./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-trans.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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:05:46,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:05:46,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:05:46,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:05:46,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:05:46,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:05:46,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:05:46,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:05:46,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:05:46,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:05:46,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:05:46,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:05:46,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:05:46,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:05:46,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:05:46,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:05:46,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:05:46,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:05:46,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:05:46,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:05:46,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:05:46,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:05:46,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:05:46,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:05:46,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:05:46,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:05:46,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:05:46,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:05:46,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:05:46,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:05:46,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:05:46,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:05:46,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:05:46,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:05:46,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:05:46,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:05:46,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:05:46,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:05:46,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:05:46,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:05:46,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:05:46,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:05:46,451 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:05:46,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:05:46,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:05:46,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:05:46,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:05:46,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:05:46,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:05:46,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:05:46,455 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:05:46,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:05:46,456 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:05:46,456 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:05:46,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:05:46,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:05:46,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:05:46,457 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:05:46,457 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:05:46,457 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:05:46,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:05:46,458 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:05:46,458 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:05:46,458 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:05:46,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:05:46,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:05:46,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:05:46,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:05:46,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:05:46,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:05:46,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:05:46,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:05:46,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:05:46,460 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:05:46,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:05:46,461 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:05:46,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:05:46,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:05:46,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:05:46,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:05:46,791 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:05:46,791 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:05:46,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-08-29 23:05:47,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:05:48,138 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:05:48,138 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-08-29 23:05:48,144 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f654ba38/ac3e0ccdc8db45838228d32af29b5c5a/FLAGd22f3b5be [2023-08-29 23:05:48,157 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f654ba38/ac3e0ccdc8db45838228d32af29b5c5a [2023-08-29 23:05:48,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:05:48,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:05:48,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:05:48,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:05:48,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:05:48,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:05:48" (1/1) ... [2023-08-29 23:05:48,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39566aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:48, skipping insertion in model container [2023-08-29 23:05:48,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:05:48" (1/1) ... [2023-08-29 23:05:48,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:05:48,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:05:48,406 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/chl-word-trans.wvr.c[3292,3305] [2023-08-29 23:05:48,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:05:48,434 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) [2023-08-29 23:05:48,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a3b1228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:48, skipping insertion in model container [2023-08-29 23:05:48,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:05:48,436 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:05:48,438 INFO L158 Benchmark]: Toolchain (without parser) took 276.34ms. Allocated memory is still 83.9MB. Free memory was 60.7MB in the beginning and 50.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:05:48,439 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 58.7MB. Free memory is still 36.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:05:48,439 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.48ms. Allocated memory is still 83.9MB. Free memory was 60.7MB in the beginning and 50.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:05:48,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 58.7MB. Free memory is still 36.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.48ms. Allocated memory is still 83.9MB. Free memory was 60.7MB in the beginning and 50.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 137]: 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/chl-word-trans.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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:05:50,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:05:50,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:05:50,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:05:50,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:05:50,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:05:50,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:05:50,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:05:50,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:05:50,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:05:50,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:05:50,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:05:50,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:05:50,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:05:50,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:05:50,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:05:50,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:05:50,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:05:50,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:05:50,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:05:50,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:05:50,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:05:50,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:05:50,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:05:50,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:05:50,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:05:50,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:05:50,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:05:50,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:05:50,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:05:50,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:05:50,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:05:50,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:05:50,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:05:50,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:05:50,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:05:50,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:05:50,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:05:50,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:05:50,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:05:50,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:05:50,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:05:50,329 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:05:50,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:05:50,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:05:50,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:05:50,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:05:50,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:05:50,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:05:50,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:05:50,333 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:05:50,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:05:50,334 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:05:50,334 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:05:50,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:05:50,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:05:50,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:05:50,335 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:05:50,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:05:50,335 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:05:50,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:05:50,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:05:50,336 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:05:50,336 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:05:50,336 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:05:50,336 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:05:50,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:05:50,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:05:50,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:05:50,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:05:50,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:05:50,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:05:50,338 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:05:50,338 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:05:50,338 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:05:50,339 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:05:50,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:05:50,339 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:05:50,339 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:05:50,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:05:50,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:05:50,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:05:50,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:05:50,672 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:05:50,673 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:05:50,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-08-29 23:05:51,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:05:52,038 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:05:52,039 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-trans.wvr.c [2023-08-29 23:05:52,050 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eb1b1cd0/9b034c290a8f4924a39ecbc14473b5a3/FLAG014ec6b8c [2023-08-29 23:05:52,060 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eb1b1cd0/9b034c290a8f4924a39ecbc14473b5a3 [2023-08-29 23:05:52,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:05:52,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:05:52,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:05:52,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:05:52,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:05:52,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2d4261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52, skipping insertion in model container [2023-08-29 23:05:52,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:05:52,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:05:52,307 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/chl-word-trans.wvr.c[3292,3305] [2023-08-29 23:05:52,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:05:52,343 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:05:52,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:05:52,386 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/chl-word-trans.wvr.c[3292,3305] [2023-08-29 23:05:52,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:05:52,396 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:05:52,434 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/chl-word-trans.wvr.c[3292,3305] [2023-08-29 23:05:52,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:05:52,454 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:05:52,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52 WrapperNode [2023-08-29 23:05:52,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:05:52,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:05:52,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:05:52,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:05:52,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,523 INFO L138 Inliner]: procedures = 27, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 172 [2023-08-29 23:05:52,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:05:52,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:05:52,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:05:52,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:05:52,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,577 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:05:52,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:05:52,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:05:52,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:05:52,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (1/1) ... [2023-08-29 23:05:52,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:05:52,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:05:52,626 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) [2023-08-29 23:05:52,629 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 [2023-08-29 23:05:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:05:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:05:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:05:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:05:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:05:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:05:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:05:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:05:52,663 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:05:52,821 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:05:52,823 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:05:53,441 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:05:53,449 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:05:53,449 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 23:05:53,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:05:53 BoogieIcfgContainer [2023-08-29 23:05:53,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:05:53,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:05:53,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:05:53,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:05:53,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:05:52" (1/3) ... [2023-08-29 23:05:53,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67393fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:05:53, skipping insertion in model container [2023-08-29 23:05:53,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:05:52" (2/3) ... [2023-08-29 23:05:53,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67393fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:05:53, skipping insertion in model container [2023-08-29 23:05:53,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:05:53" (3/3) ... [2023-08-29 23:05:53,458 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2023-08-29 23:05:53,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:05:53,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-29 23:05:53,473 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:05:53,595 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:05:53,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 328 transitions, 680 flow [2023-08-29 23:05:53,800 INFO L130 PetriNetUnfolder]: 28/325 cut-off events. [2023-08-29 23:05:53,800 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:05:53,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 325 events. 28/325 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 625 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-29 23:05:53,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 310 places, 328 transitions, 680 flow [2023-08-29 23:05:53,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 321 transitions, 660 flow [2023-08-29 23:05:53,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:05:53,838 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 303 places, 321 transitions, 660 flow [2023-08-29 23:05:53,841 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 303 places, 321 transitions, 660 flow [2023-08-29 23:05:53,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 321 transitions, 660 flow [2023-08-29 23:05:53,905 INFO L130 PetriNetUnfolder]: 28/321 cut-off events. [2023-08-29 23:05:53,905 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:05:53,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 321 events. 28/321 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 622 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. [2023-08-29 23:05:53,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2023-08-29 23:06:24,982 INFO L134 LiptonReduction]: Checked pairs total: 25151 [2023-08-29 23:06:24,982 INFO L136 LiptonReduction]: Total number of compositions: 359 [2023-08-29 23:06:24,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:06:24,998 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;@699c9fed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:06:24,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-29 23:06:25,000 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:06:25,001 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:06:25,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:25,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:06:25,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:06:25,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 40810, now seen corresponding path program 1 times [2023-08-29 23:06:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:06:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505369169] [2023-08-29 23:06:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:25,016 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 [2023-08-29 23:06:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:06:25,027 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) [2023-08-29 23:06:25,036 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 [2023-08-29 23:06:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:06:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:06:25,270 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:06:25,271 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 [2023-08-29 23:06:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:25,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:06:25,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:06:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505369169] [2023-08-29 23:06:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505369169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:25,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:25,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:06:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657499470] [2023-08-29 23:06:25,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:06:25,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:06:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:06:25,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:06:25,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 687 [2023-08-29 23:06:25,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:25,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:25,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 687 [2023-08-29 23:06:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:28,858 INFO L130 PetriNetUnfolder]: 20232/26991 cut-off events. [2023-08-29 23:06:28,859 INFO L131 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2023-08-29 23:06:28,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54515 conditions, 26991 events. 20232/26991 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 142694 event pairs, 15757 based on Foata normal form. 0/8337 useless extension candidates. Maximal degree in co-relation 51676. Up to 26991 conditions per place. [2023-08-29 23:06:29,106 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-29 23:06:29,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 314 flow [2023-08-29 23:06:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 961 transitions. [2023-08-29 23:06:29,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46627850557981565 [2023-08-29 23:06:29,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 961 transitions. [2023-08-29 23:06:29,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 961 transitions. [2023-08-29 23:06:29,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:29,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 961 transitions. [2023-08-29 23:06:29,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:29,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:29,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:29,140 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 182 flow. Second operand 3 states and 961 transitions. [2023-08-29 23:06:29,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 314 flow [2023-08-29 23:06:29,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:06:29,149 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 156 flow [2023-08-29 23:06:29,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-08-29 23:06:29,154 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-08-29 23:06:29,155 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 156 flow [2023-08-29 23:06:29,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:29,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:29,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:06:29,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:06:29,376 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 [2023-08-29 23:06:29,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:06:29,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash 40812, now seen corresponding path program 1 times [2023-08-29 23:06:29,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:06:29,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324165091] [2023-08-29 23:06:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:29,378 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 [2023-08-29 23:06:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:06:29,379 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) [2023-08-29 23:06:29,389 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 [2023-08-29 23:06:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:29,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:06:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:06:29,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:06:29,565 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 [2023-08-29 23:06:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:29,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:06:29,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:06:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324165091] [2023-08-29 23:06:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324165091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:29,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:29,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:06:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110990042] [2023-08-29 23:06:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:06:29,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:06:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:06:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:06:30,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 687 [2023-08-29 23:06:30,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:30,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:30,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 687 [2023-08-29 23:06:30,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:34,751 INFO L130 PetriNetUnfolder]: 40463/53978 cut-off events. [2023-08-29 23:06:34,751 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2023-08-29 23:06:34,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108382 conditions, 53978 events. 40463/53978 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 2748. Compared 310311 event pairs, 31514 based on Foata normal form. 0/16673 useless extension candidates. Maximal degree in co-relation 108376. Up to 26992 conditions per place. [2023-08-29 23:06:35,038 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 138 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-29 23:06:35,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 144 transitions, 590 flow [2023-08-29 23:06:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-08-29 23:06:35,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978165938864629 [2023-08-29 23:06:35,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-08-29 23:06:35,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-08-29 23:06:35,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:35,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-08-29 23:06:35,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:35,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:35,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:35,050 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 156 flow. Second operand 3 states and 1026 transitions. [2023-08-29 23:06:35,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 144 transitions, 590 flow [2023-08-29 23:06:35,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 589 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:06:35,054 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 205 flow [2023-08-29 23:06:35,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-29 23:06:35,055 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-08-29 23:06:35,055 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 205 flow [2023-08-29 23:06:35,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:35,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:35,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:06:35,069 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 [2023-08-29 23:06:35,266 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 [2023-08-29 23:06:35,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:06:35,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1269838, now seen corresponding path program 1 times [2023-08-29 23:06:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:06:35,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749567005] [2023-08-29 23:06:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:35,272 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 [2023-08-29 23:06:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:06:35,275 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) [2023-08-29 23:06:35,278 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 [2023-08-29 23:06:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:35,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:06:35,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:06:35,452 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:06:35,452 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 [2023-08-29 23:06:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:35,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:06:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:35,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:06:35,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749567005] [2023-08-29 23:06:35,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749567005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:06:35,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:06:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:06:35,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989879120] [2023-08-29 23:06:35,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:06:35,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:06:35,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:06:35,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:06:35,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:06:37,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 687 [2023-08-29 23:06:37,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:37,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:37,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 687 [2023-08-29 23:06:37,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:38,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:06:40,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:06:46,331 INFO L130 PetriNetUnfolder]: 60704/80981 cut-off events. [2023-08-29 23:06:46,331 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-08-29 23:06:46,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162641 conditions, 80981 events. 60704/80981 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 3597. Compared 485371 event pairs, 47271 based on Foata normal form. 0/25030 useless extension candidates. Maximal degree in co-relation 162632. Up to 26993 conditions per place. [2023-08-29 23:06:46,700 INFO L137 encePairwiseOnDemand]: 675/687 looper letters, 203 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2023-08-29 23:06:46,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 230 transitions, 1021 flow [2023-08-29 23:06:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:06:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:06:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1907 transitions. [2023-08-29 23:06:46,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626394953905871 [2023-08-29 23:06:46,706 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1907 transitions. [2023-08-29 23:06:46,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1907 transitions. [2023-08-29 23:06:46,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:46,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1907 transitions. [2023-08-29 23:06:46,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 317.8333333333333) internal successors, (1907), 6 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:46,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:46,719 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:46,719 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 205 flow. Second operand 6 states and 1907 transitions. [2023-08-29 23:06:46,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 230 transitions, 1021 flow [2023-08-29 23:06:46,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 230 transitions, 997 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:06:46,729 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 397 flow [2023-08-29 23:06:46,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2023-08-29 23:06:46,730 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-08-29 23:06:46,730 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 397 flow [2023-08-29 23:06:46,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:46,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:46,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:06:46,744 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 [2023-08-29 23:06:46,940 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 [2023-08-29 23:06:46,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:06:46,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash 39432228, now seen corresponding path program 1 times [2023-08-29 23:06:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:06:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574044316] [2023-08-29 23:06:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:46,942 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 [2023-08-29 23:06:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:06:46,943 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) [2023-08-29 23:06:46,944 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 [2023-08-29 23:06:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:47,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:06:47,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:06:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:47,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:47,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:47,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:47,150 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 23:06:47,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 23:06:47,178 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:06:47,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:06:47,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:47,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:06:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:47,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:06:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:47,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:06:47,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:06:47,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574044316] [2023-08-29 23:06:47,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574044316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:47,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:47,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:06:47,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875733916] [2023-08-29 23:06:47,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:47,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:06:47,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:06:47,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:06:47,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:06:47,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 687 [2023-08-29 23:06:47,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:47,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:06:47,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 687 [2023-08-29 23:06:47,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:06:52,512 INFO L130 PetriNetUnfolder]: 46590/62748 cut-off events. [2023-08-29 23:06:52,512 INFO L131 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2023-08-29 23:06:52,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126237 conditions, 62748 events. 46590/62748 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 2960. Compared 376238 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 126224. Up to 62748 conditions per place. [2023-08-29 23:06:52,843 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 95 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-29 23:06:52,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 569 flow [2023-08-29 23:06:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:06:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:06:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 974 transitions. [2023-08-29 23:06:52,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725861232411451 [2023-08-29 23:06:52,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 974 transitions. [2023-08-29 23:06:52,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 974 transitions. [2023-08-29 23:06:52,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:06:52,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 974 transitions. [2023-08-29 23:06:52,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,863 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 397 flow. Second operand 3 states and 974 transitions. [2023-08-29 23:06:52,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 569 flow [2023-08-29 23:06:52,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 96 transitions, 539 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 23:06:52,868 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 349 flow [2023-08-29 23:06:52,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-08-29 23:06:52,870 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-08-29 23:06:52,870 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 349 flow [2023-08-29 23:06:52,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:06:52,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:06:52,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:06:52,884 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 [2023-08-29 23:06:53,082 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 [2023-08-29 23:06:53,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:06:53,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:06:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash 39432229, now seen corresponding path program 1 times [2023-08-29 23:06:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:06:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304076993] [2023-08-29 23:06:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:06:53,083 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 [2023-08-29 23:06:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:06:53,088 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) [2023-08-29 23:06:53,089 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 [2023-08-29 23:06:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:06:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:06:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:06:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:53,261 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 23:06:53,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 23:06:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:06:53,536 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:06:53,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 23:06:53,824 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-29 23:06:53,824 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-29 23:06:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:06:56,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:06:56,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:06:56,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304076993] [2023-08-29 23:06:56,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304076993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:06:56,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:06:56,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:06:56,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923825420] [2023-08-29 23:06:56,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:06:56,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:06:56,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:06:56,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:06:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-29 23:06:58,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:01,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:03,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:05,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:07,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:10,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:12,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:13,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:16,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:18,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:07:18,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 687 [2023-08-29 23:07:18,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 349 flow. Second operand has 5 states, 5 states have (on average 245.8) internal successors, (1229), 5 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:18,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:18,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 687 [2023-08-29 23:07:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:22,801 INFO L130 PetriNetUnfolder]: 32476/44515 cut-off events. [2023-08-29 23:07:22,801 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2023-08-29 23:07:22,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89745 conditions, 44515 events. 32476/44515 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 2103. Compared 266327 event pairs, 24927 based on Foata normal form. 0/16799 useless extension candidates. Maximal degree in co-relation 89731. Up to 44515 conditions per place. [2023-08-29 23:07:23,016 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 91 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-08-29 23:07:23,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 513 flow [2023-08-29 23:07:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:07:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:07:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 807 transitions. [2023-08-29 23:07:23,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915574963609898 [2023-08-29 23:07:23,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 807 transitions. [2023-08-29 23:07:23,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 807 transitions. [2023-08-29 23:07:23,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:23,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 807 transitions. [2023-08-29 23:07:23,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:23,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:23,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:23,030 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 349 flow. Second operand 3 states and 807 transitions. [2023-08-29 23:07:23,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 513 flow [2023-08-29 23:07:23,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:07:23,035 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 330 flow [2023-08-29 23:07:23,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2023-08-29 23:07:23,038 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-08-29 23:07:23,040 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 330 flow [2023-08-29 23:07:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.8) internal successors, (1229), 5 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:23,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:07:23,055 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 [2023-08-29 23:07:23,255 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 [2023-08-29 23:07:23,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:07:23,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash -760304014, now seen corresponding path program 1 times [2023-08-29 23:07:23,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:07:23,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653915503] [2023-08-29 23:07:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:23,257 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 [2023-08-29 23:07:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:07:23,257 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) [2023-08-29 23:07:23,258 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 [2023-08-29 23:07:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:07:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:07:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:07:23,432 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-29 23:07:23,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-29 23:07:23,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-29 23:07:23,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:07:23,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:07:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:07:23,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:07:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:23,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:07:23,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:07:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653915503] [2023-08-29 23:07:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653915503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:07:23,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:07:23,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:07:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128573289] [2023-08-29 23:07:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:07:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:07:23,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:07:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:07:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:07:23,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 687 [2023-08-29 23:07:23,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:23,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:23,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 687 [2023-08-29 23:07:23,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:27,290 INFO L130 PetriNetUnfolder]: 31756/43459 cut-off events. [2023-08-29 23:07:27,291 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2023-08-29 23:07:27,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87634 conditions, 43459 events. 31756/43459 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 2056. Compared 258644 event pairs, 24363 based on Foata normal form. 0/16595 useless extension candidates. Maximal degree in co-relation 87619. Up to 43459 conditions per place. [2023-08-29 23:07:27,485 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-08-29 23:07:27,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 506 flow [2023-08-29 23:07:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:07:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:07:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2023-08-29 23:07:27,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47064531780688984 [2023-08-29 23:07:27,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2023-08-29 23:07:27,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2023-08-29 23:07:27,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:27,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2023-08-29 23:07:27,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:27,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:27,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:27,494 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 330 flow. Second operand 3 states and 970 transitions. [2023-08-29 23:07:27,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 506 flow [2023-08-29 23:07:27,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:07:27,496 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 327 flow [2023-08-29 23:07:27,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2023-08-29 23:07:27,497 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-08-29 23:07:27,497 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 327 flow [2023-08-29 23:07:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:27,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:27,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:07:27,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-29 23:07:27,706 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 [2023-08-29 23:07:27,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:07:27,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash -760304015, now seen corresponding path program 1 times [2023-08-29 23:07:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:07:27,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968110570] [2023-08-29 23:07:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:27,708 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 [2023-08-29 23:07:27,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:07:27,709 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) [2023-08-29 23:07:27,710 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 [2023-08-29 23:07:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:07:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:07:27,877 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 23:07:27,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 23:07:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:07:28,074 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-29 23:07:28,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 23:07:28,228 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-29 23:07:28,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-29 23:07:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:28,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:07:28,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:07:28,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968110570] [2023-08-29 23:07:28,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968110570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:07:28,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:07:28,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:07:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100686754] [2023-08-29 23:07:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:07:28,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:07:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:07:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:07:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:07:28,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 687 [2023-08-29 23:07:28,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:28,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:28,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 687 [2023-08-29 23:07:28,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:32,414 INFO L130 PetriNetUnfolder]: 31036/42403 cut-off events. [2023-08-29 23:07:32,415 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2023-08-29 23:07:32,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85523 conditions, 42403 events. 31036/42403 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 250851 event pairs, 23799 based on Foata normal form. 0/16391 useless extension candidates. Maximal degree in co-relation 85507. Up to 42403 conditions per place. [2023-08-29 23:07:32,619 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 87 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-29 23:07:32,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 499 flow [2023-08-29 23:07:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:07:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:07:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2023-08-29 23:07:32,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696749150897622 [2023-08-29 23:07:32,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2023-08-29 23:07:32,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2023-08-29 23:07:32,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:32,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2023-08-29 23:07:32,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:32,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:32,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:32,628 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 327 flow. Second operand 3 states and 968 transitions. [2023-08-29 23:07:32,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 499 flow [2023-08-29 23:07:32,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:07:32,631 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 324 flow [2023-08-29 23:07:32,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2023-08-29 23:07:32,632 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2023-08-29 23:07:32,632 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 324 flow [2023-08-29 23:07:32,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:32,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:32,632 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:07:32,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:07:32,841 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 [2023-08-29 23:07:32,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:07:32,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash -820328468, now seen corresponding path program 2 times [2023-08-29 23:07:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:07:32,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250858424] [2023-08-29 23:07:32,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:07:32,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:07:32,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:07:32,844 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) [2023-08-29 23:07:32,845 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 [2023-08-29 23:07:32,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:07:32,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:07:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:07:32,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:07:33,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:07:33,007 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 [2023-08-29 23:07:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:33,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:07:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:33,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:07:33,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250858424] [2023-08-29 23:07:33,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250858424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:07:33,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:07:33,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:07:33,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919056565] [2023-08-29 23:07:33,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:07:33,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:07:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:07:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:07:33,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:07:40,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 687 [2023-08-29 23:07:40,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 282.0) internal successors, (3384), 12 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:40,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:40,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 687 [2023-08-29 23:07:40,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:43,164 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 [] [2023-08-29 23:07:45,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:46,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:47,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:49,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:51,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:52,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:54,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:55,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:07:58,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:08:00,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:08:01,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:08:03,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:08:04,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:08:05,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:08:20,544 INFO L130 PetriNetUnfolder]: 103433/141299 cut-off events. [2023-08-29 23:08:20,545 INFO L131 PetriNetUnfolder]: For 803/803 co-relation queries the response was YES. [2023-08-29 23:08:20,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284865 conditions, 141299 events. 103433/141299 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 4157. Compared 924917 event pairs, 79330 based on Foata normal form. 16/54602 useless extension candidates. Maximal degree in co-relation 284848. Up to 14146 conditions per place. [2023-08-29 23:08:21,239 INFO L137 encePairwiseOnDemand]: 677/687 looper letters, 579 selfloop transitions, 50 changer transitions 0/629 dead transitions. [2023-08-29 23:08:21,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 629 transitions, 2870 flow [2023-08-29 23:08:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:08:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:08:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4579 transitions. [2023-08-29 23:08:21,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47608650447078393 [2023-08-29 23:08:21,250 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4579 transitions. [2023-08-29 23:08:21,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4579 transitions. [2023-08-29 23:08:21,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:21,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4579 transitions. [2023-08-29 23:08:21,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 327.07142857142856) internal successors, (4579), 14 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 687.0) internal successors, (10305), 15 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,274 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 687.0) internal successors, (10305), 15 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,275 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 324 flow. Second operand 14 states and 4579 transitions. [2023-08-29 23:08:21,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 629 transitions, 2870 flow [2023-08-29 23:08:21,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 629 transitions, 2869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:21,282 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 687 flow [2023-08-29 23:08:21,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=687, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2023-08-29 23:08:21,283 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2023-08-29 23:08:21,283 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 687 flow [2023-08-29 23:08:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 282.0) internal successors, (3384), 12 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:21,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:21,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:08:21,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:08:21,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2094588439, now seen corresponding path program 1 times [2023-08-29 23:08:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:08:21,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106256288] [2023-08-29 23:08:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:21,494 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 [2023-08-29 23:08:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:08:21,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:08:21,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:08:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:08:21,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:21,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:08:21,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:08:21,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106256288] [2023-08-29 23:08:21,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106256288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:21,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:21,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:08:21,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116083200] [2023-08-29 23:08:21,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:21,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:08:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:08:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:08:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:08:21,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 687 [2023-08-29 23:08:21,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 687 flow. Second operand has 5 states, 5 states have (on average 292.4) internal successors, (1462), 5 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:21,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 687 [2023-08-29 23:08:21,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:39,120 INFO L130 PetriNetUnfolder]: 137234/189814 cut-off events. [2023-08-29 23:08:39,120 INFO L131 PetriNetUnfolder]: For 1655/1655 co-relation queries the response was YES. [2023-08-29 23:08:39,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382783 conditions, 189814 events. 137234/189814 cut-off events. For 1655/1655 co-relation queries the response was YES. Maximal size of possible extension queue 5325. Compared 1325776 event pairs, 91700 based on Foata normal form. 0/77609 useless extension candidates. Maximal degree in co-relation 382757. Up to 141298 conditions per place. [2023-08-29 23:08:40,451 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 232 selfloop transitions, 4 changer transitions 0/236 dead transitions. [2023-08-29 23:08:40,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 236 transitions, 1675 flow [2023-08-29 23:08:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1616 transitions. [2023-08-29 23:08:40,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045123726346433 [2023-08-29 23:08:40,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1616 transitions. [2023-08-29 23:08:40,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1616 transitions. [2023-08-29 23:08:40,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:40,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1616 transitions. [2023-08-29 23:08:40,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 323.2) internal successors, (1616), 5 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,463 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 687 flow. Second operand 5 states and 1616 transitions. [2023-08-29 23:08:40,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 236 transitions, 1675 flow [2023-08-29 23:08:40,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 236 transitions, 1522 flow, removed 37 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:40,469 INFO L231 Difference]: Finished difference. Result has 97 places, 118 transitions, 618 flow [2023-08-29 23:08:40,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=618, PETRI_PLACES=97, PETRI_TRANSITIONS=118} [2023-08-29 23:08:40,470 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 16 predicate places. [2023-08-29 23:08:40,470 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 118 transitions, 618 flow [2023-08-29 23:08:40,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.4) internal successors, (1462), 5 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:40,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:40,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:40,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:08:40,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:08:40,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash -507690306, now seen corresponding path program 1 times [2023-08-29 23:08:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:08:40,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966681935] [2023-08-29 23:08:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:40,680 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 [2023-08-29 23:08:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:08:40,681 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:08:40,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:08:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:08:40,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:40,819 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:08:40,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 23:08:40,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:08:40,853 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 20 [2023-08-29 23:08:40,880 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:08:40,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:08:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:40,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:08:40,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:08:40,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966681935] [2023-08-29 23:08:40,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966681935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:40,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:40,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:08:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304528282] [2023-08-29 23:08:40,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:40,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:08:40,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:08:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:08:40,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:08:41,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 687 [2023-08-29 23:08:41,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 118 transitions, 618 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:41,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:41,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 687 [2023-08-29 23:08:41,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:57,133 INFO L130 PetriNetUnfolder]: 131454/181304 cut-off events. [2023-08-29 23:08:57,133 INFO L131 PetriNetUnfolder]: For 14403/14403 co-relation queries the response was YES. [2023-08-29 23:08:57,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384872 conditions, 181304 events. 131454/181304 cut-off events. For 14403/14403 co-relation queries the response was YES. Maximal size of possible extension queue 5096. Compared 1239397 event pairs, 101840 based on Foata normal form. 0/82874 useless extension candidates. Maximal degree in co-relation 384843. Up to 181304 conditions per place. [2023-08-29 23:08:58,272 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 115 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2023-08-29 23:08:58,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 116 transitions, 846 flow [2023-08-29 23:08:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:08:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:08:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 954 transitions. [2023-08-29 23:08:58,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462882096069869 [2023-08-29 23:08:58,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 954 transitions. [2023-08-29 23:08:58,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 954 transitions. [2023-08-29 23:08:58,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:58,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 954 transitions. [2023-08-29 23:08:58,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:58,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:58,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:58,281 INFO L175 Difference]: Start difference. First operand has 97 places, 118 transitions, 618 flow. Second operand 3 states and 954 transitions. [2023-08-29 23:08:58,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 116 transitions, 846 flow [2023-08-29 23:08:58,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 840 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:58,295 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 610 flow [2023-08-29 23:08:58,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=610, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2023-08-29 23:08:58,296 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2023-08-29 23:08:58,296 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 610 flow [2023-08-29 23:08:58,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:58,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:58,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:58,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:58,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:08:58,507 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:08:58,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -507690307, now seen corresponding path program 1 times [2023-08-29 23:08:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:08:58,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643690420] [2023-08-29 23:08:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:58,508 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 [2023-08-29 23:08:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:08:58,509 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:08:58,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:08:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:08:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:08:58,682 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-29 23:08:58,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-29 23:08:58,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-08-29 23:08:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:08:58,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:08:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:08:58,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:08:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:58,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:08:58,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:08:58,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643690420] [2023-08-29 23:08:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643690420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:58,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:58,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:08:58,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299872098] [2023-08-29 23:08:58,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:58,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:08:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:08:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:08:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:08:59,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 687 [2023-08-29 23:08:59,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:59,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:59,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 687 [2023-08-29 23:08:59,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:14,241 INFO L130 PetriNetUnfolder]: 125674/172794 cut-off events. [2023-08-29 23:09:14,241 INFO L131 PetriNetUnfolder]: For 13705/13705 co-relation queries the response was YES. [2023-08-29 23:09:14,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366730 conditions, 172794 events. 125674/172794 cut-off events. For 13705/13705 co-relation queries the response was YES. Maximal size of possible extension queue 4829. Compared 1164148 event pairs, 97080 based on Foata normal form. 0/80514 useless extension candidates. Maximal degree in co-relation 366700. Up to 172794 conditions per place. [2023-08-29 23:09:15,367 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 113 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-08-29 23:09:15,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 114 transitions, 834 flow [2023-08-29 23:09:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:09:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:09:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 958 transitions. [2023-08-29 23:09:15,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648229015041242 [2023-08-29 23:09:15,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 958 transitions. [2023-08-29 23:09:15,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 958 transitions. [2023-08-29 23:09:15,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:15,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 958 transitions. [2023-08-29 23:09:15,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,373 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 610 flow. Second operand 3 states and 958 transitions. [2023-08-29 23:09:15,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 114 transitions, 834 flow [2023-08-29 23:09:15,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 114 transitions, 833 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:09:15,385 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 607 flow [2023-08-29 23:09:15,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=607, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2023-08-29 23:09:15,386 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2023-08-29 23:09:15,386 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 607 flow [2023-08-29 23:09:15,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:15,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:15,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:09:15,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:09:15,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash -495740347, now seen corresponding path program 1 times [2023-08-29 23:09:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:09:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010626270] [2023-08-29 23:09:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:15,590 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 [2023-08-29 23:09:15,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:09:15,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:09:15,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:09:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:09:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:09:15,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:09:15,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:09:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010626270] [2023-08-29 23:09:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010626270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:09:15,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:09:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:09:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050780365] [2023-08-29 23:09:15,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:09:15,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:09:15,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:09:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:09:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:09:15,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 687 [2023-08-29 23:09:15,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 607 flow. Second operand has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:15,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 687 [2023-08-29 23:09:15,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:39,788 INFO L130 PetriNetUnfolder]: 188376/262100 cut-off events. [2023-08-29 23:09:39,789 INFO L131 PetriNetUnfolder]: For 24287/24287 co-relation queries the response was YES. [2023-08-29 23:09:41,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553465 conditions, 262100 events. 188376/262100 cut-off events. For 24287/24287 co-relation queries the response was YES. Maximal size of possible extension queue 7325. Compared 1930136 event pairs, 119980 based on Foata normal form. 2260/131200 useless extension candidates. Maximal degree in co-relation 553434. Up to 172782 conditions per place. [2023-08-29 23:09:42,242 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 190 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2023-08-29 23:09:42,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 205 transitions, 1313 flow [2023-08-29 23:09:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:09:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:09:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1601 transitions. [2023-08-29 23:09:42,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660844250363901 [2023-08-29 23:09:42,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1601 transitions. [2023-08-29 23:09:42,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1601 transitions. [2023-08-29 23:09:42,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:42,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1601 transitions. [2023-08-29 23:09:42,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.2) internal successors, (1601), 5 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,252 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 607 flow. Second operand 5 states and 1601 transitions. [2023-08-29 23:09:42,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 205 transitions, 1313 flow [2023-08-29 23:09:42,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 205 transitions, 1312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:09:42,312 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 665 flow [2023-08-29 23:09:42,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=665, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2023-08-29 23:09:42,314 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2023-08-29 23:09:42,314 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 665 flow [2023-08-29 23:09:42,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:42,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:42,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:42,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:09:42,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-29 23:09:42,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1441468275, now seen corresponding path program 1 times [2023-08-29 23:09:42,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:09:42,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249367500] [2023-08-29 23:09:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:42,524 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 [2023-08-29 23:09:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:09:42,527 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:09:42,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:09:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:42,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:09:42,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:42,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:09:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:42,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:09:42,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:09:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249367500] [2023-08-29 23:09:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249367500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:09:42,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:09:42,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:09:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819662351] [2023-08-29 23:09:42,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:09:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:09:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:09:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:09:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:09:42,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 687 [2023-08-29 23:09:42,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 665 flow. Second operand has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:42,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 687 [2023-08-29 23:09:42,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand