./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:10:44,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:10:44,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:10:44,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:10:44,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:10:44,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:10:44,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:10:44,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:10:44,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:10:44,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:10:44,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:10:44,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:10:44,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:10:44,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:10:44,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:10:44,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:10:44,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:10:44,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:10:44,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:10:44,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:10:44,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:10:44,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:10:44,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:10:44,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:10:44,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:10:44,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:10:44,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:10:44,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:10:44,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:10:44,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:10:44,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:10:44,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:10:44,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:10:44,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:10:44,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:10:44,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:10:44,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:10:44,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:10:44,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:10:44,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:10:44,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:10:44,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:10:44,530 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:10:44,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:10:44,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:10:44,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:10:44,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:10:44,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:10:44,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:10:44,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:10:44,534 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:10:44,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:10:44,535 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:10:44,535 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:10:44,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:10:44,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:10:44,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:10:44,536 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:10:44,536 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:10:44,536 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:10:44,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:10:44,537 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:10:44,537 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:10:44,537 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:10:44,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:10:44,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:10:44,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:10:44,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:44,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:10:44,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:10:44,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:10:44,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:10:44,539 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:10:44,539 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:10:44,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:10:44,540 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:10:44,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:10:44,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:10:44,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:10:44,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:10:44,904 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:10:44,905 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:10:44,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-30 06:10:46,127 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:10:46,312 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:10:46,312 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-30 06:10:46,327 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/651f7303d/7b4acba1b9f6421b906f018a688f9e45/FLAG67c3767b9 [2023-08-30 06:10:46,345 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/651f7303d/7b4acba1b9f6421b906f018a688f9e45 [2023-08-30 06:10:46,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:10:46,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:10:46,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:46,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:10:46,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:10:46,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:46" (1/1) ... [2023-08-30 06:10:46,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf53cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:46, skipping insertion in model container [2023-08-30 06:10:46,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:46" (1/1) ... [2023-08-30 06:10:46,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:10:46,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:46,607 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-bad-dot-product.wvr.c[2865,2878] [2023-08-30 06:10:46,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:46,634 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:10:46,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16e4186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:46, skipping insertion in model container [2023-08-30 06:10:46,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:46,637 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:10:46,639 INFO L158 Benchmark]: Toolchain (without parser) took 288.65ms. Allocated memory is still 69.2MB. Free memory was 38.1MB in the beginning and 43.8MB in the end (delta: -5.7MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2023-08-30 06:10:46,640 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 54.5MB. Free memory is still 32.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:10:46,640 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.45ms. Allocated memory is still 69.2MB. Free memory was 37.8MB in the beginning and 44.1MB in the end (delta: -6.3MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2023-08-30 06:10:46,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 54.5MB. Free memory is still 32.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.45ms. Allocated memory is still 69.2MB. Free memory was 37.8MB in the beginning and 44.1MB in the end (delta: -6.3MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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-bad-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:10:48,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:10:48,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:10:48,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:10:48,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:10:48,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:10:48,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:10:48,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:10:48,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:10:48,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:10:48,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:10:48,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:10:48,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:10:48,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:10:48,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:10:48,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:10:48,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:10:48,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:10:48,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:10:48,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:10:48,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:10:48,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:10:48,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:10:48,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:10:48,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:10:48,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:10:48,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:10:48,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:10:48,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:10:48,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:10:48,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:10:48,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:10:48,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:10:48,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:10:48,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:10:48,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:10:48,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:10:48,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:10:48,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:10:48,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:10:48,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:10:48,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:10:48,564 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:10:48,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:10:48,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:10:48,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:10:48,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:10:48,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:10:48,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:10:48,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:10:48,568 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:10:48,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:10:48,570 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:10:48,570 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:10:48,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:10:48,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:10:48,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:10:48,571 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:10:48,571 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:10:48,571 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:10:48,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:10:48,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:10:48,573 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:10:48,577 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:10:48,577 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:10:48,577 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:10:48,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:10:48,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:10:48,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:10:48,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:48,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:10:48,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:10:48,579 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:10:48,579 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:10:48,579 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:10:48,580 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:10:48,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:10:48,580 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:10:48,580 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:10:48,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:10:48,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:10:48,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:10:48,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:10:48,924 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:10:48,925 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:10:48,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-30 06:10:50,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:10:50,451 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:10:50,452 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-30 06:10:50,461 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a76e2802/c8c7d6a25fc1466f915bd48b84d45aa8/FLAGca1093bcf [2023-08-30 06:10:50,478 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a76e2802/c8c7d6a25fc1466f915bd48b84d45aa8 [2023-08-30 06:10:50,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:10:50,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:10:50,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:50,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:10:50,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:10:50,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3be651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50, skipping insertion in model container [2023-08-30 06:10:50,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:10:50,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:50,714 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-bad-dot-product.wvr.c[2865,2878] [2023-08-30 06:10:50,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:50,753 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:10:50,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:50,793 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-bad-dot-product.wvr.c[2865,2878] [2023-08-30 06:10:50,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:50,805 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:10:50,845 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-bad-dot-product.wvr.c[2865,2878] [2023-08-30 06:10:50,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:50,864 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:50,865 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:50,871 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:10:50,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50 WrapperNode [2023-08-30 06:10:50,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:50,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:50,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:10:50,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:10:50,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,949 INFO L138 Inliner]: procedures = 28, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 272 [2023-08-30 06:10:50,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:50,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:10:50,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:10:50,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:10:50,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:51,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:51,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:51,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:51,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:51,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:10:51,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:10:51,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:10:51,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:10:51,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:51,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:10:51,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:10:51,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:10:51,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:10:51,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:10:51,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:10:51,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:10:51,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:10:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:10:51,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:10:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:10:51,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:10:51,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:10:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:10:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:10:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:10:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:10:51,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:10:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:10:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:10:51,119 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:10:51,295 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:10:51,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:10:51,914 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:10:52,066 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:10:52,066 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-30 06:10:52,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:52 BoogieIcfgContainer [2023-08-30 06:10:52,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:10:52,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:10:52,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:10:52,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:10:52,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:10:50" (1/3) ... [2023-08-30 06:10:52,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e98307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:52, skipping insertion in model container [2023-08-30 06:10:52,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50" (2/3) ... [2023-08-30 06:10:52,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e98307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:52, skipping insertion in model container [2023-08-30 06:10:52,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:52" (3/3) ... [2023-08-30 06:10:52,075 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-08-30 06:10:52,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:10:52,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-30 06:10:52,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:10:52,244 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:10:52,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 272 transitions, 568 flow [2023-08-30 06:10:52,407 INFO L130 PetriNetUnfolder]: 25/269 cut-off events. [2023-08-30 06:10:52,407 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:52,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 269 events. 25/269 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 501 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-30 06:10:52,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 272 transitions, 568 flow [2023-08-30 06:10:52,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 265 transitions, 548 flow [2023-08-30 06:10:52,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:10:52,443 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 265 transitions, 548 flow [2023-08-30 06:10:52,447 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 265 transitions, 548 flow [2023-08-30 06:10:52,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 265 transitions, 548 flow [2023-08-30 06:10:52,504 INFO L130 PetriNetUnfolder]: 25/265 cut-off events. [2023-08-30 06:10:52,505 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:52,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 265 events. 25/265 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 499 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-30 06:10:52,516 INFO L119 LiptonReduction]: Number of co-enabled transitions 10608 [2023-08-30 06:11:17,838 INFO L134 LiptonReduction]: Checked pairs total: 13739 [2023-08-30 06:11:17,838 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-08-30 06:11:17,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:11:17,865 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;@1a5618fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:11:17,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-08-30 06:11:17,868 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:11:17,868 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:11:17,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:17,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:17,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:11:17,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash 39463, now seen corresponding path program 1 times [2023-08-30 06:11:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558866048] [2023-08-30 06:11:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:17,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:17,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:17,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:11:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:11:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:18,194 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:11:18,195 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 [2023-08-30 06:11:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:18,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:18,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:18,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558866048] [2023-08-30 06:11:18,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558866048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:18,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:18,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220258823] [2023-08-30 06:11:18,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:18,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:18,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-30 06:11:18,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:18,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:18,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-30 06:11:18,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:20,513 INFO L130 PetriNetUnfolder]: 12164/15547 cut-off events. [2023-08-30 06:11:20,514 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2023-08-30 06:11:20,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31209 conditions, 15547 events. 12164/15547 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 1298. Compared 78142 event pairs, 7100 based on Foata normal form. 0/4608 useless extension candidates. Maximal degree in co-relation 28665. Up to 15394 conditions per place. [2023-08-30 06:11:20,623 INFO L137 encePairwiseOnDemand]: 558/562 looper letters, 56 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-08-30 06:11:20,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 264 flow [2023-08-30 06:11:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2023-08-30 06:11:20,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45195729537366547 [2023-08-30 06:11:20,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2023-08-30 06:11:20,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2023-08-30 06:11:20,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:20,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2023-08-30 06:11:20,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,661 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 156 flow. Second operand 3 states and 762 transitions. [2023-08-30 06:11:20,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 264 flow [2023-08-30 06:11:20,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 252 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:11:20,682 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 140 flow [2023-08-30 06:11:20,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-30 06:11:20,694 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-30 06:11:20,695 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 140 flow [2023-08-30 06:11:20,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:20,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:20,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:20,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:20,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:11:20,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash 39464, now seen corresponding path program 1 times [2023-08-30 06:11:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273073081] [2023-08-30 06:11:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:20,908 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 [2023-08-30 06:11:20,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:20,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:20,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:11:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:20,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:11:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:21,105 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:21,106 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 [2023-08-30 06:11:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:21,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:21,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:21,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273073081] [2023-08-30 06:11:21,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273073081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:21,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:21,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837961426] [2023-08-30 06:11:21,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:21,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:21,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:21,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-30 06:11:21,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:21,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:21,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-30 06:11:21,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:24,466 INFO L130 PetriNetUnfolder]: 24327/31091 cut-off events. [2023-08-30 06:11:24,467 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 06:11:24,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62062 conditions, 31091 events. 24327/31091 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 2557. Compared 168789 event pairs, 14200 based on Foata normal form. 0/9389 useless extension candidates. Maximal degree in co-relation 62056. Up to 15395 conditions per place. [2023-08-30 06:11:24,667 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 107 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2023-08-30 06:11:24,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 120 transitions, 476 flow [2023-08-30 06:11:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 815 transitions. [2023-08-30 06:11:24,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4833926453143535 [2023-08-30 06:11:24,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 815 transitions. [2023-08-30 06:11:24,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 815 transitions. [2023-08-30 06:11:24,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:24,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 815 transitions. [2023-08-30 06:11:24,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,681 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 140 flow. Second operand 3 states and 815 transitions. [2023-08-30 06:11:24,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 120 transitions, 476 flow [2023-08-30 06:11:24,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 120 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:24,685 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 171 flow [2023-08-30 06:11:24,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-08-30 06:11:24,686 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-08-30 06:11:24,687 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 171 flow [2023-08-30 06:11:24,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:24,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:11:24,705 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 [2023-08-30 06:11:24,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:24,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:11:24,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:24,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1227215, now seen corresponding path program 1 times [2023-08-30 06:11:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:24,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147125589] [2023-08-30 06:11:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:24,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:24,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:24,906 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:24,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:11:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:11:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:25,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:25,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147125589] [2023-08-30 06:11:25,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147125589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:25,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:25,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:11:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144958099] [2023-08-30 06:11:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:25,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:11:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:11:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:11:25,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-30 06:11:25,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:25,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:25,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-30 06:11:25,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:27,922 INFO L130 PetriNetUnfolder]: 24327/31094 cut-off events. [2023-08-30 06:11:27,922 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 06:11:27,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62086 conditions, 31094 events. 24327/31094 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 2596. Compared 170101 event pairs, 14200 based on Foata normal form. 2/9223 useless extension candidates. Maximal degree in co-relation 62077. Up to 30784 conditions per place. [2023-08-30 06:11:28,081 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 60 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-30 06:11:28,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 311 flow [2023-08-30 06:11:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:11:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:11:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1004 transitions. [2023-08-30 06:11:28,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661921708185054 [2023-08-30 06:11:28,085 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1004 transitions. [2023-08-30 06:11:28,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1004 transitions. [2023-08-30 06:11:28,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:28,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1004 transitions. [2023-08-30 06:11:28,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:28,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:28,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:28,094 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 171 flow. Second operand 4 states and 1004 transitions. [2023-08-30 06:11:28,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 311 flow [2023-08-30 06:11:28,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:11:28,101 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 176 flow [2023-08-30 06:11:28,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-30 06:11:28,102 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-30 06:11:28,102 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 176 flow [2023-08-30 06:11:28,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:28,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:28,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:11:28,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:28,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:11:28,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1225555, now seen corresponding path program 1 times [2023-08-30 06:11:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052448966] [2023-08-30 06:11:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:28,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:28,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:28,308 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 (5)] Waiting until timeout for monitored process [2023-08-30 06:11:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:28,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:11:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:28,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:28,493 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 [2023-08-30 06:11:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:28,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:11:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:28,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052448966] [2023-08-30 06:11:28,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052448966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:11:28,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:11:28,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:11:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469094377] [2023-08-30 06:11:28,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:11:28,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:11:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:11:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:11:29,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 562 [2023-08-30 06:11:29,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:29,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:29,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 562 [2023-08-30 06:11:29,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:31,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:11:34,937 INFO L130 PetriNetUnfolder]: 36498/46653 cut-off events. [2023-08-30 06:11:34,937 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 06:11:34,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93168 conditions, 46653 events. 36498/46653 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 3819. Compared 266354 event pairs, 21300 based on Foata normal form. 0/14185 useless extension candidates. Maximal degree in co-relation 93158. Up to 15397 conditions per place. [2023-08-30 06:11:35,162 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 158 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2023-08-30 06:11:35,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 186 transitions, 818 flow [2023-08-30 06:11:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:11:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:11:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1527 transitions. [2023-08-30 06:11:35,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452846975088968 [2023-08-30 06:11:35,167 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1527 transitions. [2023-08-30 06:11:35,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1527 transitions. [2023-08-30 06:11:35,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:35,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1527 transitions. [2023-08-30 06:11:35,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 254.5) internal successors, (1527), 6 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:35,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:35,179 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:35,179 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 176 flow. Second operand 6 states and 1527 transitions. [2023-08-30 06:11:35,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 186 transitions, 818 flow [2023-08-30 06:11:35,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 186 transitions, 812 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:35,184 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 327 flow [2023-08-30 06:11:35,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2023-08-30 06:11:35,186 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2023-08-30 06:11:35,186 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 327 flow [2023-08-30 06:11:35,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:35,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:35,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:11:35,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:35,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:35,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:11:35,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash 37996036, now seen corresponding path program 1 times [2023-08-30 06:11:35,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:35,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979784834] [2023-08-30 06:11:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:35,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:35,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:35,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:35,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:11:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:35,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:11:35,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:35,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:35,595 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:11:35,596 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 [2023-08-30 06:11:35,626 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:11:35,626 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 [2023-08-30 06:11:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:35,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:11:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:11:35,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:35,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:35,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979784834] [2023-08-30 06:11:35,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979784834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:35,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:35,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:11:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102494542] [2023-08-30 06:11:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:35,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:11:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:11:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:11:36,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 562 [2023-08-30 06:11:36,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:36,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:36,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 562 [2023-08-30 06:11:36,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:38,841 INFO L130 PetriNetUnfolder]: 28099/36307 cut-off events. [2023-08-30 06:11:38,841 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-08-30 06:11:38,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72534 conditions, 36307 events. 28099/36307 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 206708 event pairs, 16278 based on Foata normal form. 0/11521 useless extension candidates. Maximal degree in co-relation 72519. Up to 35848 conditions per place. [2023-08-30 06:11:39,034 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 70 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-30 06:11:39,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 443 flow [2023-08-30 06:11:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2023-08-30 06:11:39,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45729537366548045 [2023-08-30 06:11:39,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2023-08-30 06:11:39,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2023-08-30 06:11:39,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:39,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2023-08-30 06:11:39,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:39,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:39,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:39,049 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 327 flow. Second operand 3 states and 771 transitions. [2023-08-30 06:11:39,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 443 flow [2023-08-30 06:11:39,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 424 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:39,055 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 284 flow [2023-08-30 06:11:39,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2023-08-30 06:11:39,059 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-30 06:11:39,059 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 284 flow [2023-08-30 06:11:39,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:39,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:39,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:11:39,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:39,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:39,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:11:39,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash 37996037, now seen corresponding path program 1 times [2023-08-30 06:11:39,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:39,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137295578] [2023-08-30 06:11:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:39,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:39,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:39,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:11:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:11:39,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:39,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:39,454 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:11:39,455 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 [2023-08-30 06:11:39,844 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 06:11:39,845 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 [2023-08-30 06:11:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:11:39,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:39,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137295578] [2023-08-30 06:11:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137295578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:39,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:39,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:39,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048897973] [2023-08-30 06:11:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:39,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:39,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:40,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-30 06:11:40,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:40,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:40,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-30 06:11:40,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:42,464 INFO L130 PetriNetUnfolder]: 19700/25961 cut-off events. [2023-08-30 06:11:42,464 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-30 06:11:42,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51815 conditions, 25961 events. 19700/25961 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 148946 event pairs, 11256 based on Foata normal form. 0/9199 useless extension candidates. Maximal degree in co-relation 51799. Up to 25502 conditions per place. [2023-08-30 06:11:42,601 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 66 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 06:11:42,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 392 flow [2023-08-30 06:11:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-08-30 06:11:42,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543297746144721 [2023-08-30 06:11:42,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-08-30 06:11:42,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-08-30 06:11:42,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:42,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-08-30 06:11:42,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:42,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:42,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:42,610 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 284 flow. Second operand 3 states and 766 transitions. [2023-08-30 06:11:42,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 392 flow [2023-08-30 06:11:42,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:42,612 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 259 flow [2023-08-30 06:11:42,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-30 06:11:42,613 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-30 06:11:42,613 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 259 flow [2023-08-30 06:11:42,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:42,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:42,614 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:11:42,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:42,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:42,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:11:42,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2142040856, now seen corresponding path program 2 times [2023-08-30 06:11:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:42,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772835567] [2023-08-30 06:11:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:11:42,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:42,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:42,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:11:42,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:11:42,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:11:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:11:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:42,997 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:42,997 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 [2023-08-30 06:11:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:43,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:11:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:43,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772835567] [2023-08-30 06:11:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772835567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:11:43,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:11:43,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:11:43,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033129029] [2023-08-30 06:11:43,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:11:43,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:11:43,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:11:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:11:48,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 562 [2023-08-30 06:11:48,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 259 flow. Second operand has 12 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:48,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:48,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 562 [2023-08-30 06:11:48,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:50,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:11:52,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:11:54,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:11:56,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:11:58,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:00,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:01,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:03,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:14,783 INFO L130 PetriNetUnfolder]: 65653/86505 cut-off events. [2023-08-30 06:12:14,783 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2023-08-30 06:12:14,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172560 conditions, 86505 events. 65653/86505 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 4030. Compared 548924 event pairs, 37520 based on Foata normal form. 12/31396 useless extension candidates. Maximal degree in co-relation 172543. Up to 8504 conditions per place. [2023-08-30 06:12:15,331 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 475 selfloop transitions, 35 changer transitions 0/519 dead transitions. [2023-08-30 06:12:15,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 519 transitions, 2363 flow [2023-08-30 06:12:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 06:12:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 06:12:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4135 transitions. [2023-08-30 06:12:15,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45985320284697506 [2023-08-30 06:12:15,343 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4135 transitions. [2023-08-30 06:12:15,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4135 transitions. [2023-08-30 06:12:15,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:15,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4135 transitions. [2023-08-30 06:12:15,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 258.4375) internal successors, (4135), 16 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:15,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:15,366 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:15,366 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 259 flow. Second operand 16 states and 4135 transitions. [2023-08-30 06:12:15,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 519 transitions, 2363 flow [2023-08-30 06:12:15,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 519 transitions, 2362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:15,373 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 539 flow [2023-08-30 06:12:15,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=539, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2023-08-30 06:12:15,375 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 24 predicate places. [2023-08-30 06:12:15,375 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 539 flow [2023-08-30 06:12:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:15,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:15,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:12:15,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:15,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:15,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:12:15,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2140486640, now seen corresponding path program 1 times [2023-08-30 06:12:15,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:15,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14687579] [2023-08-30 06:12:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:15,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:15,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:15,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:12:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:12:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:15,746 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 06:12:15,746 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 [2023-08-30 06:12:16,042 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:12:16,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:12:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:12:16,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:16,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:16,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14687579] [2023-08-30 06:12:16,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14687579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:16,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:16,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:12:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874241615] [2023-08-30 06:12:16,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:16,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:12:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:12:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:12:16,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-30 06:12:16,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 539 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 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) [2023-08-30 06:12:16,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:16,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-30 06:12:16,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:23,090 INFO L130 PetriNetUnfolder]: 63413/83455 cut-off events. [2023-08-30 06:12:23,090 INFO L131 PetriNetUnfolder]: For 428/428 co-relation queries the response was YES. [2023-08-30 06:12:23,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166565 conditions, 83455 events. 63413/83455 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 3528. Compared 524127 event pairs, 36180 based on Foata normal form. 0/30013 useless extension candidates. Maximal degree in co-relation 166541. Up to 81925 conditions per place. [2023-08-30 06:12:23,550 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 88 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2023-08-30 06:12:23,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 713 flow [2023-08-30 06:12:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:12:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:12:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-08-30 06:12:23,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-08-30 06:12:23,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-08-30 06:12:23,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-08-30 06:12:23,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:23,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-08-30 06:12:23,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:23,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:23,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:23,556 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 539 flow. Second operand 3 states and 764 transitions. [2023-08-30 06:12:23,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 713 flow [2023-08-30 06:12:23,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 98 transitions, 645 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 06:12:23,561 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 469 flow [2023-08-30 06:12:23,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=469, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2023-08-30 06:12:23,562 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-08-30 06:12:23,562 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 469 flow [2023-08-30 06:12:23,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 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) [2023-08-30 06:12:23,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:23,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:12:23,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:23,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:23,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:12:23,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2140486642, now seen corresponding path program 1 times [2023-08-30 06:12:23,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:23,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94662558] [2023-08-30 06:12:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:23,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:23,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:23,774 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:23,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:12:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:12:23,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:23,947 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 06:12:23,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 06:12:23,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:12:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:24,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:12:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:12:24,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:24,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:24,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94662558] [2023-08-30 06:12:24,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94662558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:24,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:24,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:12:24,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075174515] [2023-08-30 06:12:24,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:24,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:12:24,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:12:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:12:24,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 562 [2023-08-30 06:12:24,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:24,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:24,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 562 [2023-08-30 06:12:24,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:30,989 INFO L130 PetriNetUnfolder]: 61173/80405 cut-off events. [2023-08-30 06:12:30,989 INFO L131 PetriNetUnfolder]: For 464/464 co-relation queries the response was YES. [2023-08-30 06:12:31,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160416 conditions, 80405 events. 61173/80405 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 3669. Compared 503471 event pairs, 34840 based on Foata normal form. 0/29395 useless extension candidates. Maximal degree in co-relation 160391. Up to 78875 conditions per place. [2023-08-30 06:12:31,414 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 86 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-30 06:12:31,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 639 flow [2023-08-30 06:12:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:12:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:12:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-08-30 06:12:31,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45373665480427045 [2023-08-30 06:12:31,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-08-30 06:12:31,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-08-30 06:12:31,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:31,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-08-30 06:12:31,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:31,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:31,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:31,422 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 469 flow. Second operand 3 states and 765 transitions. [2023-08-30 06:12:31,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 639 flow [2023-08-30 06:12:31,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:31,426 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 466 flow [2023-08-30 06:12:31,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=466, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2023-08-30 06:12:31,427 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2023-08-30 06:12:31,427 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 466 flow [2023-08-30 06:12:31,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:31,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:31,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:31,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:31,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:31,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:12:31,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:31,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1930586001, now seen corresponding path program 1 times [2023-08-30 06:12:31,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:31,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425523489] [2023-08-30 06:12:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:31,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:31,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:31,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:31,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:12:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:12:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:31,789 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:12:31,789 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 [2023-08-30 06:12:31,824 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:12:31,825 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 [2023-08-30 06:12:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:12:31,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:31,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425523489] [2023-08-30 06:12:31,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425523489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:31,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:31,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:12:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950794583] [2023-08-30 06:12:31,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:12:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:12:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:12:32,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 06:12:32,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 466 flow. Second operand has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:32,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:32,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 06:12:32,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:37,035 INFO L130 PetriNetUnfolder]: 41523/55045 cut-off events. [2023-08-30 06:12:37,035 INFO L131 PetriNetUnfolder]: For 434/434 co-relation queries the response was YES. [2023-08-30 06:12:37,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110307 conditions, 55045 events. 41523/55045 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 2449. Compared 333526 event pairs, 24330 based on Foata normal form. 0/22885 useless extension candidates. Maximal degree in co-relation 110281. Up to 54292 conditions per place. [2023-08-30 06:12:37,357 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 72 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-30 06:12:37,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 90 transitions, 622 flow [2023-08-30 06:12:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:12:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:12:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 932 transitions. [2023-08-30 06:12:37,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41459074733096085 [2023-08-30 06:12:37,360 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 932 transitions. [2023-08-30 06:12:37,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 932 transitions. [2023-08-30 06:12:37,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:37,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 932 transitions. [2023-08-30 06:12:37,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,366 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,366 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 466 flow. Second operand 4 states and 932 transitions. [2023-08-30 06:12:37,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 90 transitions, 622 flow [2023-08-30 06:12:37,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 90 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:37,370 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 477 flow [2023-08-30 06:12:37,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=477, PETRI_PLACES=86, PETRI_TRANSITIONS=90} [2023-08-30 06:12:37,370 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 15 predicate places. [2023-08-30 06:12:37,371 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 477 flow [2023-08-30 06:12:37,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:37,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:37,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:37,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:37,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:12:37,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:37,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1930586000, now seen corresponding path program 1 times [2023-08-30 06:12:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:37,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505528637] [2023-08-30 06:12:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:37,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:37,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:37,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:37,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:12:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:12:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:37,943 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:12:37,943 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 [2023-08-30 06:12:38,047 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:12:38,047 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 [2023-08-30 06:12:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:38,171 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 [2023-08-30 06:12:38,180 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:12:38,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:12:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:38,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:12:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:38,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:38,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505528637] [2023-08-30 06:12:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505528637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:12:38,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:12:38,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:12:38,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505160769] [2023-08-30 06:12:38,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:12:38,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:12:38,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:38,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:12:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:12:41,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 562 [2023-08-30 06:12:41,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 477 flow. Second operand has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:41,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:41,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 562 [2023-08-30 06:12:41,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:10,816 INFO L130 PetriNetUnfolder]: 164525/219462 cut-off events. [2023-08-30 06:13:10,817 INFO L131 PetriNetUnfolder]: For 1375/1375 co-relation queries the response was YES. [2023-08-30 06:13:11,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440850 conditions, 219462 events. 164525/219462 cut-off events. For 1375/1375 co-relation queries the response was YES. Maximal size of possible extension queue 8297. Compared 1562117 event pairs, 43375 based on Foata normal form. 0/97922 useless extension candidates. Maximal degree in co-relation 440823. Up to 26052 conditions per place. [2023-08-30 06:13:12,190 INFO L137 encePairwiseOnDemand]: 550/562 looper letters, 934 selfloop transitions, 91 changer transitions 0/1029 dead transitions. [2023-08-30 06:13:12,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1029 transitions, 4819 flow [2023-08-30 06:13:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 06:13:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 06:13:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 8386 transitions. [2023-08-30 06:13:12,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42633451957295376 [2023-08-30 06:13:12,204 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 8386 transitions. [2023-08-30 06:13:12,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 8386 transitions. [2023-08-30 06:13:12,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:13:12,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 8386 transitions. [2023-08-30 06:13:12,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 239.6) internal successors, (8386), 35 states have internal predecessors, (8386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:12,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 562.0) internal successors, (20232), 36 states have internal predecessors, (20232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:12,251 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 562.0) internal successors, (20232), 36 states have internal predecessors, (20232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:12,251 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 477 flow. Second operand 35 states and 8386 transitions. [2023-08-30 06:13:12,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 1029 transitions, 4819 flow [2023-08-30 06:13:12,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 1029 transitions, 4806 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:13:12,267 INFO L231 Difference]: Finished difference. Result has 125 places, 160 transitions, 1024 flow [2023-08-30 06:13:12,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1024, PETRI_PLACES=125, PETRI_TRANSITIONS=160} [2023-08-30 06:13:12,268 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 54 predicate places. [2023-08-30 06:13:12,268 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 160 transitions, 1024 flow [2023-08-30 06:13:12,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:12,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:13:12,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:13:12,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:13:12,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:12,479 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:13:12,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:13:12,480 INFO L85 PathProgramCache]: Analyzing trace with hash 281702092, now seen corresponding path program 1 times [2023-08-30 06:13:12,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:13:12,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162197916] [2023-08-30 06:13:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:13:12,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:12,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:13:12,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:13:12,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:13:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:13:12,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:13:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:13:12,639 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:13:12,640 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 [2023-08-30 06:13:12,669 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:13:12,670 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 [2023-08-30 06:13:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:13:12,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:13:12,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:13:12,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162197916] [2023-08-30 06:13:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162197916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:13:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:13:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:13:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377743979] [2023-08-30 06:13:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:13:12,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:13:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:13:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:13:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:13:12,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-30 06:13:12,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 160 transitions, 1024 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 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) [2023-08-30 06:13:12,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:13:12,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-30 06:13:12,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:32,223 INFO L130 PetriNetUnfolder]: 149015/198163 cut-off events. [2023-08-30 06:13:32,223 INFO L131 PetriNetUnfolder]: For 195924/202474 co-relation queries the response was YES. [2023-08-30 06:13:32,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457552 conditions, 198163 events. 149015/198163 cut-off events. For 195924/202474 co-relation queries the response was YES. Maximal size of possible extension queue 7650. Compared 1399432 event pairs, 92272 based on Foata normal form. 5240/110235 useless extension candidates. Maximal degree in co-relation 457517. Up to 196381 conditions per place. [2023-08-30 06:13:33,604 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 141 selfloop transitions, 1 changer transitions 0/158 dead transitions. [2023-08-30 06:13:33,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 158 transitions, 1304 flow [2023-08-30 06:13:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:13:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:13:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-30 06:13:33,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454329774614472 [2023-08-30 06:13:33,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-30 06:13:33,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-30 06:13:33,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:13:33,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-30 06:13:33,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:33,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:33,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:33,609 INFO L175 Difference]: Start difference. First operand has 125 places, 160 transitions, 1024 flow. Second operand 3 states and 751 transitions. [2023-08-30 06:13:33,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 158 transitions, 1304 flow [2023-08-30 06:13:35,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 158 transitions, 1182 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 06:13:35,688 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 900 flow [2023-08-30 06:13:35,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=900, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2023-08-30 06:13:35,689 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 50 predicate places. [2023-08-30 06:13:35,689 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 900 flow [2023-08-30 06:13:35,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 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) [2023-08-30 06:13:35,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:13:35,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:13:35,699 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 [2023-08-30 06:13:35,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:35,896 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:13:35,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:13:35,897 INFO L85 PathProgramCache]: Analyzing trace with hash 281702090, now seen corresponding path program 1 times [2023-08-30 06:13:35,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:13:35,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799644090] [2023-08-30 06:13:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:13:35,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:13:35,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:13:35,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:13:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:13:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:13:36,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:13:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:13:36,086 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 06:13:36,086 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 [2023-08-30 06:13:36,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-08-30 06:13:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:13:36,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:13:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:13:36,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:13:36,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:13:36,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799644090] [2023-08-30 06:13:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799644090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:13:36,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:13:36,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:13:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213881977] [2023-08-30 06:13:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:13:36,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:13:36,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:13:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:13:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:13:36,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 562 [2023-08-30 06:13:36,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 900 flow. Second operand has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:36,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:13:36,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 562 [2023-08-30 06:13:36,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:55,113 INFO L130 PetriNetUnfolder]: 142385/188791 cut-off events. [2023-08-30 06:13:55,113 INFO L131 PetriNetUnfolder]: For 181962/188112 co-relation queries the response was YES. [2023-08-30 06:13:55,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435141 conditions, 188791 events. 142385/188791 cut-off events. For 181962/188112 co-relation queries the response was YES. Maximal size of possible extension queue 7388. Compared 1322202 event pairs, 87782 based on Foata normal form. 4920/106289 useless extension candidates. Maximal degree in co-relation 435107. Up to 186993 conditions per place. [2023-08-30 06:13:56,691 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 139 selfloop transitions, 1 changer transitions 0/156 dead transitions. [2023-08-30 06:13:56,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 156 transitions, 1176 flow [2023-08-30 06:13:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:13:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:13:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-30 06:13:56,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460260972716489 [2023-08-30 06:13:56,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-30 06:13:56,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-30 06:13:56,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:13:56,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-30 06:13:56,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:56,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:56,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:56,697 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 900 flow. Second operand 3 states and 752 transitions. [2023-08-30 06:13:56,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 156 transitions, 1176 flow [2023-08-30 06:13:58,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 156 transitions, 1175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:13:58,257 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 897 flow [2023-08-30 06:13:58,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=897, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2023-08-30 06:13:58,258 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 49 predicate places. [2023-08-30 06:13:58,258 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 897 flow [2023-08-30 06:13:58,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:58,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:13:58,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:13:58,265 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 (14)] Ended with exit code 0 [2023-08-30 06:13:58,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:58,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:13:58,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:13:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash 281383016, now seen corresponding path program 1 times [2023-08-30 06:13:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:13:58,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256780523] [2023-08-30 06:13:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:13:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:13:58,461 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:13:58,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:13:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:13:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:13:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:13:58,546 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 [2023-08-30 06:13:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:13:58,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:13:58,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:13:58,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256780523] [2023-08-30 06:13:58,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256780523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:13:58,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:13:58,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:13:58,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355099132] [2023-08-30 06:13:58,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:13:58,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:13:58,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:13:58,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:13:58,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:13:58,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-08-30 06:13:58,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 897 flow. Second operand has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:58,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:13:58,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-08-30 06:13:58,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:14:11,315 INFO L130 PetriNetUnfolder]: 99211/130997 cut-off events. [2023-08-30 06:14:11,315 INFO L131 PetriNetUnfolder]: For 138282/142932 co-relation queries the response was YES. [2023-08-30 06:14:11,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305974 conditions, 130997 events. 99211/130997 cut-off events. For 138282/142932 co-relation queries the response was YES. Maximal size of possible extension queue 5136. Compared 877447 event pairs, 57148 based on Foata normal form. 3720/79715 useless extension candidates. Maximal degree in co-relation 305939. Up to 129355 conditions per place. [2023-08-30 06:14:12,285 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 111 selfloop transitions, 26 changer transitions 0/153 dead transitions. [2023-08-30 06:14:12,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 1165 flow [2023-08-30 06:14:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:14:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:14:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 958 transitions. [2023-08-30 06:14:12,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261565836298932 [2023-08-30 06:14:12,287 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 958 transitions. [2023-08-30 06:14:12,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 958 transitions. [2023-08-30 06:14:12,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:14:12,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 958 transitions. [2023-08-30 06:14:12,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:12,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:12,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:12,291 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 897 flow. Second operand 4 states and 958 transitions. [2023-08-30 06:14:12,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 1165 flow [2023-08-30 06:14:13,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 153 transitions, 1164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:14:13,202 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 942 flow [2023-08-30 06:14:13,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=942, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2023-08-30 06:14:13,202 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 48 predicate places. [2023-08-30 06:14:13,202 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 942 flow [2023-08-30 06:14:13,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:13,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:14:13,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:14:13,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:14:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:13,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:14:13,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:14:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash 281383015, now seen corresponding path program 1 times [2023-08-30 06:14:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:14:13,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143415563] [2023-08-30 06:14:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:14:13,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:13,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:14:13,405 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:14:13,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:14:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:14:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:14:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:14:13,505 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 [2023-08-30 06:14:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:14:13,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:14:13,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:14:13,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143415563] [2023-08-30 06:14:13,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143415563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:14:13,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:14:13,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:14:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009381801] [2023-08-30 06:14:13,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:14:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:14:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:14:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:14:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:14:14,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 562 [2023-08-30 06:14:14,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 942 flow. Second operand has 5 states, 5 states have (on average 223.6) internal successors, (1118), 5 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:14,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:14:14,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 562 [2023-08-30 06:14:14,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:14:33,241 INFO L130 PetriNetUnfolder]: 132820/174669 cut-off events. [2023-08-30 06:14:33,241 INFO L131 PetriNetUnfolder]: For 101062/101062 co-relation queries the response was YES. [2023-08-30 06:14:33,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394124 conditions, 174669 events. 132820/174669 cut-off events. For 101062/101062 co-relation queries the response was YES. Maximal size of possible extension queue 6481. Compared 1178596 event pairs, 53629 based on Foata normal form. 0/103181 useless extension candidates. Maximal degree in co-relation 394088. Up to 138674 conditions per place. [2023-08-30 06:14:34,434 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 110 selfloop transitions, 75 changer transitions 0/189 dead transitions. [2023-08-30 06:14:34,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 189 transitions, 1426 flow [2023-08-30 06:14:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:14:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:14:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1172 transitions. [2023-08-30 06:14:34,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170818505338078 [2023-08-30 06:14:34,437 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1172 transitions. [2023-08-30 06:14:34,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1172 transitions. [2023-08-30 06:14:34,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:14:34,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1172 transitions. [2023-08-30 06:14:34,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.4) internal successors, (1172), 5 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:34,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:34,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:34,441 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 942 flow. Second operand 5 states and 1172 transitions. [2023-08-30 06:14:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 189 transitions, 1426 flow [2023-08-30 06:14:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 189 transitions, 1399 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:14:34,990 INFO L231 Difference]: Finished difference. Result has 122 places, 172 transitions, 1222 flow [2023-08-30 06:14:34,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1222, PETRI_PLACES=122, PETRI_TRANSITIONS=172} [2023-08-30 06:14:34,991 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 51 predicate places. [2023-08-30 06:14:34,991 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 172 transitions, 1222 flow [2023-08-30 06:14:34,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.6) internal successors, (1118), 5 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:34,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:14:34,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:14:34,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:14:35,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:35,193 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:14:35,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:14:35,194 INFO L85 PathProgramCache]: Analyzing trace with hash 142822277, now seen corresponding path program 1 times [2023-08-30 06:14:35,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:14:35,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966192444] [2023-08-30 06:14:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:14:35,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:35,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:14:35,197 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:14:35,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:14:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:14:35,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:14:35,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:14:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:14:35,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:14:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:14:35,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:14:35,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966192444] [2023-08-30 06:14:35,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966192444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:14:35,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:14:35,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:14:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861174105] [2023-08-30 06:14:35,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:14:35,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:14:35,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:14:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:14:35,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:14:36,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 562 [2023-08-30 06:14:36,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 172 transitions, 1222 flow. Second operand has 12 states, 12 states have (on average 226.5) internal successors, (2718), 12 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:36,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:14:36,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 562 [2023-08-30 06:14:36,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:14:49,498 INFO L130 PetriNetUnfolder]: 84775/115475 cut-off events. [2023-08-30 06:14:49,499 INFO L131 PetriNetUnfolder]: For 176738/180438 co-relation queries the response was YES. [2023-08-30 06:14:49,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298597 conditions, 115475 events. 84775/115475 cut-off events. For 176738/180438 co-relation queries the response was YES. Maximal size of possible extension queue 4184. Compared 796104 event pairs, 34517 based on Foata normal form. 2704/82908 useless extension candidates. Maximal degree in co-relation 298561. Up to 73593 conditions per place. [2023-08-30 06:14:50,538 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 257 selfloop transitions, 36 changer transitions 0/308 dead transitions. [2023-08-30 06:14:50,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 308 transitions, 2547 flow [2023-08-30 06:14:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:14:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:14:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2589 transitions. [2023-08-30 06:14:50,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187965059851181 [2023-08-30 06:14:50,543 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2589 transitions. [2023-08-30 06:14:50,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2589 transitions. [2023-08-30 06:14:50,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:14:50,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2589 transitions. [2023-08-30 06:14:50,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 235.36363636363637) internal successors, (2589), 11 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:50,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:50,551 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:50,551 INFO L175 Difference]: Start difference. First operand has 122 places, 172 transitions, 1222 flow. Second operand 11 states and 2589 transitions. [2023-08-30 06:14:50,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 308 transitions, 2547 flow [2023-08-30 06:14:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 308 transitions, 2391 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:14:50,940 INFO L231 Difference]: Finished difference. Result has 133 places, 176 transitions, 1269 flow [2023-08-30 06:14:50,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1269, PETRI_PLACES=133, PETRI_TRANSITIONS=176} [2023-08-30 06:14:50,940 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 62 predicate places. [2023-08-30 06:14:50,940 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 176 transitions, 1269 flow [2023-08-30 06:14:50,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 226.5) internal successors, (2718), 12 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:50,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:14:50,941 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2023-08-30 06:14:50,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:14:51,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:51,142 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:14:51,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:14:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 983668000, now seen corresponding path program 1 times [2023-08-30 06:14:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:14:51,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058746792] [2023-08-30 06:14:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:14:51,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:51,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:14:51,144 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:14:51,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:14:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:14:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:14:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:14:51,248 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 [2023-08-30 06:14:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:14:51,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:14:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:14:52,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:14:52,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058746792] [2023-08-30 06:14:52,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058746792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:14:52,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:14:52,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 06:14:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859186103] [2023-08-30 06:14:52,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:14:52,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:14:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:14:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:14:52,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:15:01,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 562 [2023-08-30 06:15:01,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 176 transitions, 1269 flow. Second operand has 16 states, 16 states have (on average 227.0625) internal successors, (3633), 16 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:01,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:15:01,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 562 [2023-08-30 06:15:01,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:15:05,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:15:07,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:15:09,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:15:11,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:15:13,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:15:15,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:15:17,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:15:41,110 INFO L130 PetriNetUnfolder]: 115921/155662 cut-off events. [2023-08-30 06:15:41,110 INFO L131 PetriNetUnfolder]: For 240363/248046 co-relation queries the response was YES. [2023-08-30 06:15:41,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425858 conditions, 155662 events. 115921/155662 cut-off events. For 240363/248046 co-relation queries the response was YES. Maximal size of possible extension queue 4925. Compared 1072237 event pairs, 63020 based on Foata normal form. 6378/115932 useless extension candidates. Maximal degree in co-relation 425817. Up to 20040 conditions per place. [2023-08-30 06:15:42,574 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 706 selfloop transitions, 45 changer transitions 0/768 dead transitions. [2023-08-30 06:15:42,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 768 transitions, 5316 flow [2023-08-30 06:15:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 06:15:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 06:15:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4350 transitions. [2023-08-30 06:15:42,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553066778312749 [2023-08-30 06:15:42,579 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4350 transitions. [2023-08-30 06:15:42,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4350 transitions. [2023-08-30 06:15:42,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:15:42,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4350 transitions. [2023-08-30 06:15:42,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 255.88235294117646) internal successors, (4350), 17 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:42,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:42,589 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:42,589 INFO L175 Difference]: Start difference. First operand has 133 places, 176 transitions, 1269 flow. Second operand 17 states and 4350 transitions. [2023-08-30 06:15:42,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 768 transitions, 5316 flow [2023-08-30 06:15:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 768 transitions, 5262 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-08-30 06:15:43,323 INFO L231 Difference]: Finished difference. Result has 155 places, 183 transitions, 1481 flow [2023-08-30 06:15:43,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1481, PETRI_PLACES=155, PETRI_TRANSITIONS=183} [2023-08-30 06:15:43,324 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 84 predicate places. [2023-08-30 06:15:43,324 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 183 transitions, 1481 flow [2023-08-30 06:15:43,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 227.0625) internal successors, (3633), 16 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:43,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:15:43,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:15:43,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:15:43,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:43,531 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:15:43,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:15:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash 132941280, now seen corresponding path program 1 times [2023-08-30 06:15:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:15:43,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139785554] [2023-08-30 06:15:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:15:43,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:43,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:15:43,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:15:43,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:15:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:15:43,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:15:43,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:15:43,717 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 [2023-08-30 06:15:43,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:15:43,937 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 [2023-08-30 06:15:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:15:44,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:15:44,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:15:44,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139785554] [2023-08-30 06:15:44,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139785554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:15:44,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:15:44,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:15:44,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440139156] [2023-08-30 06:15:44,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:15:44,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 06:15:44,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:15:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 06:15:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 06:15:46,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 06:15:46,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 183 transitions, 1481 flow. Second operand has 7 states, 7 states have (on average 221.28571428571428) internal successors, (1549), 7 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:46,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:15:46,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 06:15:46,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:06,492 INFO L130 PetriNetUnfolder]: 123417/164888 cut-off events. [2023-08-30 06:16:06,493 INFO L131 PetriNetUnfolder]: For 136507/139864 co-relation queries the response was YES. [2023-08-30 06:16:07,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441673 conditions, 164888 events. 123417/164888 cut-off events. For 136507/139864 co-relation queries the response was YES. Maximal size of possible extension queue 4938. Compared 1137846 event pairs, 52308 based on Foata normal form. 3637/117434 useless extension candidates. Maximal degree in co-relation 441624. Up to 132263 conditions per place. [2023-08-30 06:16:08,232 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 117 selfloop transitions, 97 changer transitions 0/219 dead transitions. [2023-08-30 06:16:08,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 219 transitions, 2068 flow [2023-08-30 06:16:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:16:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:16:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1382 transitions. [2023-08-30 06:16:08,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098457888493476 [2023-08-30 06:16:08,235 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1382 transitions. [2023-08-30 06:16:08,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1382 transitions. [2023-08-30 06:16:08,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:08,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1382 transitions. [2023-08-30 06:16:08,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.33333333333334) internal successors, (1382), 6 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,239 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,239 INFO L175 Difference]: Start difference. First operand has 155 places, 183 transitions, 1481 flow. Second operand 6 states and 1382 transitions. [2023-08-30 06:16:08,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 219 transitions, 2068 flow [2023-08-30 06:16:08,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 219 transitions, 1984 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-30 06:16:08,826 INFO L231 Difference]: Finished difference. Result has 151 places, 201 transitions, 1797 flow [2023-08-30 06:16:08,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1797, PETRI_PLACES=151, PETRI_TRANSITIONS=201} [2023-08-30 06:16:08,827 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 80 predicate places. [2023-08-30 06:16:08,827 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 201 transitions, 1797 flow [2023-08-30 06:16:08,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 221.28571428571428) internal successors, (1549), 7 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:08,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:16:08,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:09,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:09,029 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-08-30 06:16:09,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash 132941673, now seen corresponding path program 1 times [2023-08-30 06:16:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729088541] [2023-08-30 06:16:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:09,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:09,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:09,031 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:09,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:16:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:09,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:16:09,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:09,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:16:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:09,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:09,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729088541] [2023-08-30 06:16:09,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729088541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:16:09,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:16:09,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:16:09,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652484407] [2023-08-30 06:16:09,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:16:09,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:16:09,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:16:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:16:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 06:16:10,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 201 transitions, 1797 flow. Second operand has 12 states, 12 states have (on average 228.5) internal successors, (2742), 12 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) [2023-08-30 06:16:10,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:10,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 06:16:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand