flow. Second operand has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 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 03:51:01,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:51:01,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-09-01 03:51:01,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:02,904 INFO L130 PetriNetUnfolder]: 8452/12750 cut-off events. [2023-09-01 03:51:02,905 INFO L131 PetriNetUnfolder]: For 12603/12603 co-relation queries the response was YES. [2023-09-01 03:51:02,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36130 conditions, 12750 events. 8452/12750 cut-off events. For 12603/12603 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 75914 event pairs, 2952 based on Foata normal form. 1944/10626 useless extension candidates. Maximal degree in co-relation 36077. Up to 12285 conditions per place. [2023-09-01 03:51:02,967 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 69 selfloop transitions, 41 changer transitions 0/113 dead transitions. [2023-09-01 03:51:02,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 113 transitions, 1354 flow [2023-09-01 03:51:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:51:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:51:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2023-09-01 03:51:02,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40043763676148797 [2023-09-01 03:51:02,969 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2023-09-01 03:51:02,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2023-09-01 03:51:02,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:02,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2023-09-01 03:51:02,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 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 03:51:02,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:51:02,972 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:51:02,972 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 1150 flow. Second operand 4 states and 732 transitions. [2023-09-01 03:51:02,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 113 transitions, 1354 flow [2023-09-01 03:51:02,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 113 transitions, 1191 flow, removed 35 selfloop flow, removed 12 redundant places. [2023-09-01 03:51:02,980 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 1053 flow [2023-09-01 03:51:02,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1053, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2023-09-01 03:51:02,981 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2023-09-01 03:51:02,981 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 1053 flow [2023-09-01 03:51:02,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 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 03:51:02,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:02,981 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-09-01 03:51:02,988 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 (22)] Ended with exit code 0 [2023-09-01 03:51:03,184 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 03:51:03,185 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:51:03,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:03,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1687515259, now seen corresponding path program 1 times [2023-09-01 03:51:03,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:03,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434727608] [2023-09-01 03:51:03,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:51:03,186 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 03:51:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:03,187 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 03:51:03,188 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 03:51:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:51:03,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:51:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:03,324 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:51:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:51:04,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:51:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:51:09,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:51:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434727608] [2023-09-01 03:51:09,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434727608] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:51:09,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:51:09,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-09-01 03:51:09,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34456807] [2023-09-01 03:51:09,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:51:09,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 03:51:09,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:51:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 03:51:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-09-01 03:51:46,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 457 [2023-09-01 03:51:46,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 1053 flow. Second operand has 30 states, 30 states have (on average 169.03333333333333) internal successors, (5071), 30 states have internal predecessors, (5071), 0 states have call successors, (0), 0 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 03:51:46,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:51:46,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 457 [2023-09-01 03:51:46,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:58,345 WARN L222 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:52:00,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:02,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:03,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:05,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:07,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:09,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:12,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:14,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:16,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:18,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:20,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:22,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:24,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:52:30,339 WARN L222 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:52:36,390 WARN L222 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:53:08,088 INFO L130 PetriNetUnfolder]: 18284/27570 cut-off events. [2023-09-01 03:53:08,088 INFO L131 PetriNetUnfolder]: For 16709/16709 co-relation queries the response was YES. [2023-09-01 03:53:08,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77700 conditions, 27570 events. 18284/27570 cut-off events. For 16709/16709 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 172403 event pairs, 6396 based on Foata normal form. 60/18891 useless extension candidates. Maximal degree in co-relation 77649. Up to 11233 conditions per place. [2023-09-01 03:53:08,357 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 689 selfloop transitions, 77 changer transitions 0/769 dead transitions. [2023-09-01 03:53:08,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 769 transitions, 5616 flow [2023-09-01 03:53:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 03:53:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 03:53:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5643 transitions. [2023-09-01 03:53:08,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115973741794311 [2023-09-01 03:53:08,364 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5643 transitions. [2023-09-01 03:53:08,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5643 transitions. [2023-09-01 03:53:08,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:08,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5643 transitions. [2023-09-01 03:53:08,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 188.1) internal successors, (5643), 30 states have internal predecessors, (5643), 0 states have call successors, (0), 0 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 03:53:08,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 457.0) internal successors, (14167), 31 states have internal predecessors, (14167), 0 states have call successors, (0), 0 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 03:53:08,378 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 457.0) internal successors, (14167), 31 states have internal predecessors, (14167), 0 states have call successors, (0), 0 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 03:53:08,378 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 1053 flow. Second operand 30 states and 5643 transitions. [2023-09-01 03:53:08,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 769 transitions, 5616 flow [2023-09-01 03:53:08,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 769 transitions, 5486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:53:08,396 INFO L231 Difference]: Finished difference. Result has 161 places, 134 transitions, 1490 flow [2023-09-01 03:53:08,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1490, PETRI_PLACES=161, PETRI_TRANSITIONS=134} [2023-09-01 03:53:08,397 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 102 predicate places. [2023-09-01 03:53:08,397 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 134 transitions, 1490 flow [2023-09-01 03:53:08,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 169.03333333333333) internal successors, (5071), 30 states have internal predecessors, (5071), 0 states have call successors, (0), 0 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 03:53:08,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:08,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:53:08,407 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 03:53:08,600 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 03:53:08,601 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:53:08,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1465022338, now seen corresponding path program 1 times [2023-09-01 03:53:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:08,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014617433] [2023-09-01 03:53:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:53:08,601 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 03:53:08,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:08,602 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 03:53:08,605 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 03:53:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:53:08,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:53:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:53:09,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:53:09,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:53:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014617433] [2023-09-01 03:53:09,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014617433] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:53:09,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:53:09,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:53:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354463369] [2023-09-01 03:53:09,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:53:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:53:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:53:09,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:53:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:53:09,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-09-01 03:53:09,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 134 transitions, 1490 flow. Second operand has 6 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 0 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 03:53:09,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:53:09,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-09-01 03:53:09,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:53:15,634 INFO L130 PetriNetUnfolder]: 25975/41236 cut-off events. [2023-09-01 03:53:15,634 INFO L131 PetriNetUnfolder]: For 14526/14526 co-relation queries the response was YES. [2023-09-01 03:53:16,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114564 conditions, 41236 events. 25975/41236 cut-off events. For 14526/14526 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 297632 event pairs, 8112 based on Foata normal form. 78/29302 useless extension candidates. Maximal degree in co-relation 114496. Up to 18045 conditions per place. [2023-09-01 03:53:16,164 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 136 selfloop transitions, 30 changer transitions 2/170 dead transitions. [2023-09-01 03:53:16,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 170 transitions, 1936 flow [2023-09-01 03:53:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:53:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:53:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-09-01 03:53:16,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-09-01 03:53:16,166 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-09-01 03:53:16,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-09-01 03:53:16,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:16,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-09-01 03:53:16,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 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 03:53:16,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 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 03:53:16,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 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 03:53:16,169 INFO L175 Difference]: Start difference. First operand has 161 places, 134 transitions, 1490 flow. Second operand 6 states and 1156 transitions. [2023-09-01 03:53:16,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 170 transitions, 1936 flow [2023-09-01 03:53:16,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 170 transitions, 1818 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-09-01 03:53:16,189 INFO L231 Difference]: Finished difference. Result has 155 places, 136 transitions, 1446 flow [2023-09-01 03:53:16,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1446, PETRI_PLACES=155, PETRI_TRANSITIONS=136} [2023-09-01 03:53:16,190 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 96 predicate places. [2023-09-01 03:53:16,190 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 136 transitions, 1446 flow [2023-09-01 03:53:16,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 0 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 03:53:16,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:16,190 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-09-01 03:53:16,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 03:53:16,401 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 03:53:16,401 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:53:16,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1181897686, now seen corresponding path program 4 times [2023-09-01 03:53:16,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:16,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462513068] [2023-09-01 03:53:16,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:53:16,402 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 03:53:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:16,403 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 03:53:16,404 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 03:53:16,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:53:16,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:53:16,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 03:53:16,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:16,722 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:53:16,722 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:53:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:53:18,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:53:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:53:28,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:53:28,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462513068] [2023-09-01 03:53:28,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462513068] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:53:28,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:53:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-09-01 03:53:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046304026] [2023-09-01 03:53:28,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:53:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 03:53:28,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:53:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 03:53:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-09-01 03:55:01,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-09-01 03:55:01,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 136 transitions, 1446 flow. Second operand has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 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 03:55:01,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:55:01,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-09-01 03:55:01,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:55:35,399 WARN L222 SmtUtils]: Spent 19.23s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:55:53,172 WARN L222 SmtUtils]: Spent 14.99s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:55:55,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:57,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:55:59,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:01,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:03,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:05,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:07,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:09,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:11,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:13,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:15,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:17,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:19,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:21,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:23,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:25,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:27,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:29,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:31,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:33,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:35,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:37,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:56:53,316 WARN L222 SmtUtils]: Spent 13.94s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:57:07,996 WARN L222 SmtUtils]: Spent 12.00s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:57:19,943 WARN L222 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:57:28,875 WARN L222 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:57:36,907 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:58:24,179 INFO L130 PetriNetUnfolder]: 25484/40338 cut-off events. [2023-09-01 03:58:24,179 INFO L131 PetriNetUnfolder]: For 35168/35168 co-relation queries the response was YES. [2023-09-01 03:58:24,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119042 conditions, 40338 events. 25484/40338 cut-off events. For 35168/35168 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 290267 event pairs, 12792 based on Foata normal form. 24/33030 useless extension candidates. Maximal degree in co-relation 118972. Up to 16849 conditions per place. [2023-09-01 03:58:24,640 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 682 selfloop transitions, 131 changer transitions 0/816 dead transitions. [2023-09-01 03:58:24,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 816 transitions, 6897 flow [2023-09-01 03:58:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 03:58:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 03:58:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 8788 transitions. [2023-09-01 03:58:24,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40061998541210797 [2023-09-01 03:58:24,649 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 8788 transitions. [2023-09-01 03:58:24,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 8788 transitions. [2023-09-01 03:58:24,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:24,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 8788 transitions. [2023-09-01 03:58:24,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 183.08333333333334) internal successors, (8788), 48 states have internal predecessors, (8788), 0 states have call successors, (0), 0 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 03:58:24,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 457.0) internal successors, (22393), 49 states have internal predecessors, (22393), 0 states have call successors, (0), 0 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 03:58:24,677 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 457.0) internal successors, (22393), 49 states have internal predecessors, (22393), 0 states have call successors, (0), 0 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 03:58:24,677 INFO L175 Difference]: Start difference. First operand has 155 places, 136 transitions, 1446 flow. Second operand 48 states and 8788 transitions. [2023-09-01 03:58:24,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 816 transitions, 6897 flow [2023-09-01 03:58:24,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 816 transitions, 6718 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-09-01 03:58:24,740 INFO L231 Difference]: Finished difference. Result has 225 places, 187 transitions, 2375 flow [2023-09-01 03:58:24,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2375, PETRI_PLACES=225, PETRI_TRANSITIONS=187} [2023-09-01 03:58:24,741 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 166 predicate places. [2023-09-01 03:58:24,741 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 187 transitions, 2375 flow [2023-09-01 03:58:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 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 03:58:24,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:24,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:24,763 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 03:58:24,955 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 03:58:24,955 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:58:24,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1564745327, now seen corresponding path program 1 times [2023-09-01 03:58:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791902632] [2023-09-01 03:58:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:58:24,956 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 03:58:24,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:24,957 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:58:24,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 03:58:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:58:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 03:58:25,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:58:25,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:58:25,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:58:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791902632] [2023-09-01 03:58:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791902632] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:58:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:58:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:58:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536791995] [2023-09-01 03:58:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:58:25,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:58:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:58:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:58:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:58:25,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-09-01 03:58:25,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 187 transitions, 2375 flow. Second operand has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 03:58:25,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:58:25,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-09-01 03:58:25,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:58:33,029 INFO L130 PetriNetUnfolder]: 26966/43764 cut-off events. [2023-09-01 03:58:33,029 INFO L131 PetriNetUnfolder]: For 29104/29104 co-relation queries the response was YES. [2023-09-01 03:58:33,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127375 conditions, 43764 events. 26966/43764 cut-off events. For 29104/29104 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 332945 event pairs, 5148 based on Foata normal form. 1092/37212 useless extension candidates. Maximal degree in co-relation 127280. Up to 32449 conditions per place. [2023-09-01 03:58:33,807 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 197 selfloop transitions, 5 changer transitions 0/205 dead transitions. [2023-09-01 03:58:33,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 2832 flow [2023-09-01 03:58:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:58:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:58:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 759 transitions. [2023-09-01 03:58:33,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152078774617068 [2023-09-01 03:58:33,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 759 transitions. [2023-09-01 03:58:33,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 759 transitions. [2023-09-01 03:58:33,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:33,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 759 transitions. [2023-09-01 03:58:33,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 03:58:33,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:58:33,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:58:33,812 INFO L175 Difference]: Start difference. First operand has 225 places, 187 transitions, 2375 flow. Second operand 4 states and 759 transitions. [2023-09-01 03:58:33,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 2832 flow [2023-09-01 03:58:33,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 205 transitions, 2543 flow, removed 66 selfloop flow, removed 21 redundant places. [2023-09-01 03:58:33,859 INFO L231 Difference]: Finished difference. Result has 208 places, 189 transitions, 2113 flow [2023-09-01 03:58:33,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2113, PETRI_PLACES=208, PETRI_TRANSITIONS=189} [2023-09-01 03:58:33,860 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 149 predicate places. [2023-09-01 03:58:33,860 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 189 transitions, 2113 flow [2023-09-01 03:58:33,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 03:58:33,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:33,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:33,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:58:34,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:34,065 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:58:34,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 771711053, now seen corresponding path program 2 times [2023-09-01 03:58:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:34,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460227488] [2023-09-01 03:58:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:58:34,066 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 03:58:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:34,068 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:58:34,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 03:58:34,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:58:34,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:58:34,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:58:34,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:34,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 03:58:34,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:58:34,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:58:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:58:34,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:58:34,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:58:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460227488] [2023-09-01 03:58:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460227488] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:58:34,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:58:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 03:58:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750376167] [2023-09-01 03:58:34,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:58:34,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 03:58:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:58:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 03:58:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-09-01 03:58:35,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 457 [2023-09-01 03:58:35,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 189 transitions, 2113 flow. Second operand has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 03:58:35,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:58:35,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 457 [2023-09-01 03:58:35,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:58:44,948 INFO L130 PetriNetUnfolder]: 27210/44643 cut-off events. [2023-09-01 03:58:44,948 INFO L131 PetriNetUnfolder]: For 53774/53774 co-relation queries the response was YES. [2023-09-01 03:58:45,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143022 conditions, 44643 events. 27210/44643 cut-off events. For 53774/53774 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 345076 event pairs, 5250 based on Foata normal form. 1050/39318 useless extension candidates. Maximal degree in co-relation 142925. Up to 32026 conditions per place. [2023-09-01 03:58:45,733 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 198 selfloop transitions, 5 changer transitions 0/206 dead transitions. [2023-09-01 03:58:45,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 206 transitions, 2574 flow [2023-09-01 03:58:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:58:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:58:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 731 transitions. [2023-09-01 03:58:45,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399890590809628 [2023-09-01 03:58:45,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 731 transitions. [2023-09-01 03:58:45,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 731 transitions. [2023-09-01 03:58:45,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:45,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 731 transitions. [2023-09-01 03:58:45,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 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 03:58:45,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:58:45,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 03:58:45,740 INFO L175 Difference]: Start difference. First operand has 208 places, 189 transitions, 2113 flow. Second operand 4 states and 731 transitions. [2023-09-01 03:58:45,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 206 transitions, 2574 flow [2023-09-01 03:58:45,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 206 transitions, 2565 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:58:45,801 INFO L231 Difference]: Finished difference. Result has 210 places, 190 transitions, 2129 flow [2023-09-01 03:58:45,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2129, PETRI_PLACES=210, PETRI_TRANSITIONS=190} [2023-09-01 03:58:45,802 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 151 predicate places. [2023-09-01 03:58:45,802 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 190 transitions, 2129 flow [2023-09-01 03:58:45,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 03:58:45,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:45,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:45,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:58:46,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:46,003 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:58:46,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:46,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1284076598, now seen corresponding path program 1 times [2023-09-01 03:58:46,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:46,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183538014] [2023-09-01 03:58:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:58:46,004 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 03:58:46,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:46,005 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:58:46,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 03:58:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:58:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:58:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:58:46,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:58:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:58:46,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:58:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183538014] [2023-09-01 03:58:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183538014] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:58:46,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:58:46,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 03:58:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675294920] [2023-09-01 03:58:46,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:58:46,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:58:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:58:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:58:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:58:47,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 457 [2023-09-01 03:58:47,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 190 transitions, 2129 flow. Second operand has 10 states, 10 states have (on average 176.4) internal successors, (1764), 10 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 03:58:47,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:58:47,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 457 [2023-09-01 03:58:47,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:58:55,646 INFO L130 PetriNetUnfolder]: 22910/38493 cut-off events. [2023-09-01 03:58:55,647 INFO L131 PetriNetUnfolder]: For 65399/65399 co-relation queries the response was YES. [2023-09-01 03:58:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132748 conditions, 38493 events. 22910/38493 cut-off events. For 65399/65399 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 299999 event pairs, 11250 based on Foata normal form. 1175/34718 useless extension candidates. Maximal degree in co-relation 132650. Up to 28756 conditions per place. [2023-09-01 03:58:56,349 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 240 selfloop transitions, 27 changer transitions 20/290 dead transitions. [2023-09-01 03:58:56,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 290 transitions, 3538 flow [2023-09-01 03:58:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:58:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:58:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1625 transitions. [2023-09-01 03:58:56,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950887430099684 [2023-09-01 03:58:56,352 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1625 transitions. [2023-09-01 03:58:56,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1625 transitions. [2023-09-01 03:58:56,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:56,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1625 transitions. [2023-09-01 03:58:56,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.55555555555554) internal successors, (1625), 9 states have internal predecessors, (1625), 0 states have call successors, (0), 0 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 03:58:56,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 03:58:56,358 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 03:58:56,358 INFO L175 Difference]: Start difference. First operand has 210 places, 190 transitions, 2129 flow. Second operand 9 states and 1625 transitions. [2023-09-01 03:58:56,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 290 transitions, 3538 flow [2023-09-01 03:58:56,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 290 transitions, 3522 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 03:58:56,449 INFO L231 Difference]: Finished difference. Result has 219 places, 192 transitions, 2281 flow [2023-09-01 03:58:56,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2281, PETRI_PLACES=219, PETRI_TRANSITIONS=192} [2023-09-01 03:58:56,450 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 160 predicate places. [2023-09-01 03:58:56,450 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 192 transitions, 2281 flow [2023-09-01 03:58:56,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.4) internal successors, (1764), 10 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 03:58:56,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:56,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:56,458 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 (28)] Forceful destruction successful, exit code 0 [2023-09-01 03:58:56,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /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 03:58:56,653 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:58:56,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash 391159394, now seen corresponding path program 2 times [2023-09-01 03:58:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:56,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851684637] [2023-09-01 03:58:56,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:58:56,654 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 03:58:56,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:56,655 INFO L229 MonitoredProcess]: Starting monitored process 29 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 03:58:56,658 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 (29)] Waiting until timeout for monitored process [2023-09-01 03:58:56,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:58:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:58:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:58:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:57,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 03:58:57,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:58:57,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:58:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:58:57,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:58:57,485 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1121 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1121) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-09-01 03:58:57,917 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:58:57,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 279 treesize of output 257 [2023-09-01 03:58:57,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 97 [2023-09-01 03:58:58,144 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:58:58,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 155 treesize of output 149 [2023-09-01 03:58:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:58:59,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:58:59,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851684637] [2023-09-01 03:58:59,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851684637] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:58:59,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:58:59,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-09-01 03:58:59,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82678711] [2023-09-01 03:58:59,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:58:59,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 03:58:59,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:58:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 03:58:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2023-09-01 03:58:59,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 457 [2023-09-01 03:58:59,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 192 transitions, 2281 flow. Second operand has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 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 03:58:59,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:58:59,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 457 [2023-09-01 03:58:59,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:59:09,645 INFO L130 PetriNetUnfolder]: 27507/44700 cut-off events. [2023-09-01 03:59:09,645 INFO L131 PetriNetUnfolder]: For 74124/74124 co-relation queries the response was YES. [2023-09-01 03:59:10,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154392 conditions, 44700 events. 27507/44700 cut-off events. For 74124/74124 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 339272 event pairs, 3075 based on Foata normal form. 500/39550 useless extension candidates. Maximal degree in co-relation 154291. Up to 27076 conditions per place. [2023-09-01 03:59:10,524 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 172 selfloop transitions, 57 changer transitions 2/233 dead transitions. [2023-09-01 03:59:10,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 233 transitions, 2919 flow [2023-09-01 03:59:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:59:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:59:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1125 transitions. [2023-09-01 03:59:10,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35167239762425756 [2023-09-01 03:59:10,527 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1125 transitions. [2023-09-01 03:59:10,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1125 transitions. [2023-09-01 03:59:10,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:59:10,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1125 transitions. [2023-09-01 03:59:10,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.71428571428572) internal successors, (1125), 7 states have internal predecessors, (1125), 0 states have call successors, (0), 0 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 03:59:10,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 03:59:10,531 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 03:59:10,531 INFO L175 Difference]: Start difference. First operand has 219 places, 192 transitions, 2281 flow. Second operand 7 states and 1125 transitions. [2023-09-01 03:59:10,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 233 transitions, 2919 flow [2023-09-01 03:59:10,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 233 transitions, 2889 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-09-01 03:59:10,774 INFO L231 Difference]: Finished difference. Result has 224 places, 195 transitions, 2408 flow [2023-09-01 03:59:10,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2408, PETRI_PLACES=224, PETRI_TRANSITIONS=195} [2023-09-01 03:59:10,775 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 165 predicate places. [2023-09-01 03:59:10,775 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 195 transitions, 2408 flow [2023-09-01 03:59:10,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 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 03:59:10,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:59:10,776 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:59:10,787 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 (29)] Forceful destruction successful, exit code 0 [2023-09-01 03:59:10,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /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 03:59:10,982 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:59:10,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:59:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash 552670952, now seen corresponding path program 3 times [2023-09-01 03:59:10,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:59:10,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771425123] [2023-09-01 03:59:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:59:10,983 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 03:59:10,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:59:10,984 INFO L229 MonitoredProcess]: Starting monitored process 30 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 03:59:10,985 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 (30)] Waiting until timeout for monitored process [2023-09-01 03:59:11,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:59:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:59:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:59:11,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:59:11,265 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 18 treesize of output 16 [2023-09-01 03:59:11,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 03:59:11,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:59:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:59:11,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:59:11,696 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1175 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1175) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-09-01 03:59:12,101 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:59:12,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 475 treesize of output 418 [2023-09-01 03:59:12,302 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:59:12,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 209 treesize of output 203 [2023-09-01 03:59:12,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:59:12,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 70 [2023-09-01 03:59:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-09-01 03:59:13,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:59:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771425123] [2023-09-01 03:59:13,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771425123] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:59:13,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:59:13,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 03:59:13,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410699809] [2023-09-01 03:59:13,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:59:13,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:59:13,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:59:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:59:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2023-09-01 03:59:13,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 457 [2023-09-01 03:59:13,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 195 transitions, 2408 flow. Second operand has 14 states, 14 states have (on average 146.71428571428572) internal successors, (2054), 14 states have internal predecessors, (2054), 0 states have call successors, (0), 0 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 03:59:13,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:59:13,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 457 [2023-09-01 03:59:13,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:59:25,842 INFO L130 PetriNetUnfolder]: 36357/57850 cut-off events. [2023-09-01 03:59:25,842 INFO L131 PetriNetUnfolder]: For 116043/116043 co-relation queries the response was YES. [2023-09-01 03:59:26,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211715 conditions, 57850 events. 36357/57850 cut-off events. For 116043/116043 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 440244 event pairs, 3575 based on Foata normal form. 400/53200 useless extension candidates. Maximal degree in co-relation 211612. Up to 30301 conditions per place. [2023-09-01 03:59:27,131 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 175 selfloop transitions, 61 changer transitions 0/238 dead transitions. [2023-09-01 03:59:27,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 238 transitions, 3080 flow [2023-09-01 03:59:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:59:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:59:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2023-09-01 03:59:27,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363551109721788 [2023-09-01 03:59:27,134 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2023-09-01 03:59:27,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2023-09-01 03:59:27,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:59:27,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2023-09-01 03:59:27,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 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 03:59:27,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 03:59:27,138 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 03:59:27,138 INFO L175 Difference]: Start difference. First operand has 224 places, 195 transitions, 2408 flow. Second operand 7 states and 1076 transitions. [2023-09-01 03:59:27,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 238 transitions, 3080 flow [2023-09-01 03:59:28,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 238 transitions, 2958 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-09-01 03:59:28,239 INFO L231 Difference]: Finished difference. Result has 229 places, 202 transitions, 2495 flow [2023-09-01 03:59:28,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2495, PETRI_PLACES=229, PETRI_TRANSITIONS=202} [2023-09-01 03:59:28,240 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 170 predicate places. [2023-09-01 03:59:28,240 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 202 transitions, 2495 flow [2023-09-01 03:59:28,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 146.71428571428572) internal successors, (2054), 14 states have internal predecessors, (2054), 0 states have call successors, (0), 0 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 03:59:28,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:59:28,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:59:28,250 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 (30)] Forceful destruction successful, exit code 0 [2023-09-01 03:59:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /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 03:59:28,443 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:59:28,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:59:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash -530428964, now seen corresponding path program 4 times [2023-09-01 03:59:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:59:28,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309780210] [2023-09-01 03:59:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:59:28,444 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 03:59:28,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:59:28,445 INFO L229 MonitoredProcess]: Starting monitored process 31 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 03:59:28,445 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 (31)] Waiting until timeout for monitored process [2023-09-01 03:59:28,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:59:28,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:59:28,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:59:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:59:28,832 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 18 treesize of output 16 [2023-09-01 03:59:29,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 03:59:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:59:29,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:59:29,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:59:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 03:59:29,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:59:29,818 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1230) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-09-01 03:59:29,977 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1229 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1230) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-09-01 03:59:30,560 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:59:30,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 467 treesize of output 445 [2023-09-01 03:59:30,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 231 [2023-09-01 03:59:30,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 177 [2023-09-01 03:59:30,828 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:59:30,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 235 treesize of output 229 [2023-09-01 03:59:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-09-01 03:59:32,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:59:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309780210] [2023-09-01 03:59:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309780210] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:59:32,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:59:32,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-09-01 03:59:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234548068] [2023-09-01 03:59:32,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:59:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:59:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:59:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:59:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=145, Unknown=2, NotChecked=50, Total=240 [2023-09-01 03:59:32,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 457 [2023-09-01 03:59:32,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 202 transitions, 2495 flow. Second operand has 16 states, 16 states have (on average 139.4375) internal successors, (2231), 16 states have internal predecessors, (2231), 0 states have call successors, (0), 0 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 03:59:32,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:59:32,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 457 [2023-09-01 03:59:32,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:59:46,775 INFO L130 PetriNetUnfolder]: 40557/64450 cut-off events. [2023-09-01 03:59:46,776 INFO L131 PetriNetUnfolder]: For 180143/180143 co-relation queries the response was YES. [2023-09-01 03:59:48,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247318 conditions, 64450 events. 40557/64450 cut-off events. For 180143/180143 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 497689 event pairs, 3625 based on Foata normal form. 400/58850 useless extension candidates. Maximal degree in co-relation 247212. Up to 25801 conditions per place. [2023-09-01 03:59:48,305 INFO L137 encePairwiseOnDemand]: 446/457 looper letters, 178 selfloop transitions, 69 changer transitions 2/251 dead transitions. [2023-09-01 03:59:48,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 251 transitions, 3216 flow [2023-09-01 03:59:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:59:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:59:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1174 transitions. [2023-09-01 03:59:48,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211159737417943 [2023-09-01 03:59:48,310 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1174 transitions. [2023-09-01 03:59:48,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1174 transitions. [2023-09-01 03:59:48,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:59:48,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1174 transitions. [2023-09-01 03:59:48,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 146.75) internal successors, (1174), 8 states have internal predecessors, (1174), 0 states have call successors, (0), 0 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 03:59:48,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 03:59:48,316 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 03:59:48,316 INFO L175 Difference]: Start difference. First operand has 229 places, 202 transitions, 2495 flow. Second operand 8 states and 1174 transitions. [2023-09-01 03:59:48,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 251 transitions, 3216 flow [2023-09-01 03:59:49,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 251 transitions, 3118 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:59:49,338 INFO L231 Difference]: Finished difference. Result has 237 places, 210 transitions, 2630 flow [2023-09-01 03:59:49,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2630, PETRI_PLACES=237, PETRI_TRANSITIONS=210} [2023-09-01 03:59:49,338 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 178 predicate places. [2023-09-01 03:59:49,338 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 210 transitions, 2630 flow [2023-09-01 03:59:49,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 139.4375) internal successors, (2231), 16 states have internal predecessors, (2231), 0 states have call successors, (0), 0 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 03:59:49,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:59:49,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:59:49,348 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 (31)] Ended with exit code 0 [2023-09-01 03:59:49,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /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 03:59:49,540 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:59:49,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:59:49,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1699281233, now seen corresponding path program 1 times [2023-09-01 03:59:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:59:49,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511596066] [2023-09-01 03:59:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:59:49,541 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 03:59:49,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:59:49,542 INFO L229 MonitoredProcess]: Starting monitored process 32 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 03:59:49,543 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 (32)] Waiting until timeout for monitored process [2023-09-01 03:59:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:59:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:59:49,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:59:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:59:49,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:59:49,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:59:49,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511596066] [2023-09-01 03:59:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511596066] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:59:49,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:59:49,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:59:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700127708] [2023-09-01 03:59:49,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:59:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:59:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:59:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:59:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:59:50,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 457 [2023-09-01 03:59:50,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 210 transitions, 2630 flow. Second operand has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 03:59:50,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:59:50,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 457 [2023-09-01 03:59:50,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:00:03,845 INFO L130 PetriNetUnfolder]: 40482/65250 cut-off events. [2023-09-01 04:00:03,846 INFO L131 PetriNetUnfolder]: For 304243/304243 co-relation queries the response was YES. [2023-09-01 04:00:05,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287672 conditions, 65250 events. 40482/65250 cut-off events. For 304243/304243 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 510132 event pairs, 13425 based on Foata normal form. 450/65700 useless extension candidates. Maximal degree in co-relation 287562. Up to 51176 conditions per place. [2023-09-01 04:00:05,527 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 221 selfloop transitions, 7 changer transitions 5/235 dead transitions. [2023-09-01 04:00:05,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 235 transitions, 3218 flow [2023-09-01 04:00:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:00:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:00:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 929 transitions. [2023-09-01 04:00:05,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40656455142231945 [2023-09-01 04:00:05,530 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 929 transitions. [2023-09-01 04:00:05,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 929 transitions. [2023-09-01 04:00:05,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:00:05,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 929 transitions. [2023-09-01 04:00:05,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 04:00:05,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 04:00:05,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 04:00:05,533 INFO L175 Difference]: Start difference. First operand has 237 places, 210 transitions, 2630 flow. Second operand 5 states and 929 transitions. [2023-09-01 04:00:05,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 235 transitions, 3218 flow [2023-09-01 04:00:09,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 235 transitions, 3089 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-09-01 04:00:09,989 INFO L231 Difference]: Finished difference. Result has 237 places, 212 transitions, 2548 flow [2023-09-01 04:00:09,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2548, PETRI_PLACES=237, PETRI_TRANSITIONS=212} [2023-09-01 04:00:09,989 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 178 predicate places. [2023-09-01 04:00:09,989 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 212 transitions, 2548 flow [2023-09-01 04:00:09,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 04:00:09,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:00:09,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:00:09,998 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 (32)] Forceful destruction successful, exit code 0 [2023-09-01 04:00:10,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /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 04:00:10,193 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 04:00:10,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:00:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash -173216341, now seen corresponding path program 2 times [2023-09-01 04:00:10,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:00:10,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019463979] [2023-09-01 04:00:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:00:10,194 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 04:00:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:00:10,195 INFO L229 MonitoredProcess]: Starting monitored process 33 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 04:00:10,196 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 (33)] Waiting until timeout for monitored process [2023-09-01 04:00:10,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:00:10,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:00:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 04:00:10,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:00:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:00:10,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:00:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:00:11,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:00:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019463979] [2023-09-01 04:00:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019463979] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:00:11,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:00:11,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2023-09-01 04:00:11,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330363652] [2023-09-01 04:00:11,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:00:11,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:00:11,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:00:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:00:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:00:11,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 457 [2023-09-01 04:00:11,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 212 transitions, 2548 flow. Second operand has 10 states, 10 states have (on average 187.4) internal successors, (1874), 10 states have internal predecessors, (1874), 0 states have call successors, (0), 0 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 04:00:11,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:00:11,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 457 [2023-09-01 04:00:11,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand