./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-max.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-three-array-max.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 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:29:02,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:29:02,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:29:02,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:29:02,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:29:02,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:29:02,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:29:02,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:29:02,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:29:02,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:29:02,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:29:02,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:29:02,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:29:02,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:29:02,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:29:02,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:29:02,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:29:02,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:29:02,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:29:02,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:29:02,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:29:02,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:29:02,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:29:02,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:29:02,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:29:02,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:29:02,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:29:02,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:29:02,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:29:02,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:29:02,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:29:02,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:29:02,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:29:02,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:29:02,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:29:02,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:29:02,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:29:02,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:29:02,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:29:02,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:29:02,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:29:02,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:29:02,535 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:29:02,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:29:02,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:29:02,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:29:02,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:29:02,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:29:02,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:29:02,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:29:02,539 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:29:02,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:29:02,539 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:29:02,540 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:29:02,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:29:02,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:29:02,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:29:02,540 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:29:02,541 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:29:02,541 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:29:02,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:29:02,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:29:02,541 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:29:02,542 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:29:02,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:29:02,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:29:02,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:29:02,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:29:02,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:29:02,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:29:02,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:29:02,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:29:02,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:29:02,544 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:29:02,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:29:02,544 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:29:02,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:29:02,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:29:02,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:29:02,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:29:02,858 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:29:02,860 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:29:02,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c [2023-08-30 07:29:04,106 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:29:04,304 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:29:04,305 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c [2023-08-30 07:29:04,310 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa19df10/d41d8139ee424062a205d6ce77733f6d/FLAGb08a8b951 [2023-08-30 07:29:04,321 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa19df10/d41d8139ee424062a205d6ce77733f6d [2023-08-30 07:29:04,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:29:04,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:29:04,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:29:04,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:29:04,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:29:04,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:29:04" (1/1) ... [2023-08-30 07:29:04,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393b1255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:04, skipping insertion in model container [2023-08-30 07:29:04,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:29:04" (1/1) ... [2023-08-30 07:29:04,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:29:04,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:29:04,503 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-three-array-max.wvr.c[2823,2836] [2023-08-30 07:29:04,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:29:04,529 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:29:04,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a7b73c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:04, skipping insertion in model container [2023-08-30 07:29:04,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:29:04,530 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:29:04,531 INFO L158 Benchmark]: Toolchain (without parser) took 206.79ms. Allocated memory is still 81.8MB. Free memory was 57.5MB in the beginning and 47.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:29:04,532 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory was 36.7MB in the beginning and 36.6MB in the end (delta: 98.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:29:04,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.99ms. Allocated memory is still 81.8MB. Free memory was 57.2MB in the beginning and 47.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:29:04,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory was 36.7MB in the beginning and 36.6MB in the end (delta: 98.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.99ms. Allocated memory is still 81.8MB. Free memory was 57.2MB in the beginning and 47.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: 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-three-array-max.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 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:29:06,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:29:06,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:29:06,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:29:06,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:29:06,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:29:06,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:29:06,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:29:06,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:29:06,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:29:06,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:29:06,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:29:06,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:29:06,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:29:06,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:29:06,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:29:06,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:29:06,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:29:06,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:29:06,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:29:06,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:29:06,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:29:06,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:29:06,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:29:06,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:29:06,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:29:06,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:29:06,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:29:06,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:29:06,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:29:06,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:29:06,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:29:06,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:29:06,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:29:06,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:29:06,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:29:06,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:29:06,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:29:06,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:29:06,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:29:06,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:29:06,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:29:06,321 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:29:06,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:29:06,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:29:06,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:29:06,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:29:06,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:29:06,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:29:06,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:29:06,325 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:29:06,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:29:06,327 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:29:06,327 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:29:06,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:29:06,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:29:06,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:29:06,328 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:29:06,328 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:29:06,328 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:29:06,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:29:06,328 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:29:06,329 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:29:06,329 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:29:06,329 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:29:06,329 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:29:06,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:29:06,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:29:06,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:29:06,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:29:06,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:29:06,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:29:06,331 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:29:06,331 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:29:06,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:29:06,332 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:29:06,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:29:06,332 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:29:06,332 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:29:06,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:29:06,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:29:06,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:29:06,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:29:06,684 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:29:06,684 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:29:06,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c [2023-08-30 07:29:07,961 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:29:08,218 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:29:08,218 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c [2023-08-30 07:29:08,227 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e3beb62/a8d6a850d4244fb6ab22c91ce0f726cf/FLAGdae2c13cf [2023-08-30 07:29:08,245 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e3beb62/a8d6a850d4244fb6ab22c91ce0f726cf [2023-08-30 07:29:08,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:29:08,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:29:08,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:29:08,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:29:08,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:29:08,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a34f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08, skipping insertion in model container [2023-08-30 07:29:08,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:29:08,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:29:08,422 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-three-array-max.wvr.c[2823,2836] [2023-08-30 07:29:08,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:29:08,446 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:29:08,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:29:08,464 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-three-array-max.wvr.c[2823,2836] [2023-08-30 07:29:08,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:29:08,473 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:29:08,494 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-three-array-max.wvr.c[2823,2836] [2023-08-30 07:29:08,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:29:08,515 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:29:08,517 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:29:08,523 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:29:08,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08 WrapperNode [2023-08-30 07:29:08,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:29:08,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:29:08,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:29:08,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:29:08,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,598 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 229 [2023-08-30 07:29:08,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:29:08,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:29:08,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:29:08,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:29:08,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:29:08,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:29:08,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:29:08,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:29:08,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (1/1) ... [2023-08-30 07:29:08,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:29:08,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:29:08,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:29:08,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:29:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:29:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:29:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:29:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:29:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:29:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:29:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:29:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:29:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:29:08,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:29:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:29:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:29:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:29:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:29:08,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:29:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:29:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:29:08,727 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:29:08,878 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:29:08,880 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:29:09,548 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:29:09,681 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:29:09,682 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 07:29:09,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:29:09 BoogieIcfgContainer [2023-08-30 07:29:09,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:29:09,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:29:09,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:29:09,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:29:09,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:29:08" (1/3) ... [2023-08-30 07:29:09,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e2c984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:29:09, skipping insertion in model container [2023-08-30 07:29:09,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:29:08" (2/3) ... [2023-08-30 07:29:09,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e2c984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:29:09, skipping insertion in model container [2023-08-30 07:29:09,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:29:09" (3/3) ... [2023-08-30 07:29:09,693 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2023-08-30 07:29:09,709 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:29:09,709 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-08-30 07:29:09,709 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:29:09,833 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:29:09,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 326 transitions, 676 flow [2023-08-30 07:29:10,001 INFO L130 PetriNetUnfolder]: 27/323 cut-off events. [2023-08-30 07:29:10,003 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:29:10,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 323 events. 27/323 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 428 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 07:29:10,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 326 transitions, 676 flow [2023-08-30 07:29:10,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 319 transitions, 656 flow [2023-08-30 07:29:10,027 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:29:10,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 302 places, 319 transitions, 656 flow [2023-08-30 07:29:10,048 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 302 places, 319 transitions, 656 flow [2023-08-30 07:29:10,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 319 transitions, 656 flow [2023-08-30 07:29:10,113 INFO L130 PetriNetUnfolder]: 27/319 cut-off events. [2023-08-30 07:29:10,113 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:29:10,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 319 events. 27/319 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 434 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 07:29:10,119 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2023-08-30 07:29:52,307 INFO L134 LiptonReduction]: Checked pairs total: 9038 [2023-08-30 07:29:52,308 INFO L136 LiptonReduction]: Total number of compositions: 375 [2023-08-30 07:29:52,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:29:52,325 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;@31546fee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:29:52,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-08-30 07:29:52,329 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:29:52,329 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:29:52,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:29:52,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:29:52,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:29:52,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:29:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 42350, now seen corresponding path program 1 times [2023-08-30 07:29:52,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:29:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509378433] [2023-08-30 07:29:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:29:52,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:29:52,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:29:52,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:29:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:29:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:29:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:29:52,722 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:29:52,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:29:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:29:52,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:29:52,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:29:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509378433] [2023-08-30 07:29:52,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509378433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:29:52,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:29:52,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:29:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203172450] [2023-08-30 07:29:52,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:29:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:29:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:29:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:29:52,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:29:53,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-08-30 07:29:53,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:53,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:29:53,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-08-30 07:29:53,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:29:55,255 INFO L130 PetriNetUnfolder]: 9900/12210 cut-off events. [2023-08-30 07:29:55,256 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-30 07:29:55,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24567 conditions, 12210 events. 9900/12210 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53948 event pairs, 4614 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 22321. Up to 12128 conditions per place. [2023-08-30 07:29:55,340 INFO L137 encePairwiseOnDemand]: 686/701 looper letters, 64 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-30 07:29:55,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 296 flow [2023-08-30 07:29:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:29:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:29:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-08-30 07:29:55,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414170233000476 [2023-08-30 07:29:55,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-08-30 07:29:55,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-08-30 07:29:55,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:29:55,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-08-30 07:29:55,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:55,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:55,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:55,378 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 178 flow. Second operand 3 states and 913 transitions. [2023-08-30 07:29:55,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 296 flow [2023-08-30 07:29:55,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:29:55,393 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 163 flow [2023-08-30 07:29:55,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-08-30 07:29:55,398 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2023-08-30 07:29:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 163 flow [2023-08-30 07:29:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:55,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:29:55,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:29:55,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 07:29:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:55,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:29:55,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:29:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 42349, now seen corresponding path program 1 times [2023-08-30 07:29:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:29:55,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020858793] [2023-08-30 07:29:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:29:55,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:29:55,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:29:55,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:29:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:29:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:29:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:29:55,746 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:29:55,747 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 07:29:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:29:55,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:29:55,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:29:55,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020858793] [2023-08-30 07:29:55,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020858793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:29:55,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:29:55,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:29:55,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242870010] [2023-08-30 07:29:55,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:29:55,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:29:55,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:29:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:29:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:29:55,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-08-30 07:29:55,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:55,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:29:55,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-08-30 07:29:55,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:29:57,535 INFO L130 PetriNetUnfolder]: 9900/12206 cut-off events. [2023-08-30 07:29:57,535 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:29:57,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24424 conditions, 12206 events. 9900/12206 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53927 event pairs, 4614 based on Foata normal form. 2/3122 useless extension candidates. Maximal degree in co-relation 24400. Up to 12125 conditions per place. [2023-08-30 07:29:57,597 INFO L137 encePairwiseOnDemand]: 697/701 looper letters, 62 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-30 07:29:57,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 283 flow [2023-08-30 07:29:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:29:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:29:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-08-30 07:29:57,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270090347123157 [2023-08-30 07:29:57,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-08-30 07:29:57,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-08-30 07:29:57,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:29:57,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-08-30 07:29:57,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:57,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:57,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:57,609 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 163 flow. Second operand 3 states and 898 transitions. [2023-08-30 07:29:57,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 283 flow [2023-08-30 07:29:57,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 07:29:57,613 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 154 flow [2023-08-30 07:29:57,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-08-30 07:29:57,614 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -16 predicate places. [2023-08-30 07:29:57,614 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 154 flow [2023-08-30 07:29:57,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:57,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:29:57,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:29:57,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:29:57,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:57,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:29:57,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:29:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1317318, now seen corresponding path program 1 times [2023-08-30 07:29:57,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:29:57,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599723027] [2023-08-30 07:29:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:29:57,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:29:57,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:29:57,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:29:57,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:29:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:29:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:29:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:29:58,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:29:58,017 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 07:29:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:29:58,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:29:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:29:58,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:29:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599723027] [2023-08-30 07:29:58,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599723027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:29:58,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:29:58,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:29:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574530778] [2023-08-30 07:29:58,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:29:58,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:29:58,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:29:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:29:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:29:59,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 701 [2023-08-30 07:29:59,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:29:59,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:29:59,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 701 [2023-08-30 07:29:59,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:01,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:02,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:06,411 INFO L130 PetriNetUnfolder]: 29713/36628 cut-off events. [2023-08-30 07:30:06,411 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 07:30:06,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73272 conditions, 36628 events. 29713/36628 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2618. Compared 181270 event pairs, 13842 based on Foata normal form. 0/9798 useless extension candidates. Maximal degree in co-relation 73264. Up to 12131 conditions per place. [2023-08-30 07:30:06,599 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 164 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2023-08-30 07:30:06,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 204 transitions, 848 flow [2023-08-30 07:30:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:30:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:30:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1788 transitions. [2023-08-30 07:30:06,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42510699001426533 [2023-08-30 07:30:06,606 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1788 transitions. [2023-08-30 07:30:06,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1788 transitions. [2023-08-30 07:30:06,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:06,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1788 transitions. [2023-08-30 07:30:06,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:06,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:06,623 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:06,623 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 154 flow. Second operand 6 states and 1788 transitions. [2023-08-30 07:30:06,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 204 transitions, 848 flow [2023-08-30 07:30:06,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 204 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:30:06,628 INFO L231 Difference]: Finished difference. Result has 74 places, 100 transitions, 427 flow [2023-08-30 07:30:06,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=74, PETRI_TRANSITIONS=100} [2023-08-30 07:30:06,629 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2023-08-30 07:30:06,630 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 100 transitions, 427 flow [2023-08-30 07:30:06,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:06,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:06,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:30:06,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:06,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:06,847 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:06,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash 40874337, now seen corresponding path program 1 times [2023-08-30 07:30:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:06,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055493289] [2023-08-30 07:30:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:30:06,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:06,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:06,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:06,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:30:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:30:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:30:06,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:06,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:30:06,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:06,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055493289] [2023-08-30 07:30:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055493289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:30:06,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:30:06,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:30:06,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334747865] [2023-08-30 07:30:06,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:30:06,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:30:06,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:06,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:30:06,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:30:07,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 701 [2023-08-30 07:30:07,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 100 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:07,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:07,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 701 [2023-08-30 07:30:07,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:10,381 INFO L130 PetriNetUnfolder]: 29712/36627 cut-off events. [2023-08-30 07:30:10,381 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 07:30:10,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73400 conditions, 36627 events. 29712/36627 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 183085 event pairs, 13842 based on Foata normal form. 1/9379 useless extension candidates. Maximal degree in co-relation 73386. Up to 36384 conditions per place. [2023-08-30 07:30:10,584 INFO L137 encePairwiseOnDemand]: 698/701 looper letters, 92 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-30 07:30:10,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 611 flow [2023-08-30 07:30:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:30:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:30:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-30 07:30:10,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43081312410841655 [2023-08-30 07:30:10,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-30 07:30:10,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-30 07:30:10,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:10,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-30 07:30:10,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:10,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:10,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:10,596 INFO L175 Difference]: Start difference. First operand has 74 places, 100 transitions, 427 flow. Second operand 3 states and 906 transitions. [2023-08-30 07:30:10,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 611 flow [2023-08-30 07:30:10,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 599 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 07:30:10,604 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 415 flow [2023-08-30 07:30:10,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2023-08-30 07:30:10,605 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-08-30 07:30:10,606 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 415 flow [2023-08-30 07:30:10,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:10,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:10,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:30:10,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:10,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:10,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:10,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1266118544, now seen corresponding path program 1 times [2023-08-30 07:30:10,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:10,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809419818] [2023-08-30 07:30:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:30:10,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:10,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:10,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:30:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:30:10,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:30:10,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:10,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:30:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:11,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:11,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809419818] [2023-08-30 07:30:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809419818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:30:11,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:30:11,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 07:30:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394098609] [2023-08-30 07:30:11,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:30:11,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:30:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:30:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:30:11,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 701 [2023-08-30 07:30:11,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:11,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:11,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 701 [2023-08-30 07:30:11,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:17,675 INFO L130 PetriNetUnfolder]: 49514/61037 cut-off events. [2023-08-30 07:30:17,675 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 07:30:17,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122285 conditions, 61037 events. 49514/61037 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 4670. Compared 320135 event pairs, 23070 based on Foata normal form. 4/16500 useless extension candidates. Maximal degree in co-relation 122269. Up to 36377 conditions per place. [2023-08-30 07:30:17,967 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 187 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2023-08-30 07:30:17,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 223 transitions, 1247 flow [2023-08-30 07:30:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:30:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:30:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2392 transitions. [2023-08-30 07:30:17,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653352353780316 [2023-08-30 07:30:17,975 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2392 transitions. [2023-08-30 07:30:17,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2392 transitions. [2023-08-30 07:30:17,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:30:17,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2392 transitions. [2023-08-30 07:30:17,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 299.0) internal successors, (2392), 8 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:17,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:17,990 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:17,990 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 415 flow. Second operand 8 states and 2392 transitions. [2023-08-30 07:30:17,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 223 transitions, 1247 flow [2023-08-30 07:30:17,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 223 transitions, 1243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:30:17,995 INFO L231 Difference]: Finished difference. Result has 86 places, 119 transitions, 713 flow [2023-08-30 07:30:17,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=713, PETRI_PLACES=86, PETRI_TRANSITIONS=119} [2023-08-30 07:30:17,996 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2023-08-30 07:30:17,996 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 119 transitions, 713 flow [2023-08-30 07:30:17,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:17,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:30:17,997 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:30:18,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:30:18,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:18,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:30:18,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:30:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 593951598, now seen corresponding path program 2 times [2023-08-30 07:30:18,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:30:18,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961506869] [2023-08-30 07:30:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:30:18,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:30:18,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:30:18,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:30:18,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:30:18,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:30:18,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:30:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:30:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:30:18,410 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:30:18,410 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 07:30:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:18,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:30:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:30:19,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:30:19,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961506869] [2023-08-30 07:30:19,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961506869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:30:19,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:30:19,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:30:19,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168017858] [2023-08-30 07:30:19,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:30:19,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:30:19,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:30:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:30:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:30:25,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 701 [2023-08-30 07:30:25,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 119 transitions, 713 flow. Second operand has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:30:25,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:30:25,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 701 [2023-08-30 07:30:25,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:30:28,568 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 07:30:30,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:31,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:33,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:36,078 WARN L539 Checker$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 07:30:37,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:39,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:40,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:42,603 WARN L539 Checker$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 07:30:43,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:45,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:49,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:51,325 WARN L539 Checker$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 07:30:53,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:54,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:30:56,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:31:13,057 INFO L130 PetriNetUnfolder]: 128680/158619 cut-off events. [2023-08-30 07:31:13,057 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-08-30 07:31:13,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317768 conditions, 158619 events. 128680/158619 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 8338. Compared 889141 event pairs, 59982 based on Foata normal form. 12/42996 useless extension candidates. Maximal degree in co-relation 317747. Up to 24235 conditions per place. [2023-08-30 07:31:14,221 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 519 selfloop transitions, 92 changer transitions 0/616 dead transitions. [2023-08-30 07:31:14,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 616 transitions, 3431 flow [2023-08-30 07:31:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 07:31:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 07:31:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5125 transitions. [2023-08-30 07:31:14,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300579004783083 [2023-08-30 07:31:14,237 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5125 transitions. [2023-08-30 07:31:14,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5125 transitions. [2023-08-30 07:31:14,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:31:14,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5125 transitions. [2023-08-30 07:31:14,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 301.47058823529414) internal successors, (5125), 17 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:14,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 701.0) internal successors, (12618), 18 states have internal predecessors, (12618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:14,267 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 701.0) internal successors, (12618), 18 states have internal predecessors, (12618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:14,267 INFO L175 Difference]: Start difference. First operand has 86 places, 119 transitions, 713 flow. Second operand 17 states and 5125 transitions. [2023-08-30 07:31:14,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 616 transitions, 3431 flow [2023-08-30 07:31:14,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 616 transitions, 3431 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:31:14,278 INFO L231 Difference]: Finished difference. Result has 108 places, 191 transitions, 1445 flow [2023-08-30 07:31:14,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1445, PETRI_PLACES=108, PETRI_TRANSITIONS=191} [2023-08-30 07:31:14,281 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 27 predicate places. [2023-08-30 07:31:14,281 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 191 transitions, 1445 flow [2023-08-30 07:31:14,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:14,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:31:14,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:31:14,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:31:14,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:31:14,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:31:14,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:31:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115871, now seen corresponding path program 1 times [2023-08-30 07:31:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:31:14,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890829926] [2023-08-30 07:31:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:31:14,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:31:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:31:14,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:31:14,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:31:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:31:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:31:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:31:14,731 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:31:14,732 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 07:31:14,813 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:31:14,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:31:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:31:14,964 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 07:31:14,974 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 07:31:14,975 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 07:31:15,044 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 07:31:15,045 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 16 treesize of output 18 [2023-08-30 07:31:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:31:15,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:31:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:31:19,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:31:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890829926] [2023-08-30 07:31:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890829926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:31:19,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:31:19,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:31:19,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374365096] [2023-08-30 07:31:19,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:31:19,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:31:19,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:31:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:31:19,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:31:24,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:29,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 701 [2023-08-30 07:31:29,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 191 transitions, 1445 flow. Second operand has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:29,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:31:29,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 701 [2023-08-30 07:31:29,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:31:42,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:45,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:47,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:49,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:51,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:53,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:55,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:31:57,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:31:59,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:01,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:08,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:32:45,017 INFO L130 PetriNetUnfolder]: 237548/292790 cut-off events. [2023-08-30 07:32:45,017 INFO L131 PetriNetUnfolder]: For 740/740 co-relation queries the response was YES. [2023-08-30 07:32:46,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586656 conditions, 292790 events. 237548/292790 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 12217. Compared 1728459 event pairs, 110736 based on Foata normal form. 3/79916 useless extension candidates. Maximal degree in co-relation 586627. Up to 72684 conditions per place. [2023-08-30 07:32:47,045 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 468 selfloop transitions, 191 changer transitions 0/664 dead transitions. [2023-08-30 07:32:47,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 664 transitions, 4547 flow [2023-08-30 07:32:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 07:32:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 07:32:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5764 transitions. [2023-08-30 07:32:47,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915494871272332 [2023-08-30 07:32:47,060 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5764 transitions. [2023-08-30 07:32:47,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5764 transitions. [2023-08-30 07:32:47,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:32:47,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5764 transitions. [2023-08-30 07:32:47,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 274.4761904761905) internal successors, (5764), 21 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:47,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:47,089 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:47,089 INFO L175 Difference]: Start difference. First operand has 108 places, 191 transitions, 1445 flow. Second operand 21 states and 5764 transitions. [2023-08-30 07:32:47,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 664 transitions, 4547 flow [2023-08-30 07:32:47,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 664 transitions, 4283 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-08-30 07:32:47,105 INFO L231 Difference]: Finished difference. Result has 132 places, 278 transitions, 2536 flow [2023-08-30 07:32:47,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2536, PETRI_PLACES=132, PETRI_TRANSITIONS=278} [2023-08-30 07:32:47,106 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 51 predicate places. [2023-08-30 07:32:47,106 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 278 transitions, 2536 flow [2023-08-30 07:32:47,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:47,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:32:47,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:32:47,119 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 (8)] Ended with exit code 0 [2023-08-30 07:32:47,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:32:47,317 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 07:32:47,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:47,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115909, now seen corresponding path program 1 times [2023-08-30 07:32:47,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:47,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982901489] [2023-08-30 07:32:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:32:47,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:32:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:47,320 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:32:47,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:32:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:32:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:32:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:47,720 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2023-08-30 07:32:47,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 59 [2023-08-30 07:32:48,121 INFO L321 Elim1Store]: treesize reduction 48, result has 68.6 percent of original size [2023-08-30 07:32:48,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 163 [2023-08-30 07:32:58,661 INFO L321 Elim1Store]: treesize reduction 72, result has 75.1 percent of original size [2023-08-30 07:32:58,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 329 Killed by 15